JP6809107B2 - Adjustment device and adjustment method - Google Patents

Description

The present invention relates to an adjusting device and an adjusting method.

Conventionally, various techniques for stabilizing the electric power supplied from the distribution line have been proposed (see, for example, Patent Document 1). In this technology, the primary side of the series transformer is connected in series between the pole transformer and the output terminal on the secondary side (load side) of the pole transformer, and the output terminal is connected to the secondary side of the series transformer. A voltage regulator for adjusting the output voltage of is connected. The primary side of the series transformer is connected in parallel with the bypass switch, and when the bypass switch is on, current flows through the bypass switch, and when the bypass switch is off, current flows through the primary side of the series transformer.
Patent Document 1 JP-A-2005-341668

However, if the bypass switch is simply switched from off to on, the output voltage from the power supply output terminal 11 suddenly changes at the moment of switching, and as a result, the output voltage exceeds the appropriate range (101V ± 6V) or causes system disturbance. There is a possibility that it will happen.

In the first aspect of the present invention, a series transformer whose primary side is connected in series between the power supply and the power supply output terminal and a power supply output terminal which is connected to the secondary side of the series transformer and is connected via the series transformer. The voltage adjuster that adjusts the output voltage of the series transformer, the bypass switch that can switch whether to bypass at least one of the primary side and the secondary side of the series transformer, and the potential difference on the primary side of the series transformer are the reference. An adjusting device including a control unit for switching the bypass switch from off to on when the potential difference is less than the potential difference is provided.

In the second aspect of the present invention, the power output terminal is connected via the series transformer by the voltage adjusting unit connected to the secondary side of the series transformer in which the primary side is connected in series between the power supply and the power output terminal. A bypass switch that can switch between the voltage adjustment stage that adjusts the output voltage and whether or not to bypass at least one of the primary side and secondary side of the series transformer, and the potential difference on the primary side of the series transformer is the reference potential difference. An adjustment method is provided that includes a control step that switches from off to on when the value is less than.

The above outline of the invention does not list all the features of the present invention. Sub-combinations of these feature groups can also be inventions.

The adjusting device which concerns on this embodiment is shown. The state when the adjusting device is in the stop mode is shown. The state when the adjusting device is in the voltage compensation mode is shown. The state when the adjusting device is in the stop preparation mode is shown. The operation of the adjusting device is shown. An example of the configuration of the computer according to this embodiment is shown.

Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the inventions claimed in the claims. Also, not all combinations of features described in the embodiments are essential to the means of solving the invention.

FIG. 1 shows the adjusting device 1 according to the present embodiment together with the power supply 10. The adjusting device 1 adjusts the output voltage between the plurality of power supply output terminals 11 connected to the power supply 10 and outputs the output voltage from the power supply output terminals 11 (a), 11 (b), 11 (n). The adjusting device 1 includes one or more series transformers 12, a voltage adjusting unit 13, one or more bypass switches 14, and a control unit 15. The adjusting device 1 may further include a measuring unit 17.

The power source 10 may be an AC power source, and in the present embodiment, as an example, a voltage is converted from a high voltage distribution system of 6600 V, 60 Hz (or 50 Hz) to a low voltage distribution system of about 100 V, 60 Hz (or 50 Hz). It is a transformer to be supplied (a columnar transformer as an example). The power supply 10 may have three output terminals of u-phase, v-phase and o-phase.

The plurality of power output terminals 11 output power after voltage adjustment by the adjusting device 1. In this embodiment, as an example, the three power output terminals 11 (a), 11 (b), and 11 (n) output single-phase AC power. The voltage between at least one of the power output terminals 11 (a) and 11 (b) as the output terminal of the voltage line and the power output terminal 11 (n) as the output terminal of the neutral wire is adjusted by the adjusting device 1. May be done. The power output terminals 11 (a), 11 (b), and 11 (n) are connected to the u-phase, v-phase, and o of the power supply 10 via the low-voltage lines 110 (a), 110 (b), and 110 (n), respectively. It may be connected to the output terminal of the phase.

In one or more series transformers 12, the primary side, that is, the primary coil is connected in series to the low piezoelectric line 110 between the power supply 10 and the power output terminal 11, and the secondary side, that is, the secondary coil is connected to the voltage adjusting unit 13. Is connected. The transformer ratio of the series transformer 12 may be configured so that the primary side is higher than the secondary side, and may be, for example, primary side: secondary side = 10: 1 (or 5: 1). In the present embodiment, as an example, two series transformers 12 (a) and 12 (b) are provided on the low voltage lines 110 (a) and 110 (b), but even if only one of them is provided. Good. In the series transformer 12 (a) and the series transformer 12 (b), the secondary coils have the same orientation and the primary coils have opposite orientations, but the respective coils have different orientations. You may.

The voltage adjusting unit 13 adjusts the output voltage of the power supply output terminal 11 via each series transformer 12. For example, the voltage adjusting unit 13 may adjust the output voltage of the power supply output terminal 11 so as to be within the reference range (101 ± 6V as an example). The voltage adjusting unit 13 may include an inverter 130 and a power supply unit 131.

The inverter 130 adjusts the output voltage between the power supply output terminals 11 by outputting the current flowing through the secondary side of each series transformer 12. For example, the inverter 130 may be a single-phase inverter. The inverter 130 has two output terminals of u-phase and v-phase, and these u-phase and v-phase output terminals may be connected to the series transformers 12 (a) and 12 (b), respectively. The inverter 130 may be supplied with DC power from the power supply unit 131 described later. The switching frequency of the inverter 130 may be 20 kHz as an example.

The power supply unit 131 supplies power to the inverter 130. In the present embodiment, as an example, the power supply unit 131 receives power from the power source 10 and supplies power to the inverter 130, but is supplied from another power source (for example, a private power generation facility) different from the power source 10. Electric power may be supplied to the inverter 130. The power supply unit 131 may include a converter 1311 and a smoothing capacitor 1312.

The converter 1311 converts the AC power from the power source 10 into DC power and supplies it to the inverter 130. In the converter 1311, the input side (AC side) terminal is connected to the low voltage lines 110 (a) and 110 (b) on the upstream side of the series transformer 12, and the output side (DC side) terminal is connected to the inverter 130. You can. For example, the converter 1311 may supply DC power of about 400 to 500 V to the inverter 130.

The smoothing capacitor 1312 is connected between the output terminals of the converter 1311 and smoothes the DC power output from the converter 1311.

The voltage adjusting unit 13 is provided on the wiring connecting the low piezoelectric line 110 (a) or 110 (b) and the converter 1311, and the u-phase and v-phase output terminals of the inverter 130 and the series transformer 12 (a). , 12 (b) may have an LC filter circuit for current smoothing on at least one of the wirings.

One or a plurality of bypass switches 14 are connected so as to be able to switch whether or not to bypass the secondary side of the series transformer 12. For example, the bypass switch 14 may be connected in parallel with the secondary coil of the corresponding series transformer 12 for the wiring from the voltage adjusting unit 13 to the series transformer 12. In the present embodiment, as an example, one bypass switch 14 is connected in parallel with the secondary coils of the two series transformers 12 (a) and 12 (b), and these secondary coils can be short-circuited respectively. .. When the bypass switch 14 is provided on the secondary side in this way, a large current does not flow in the switch, so that a smaller bypass switch 14 can be used as compared with the case where the bypass switch 14 is provided on the primary side. Further, unlike the case where the bypass switch 14 is provided on the primary side, an appropriate power supply path is secured even in an emergency such as a momentary power failure.

The one or a plurality of bypass switches 14 may be mechanical switches, semiconductor switches, or a combination thereof. Unlike semiconductor switches, mechanical switches do not require cooling, and the standard state can be easily turned on, facilitating circuit design. Since the semiconductor switch has better responsiveness than the mechanical switch, it is possible to prevent a surge on the series transformer 12 and the like by immediately switching it to ON in the event of a momentary power failure or inverter runaway.

The control unit 15 controls each unit in the adjusting device 1. For example, the control unit 15 switches the bypass switch 14 from off to on in a state where the potential difference on the primary side of the series transformer 12 is less than the reference potential difference. Here, the potential difference less than the reference potential difference is, for example, a potential difference of 0 V excluding errors such as measurement and calculation.

The measuring unit 17 performs measurement for directly / indirectly detecting a state in which the potential difference on the primary side of the series transformer 12 is less than the reference potential difference. For example, the measuring unit 17 may measure the potential difference on the primary side of the series transformer 12. As an example, the measuring unit 17 has a voltage sensor (not shown) provided at both ends of the primary coil of the series transformer 12 (a) in the low piezoelectric line 110 (a) and a series in the low piezoelectric line 110 (b). A voltage sensor (not shown) provided before and after the primary coil of the transformer 12 (b) may be provided, and the potential difference of each primary coil may be calculated by these primary coils. The measuring unit 17 may supply the measurement result of the potential difference to the control unit 15.

The measuring unit 17 may supply the voltage values of the low piezoelectric lines 110 (a) and 110 (b) measured on the power output terminal 11 side of the series transformer 12 to the control unit 15. In this case, the measuring unit 17 may further supply the voltage value measured by the voltage sensor provided on the low piezoelectric line 110 (n) to the control unit 15.

According to the above adjusting device 1, the bypass switch 14 is switched from off to on when the potential difference on the primary side of the series transformer 12 is less than the reference potential difference, so that the output voltage from the power supply output terminal 11 changes at the moment of switching. It is possible to prevent sudden changes. Therefore, it is possible to prevent the output voltage from exceeding the appropriate range (101V ± 6V) or causing system disturbance. Further, since it is possible to prevent the output voltage from the inverter 130 from suddenly being applied to the bypass switch 14 at the moment of switching, the bypass switch 14 does not need to be enlarged from the viewpoint of preventing damage, and the bypass switch 14 is downsized. be able to.

Subsequently, the operation mode of the adjusting device 1 will be described. The adjusting device 1 may be set to any of a stop mode, a voltage compensation mode, and a stop preparation mode by the control unit 15. Details of these operation modes will be described in order.

FIG. 2 shows a state when the adjusting device 1 is in the stop mode. The stop mode is a mode in which the output voltage between the power output terminals 11 is not adjusted.

In the stop mode, the control unit 15 keeps the bypass switch 14 on. As a result, the secondary side of the series transformer 12 is short-circuited, and the current from the power supply 10 flows through the primary side of the series transformer 12 with almost no loss. Further, since the output terminals of the u-phase and v-phase of the inverter are short-circuited, the voltage adjusting unit 13 is not connected. Therefore, the voltage between the u-phase and o-phase output terminals of the power supply 10 and between the v-phase and o-phase output terminals (Vs_uo, Vs_vo) remains the same as the voltage between the power supply output terminals 11 (Vl_uo, Vl_vo). It becomes.

Further, the control unit 15 disables the voltage adjustment unit 13. For example, the control unit 15 may turn off the pulse signal of the control command applied to the inverter 130 and the converter 1311. As a result, the loss generated in these conversion units is reduced, and power can be supplied to the low-voltage distribution system with high efficiency. Further, the life of the adjusting device 1 is extended. The converter 1311 does not have to be disabled.

FIG. 3 shows a state when the adjusting device 1 is in the voltage compensation mode. The voltage compensation mode is a mode for adjusting the output voltage.

In the voltage compensation mode, the control unit 15 keeps the bypass switch 14 off to connect the voltage adjustment unit 13, and from the voltage adjustment unit 13 to keep the output voltage outside the reference range within the reference range. The secondary current output to the series transformer 12 is controlled according to the output voltage.

For example, the control unit 15 converts the voltage of each power output terminal 11 measured by the measurement unit 17 into a voltage effective value and a voltage phase. Further, the control unit 15 sets the target voltage held inside (for example, the upper and lower limit values of the reference range (101 ± 6V) or 101V) and the effective value of the measured voltage. From, the voltage deviation (VΔ) to be adjusted is calculated. The control unit 15 controls the voltage adjustment unit 13 (for example, the inverter 130 and the converter 1311) so that the primary side voltage of the series transformer 12 becomes a voltage corresponding to the voltage deviation. For example, if the transformation ratio of the series transformer 12 is primary side: secondary side = α: 1, the control unit 15 determines the inverter 130 and the converter so that the output voltage (Vinv) of the inverter 130 becomes the voltage deviation / α. A control command is given to 1311. The control unit 15 may make the voltage applied to the low piezoelectric line 110 (a) by the series transformer 12 in phase with the voltage phase between the low piezoelectric lines 110 (a) and 110 (n). The control unit 15 may set the phase of the voltage applied to the low piezoelectric line 110 (b) by the series transformer 12 to be 180 ° inverted.

As a result, a voltage with a voltage deviation (VΔ) is generated on the primary side of the series transformer 12. As a result, a voltage of voltage deviation (VΔ) is applied to the voltage (Vs_uo, Vs_vo) between the u-phase and o-phase output terminals of the power supply 10 and between the v-phase and o-phase output terminals. The voltage between the power output terminals 11 becomes large / small.

FIG. 4 shows a state when the adjusting device 1 is in the stop preparation mode. The stop preparation mode is a mode for preparing to shift from the voltage compensation mode to the stop mode. In the stop preparation mode, the potential difference on the primary side of the series transformer 12 becomes less than the reference potential difference before the bypass switch 14 is switched from off to on.

For example, the control unit 15 continues to keep the bypass switch 14 off from the voltage compensation mode and interconnects the voltage adjustment unit 13. Further, the control unit 15 reduces the potential difference on the primary side to less than the reference potential difference by the voltage adjusting unit 13 based on the measurement result by the measuring unit 17 regarding the potential difference on the primary side of the series transformer 12.

As a result, the output voltage from the power supply output terminal 11 becomes substantially equal to the output voltage when the bypass switch 14 is turned on later. Therefore, the output voltage from the power supply output terminal 11 is prevented from suddenly changing at the moment of switching the bypass switch 14, and the output voltage may exceed the appropriate range (101V ± 6V) or system disturbance may occur. Is prevented.

Further, the voltage applied to the secondary side of the series transformer 12 is substantially equal to the voltage when the bypass switch 14 is turned on later. As a result, the output voltage of the inverter 130 is prevented from being suddenly applied to the bypass switch 14 at the moment of switching, so that the bypass switch 14 can be miniaturized.

FIG. 5 shows the operation of the adjusting device 1. When the adjusting device 1 starts operation, the control unit 15 sets the adjusting device 1 to the stop mode (step S11). For example, the control unit 15 turns on the bypass switch 14 and disables the inverter 130 and the converter 1311.

Next, the control unit 15 determines whether or not the output voltage between the power supply output terminals 11 is out of the second target voltage range based on the measurement result by the measurement unit 17 (step S13). For example, the control unit 15 is between the effective value of the voltage between the low piezoelectric lines 110 (a) and 110 (n) measured by the measuring unit 17 and the low piezoelectric lines 110 (b) and 110 (n). You may monitor whether the effective value of the voltage is out of the second target voltage range. Here, the second target voltage range may be within a reference range (101 ± 6V as an example), and in this embodiment, it is the same range as the reference range as an example.

When it is determined in step S13 that the output voltage is within the second target voltage range (S13; No), the control unit 15 returns the process to S13 and maintains the stop mode.

When it is determined in step S13 that the output voltage is out of the second target voltage range (S13; Yes), the control unit 15 shifts the adjusting device 1 to the voltage compensation mode (step S15). The process of step S15 is an example of the voltage adjustment stage.

For example, the control unit 15 switches the bypass switch 14 from on to off to connect the voltage adjustment unit 13. As a result, the bypass switch 14 is switched off when the output voltage is out of the second target voltage range while the bypass switch 14 is on.

Further, the control unit 15 adjusts the voltage on the primary side of the series transformer 12 by controlling the secondary current output from the voltage adjusting unit 13 to each series transformer 12 according to the output voltage. In the present embodiment, as an example, the control unit 15 adjusts the voltage on the primary side of the series transformer 12 so that the output voltage outside the second target voltage range (reference range) is within the first target voltage range. Here, the first target voltage range may be within the reference range, and is, for example, a range narrower than the second target voltage range included in the second target voltage range (101 ± 4V as an example).

The control unit 15 disables the voltage adjustment unit 13 when the output voltage is within the allowable voltage range (for example, the same range as the second target voltage range), and the output voltage becomes the first You may wait for it to fall within the target voltage range of.

Next, the control unit 15 determines whether or not the output voltage between the power supply output terminals 11 is within the first target voltage range based on the measurement result by the measurement unit 17 (step S17).

When it is determined in step S17 that the output voltage is out of the first target voltage range (S17; No), the control unit 15 returns the process to step S15 and maintains the voltage compensation mode.

When it is determined in step S17 that the output voltage is within the first target voltage range (S17; Yes), the control unit 15 shifts the adjusting device 1 to the stop preparation mode (step S19). For example, the control unit 15 continuously keeps the bypass switch 14 off and connects the voltage adjustment unit 13, and adjusts the voltage based on the measurement result by the measurement unit 17 regarding the potential difference on the primary side of the series transformer 12. The unit 13 reduces the potential difference on the primary side to less than the reference potential difference. As an example, the control unit 15 may control the output voltage from the inverter 130 to approximately 0V so that the potential difference on the primary side of the series transformer 12 is 0V excluding an error. Further, the control unit 15 may gradually reduce the potential difference on the primary side to less than the reference potential difference by the voltage adjusting unit 13.

Next, the control unit 15 determines whether or not the potential difference on the primary side of each series transformer 12 is less than the reference potential difference based on the measurement result by the measurement unit 17 (step S21). For example, the control unit 15 may determine whether the potential difference has become approximately 0V.

When it is determined in step S21 that the potential difference is not less than the reference potential difference (step S21; No), the control unit 15 returns the process to step S19 and maintains the stop preparation mode.

When it is determined in step S21 that the potential difference is less than the reference potential difference (step S21; Yes), the control unit 15 switches the bypass switch 14 from off to on to disconnect the voltage adjusting unit 13 (step S21; Yes). Step S23), the process returns to step S11. As a result, the bypass switch 14 is switched on according to the fact that the output voltage is within the first target voltage range (step S17; Yes) when the bypass switch 14 is off. The above process in step S23 is an example of the control stage.

In the above operation, the adjusting device 1 may end the operation when it receives a command to end the operation.

In the above embodiment, it has been described that one or more bypass switches 14 are provided so as to be able to switch whether or not to bypass the secondary side of the series transformer 12, but the primary side of the series transformer 12 and It may be connected so that it can be switched whether to bypass at least one of the secondary sides. For example, when the bypass switch 14 is connected so that the primary side can be switched, the low voltage line 110 between the power supply 10 and the power supply output terminal 11 is connected in parallel with the primary coil of the corresponding series transformer 12. You can. When the bypass switch 14 is provided on the primary side, unlike the case where it is provided on the secondary side, no current flows through the series transformer 12 when it is on, so that the loss can be reduced accordingly.

Further, although it has been described that the measuring unit 17 measures the potential difference on the primary side of the series transformer 12 to detect the state where the potential difference on the primary side is less than the reference potential difference, the potential difference on the secondary side is measured. By detecting a state in which the potential difference on the secondary side is less than the other reference potential difference, a state in which the potential difference on the primary side is less than the reference potential difference may be detected. Further, the measuring unit 17 measures the current value on the primary side or the secondary side with a current sensor and detects a state in which the current value is less than the reference current value, so that the potential difference on the primary side becomes less than the reference potential difference. May be detected.

Further, although the control unit 15 has described that the voltage adjusting unit 13 reduces the potential difference on the primary side to less than the reference potential difference and switches the bypass switch 14 from off to on, the alternating current applied to the primary side of the series transformer 12 has been described. The bypass switch 14 may be switched from off to on at the timing when the voltage becomes lower than the reference potential (for example, the timing of zero cross). For example, the control unit 15 detects the period and phase of the AC voltage applied to the primary side of the series transformer 12 from the measurement result of the measurement unit 17, and the bypass switch 14 is turned on at the timing when the AC voltage becomes less than the reference potential difference. The switching timing may be controlled so as to be. When performing such control, it is preferable to use a semiconductor switch having excellent responsiveness as the bypass switch 14.

Further, it has been described that the inverter 130 has u-phase and v-phase output terminals, and the series transformers 12 (a) and 12 (b) are connected to the u-phase and v-phase output terminals of the inverter 130, respectively. However, the inverter 130 has three output terminals of u-phase, v-phase and o-phase, the output terminals of u-phase and o-phase are connected to the series transformer 12 (a), and the output terminals of v-phase and o-phase are connected. May be connected to the series transformer 12 (b). In this case, the voltage adjusting unit 13 can independently adjust the output voltages of the power supply output terminals 11 (a) and 11 (b).

It should be noted that various embodiments of the present invention may be described with reference to flowcharts and block diagrams, wherein the block serves (1) the stage of the process in which the operation is performed or (2) the role of performing the operation. It may represent a section of the device it has. Specific stages and sections are implemented by dedicated circuits, programmable circuits supplied with computer-readable instructions stored on computer-readable media, and / or processors supplied with computer-readable instructions stored on computer-readable media. You can. Dedicated circuits may include digital and / or analog hardware circuits, and may include integrated circuits (ICs) and / or discrete circuits. Programmable circuits are memory elements such as logical AND, logical OR, logical XOR, logical NAND, logical NOR, and other logical operations, flip-flops, registers, field programmable gate arrays (FPGA), programmable logic arrays (PLA), etc. May include reconfigurable hardware circuits, including, etc.

The computer readable medium may include any tangible device capable of storing instructions executed by the appropriate device, so that the computer readable medium having the instructions stored therein is specified in a flowchart or block diagram. The product will be equipped with instructions that can be executed to create a means for performing the operation. Examples of computer-readable media may include electronic storage media, magnetic storage media, optical storage media, electromagnetic storage media, semiconductor storage media, and the like. More specific examples of computer-readable media include floppy® disks, diskettes, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), Electrically erasable programmable read-only memory (EEPROM), static random access memory (SRAM), compact disc read-only memory (CD-ROM), digital versatile disc (DVD), Blu-ray (RTM) disc, memory stick, integrated A circuit card or the like may be included.

Computer-readable instructions are assembler instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state-setting data, or object-oriented programming such as Smalltalk, JAVA®, C ++, etc. Contains either source code or object code written in any combination of one or more programming languages, including languages and traditional procedural programming languages such as the "C" programming language or similar programming languages. Good.

Computer-readable instructions are applied locally or to a processor or programmable circuit of a general purpose computer, special purpose computer, or other programmable data processing device, or to a wide area network (WAN) such as the local area network (LAN), the Internet, etc. ) May be executed to create a means for performing the operation specified in the flowchart or block diagram. Examples of processors include computer processors, processing units, microprocessors, digital signal processors, controllers, microcontrollers and the like.

FIG. 6 shows an example of a computer 2200 in which a plurality of aspects of the present invention may be embodied in whole or in part. The program installed on the computer 2200 can cause the computer 2200 to function as an operation or one or more sections of the device according to an embodiment of the invention, or the operation or the one or more. Sections can be run and / or the computer 2200 can be run a process according to an embodiment of the invention or a stage of such process. Such a program may be run by the CPU 2212 to cause the computer 2200 to perform certain operations associated with some or all of the blocks in the flowcharts and block diagrams described herein.

The computer 2200 according to this embodiment includes a CPU 2212, a RAM 2214, a graphic controller 2216, and a display device 2218, which are interconnected by a host controller 2210. The computer 2200 also includes input / output units such as a communication interface 2222, a hard disk drive 2224, a DVD-ROM drive 2226, and an IC card drive, which are connected to the host controller 2210 via the input / output controller 2220. There is. The computer also includes legacy input / output units such as the ROM 2230 and keyboard 2242, which are connected to the input / output controller 2220 via an input / output chip 2240.

The CPU 2212 operates according to the programs stored in the ROM 2230 and the RAM 2214, thereby controlling each unit. The graphic controller 2216 acquires the image data generated by the CPU 2212 in a frame buffer or the like provided in the RAM 2214 or itself so that the image data is displayed on the display device 2218.

The communication interface 2222 communicates with other electronic devices via the network. The hard disk drive 2224 stores programs and data used by the CPU 2212 in the computer 2200. For example, it is determined whether or not the output voltage is within the target voltage range from the voltage of each power output terminal 11 and the primary or secondary side voltage of the series transformer 12 acquired by the measuring unit 17, and the stored data thereof. A program for performing processing and calculation processing of a command to the inverter 130 from the deviation from the target voltage range is stored in the hard disk drive 2224. The DVD-ROM drive 2226 reads the program or data from the DVD-ROM 2201 and provides the program or data to the hard disk drive 2224 via the RAM 2214. For example, in the case of a program that depends on the architecture such as C language, it can be processed by a program that is relatively independent of the architecture such as JAVA (registered trademark) via RAM 2214, and versatility can be obtained. The IC card drive reads programs and data from the IC card and / or writes programs and data to the IC card. It should be noted that the invention is not bound by the above analogy.

The ROM 2230 contains a boot program or the like executed by the computer 2200 at the time of activation, and / or a program depending on the hardware of the computer 2200. The input / output chip 2240 may also connect various input / output units to the input / output controller 2220 via a parallel port, serial port, keyboard port, mouse port, and the like.

The program is provided by a computer-readable medium such as a DVD-ROM 2201 or an IC card. The program is read from a computer-readable medium, installed on a hard disk drive 2224, RAM 2214, or ROM 2230, which is also an example of a computer-readable medium, and executed by the CPU 2212. The information processing described in these programs is read by the computer 2200 and provides a link between the program and the various types of hardware resources described above. The device or method may be configured to implement the manipulation or processing of information in accordance with the use of computer 2200.

For example, when communication is executed between the computer 2200 and an external device, the CPU 2212 executes a communication program loaded in the RAM 2214, and performs communication processing on the communication interface 2222 based on the processing described in the communication program. You may order. Under the control of the CPU 2212, the communication interface 2222 reads and reads transmission data stored in a transmission buffer processing area provided in a recording medium such as a RAM 2214, a hard disk drive 2224, a DVD-ROM 2201, or an IC card. The data is transmitted to the network, or the received data received from the network is written to the reception buffer processing area or the like provided on the recording medium.

Further, the CPU 2212 causes the RAM 2214 to read all or necessary parts of a file or database stored in an external recording medium such as a hard disk drive 2224, a DVD-ROM drive 2226 (DVD-ROM2201), or an IC card. Various types of processing may be performed on the data on the RAM 2214. The CPU 2212 then writes back the processed data to an external recording medium.

Various types of information, such as various types of programs, data, tables, and databases, may be stored on recording media and processed. The CPU 2212 describes various types of operations, information processing, conditional judgment, conditional branching, unconditional branching, and information retrieval described in various parts of the present disclosure with respect to the data read from the RAM 2214, and is specified by the instruction sequence of the program. Various types of processing may be performed, including / replacement, etc., and the results are written back to RAM 2214. Further, the CPU 2212 may search for information in a file, a database, or the like in the recording medium. For example, when a plurality of entries each having an attribute value of the first attribute associated with the attribute value of the second attribute are stored in the recording medium, the CPU 2212 specifies the attribute value of the first attribute. Search for an entry that matches the condition from the plurality of entries, read the attribute value of the second attribute stored in the entry, and associate it with the first attribute that satisfies the predetermined condition. The attribute value of the second attribute obtained may be acquired.

The program or software module described above may be stored on a computer 2200 or on a computer readable medium near the computer 2200. Also, a recording medium such as a hard disk or RAM provided within a dedicated communication network or a server system connected to the Internet can be used as a computer-readable medium, thereby providing the program to the computer 2200 over the network. To do.

Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. It will be apparent to those skilled in the art that various changes or improvements can be made to the above embodiments. It is clear from the description of the claims that such modified or improved forms may also be included in the technical scope of the present invention.

The order of execution of operations, procedures, steps, steps, etc. in the devices, systems, programs, and methods shown in the claims, specification, and drawings is particularly "before" and "prior to". It should be noted that it can be realized in any order unless the output of the previous process is used in the subsequent process. Even if the scope of claims, the specification, and the operation flow in the drawings are explained using "first", "next", etc. for convenience, it means that it is essential to carry out in this order. It's not a thing.

1 regulator, 10 power supply, 11 power supply output terminal, 12 series transformer, 13 voltage regulator, 14 bypass switch, 15 control unit, 17 measurement unit, 110 low piezoelectric line, 130 inverter, 131 power supply unit, 1311 converter, 1312 Smoothing capacitor, 2200 computer, 2201 DVD-ROM, 2210 host controller, 2212 CPU, 2214 RAM, 2216 graphic controller, 2218 display device, 2220 input / output controller, 2222 communication interface, 2224 hard disk drive, 2226 DVD-ROM drive, 2230 ROM, 2240 input / output chip, 2242 keyboard

Claims (14)

A series transformer with the primary side connected in series between the power supply and the power supply output terminal,
A voltage adjusting unit connected to the secondary side of the series transformer and adjusting the output voltage of the power supply output terminal via the series transformer.
A bypass switch capable of switching whether to bypass at least one of the primary side and the secondary side of the series transformer, and
A control unit that switches the bypass switch from off to on when the potential difference on the primary side of the series transformer is less than the reference potential difference.
An adjusting device equipped with. The adjusting device according to claim 1, wherein the control unit reduces the potential difference on the primary side of the series transformer to less than the reference potential difference by the voltage adjusting unit before switching the bypass switch from off to on. The adjusting device according to claim 2, wherein the control unit gradually reduces the potential difference on the primary side of the series transformer to less than the reference potential difference by the voltage adjusting unit. The power source is an AC power source.
Wherein, at the timing when the AC voltage applied to the primary side of the series transformer is less than said reference potential difference, switching on the bypass switch from off adjusting apparatus as claimed in claim 1. The adjusting device according to any one of claims 1 to 4, wherein the control unit switches the bypass switch from off to on in a state where the potential difference on the primary side of the series transformer is 0 V excluding an error. The adjusting device according to any one of claims 1 to 5, further comprising a measuring unit for measuring a potential difference on the primary side of the series transformer. The control unit according to any one of claims 1 to 6 for switching the bypass switch on according to the fact that the output voltage is within the first target voltage range when the bypass switch is off. The adjusting device described. The adjusting device according to claim 7, wherein the control unit switches the bypass switch off in response to the output voltage being out of the second target voltage range while the bypass switch is on. The adjusting device according to claim 8, wherein the first target voltage range is included in the second target voltage range and is narrower than the second target voltage range. The voltage adjusting unit
An inverter that outputs the current flowing to the secondary side of the series transformer,
A power supply unit that supplies power to the inverter and
The adjusting device according to any one of claims 1 to 9. The power source is an AC power source.
The adjusting device according to claim 10, wherein the power supply unit converts AC power from the power source into DC power and supplies the AC power to the inverter. The adjusting device according to claim 10, wherein the power supply unit supplies power from another power source different from the power source to the inverter. The adjusting device according to any one of claims 1 to 12, wherein the power supply is a transformer that converts a voltage from a high-voltage distribution system to a low-voltage distribution system. A voltage adjustment step in which the output voltage of the power output terminal is adjusted via the series transformer by a voltage adjusting unit connected to the secondary side of a series transformer in which the primary side is connected in series between the power supply and the power output terminal. When,
A bypass switch that can switch whether to bypass at least one of the primary side and the secondary side of the series transformer is turned on from off when the potential difference on the primary side of the series transformer is less than the reference potential difference. Control stage to switch to, and
Adjustment method with.

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