JP6546014B2 - Digital protection controller - Google Patents

Description

  The present invention relates to a digital protection control device used for digital protection control of a power system or the like.

  The digital protection control device has different programs for realizing the digital protection control function depending on the configuration of the power system to be protected and controlled. Manufacturers of digital protection and control devices guarantee the quality of the device to the user by testing the hardware configuration and the program as a pair.

Japanese Patent Application Publication No. 2002-218642

  The program may be changed and a partial function may be added to the existing quality guaranteed digital protection controller. In that case, it is necessary to confirm by testing that the additional part conforms to the existing hardware configuration and functional configuration and does not adversely affect the overall program operation. Even if the quality assurance function applied to one digital protection controller is applied to another digital protection controller, the test range extends to the entire function of the digital protection controller. Therefore, the time and cost required for the test become a problem.

  For digital protection control devices that are already installed and in operation, the manufacturer sometimes visits the installation place of the digital protection control device to perform program change work, but such program change work is performed by the user There is also something to do. At this time, if the user erroneously saves an inappropriate program, a problem may occur in the operation of the digital protection controller.

  The present embodiment has been made in view of the problems as described above, and it is not necessary to test the entire function when changing the program related to a part of the function of the digital protection control device, and the function change or addition is made. It is an object of the present invention to provide a highly convenient digital protection control device capable of reducing the time required for testing and cost. Another object of the present invention is to provide a highly reliable digital protection and control device by preventing an erroneous program change from being performed.

The digital protection control device of this embodiment is for protecting a power system, and comprises an analog / digital conversion unit for converting an amount of electricity taken from the power system into digital data, and a non-volatile memory, and the digital protection The first storage unit for storing hardware and function configuration information of a control device, a protection control program, and the digital data output from the analog / digital conversion unit are stored in the storage unit. An arithmetic processing unit that performs arithmetic processing in accordance with a protection control program, the protection control program comprising a division program divided into a plurality of divisions according to the function of the digital protection and control unit; , it looks including the configuration information of the hardware and functions which the dividing program corresponds, The processing unit further includes a second storage unit configured of a volatile memory, and the arithmetic processing unit temporarily stores, in the second storage unit, the divided program for which the storage request to the first storage unit has been made. The configuration information of the hardware and the function of the divided program which has been saved and the storage request has been made is compared with the configuration information of the hardware and the function of the digital protection control device stored in the first storage unit. If so, the divided program for which the storage request has been made is stored in the first storage unit, and each of the divided programs has combination information of programs that can guarantee the operation and quality of each divided program, The first storage unit includes configuration information of the digital protection control device, a main area in which the protection control program is stored, and a division program for which the storage request has been made. When saving the region, having a sub-region where the protective control program stored in the main area is stored.

FIG. 1 is a block diagram showing a configuration of a digital protection control device according to a first embodiment. It is a block diagram which shows the structure of a calculating part. It is a figure which shows the structure of a basic program. It is a figure which shows the structure of an addition program. It is a flow chart which shows change operation of a program for protection control. It is a block diagram which shows the structure of the calculating part of the digital protection control apparatus which concerns on 2nd Embodiment. It is a figure which shows the structure of an addition program. It is a flow chart which shows change operation of a program for protection control. It is a flowchart which shows confirmation operation | movement of the program for protection control after a change. It is a block diagram which shows the structure of the calculating part of the digital protection control apparatus which concerns on 3rd Embodiment.

Hereinafter, digital protection and control devices according to embodiments will be described with reference to the drawings.
First Embodiment
[Constitution]
FIG. 1 shows the configuration of a digital protection control device according to the first embodiment. The digital protection control device 100 includes an analog / digital conversion unit 1, an operation unit 2, a transmission unit 3, an input / output unit 4, and a display unit 5.

  The electrical quantity of the power system, that is, the voltage or the current is input to the analog / digital converter 1 from an external device. The analog-to-digital converter 1 performs analog-to-digital conversion which samples an analog input value at a predetermined cycle and converts it into a quantized digital quantity.

  The arithmetic unit 2 performs arithmetic processing associated with the digital protection control function using the digital amount converted by the analog / digital converter 1. Details of the calculation unit 2 will be described later.

  The transmission unit 3 transmits and receives data with an external device such as a remote monitoring control device via a communication network. The input / output unit 4 inputs and outputs cutting information by an external device and a contact. The display unit 5 includes an LCD, an LED, and the like, and displays the state of the digital protection control device 100 and the information stored in the digital protection control device 100. The analog / digital conversion unit 1, the calculation unit 2, the transmission unit 3, the input / output unit 4 and the display unit 5 are connected by a bus and data can be exchanged between them.

  FIG. 2 shows the configuration of the calculation unit 2. The arithmetic unit 2 includes an arithmetic processing unit 21, a non-volatile memory 23 as a first storage unit, and a volatile memory 22 as a second storage unit. The operation unit 2, the non-volatile memory 23, and the volatile memory 22 are connected by a bus, and data can be exchanged between them.

  The arithmetic processing unit 21 is configured by, for example, a processor such as a CPU. The non-volatile memory 23 can hold data contents even when the main power is turned off, and an EEPROM or the like can be used, for example. The volatile memory 22 can be, for example, a DRAM, an SRAM, or the like which is excellent in high-speed read / write performance.

  The non-volatile memory 23 stores configuration information 200 of the digital protection control device and a protection control program 230. The configuration information 200 of the digital protection control device is configuration information of hardware and functions of the entire digital protection control device 100.

  The protection control program 230 is a program necessary for the operation of the digital protection control device 100. The arithmetic processing unit 21 copies the protection control program 230 stored in the non-volatile memory 23 to the volatile memory 22 and reads the protection control program 230 copied to the volatile memory 22, thereby the digital protection control device 100. To realize the function of For example, the arithmetic processing unit 21 arithmetically processes the digital amount output from the analog / digital conversion unit 1 in accordance with the protection control program 230. Further, although the details will be described later, when changing the protection control program 230, the program for rewriting is temporarily stored in the volatile memory 22.

  The protection control program 230 is composed of a divided program divided into a plurality of parts according to the function realized by the digital protection control device 100. Here, a basic program 231 operating at startup of the digital protection control device 100 and an additional program 232 operating as an additional function after startup of the device are stored as divided programs.

  The additional program 232 can be created according to a function to be performed after the digital protection control device 100 starts up, such as a communication function or an arithmetic function. Although one additional program is illustrated in FIG. 2, the number of additional programs may be two or more. In addition, there may be no additional program and only the basic program is saved when the additional function is not implemented. When changing the already implemented function of the digital protection control device 100, the basic program 231 or the additional program 232 already stored is rewritten. When adding a new function of the digital protection control device 100, a new additional program is written.

  FIG. 3 shows the configuration of the basic program 231. The basic program 231 comprises basic program configuration information 2310, basic program identification information 2311 and a basic program module group 2312. The configuration information 2310 of the basic program means configuration information of hardware and functions corresponding to the basic program 231, that is, configuration information of hardware and functions capable of operating the quality of the basic program 231 and capable of quality assurance. Basic program identification information 2311 represents information that represents the basic program 231 itself and allows identification from other programs, and is, for example, an ID. The basic program module group 2312 means a group of unit programs for realizing the function when the digital protection control device 100 is activated.

  FIG. 4 shows the configuration of the additional program 232. The additional program 232 includes additional program configuration information 2320, additional program identification information 2321 and an additional program module 2322. The configuration information 2320 of the additional program means configuration information of hardware and functions corresponding to the additional program 232, that is, configuration information of hardware and functions capable of operating the quality of the additional program 232 and capable of quality assurance. The additional program identification information 2321 represents information that represents the additional program 232 itself and makes it distinguishable from other programs, and is, for example, an ID. The additional program module 2322 means a unit program for realizing an additional function after activation of the digital protection control device 100.

[Operation]
The operation of the digital protection control device 100 of the first embodiment will be described. First, the normal operation of the digital protection control device 100 will be described. The normal operation time means that the protection control operation of the digital protection control device 100 is performed without changing the protection control program 230. During normal operation, the arithmetic processing unit 21 copies the protection control program 230 stored in the non-volatile memory 23 to the volatile memory 22 and executes the protection control program 230 on the volatile memory 22 to perform protection control. To realize the function.

  Next, the change operation of the protection control program 230 will be described with reference to the flowchart of FIG. Regarding the change operation of the protection control program 230, there are cases where one of the divided programs consisting of the basic program 231 and the additional program 232 is rewritten and writing of a new additional program is carried out. Rewriting and writing may be performed simultaneously. Also, the program to be rewritten may be one or more. Here, the case where the basic program 231 and the additional program 232 are rewritten will be described as an example.

  The data of the basic program 231 ′ and the additional program 232 ′, which are programs for rewriting the basic program 231 and the additional program 232, are transmitted from the remote server or the like via the communication network with the data storage request signal. Sent to The basic program 231 ′ and the additional program 232 ′, which are rewriting programs, have the same configuration as the existing basic program 231 and the additional program 232.

  When the data storage request signal is received (step S01: Yes), the processing unit 21 of the processing unit temporarily stores the data of the basic program 231 ′ for rewriting and the additional program 232 ′ in the volatile memory 22 (see FIG. Step S02).

  The arithmetic processing unit 21 stores the configuration information 2310 of the basic program 231 ′ stored in the volatile memory 22 and the configuration information 2320 of the additional program 232 ′ in the configuration information 200 of the digital protection control device stored in the non-volatile memory 23. And (step S03).

  If the configuration information 2310 of the basic program 231 'and the configuration information 2320 of the additional program 232' do not match the configuration information 200 of the digital protection control device (step S03: No), deletion is performed without performing rewriting (step S04) .

  If the configuration information 2310 of the basic program 231 'and the configuration information 2320 of the additional program 232' match the configuration information 200 of the digital protection control device (step S03: Yes), the basic stored temporarily in the volatile memory 22. The program 231 ′ and the additional program 232 ′ are stored in the non-volatile memory 23 (step S05), and the existing basic program 231 or the additional program 232 is deleted.

  If the configuration information of one of the basic program 231 ′ and the additional program 232 ′ matches, and the other does not match, only the matching program is stored and the non-matching program is deleted. good. Alternatively, storage may be performed only when all programs match, and when there is even one program that does not match, all programs may be deleted without saving.

[Function effect]
In the first embodiment, the digital protection control device 100 includes an analog / digital conversion unit 1, a non-volatile memory 23 as a first storage unit, and an arithmetic processing unit 21. The analog / digital conversion unit 1 converts the amount of electricity taken from the power system into a digital amount. The non-volatile memory 23 stores hardware and function configuration information 200 of the digital protection control device, and a protection control program 230. The arithmetic processing unit 21 arithmetically processes the digital amount output from the analog / digital converter 1 according to the protection control program 230. The protection control program 230 is divided into a plurality of divided programs according to the function of the digital protection control device 100, for example, a basic program 231 and an additional program 232, and each divided program corresponds to hardware corresponding to the divided program. And function configuration information 2310 and 2320.

  By dividing the protection control program 230 according to functions and providing hardware and function configuration information corresponding to each divided program, even if the divided programs are stored in the same storage unit, the existing functions can be used. When the change is to be made, the basic program 231 or the additional program 232 for realizing the function may be rewritten. Also, when adding a new function, a new additional program may be written. This eliminates the need to rewrite the entire protection control program 230, so that the time for the change operation can be shortened. Furthermore, tests after program change need only be performed on functions that have changed. Thus, the digital protection control device 100 can be provided with high convenience.

  Further, each divided program includes configuration information 2310 and 2320 of hardware and functions corresponding to the divided program, so that the division program erroneously occurs in the digital protection control device 100 including hardware and functional configurations not corresponding. It can be prevented from being saved. This can provide a highly reliable digital protection control device 100.

  Specifically, the digital protection control device 100 further includes a volatile memory 22 as a second storage unit. The arithmetic processing unit 21 temporarily stores in the volatile memory 22 the divided program for which the storage request to the non-volatile memory 23 has been made. The arithmetic processing unit 21 compares the hardware and function configuration information 2310 and 2320 of the division program for which the storage request has been made with the hardware and function configuration information 200 of the digital protection control unit stored in the non-volatile memory 23. If the comparison results in agreement, the divided program for which the storage request has been made is stored in the non-volatile memory 23. If the comparison results do not match, the divided program for which the storage request has been made is deleted from the volatile memory 22.

  Such an operation can prevent the division program from being erroneously stored in the incompatible digital protection control device 100.

Second Embodiment
[Constitution]
A digital protection and control device 100 according to the second embodiment will be described with reference to FIGS. In the following embodiments, only differences from the above-described embodiments will be described, and the same parts as the above-described embodiments will be assigned the same reference numerals and detailed descriptions thereof will be omitted.

  As shown in FIG. 6, in the second embodiment, the non-volatile memory 23 is provided with a main area 24 and a sub area 25. The main area 24 stores hardware and function configuration information 200 and a protection control program 230. The protection control program 230 is divided into a basic program 231 and an additional program 232 as in the first embodiment. 6, the program change operation is performed, and the main area 24 is stored with the protection control program 230 ′ in which the rewriting basic program 231 ′ and the additional program 232 ′ are stored. ing.

  No data is stored in the sub area 25 of the non-volatile memory 23 during normal operation, but the existing protection control program 230 stored in the main area 24 is temporarily stored in the program change operation. .

  As shown in FIG. 7, in the second embodiment, the additional program 232 has program combination information 2323 in addition to configuration information 2320 of additional programs, additional program identification information 2321 and additional program modules 2322.

  The program combination information 2323 is combination information of programs which can guarantee the operation and quality of the additional program 232 when the additional program 232 is used in combination with another program. The program combination information 2323 can be, for example, a basic program that is essential to the operation of the additional program 232 and information on the additional program (hereinafter referred to as "essential program information") and a basic program that can not be used in combination with the additional program 232. And information on additional programs (hereinafter referred to as "NG program information"). The required program information and the information on the NG program can be, for example, identification information of a target program.

[Operation]
The operation of the digital protection control device 100 according to the second embodiment will be described with reference to the flowcharts of FIGS. In the second embodiment, an operation at the time of program change and an operation after the change will be described.

  FIG. 8 shows a program change operation. Steps S11 to S14 in FIG. 8 are the same as steps S01 to S04 shown in the flowchart of FIG. 5.

  That is, when the data storage request signal is received (step S11: Yes), the arithmetic processing unit 21 of the arithmetic unit 2 temporarily transmits the data of the basic program 231 'for rewriting and the additional program 232' to the volatile memory 22. Save (step S12). The arithmetic processing unit 21 stores the configuration information 2310 of the basic program 231 ′ and the configuration information 2320 of the additional program 232 ′ stored in the volatile memory 22 in the main area 24 of the non-volatile memory 23. The configuration information 200 is compared with the configuration information 200 (step S13). If the configuration information 2310 of the basic program 231 'and the configuration information 2320 of the additional program 232' do not match the configuration information 200 of the digital protection control device (step S13: No), deletion is performed without performing rewriting work (step S14). .

  If the configuration information 2310 of the basic program 231 ′ and the configuration information 2320 of the additional program 232 ′ match the configuration information 200 of the digital protection control device (step S13: Yes), the arithmetic processing unit 21 determines that the main contents of the non-volatile memory 23 are The existing basic program 231 or additional program 232 stored in the area 24 is temporarily copied to the sub area 25 (step S15). That is, before the basic program for rewriting 231 ′ and the additional program 232 ′ are stored in the main area 24, the existing basic program 231 and the additional program 232 are saved in the sub area 25. After saving the existing program, the basic program 231 'and the additional program 232' temporarily stored in the volatile memory 22 are stored in the main area 24 (step S16). The existing basic program 231 and additional program 232 are deleted.

  When the program change operation as described above is completed, the digital protection control device 100 performs an operation to confirm that the changed program is appropriate before starting the operation according to the changed program. FIG. 9 shows the confirmation operation after the change. Here, the arithmetic processing unit 21 is still in the state of being operated by the protection control program 230 before rewriting, which is copied to the volatile memory 22.

  When there is a program for rewriting stored in the main area 24 in response to the storage request (step S20: Yes), the arithmetic processing unit 21 stores the rewritten basic program 231 stored in the main area 24 of the nonvolatile memory 23. The configuration information 2310 of 'and the configuration information 2320 of the additional program 232' are compared with the configuration information 200 of the digital protection control device (step S21).

  If one or both of the configuration information 2310 of the basic program 231 ′ after rewriting and the configuration information 2320 of the additional program 232 ′ match (step S21: Yes), the arithmetic processing unit 21 adds the information after rewriting The combination information 2323 of the program 232 ′ is collated with other programs stored in the main area 24 to determine whether the combination of the other programs guarantees the operation and quality of the additional program 232 ′ Step S22).

  For example, when the combination information 2323 is composed of required program information and NG program information, the basic program and additional program described in the required program information are stored in the main area 24 and described in the NG program information. If the basic program and the additional program being stored are not stored in the main area 24, it is determined that the operation and quality of the additional program 232 'are guaranteed. If the basic program and the additional program described in the essential program information are not stored in the main area 24 or the basic program and the additional program described in the NG program information are not stored in the main area 24, the additional program It is determined that the operation and quality of 232 'are not guaranteed.

  If it is determined that the operation and the quality of the additional program 232 'are guaranteed as a result of the collation (Step S22: Yes), the operation of confirming whether the program after the change is appropriate is ended. The arithmetic processing unit 21 deletes the existing protection control program 230 stored in the sub area 25 (step S23), and restarts the digital protection control device 100 (step S24).

  Specifically, the protection control program 230 'including the rewritten basic program 231' and the additional program 232 'is copied to the non-volatile memory 23, and the protection control program 230' on the volatile memory 22 is executed. Do. Thus, the digital protection control device 100 performs the protection control operation according to the changed program.

  Returning to step S21, when either or both of the configuration information 2310 of the basic program 231 'and the configuration information 2320 of the additional program 232' do not match (step S21: No), the program after the change is digital protection It does not correspond to the hardware and function configuration of the control device 100. Therefore, it is not appropriate to operate the digital protection control device 100 according to the changed program.

  Also, when it is determined that the operation and the quality of the additional program 232 ′ are not guaranteed as a result of the comparison, the digital protection control device 100 is operated according to the changed program as a result of the comparison (step S22: No). It is not appropriate.

  In these cases (steps S21 and S22: No), the arithmetic processing unit 21 performs an operation of returning the existing protection control program 230 stored in the sub area 25 to the main area 24. Specifically, the configuration information 2310 of the basic program of the existing protection control program 230 stored in the sub area 25 and the configuration information 2320 of the additional program 232 are stored in the main area 24 of the digital protection control device. The configuration information 200 is compared (step S25). If the configuration information 2310 of the basic program and the configuration information 2320 of the additional program 232 do not match the configuration information 200 of the digital protection control device (step S25: No), the protection control program 230 of the sub area 25 is set to the main area 24. It can not be returned. In this state, the digital protection control device 100 is in a state where an appropriate program for performing the protection control operation is not stored, so it is preferable to notify an alarm or the like from the transmission unit 3 (step S26).

  If the configuration information 2310 of the basic program and the configuration information 2320 of the additional program 232 match the configuration information 200 of the digital protection control device (step S 25: Yes), the arithmetic processing unit 21 is stored in the sub area 25. The combination information 2323 of each additional program 232 is collated with the other programs stored in the sub area 25 to confirm whether the combination of the other programs guarantees the operation and quality of the additional program 232 ( Step S27). The specific matching operation is the same as that described in step S22.

  If the operation and the quality of the additional program 232 are not guaranteed as a result of the collation (step S27: No), the program 230 for protection control of the sub area 25 can not be returned to the main area 24. 21 may notify an alarm or the like from the transmission unit 3 (step S26).

  As a result of the comparison, if the operation and the quality of the additional program 232 are guaranteed (step S27: Yes), the existing protection control program 230 stored in the sub area 25 is transferred to the main area 24 ( Step S28) The basic program 231 'for rewriting and the additional program 232' are deleted. When returning the existing protection control program 230, only the program that has been rewritten may be returned, or the entire protection control program may be rewritten. The digital protection control device 100 is restarted (step S24), and the operation of the digital protection control device 100 is started by the protection control program 230 before the change.

  The arithmetic processing unit 21 stores the configuration information 2310 of the basic program 231 'for rewriting and the configuration information 2320 of the additional program 231' stored in the main area 24 of the non-volatile memory 23, and the configuration information 200 of the digital protection control device. A comparison is made (step S21).

  The comparison of the configuration information 2320 of the rewriting basic program 231 'and the additional program 232' shown in step S21 of the confirmation operation and the configuration information 200 of the digital protection control device is also performed in step S13 of the program change operation. Therefore, although step S21 may be omitted, it is possible to more reliably prevent erroneous program storage by comparing configuration information twice in the change operation and the confirmation operation.

  In the above-described example, the additional program 232 includes the program combination information 2323. However, the basic program 231 may also include combination information of programs capable of assuring the operation and quality of the basic program 231. In that case, in step S22 of FIG. 9, the arithmetic processing unit 21 also checks the combination information with another program for the rewriting basic program 231 ′, and the combination of the other programs corresponds to the operation of the basic program 231 ′. And it is good to judge whether it is what guarantees the quality.

[Function effect]
(1) In the second embodiment, each of the additional programs 232 which are divided programs has combination information 2323 of programs which can guarantee the operation and quality of each additional program 232. In addition, the non-volatile memory 23 has a main area 24 and a sub area 25. In the main area 24, configuration information 200 of the digital protection control device and a protection control program 230 are stored. The sub area 25 stores the existing protection control program 230 stored in the main area 24 when storing the rewriting basic program 231 'or the additional program 232' for which the storage request has been made in the main area 24. Ru.

  By incorporating the combination information 2323 of the program into the additional program 232 and further providing the sub area 25 for temporarily saving the existing protection control program 230 at the time of rewriting, for example, the user side erroneously adds an inappropriate additional program. Even if it is stored, it can be determined that the operation and the quality of the additional program are not guaranteed, and it is possible to prevent the digital protection control device 100 from operating with the wrong program. Furthermore, since it is possible to return from the program saved erroneously to the existing program saved in the sub area 25, there is no need to stop the operation of the digital protection control device 100. As a result, it is possible to provide the digital protection and control device 100 with high reliability and convenience.

  As a specific operation, when the arithmetic processing unit 21 has the rewriting basic program 231 ′ or the additional program 232 ′ stored in the main area 24 in response to the storage request, the rewriting basic program 231 ′ or The combination information 2323 of the additional program 232 ′ is collated with other divided programs stored in the main area 24. If it is determined that the quality and the operation of the basic program 231 ′ for rewriting or the additional program 232 ′ are not guaranteed as a result of the collation, the existing protection control program 230 stored in the sub area 25 is stored in the main area 24. The basic program 231 'for rewriting and the divided programs stored in the main area 24 are deleted.

  Such a confirmation operation can prevent the program of the wrong combination from being saved, and can quickly restore the existing program.

(2) The combination information 2323 possessed by each additional program 232 is information of other divided programs necessary for the operation of the additional program 232 and information of other additional programs which can not be used in combination with the additional program 232 It is good to assume. As a result, it is possible to prevent a failure due to a state in which the additional program 232 can not operate or due to another program.

(3) The arithmetic processing unit 21 performs, as confirmation operation, configuration information 2310 and 2320 of hardware and function of the basic program 231 'for rewriting and additional program 232', and configuration information of hardware and function of digital protection control device A comparison with 200 may be performed, and when the configuration information does not match, the protection control program 230 stored in the sub area 25 is stored in the main area 24, and the rewriting basic program stored in the main area 24 You may delete 231 'or additional program 232'. A more reliable digital protection control device 100 can be provided by comparing the configuration information also in the confirmation operation in addition to the change of the program.

Third Embodiment
A digital protection control device 100 according to the third embodiment will be described with reference to FIG.
In the third embodiment, as shown in FIG. 10, an error program information storage area 26 is provided in the non-volatile memory 23 of the second embodiment.

  In the error program information storage area 26, since an error in the configuration information or combination is detected in the change operation or check operation of the program, the information of the rewriting basic program 231 ′ or the additional program 232 ′ deleted as unusable. Is saved.

  For example, in step S13 of FIG. 8 or step S21 of FIG. 9, the arithmetic processing unit 21 stores the configuration information 2310 of the basic program 231 ′ for rewriting or the configuration information 2320 of the additional program 232 ′ as configuration information 200 of the digital protection control device. When it is determined that they do not match (steps S13 and S21: No), the arithmetic processing unit 21 stores the information of the non-matching basic program 231 ′ or the additional program 232 ′ in the error program information storage area 26. The information of the basic program 231 ′ or the additional program 232 ′ may be, for example, identification information of each program.

  Further, for example, in step S22 of FIG. 9, the arithmetic processing unit 21 collates the combination information 2323 of the rewritten additional program 232 ′ with other programs stored in the main area 24, and combines other programs. However, when it is determined that the operation and the quality of the additional program 232 ′ are not guaranteed (Step S22: No), the arithmetic processing unit 21 stores the information of the additional program 232 ′ in the error program information storage area 26. Information of the additional program 232 ′ may be, for example, additional program identification information 2321.

  As described above, storing the information of the rewriting program determined to be unusable makes it possible to confirm the contents and use it for verification work and the like, which is highly convenient.

  When the information of the basic program 231 ′ or the additional program 232 ′ is stored in the error program information storage area 26, an alarm may be output to an external device as a contact output of the input / output unit 4. The alarm may include information of the basic program 231 'or the additional program 232'. Alternatively, the information of the basic program 231 ′ or the additional program 232 ′ stored in the error program information storage area 26 may be displayed on the display unit 5. This makes it possible to promptly notify that the program rewrite has not been completed.

  Although an example in which the error program information storage area 26 is provided in the nonvolatile memory 23 of the second embodiment has been described here, the error program information storage area of the nonvolatile memory 23 of the first embodiment illustrated in FIG. 26 may be provided. In that case, in step S03 of FIG. 5, the arithmetic processing unit 21 determines that the configuration information 2310 of the basic program 231 'for rewriting or the configuration information 2320 of the additional program 232' does not match the configuration information 200 of the digital protection control device. When it is determined, the arithmetic processing unit 21 stores the information of the unmatched basic program 231 ′ or the additional program 232 ′ in the error program information storage area 26.

Other Embodiments
While several embodiments of the present invention have been described, these embodiments have been presented by way of example only and are not intended to limit the scope of the invention. These embodiments can be implemented in other various forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the invention described in the claims and the equivalents thereof as well as included in the scope and the gist of the invention.

  In the second embodiment, although the case where the program combination information 2323 includes the essential program information and the NG program information has been described, the present invention is not limited thereto. For example, the program combination information 2323 may be information listing all programs whose quality and operation of the additional program 232 'can be guaranteed when combined with the additional program 232'. In this case, when there is a program not included in the combination information among other programs stored in the main area 24, the arithmetic processing unit 21 guarantees the operation and the quality of the additional program 232 '. You may judge that it is not.

DESCRIPTION OF SYMBOLS 1 analog / digital conversion part 2 operation part 3 transmission part 4 input-output part 5 display part 21 arithmetic processing unit 22 volatile memory 23 non-volatile memory 24 main area 25 sub area 26 error program information storage area 100 digital protection control apparatus 200 digital Protection control device configuration information 230 Protection control program 230 'Protection control program after rewriting 231 Basic program 232 Additional program 231' Rewriting basic program 232 'Additional program for rewriting 2310 Basic program configuration information 2311 Basic program identification Information 2312 Basic program module group 2320 Configuration information of additional program 2321 Additional program identification information 2322 Additional program module 2323 Program combination information

Claims (9)

A digital protection controller for protecting a power system,
An analog-to-digital converter that converts the amount of electricity taken from the power system into digital data;
A first storage unit which is constituted by a non-volatile memory and stores hardware and function configuration information of the digital protection and control device, and a protection control program;
An arithmetic processing unit that performs arithmetic processing on the digital data output from the analog / digital converter in accordance with the protection control program stored in the storage unit;
The protection control program consists dividing program divided into a plurality depending on the function of the said digital protective control apparatuses, each of the split program, see contains the configuration information of the hardware and functions the divided program corresponding ,
Further comprising a second storage unit configured of volatile memory;
The arithmetic processing unit temporarily stores, in the second storage unit, the divided program for which the storage request to the first storage unit has been made, and the hardware and function of the divided program for which the storage request is issued. The configuration information is compared with the configuration information of the hardware and function of the digital protection and control device stored in the first storage unit, and if there is a match, the division program for which the storage request has been made is the first one. Save to storage section,
Each of the divided programs has combination information of programs which can guarantee the operation and quality of each divided program,
The first storage unit is
Configuration information of the digital protection and control device, and a main area in which the protection control program is stored;
A digital protection control device comprising: a sub-region in which the protection control program stored in the main area is stored when the division program for which the storage request has been made is stored in the main area . Further comprising a second storage unit configured of volatile memory;
The arithmetic processing unit temporarily stores, in the second storage unit, the divided program for which the storage request to the first storage unit has been made, and the hardware and function of the divided program for which the storage request is issued. The configuration information is compared with the configuration information of the hardware and function of the digital protection and control device stored in the first storage unit, and in the case of disagreement, the divided program for which the storage request has been made is the second one. The digital protection controller according to claim 1 , wherein the digital protection controller is deleted from the storage unit. When there is a divided program stored in the main area in response to the storage request, the arithmetic processing unit collates the combination information of the divided program with another divided program stored in the main area. If it is determined that the quality and operation of the divided program are not guaranteed, the protection control program stored in the sub area is stored in the main area, and the main area is requested according to the storage request. 3. A digital protection controller according to claim 1, wherein the stored division program is deleted. The combination information included in each of the divided programs is information of another divided program necessary for the operation of the divided program and information of another divided program which can not be used in combination with the divided program. A digital protection controller according to any one of claims 1 to 3 . The arithmetic processing unit, when there is a divided program stored in the main area in response to the storage request, includes hardware and function configuration information of the divided program stored in the main area in response to the storage request. And comparing the configuration information of the hardware and function of the digital protection control device, and if the two do not match, the protection control program stored in the sub area is stored in the main area, and the storage request is made according to the storage request. 5. The digital protection control device according to any one of claims 1 to 4 , wherein the division program stored in the main area is deleted. The first storage unit is an error for storing information of a divided program determined by the arithmetic processing unit not to match hardware and function configuration information with hardware and function configuration information of the digital protection control device. 6. A digital protection control apparatus according to claim 2 , further comprising a program information storage area. 4. The digital as set forth in claim 3, wherein the first storage unit has an error program information storage area for storing information of a divided program judged that the quality and the operation are not guaranteed by the arithmetic processing unit. Protection control device. 8. The digital protection control device according to claim 6 , further comprising a display unit for displaying the information stored in the error program information storage area. The digital protection controller according to any one of claims 6 to 8 , further comprising an output unit for outputting the information stored in the error program information storage area to an external device.

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