JP6178610B2 - Protection relay - Google Patents

Description

  Embodiments described herein relate generally to a protection relay.

  In conventional protection relays, the operator needs to switch the display screen when he / she wants to view a plurality of information related to his / her own protection relay such as an accident record of an accident that occurred in the power system and an event record indicating the operation record of the protection relay. .

  Moreover, in order to collect information on the protection relay at the other end connected on the same network, a tool such as a personal computer or a system in the substation is required.

JP 2003-9432 A

  For the operator, the operation of switching the display screen is complicated, and it is desirable that the information on the protection relay on the own end and the information on the protection relay on the other end can be easily compared.

  Therefore, in order to solve these problems, an embodiment of the present invention provides a protection relay that can easily compare a plurality of pieces of information.

In order to achieve the above object, the protection relay of the embodiment includes a display unit having a plurality of screen display areas, and self-end information that outputs self-end display information that is display information of the self-end protection relay to the display unit. An output unit, and the display unit displays the self-end display information output by the self-end information output unit in time series for each screen display area , and as the self-end display information A record of an accident that occurred in the power system, an operation record of the self-protection relay, a disturbance record that represents the time when the waveform of the current or voltage of the power system was disturbed are different in the plurality of screen display areas. Each is displayed in time series in the screen display area.

1 is an overall system diagram showing a relationship between a protection relay and peripheral devices according to a first embodiment. The block diagram which shows the structure of the protection relay which concerns on 1st Embodiment. An example of the display part of the protection relay which concerns on 1st Embodiment. The flowchart which shows the operation | movement of the protection relay which concerns on 1st Embodiment. The block diagram which shows the structure of the protection relay which concerns on 2nd Embodiment. The flowchart which shows operation | movement of the protection relay which concerns on 2nd Embodiment. The block diagram which shows the structure of the protection relay which concerns on 3rd Embodiment. The flowchart which shows operation | movement of the protection relay which concerns on 3rd Embodiment. The block diagram which shows the structure of the protection relay which concerns on 4th Embodiment. The flowchart which shows the operation | movement of the protection relay which concerns on 4th Embodiment.

  Hereinafter, embodiments will be described with reference to the drawings.

(First embodiment)
FIG. 1 is an overall system diagram showing the relationship between a protection relay and peripheral devices according to the first embodiment.

  The self-protection relay 1 monitors the power system 2a. When an accident or the like occurs in the power system 2a, the circuit breaker 3 is opened by outputting an open command to the circuit breaker 3 installed in the power system 2a. Let

  The self-protection relay 1 and the protection relays 10 a, 10 b, and 10 c are connected by the same network 4 and transmission path 5. The protection relays 10a, 10b and 10c connected to the protection relay 1 at its own end via the network 4 are hereinafter referred to as “protection relays at the other end”.

  The current transformer 6a is installed in the electric power system 2a, and the protective relay 1 at its own end takes in current from the electric power system 2a from the current transformer 6a.

  Similarly, the current transformer 6b is installed in the power system 2a, and the current transformers 6c and 6d are installed in the power system 2b. The protection relays 10a, 10b, and 10c at the other end receive current from the power system 2a or the power system 2b from the current transformers 6b, 6c, and 6d, respectively.

  FIG. 2 is a block diagram showing the configuration of the protection relay according to the first embodiment.

  As shown in FIG. 2, the self-protection relay 1 includes a communication unit 11, an input unit 12, a display unit 13, a storage unit 14, a relay calculation unit 15, and a self-end information output unit 16.

  The communication unit 11 is a communication device and a communication unit that exchange data with the protection relay 10 at the other end via the network 4 and the transmission path 5.

  The input unit 12 is an input device or input unit that performs input control such as buttons, switches, and a touch panel displayed on the display unit 13.

  The display unit 13 is a monitor such as a liquid crystal display, an organic EL (Electro Luminescence) display, or a plasma display, and has a plurality of screen display areas 130a, 130b, and 130c with respect to a single display unit 13 as shown in FIG. . The display unit 13 may have a touch panel function.

  FIG. 3 shows an example in which there are three screen display areas 130, but the number of screen display areas 130 can be changed by the operator operating the input unit 12.

  The storage unit 14 is a non-volatile storage device such as a hard disk drive (HDD) or storage means. In addition, a semiconductor memory such as a flash memory may be used without being limited to the nonvolatile storage unit, or a storage medium in which the semiconductor memory and the HDD are combined may be used.

  The storage unit 14 stores display information (own display information) of the self-protection relay 1.

  As an example of the self-display information, an accident record of an accident that occurred in the power system 2a, an event record indicating an operation record of the protection relay 1, and a disturbance record that indicates the time at which the current or voltage waveform of the power system 2a is disturbed Etc.

  The relay calculation unit 15 is a processing unit that acquires the current of the power system 2a from the current transformer 6a and performs relay calculation.

  The self-end information output unit 16 is a processing unit that acquires self-end display information from the storage unit 14 according to the operation of the input unit 12 by the operator and outputs the information to the display unit 13.

  The processing in the relay calculation unit 15 and the self-end information output unit 16 described above is performed by a processor such as a CPU (Central Processing Unit).

  Next, the operation of each component will be described with reference to FIG. FIG. 4 is a flowchart showing the operation of the protection relay according to the first embodiment.

  In the display unit 13, the number of screen display areas 130 is set in accordance with the operation of the input unit 12 by the operator (step S101).

  For example, as shown in FIG. 3, the number of screen display areas 130 of the display unit 13 is set to “3”.

  The self-end information output unit 16 acquires the self-end display information from the storage unit 14 according to the operation of the input unit 12 by the operator, and outputs it to the display unit 13 (step S102).

  The display unit 13 displays the end display information output by the end information output unit 16 in time series for each screen display area 130 (step S103).

  Specifically, when the self-end information output unit 16 outputs three pieces of self-display information of accident record, event record, and disturbance record, for example, the accident record is recorded in the screen display area 130a and the event record is recorded in the screen display area 130b. However, each of the self-display information is displayed in time series on the different screen display areas 130 such that the disturbance recording is displayed in the screen display area 130c.

  Here, accident records, event records, and disturbance records are recorded as the self-display information, but the electric quantity information of the electric power system 2 acquired from the current transformer 6 or an instrument transformer (not shown) and the transmission path 5 are used. It may be information acquired from another device.

  As described above, according to the protection relay according to the first embodiment, the display unit 13 has a plurality of screen display areas 130, and each screen display area 130 includes an accident record, an event record, and a disturbance record. Since end display information can be displayed in time series, a plurality of self-end display information can be easily compared.

  Specifically, the occurrence time (accident record) of the accident in the power system 2a, the disturbance of the current and voltage waveforms (disturbance record), the operation record (event record) of the protection relay 1 and the like can be simultaneously confirmed and compared. Therefore, it is useful for investigating the cause of the accident and confirming whether or not the shutoff command of the protection relay 1 has been tripped without any problem when the accident occurs.

  When displaying a plurality of relay elements of the protection relay 1 as an event record, the operation timing and history of each relay element can be referred to, and the operation can be easily confirmed when an accident occurs.

(Second Embodiment)
The configuration of the second embodiment will be described with reference to the drawings. In addition, the same part as 1st Embodiment is shown with the same code | symbol, and description is abbreviate | omitted. Hereinafter, a different part from 1st Embodiment is demonstrated.

  FIG. 5 is a block diagram illustrating a configuration of a protection relay according to the second embodiment.

  The second embodiment is different from the first embodiment in the self-end information output unit 21, the communication setting unit 22, and the other-end information acquisition unit 23.

  The self-end information output unit 21 is a processing unit that acquires the self-end display information or the self-end settling value from the storage unit 14 in accordance with the operation of the input unit 12 by the operator and outputs it to the display unit 13.

  The communication setting unit 22 is a processing unit that sets the protection relay 10 at the other end that performs communication in accordance with the operation of the input unit 12 by the operator.

  The other end information acquisition unit 23 acquires the other end display information or the other end settling value of the protection relay 10 at the other end set by the communication setting unit 22 from the communication unit 11 via the network 4, and displays it on the display unit 13. It is a processing part to output.

  Here, the other end display information is display information of the protection relay 10 at the other end, and examples of the other end display information include accident records, event records, disturbance records, and the like.

  The set value is the operating condition of the protective relay, the self-end set value is the operating condition of the self-end protective relay 1, and the other end set value is the operating condition of the other end protective relay 10.

  The processes in the self-end information output unit 21, the communication setting unit 22, and the other-end information acquisition unit 23 described above are performed by a processor such as a CPU.

  Next, the operation of each component will be described with reference to FIG. FIG. 6 is a flowchart showing the operation of the protection relay according to the second embodiment.

  The communication setting unit 22 sets the protection relay 10 at the other end that performs communication in accordance with the operation of the input unit 12 by the operator (step S201).

  In the display unit 13, the number of screen display areas 130 is set according to the operation of the input unit 12 by the operator (step S202).

  However, the number of screen display areas 130 of the display unit 13 may be automatically set according to the number of protection relays 10 at the other end set by the communication setting unit 22.

  The self-end information output unit 21 acquires the self-end display information or the self-end settling value from the storage unit 14 according to the operation of the input unit 12 by the operator, and outputs it to the display unit 13 (step S203).

  The other end information acquisition unit 23 acquires the other end display information or the other end settling value of the protection relay 10 at the other end set by the communication setting unit 22 from the communication unit 11 via the network 4, and displays it on the display unit 13. Output (step S204).

  In order to acquire the other end display information of the other end protection relay 10 or the other end set value by the other end information acquisition unit 23, an information sharing request signal is sent from the own end protection relay 1 to the other end protection relay 10. It is performed after confirming that the information can be shared.

  The display unit 13 displays different screen display areas for the corresponding self-end display information and the other end display information output from the self-end information output unit 21 and the other end information acquisition unit 23, or the corresponding self-end set value and the other end set value. (Step S205).

  Specifically, a case where the communication setting unit 22 sets the protection relays 10a and 10b at the other end and the number of screen display areas 130 is set to “3” is taken as an example.

  When the accident record of the self-protection relay 1 is output to the display unit 13 by the self-end information output unit 21, the other end protection relay 10a acquired by the other end information acquisition unit 23 as the corresponding other end display information. , 10b is output to the display unit 13.

  Then, the accident record of the self-protection relay 1 is displayed in the screen display area 130a shown in FIG. 3, the accident record of the protection relay 10a at the other end is displayed in the screen display area 130b, and the protection relay 10b at the other end is displayed in the screen display area 130c. Thus, the corresponding self-display information and the other-end display information are displayed in different screen display areas.

  Similarly, when the operating current value of the self-end protection relay 1 is output to the display unit 13 as a self-end setting value by the self-end information output unit 21, it is acquired by the other end information acquisition unit 23 as a corresponding other end set value. The operating current values of the other protection relays 10 a and 10 b are output to the display unit 13.

  Then, the operating current value of the protection relay 1 at its own end is displayed in the screen display area 130a shown in FIG. 3, the operating current value of the protection relay 10a at the other end is displayed in the screen display area 130b, and the other end of protection is displayed in the screen display area 130c. The operating current value of the relay 10b is displayed.

  As described above, according to the protection relay according to the second embodiment, the other end display information or the other end set value of the other end protection relay 10 can be acquired via the network 4.

  Further, the display unit 13 has a plurality of screen display areas 130, and displays the own end display information and the other end display information corresponding to the different screen display areas 130, or the corresponding own end set value and the other end set value, respectively. Therefore, it is possible to easily compare. This improves the efficiency of operation.

(Third embodiment)
The configuration of the third embodiment will be described with reference to the drawings. In addition, the same part as 1st Embodiment and 2nd Embodiment is shown with the same code | symbol, and description is abbreviate | omitted. Hereinafter, parts different from the first embodiment and the second embodiment will be described.

  FIG. 7 is a block diagram illustrating a configuration of a protection relay according to the third embodiment.

  The third embodiment differs from the first embodiment and the second embodiment in the set value changing unit 31 and the other end set value output unit 32.

  The set value change unit 31 is a processing unit that acquires the change value of the other end set value input by the input unit 12 and rewrites the other end set value acquired by the other end information acquisition unit 31 to the change value.

  The other end set value output unit 32 is a processing unit that outputs the other end set value rewritten by the set value change unit 31 to the protection relay 10 at the other end.

  The processes in the set value changing unit 31 and the other end set value output unit 32 described above are performed by a processor such as a CPU.

  Next, the operation of each component will be described with reference to FIG. FIG. 8 is a flowchart showing the operation of the protection relay according to the second embodiment.

  The operator selects the other end set value displayed on the display unit 13 and inputs the change value of the other end set value through the input unit 12.

  The set value change unit 31 acquires the change value of the other end set value input by the input unit 12, and rewrites the other end set value acquired by the other end information acquisition unit 31 to the change value (step S301).

  The other end set value output unit 32 outputs the other end set value rewritten by the set value change unit 31 to the protection relay 10 at the other end (step S302).

  The other end set value output unit 32 may output the other end set value to the other end protection relay 10 set by the communication setting unit 22, or all the other end protection relays connected to the network 4. The other end settling value may be output for 10a, 10b, and 10c.

  The protection relay 10 at the other end receives the other end set value output from the other end set value output unit 32, and the received other end set value is set.

  The output of the other end settling value by the other end settling value output unit 32 may be a mirroring method in which output is automatically performed at a sampling interval or at a certain fixed time, or “Do you want to send it to the display unit 13?”. The output may be performed by causing the operator to operate the input unit 12.

  Further, the set value changing unit 31 may rewrite the other end set value to a different change value for each protection relay 10 at the other end, or set the other end set value to the same value for the plurality of other end protection relays 10. It may be rewritten as

  As described above, according to the protection relay according to the second embodiment, in addition to the effects obtained in the second embodiment, the set value of the protection relay 10 at the other end is changed from the protection relay at the other end. can do.

  As a result, the operational efficiency can be improved and the burden on the operator can be reduced.

  Further, since the other end settling value can be rewritten to the same value for the plurality of other protective relays 10, the operational efficiency can be further improved and the burden on the operator can be reduced.

(Fourth embodiment)
The configuration of the fourth embodiment will be described with reference to the drawings. The same parts as those in the first to third embodiments are denoted by the same reference numerals, and the description thereof is omitted. Hereinafter, a different part from 1st Embodiment thru | or 3rd Embodiment is demonstrated.

  The fourth embodiment is different from the first to third embodiments in that it further includes a settling value determination unit 41.

  FIG. 7 is a block diagram illustrating a configuration of a protection relay according to the fourth embodiment.

  The settling value determination unit 41 acquires the corresponding self-end settling value and the other end settling value among the self-end settling value acquired by the self-end information output unit 21 and the other end settling value acquired by the other end information acquisition unit 23, It is a processing unit that determines whether or not the acquired self-end settling value and the other end settling value are different.

  The processing in the settling value determination unit 41 described above is performed by a processor such as a CPU.

  Next, the operation of each component will be described with reference to FIG. FIG. 10 is a flowchart showing the operation of the protection relay according to the fourth embodiment.

  The settling value determination unit 41 acquires the corresponding self-end settling value and the other end settling value among the self-end settling value acquired by the self-end information output unit 21 and the other end settling value acquired by the other end information acquisition unit 23, It is determined whether or not the acquired self-end set value and the other end set value are different (step S401).

  Here, as an example of the corresponding self-end set value and the other end set value, the operating current value of the self-end protection relay 1 and the operation current value of the other-end protection relay 10 can be cited. A determination is made whether or not.

  When it is determined that the self-end setting value acquired by the settling value determination unit 41 is different from the other-end setting value (YES in step S401), the display unit 13 highlights the self-end setting value and the other-end setting value (step S401). S402).

  When it is not determined that the self-end set value acquired by the set value determination unit 41 is different from the other end set value (NO in step S401), no highlight display is performed (step S403).

  As described above, according to the protection relay according to the fourth embodiment, in addition to the effects obtained in the second embodiment, the self-end settling value and the other end settling value to be set to the same value are obtained. Since they are highlighted when they are different from each other, the operator can easily compare the settling value with the other end, and grasp the validity.

  In the first to fourth embodiments, the relay calculation unit 15 that performs each process, the self-end information output units 16 and 21, the communication setting unit 22, the other end information acquisition unit 23, and the set value change. The unit 31, the other end set value output unit 32, and the set value determination unit 41 may be stored in the storage unit 14 as a program.

  Although several embodiments of the present invention have been described, these embodiments have been presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other 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 equivalents thereof in the same manner as included in the scope and gist of the invention.

DESCRIPTION OF SYMBOLS 1 ... Self-end protection relay 2a, 2b ... Electric power system 3 ... Circuit breaker 4 ... Network 5 ... Transmission path 6a, 6b, 6c, 6d ... Current transformer 10a, 10b, 10c ... Other end protection relay 11 ... Communication part DESCRIPTION OF SYMBOLS 12 ... Input part 13 ... Display part 14 ... Memory | storage part 15 ... Relay operation part 16, 21 ... Own end information output part 22 ... Communication setting part 23 ... Other end information acquisition part 31 ... Set value change part 32 ... Other end set value output Unit 41 ... Setting value determination units 130a, 130b, 130c ... Screen display area

Claims (1)

A display unit having a plurality of screen display areas;
A self-end information output unit that outputs the self-end display information that is display information of the self-end protection relay to the display unit;
The display unit displays the self-end display information output by the self-end information output unit in time series for each screen display area , and the self-end display information includes an accident that occurred in a power system. Accident record, operation record of the self-protection relay, disturbance record indicating the time when disturbance of the current or voltage waveform of the power system occurred, time series in different screen display areas of the plurality of screen display areas, respectively Protection relay to be displayed .

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