JP5317797B2 - Distributed power shutoff system and supervisory control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reliably block a distributed power supply leading to a failure in a host system, in a power system in which a large number of distributed power supplies are interlocked. <P>SOLUTION: A distributed power supply block system 1 includes a power system 2, a monitor control system 3 and a distributed power supply control system 4. The power system 2 includes a power transmission end substation, a power transmission cable, a power receiving end substation and a power distribution cable. The power system is a series of systems which conduct power conversion, power transmission and power distribution for supplying power to the power receiving equipment of customers. The monitor control system 3 outputs instruction for disconnecting a solar power generation apparatus PV (distributed power source) to the distributed power supply control system 4, according to the open/close state of a breaker CB and a disconnector LS, each provided to the power transmission cable and to an operation state of a protective device Ry. The distributed power supply control system 4 normally transmits a control signal unique to the solar power generation apparatus PV via the power distribution cable W2; and when receiving a disconnection signal from the monitor control system 3, the distributed power supply control system interrupts the transmission of the control signal to disconnect the solar power generation apparatus PV. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a system that automatically shuts off a distributed power source such as a solar power generation device connected to a distribution line in response to a failure that has occurred in a host system such as a substation.

The following are the main methods for automatically shutting off / transferring a distributed power source such as a photovoltaic power generation facility connected to a distribution line when the system side is abnormal.
(1) An abnormal state on the system side is detected and automatically shut down by a change in the amount of electricity at the connection point with the distribution system of the distributed power source.
(2) When a failure occurs in the distribution system, transfer is interrupted by failure information output from the distribution line protection device.
Patent Document 1 discloses a system in which the stop of energization of commercial power is easily detected on the consumer side, and the consumer side can be reliably and automatically disconnected from the commercial power supply system. Patent Document 2 discloses an example of a method for disconnecting a distributed power source.

JP-A-5-115121 JP 2008-172897 A

  Among the above prior arts, in (1), the amount of power or voltage is used as a condition for determining a system side abnormality. In (2), although the distribution line failure and the automatic reclosing associated therewith are taken into account, the substation where the distribution line is generally drawn out as a criterion for the failure of the upper system such as a substation Is used to reduce the bus voltage.

  For this reason, in a distribution system in which a large number of photovoltaic power generation facilities are connected, when the amount of power generated by them and the load supplied from the bus are balanced, the voltage of the bus does not decrease, The shutdown command for the equipment cannot be issued.

  In such a state, the failure point may be left in a charged state, and it may hinder the recovery operation of the host system. Furthermore, since the photovoltaic power generation facility does not have a load following capability, there is a concern that electricity with reduced quality may be delivered to consumers due to output fluctuations / load fluctuations of the power generation facility.

  The present invention has been made in view of the above problems, and its main purpose is to reliably shut off a distributed power source that leads to a failure of a higher system in a power system in which a large number of distributed power sources are interconnected. is there.

In order to solve the above problems, the present invention provides a distributed power shutoff system, a predetermined range of the switchgear and the power line for performing open circuit and closing of the distribution line power lines you carry power to a protection device for detecting faults in the previous SL power line, connection configuration data of the switchgear and the range stored in advance, obtains a close signal indicating a closed circuit by the closing device from the switchgear, the failure from the protection device Whether or not the distribution line has received power conveyance from the failure range detected by the protection device of the power line based on the connection configuration data, the closing signal, and the failure signal. And a monitoring control device that issues a disconnection instruction of a distributed power source connected to the distribution line when receiving power transfer, and the monitoring control device is configured so that the distribution line has the failure. In determining whether or not received a power carrier from circumference to identify a path for conveying power from said connection configuration data and the close signal actually the distribution lines of the power line, the from the fault signal A failure range is specified, and it is determined whether or not the distribution line is connected to the failure range through the route.

According to this configuration, when a failure occurs in the power system, the distributed power source of the distribution line that has received power transfer from the failure range is disconnected, so the distributed power source that affects the failure range of the upper system can be removed. It can be reliably shut off. The monitoring control device in the claims corresponds to the monitoring control system 3 in the embodiment. The connection configuration data is data indicating the system state of the power line, the position of the switchgear provided on the power line, and the range of the power system where the protection device detects a failure.
In addition, according to this configuration, the power transfer route at that time is specified, and the distributed power source of the distribution line connected to the failure range is disconnected on the route, so that the distribution that affects the failure range of the upper system is affected. The mold power supply can be shut off reliably.

The present invention is also a distributed power shut-off system, wherein the monitoring and control device inputs the closing signal of each switch and the failure signal of each protection device, and solves the distributed power connected to the distribution line. A determination circuit that outputs a disconnection signal indicating that a column instruction should be issued, and the determination circuit detects a closing signal of the switchgear provided between the range and the distribution line and a failure in the range. An AND circuit that inputs a failure signal of the protection device to be detected and outputs a logical product of the two signals as the disjunction signal is included.
According to this configuration, when a switching device is provided between a range in which the protective device detects a failure and a distribution line that receives power, the protective device detects the failure in the range, and the switching device A disconnect signal is output when the device is closed. According to this, the distributed power source can be disconnected only when the distributed power source of the distribution line actually affects the failure range of the upper system.

Further, the present invention is a distributed power shutoff system, wherein the determination circuit inputs a plurality of ranges of failure signals connected to the distribution line, and performs a logical sum of the plurality of failure signals as the disconnection signal. As an OR circuit that outputs as a feature.
According to this configuration, when a plurality of ranges are connected to the distribution line, a disconnection signal is output when the protection device detects a failure in at least one range. According to this, when the distributed power source of the distribution line has an influence even in one failure range, the distributed power source can be disconnected.

Further, the present invention is a distributed power shut-off system, and corresponds to a case where a control signal for turning on the distributed power is normally transmitted to a distribution line and a disconnection instruction is received from the monitoring control device. A distributed power supply control device for stopping transmission of a control signal to the distribution line is further provided.
According to this configuration, normally, by stopping the transmission of the control signal to the distribution line, the distributed power source connected to the distribution line can be safely and reliably disconnected. Note that the distributed power supply control device in the claims corresponds to the distributed power supply control system 4 in the embodiment.

The present invention includes a monitoring control equipment. In addition, the problems disclosed by the present application and the solutions thereof will be clarified by the description of the mode for carrying out the invention and the drawings.

  According to the present invention, in a power system in which a large number of distributed power sources are interconnected, it is possible to reliably shut off the distributed power sources that lead to failure of the host system.

1 is a diagram illustrating a configuration of a distributed power shutoff system 1. FIG. A diagram showing a determination circuit for outputting whether the distributed power to the distribution line W2 when a failure on position lineage has occurred to transfer trip. It is a figure which shows the range of the failure protection apparatus from which a solar power generation device is disconnected in an individual power receiving form. It is a figure which shows the range of the protection apparatus of the failure where a solar power generation device is disconnected in a power transmission line 1 line power receiving form. It is a figure which shows the range of the failure protection apparatus from which a solar power generation device is disconnected in a transmission line 1 line and 1 transformer stop form.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. A distributed power shutoff system according to an embodiment of the present invention solves a distributed power supply of a distribution line that receives power from the power system based on a closing signal of a switching device and a failure signal of a protection device in the power system. It is something to be lined up.

For the power receiving end side substation, a disconnection signal of the distributed power source is created using the failure detection signal output from the substation and the transmission line protection device and the “on / off” condition of the switchgear.
For the power transmission side substation, power transmission based on the power line outlet switchgear, grid connection information such as system transformer primary and secondary side switchgear, and failure detection information output from various protection devices Create a disconnection signal for a distributed power source due to a failure of a host system such as an end-side substation or a transmission line.

  In addition, the failure detected by the substation protection device or the power transmission line protection device, which is a target for creating a disconnection signal for a distributed power source such as a solar power generation device, includes the following. First, substation-related failures include transformer major faults, transformer shorts, power receiving shorts / ground faults, 6 kV bus shorts / ground faults, 6 kV bus voltage drop, power station power station blackouts, and the like. Next, transmission line related failures include transmission line short circuit / ground fault, transmission line phase loss, transmission line voltage drop, and the like. Distribution line-related failures include distribution line short-circuits and ground faults.

≪System configuration and overview≫
FIG. 1 is a diagram showing a configuration of a distributed power shutoff system 1. The distributed power cutoff system 1 includes a power system 2, a monitoring control system 3, and a distributed power control system 4. The power system 2 includes a power transmission end side substation, a transmission line, a power receiving end side substation, and a distribution line, and is a series of systems that perform power transformation, power transmission, and power distribution in order to supply power to a power receiving facility of a consumer. The supervisory control system 3 issues an instruction to disconnect the distributed power source to the distributed power source control system 4 in accordance with the open / close state of the circuit breaker and disconnector provided in the power transmission line and each bus and the operating state of the protection device. . In response to the disconnection instruction from the supervisory control system 3, the distributed power supply control system 4 stops transmission of the control signal to the corresponding distribution line.
Hereinafter, the distributed power shutoff system 1 will be described in detail.

The electric power system 2 is divided into a No. 1 system and a No. 2 system. In the No. 1 system, a power transmission bus A1, a power transmission line L1, a power receiving bus B1, a transformer Tr1, and a 6 kV bus C1 are connected as power lines, and each distribution line W1 is connected to the 6 kV bus C1. The protective device RyS1 is installed corresponding to the power transmission bus A1, detects a mechanical failure or an overcurrent in the range of the power transmission bus A1, and operates as a relay . Similarly, other protective devices also detect mechanical failures and overcurrents within their jurisdiction and operate as relays. The protection device RyLs1 and the circuit breaker CBS1 are installed on the power transmission end side of the transmission line L1, and the protection device RyLr1 and the circuit breaker CB11 are installed on the power reception end side of the transmission line L1. The protective device Ry11 is installed corresponding to the power receiving bus B1, and the protective device RyTr1 is installed corresponding to the transformer Tr1. A protection device Ry21 and a circuit breaker CB21 are installed corresponding to the 6 kV bus C1. Each distribution line W1 is also provided with a circuit breaker. The same applies to the No. 2 system. In addition, the photovoltaic power generation apparatus PV is connected to the distribution line W2, and the circuit breaker and the protection apparatus RyF are installed corresponding to each distribution line W2.

  The circuit breaker CBS0 opens and closes between the power transmission buses A1 and A2 as a communication between the first system and the second system. The disconnector LS10 opens and closes between the power receiving bus B1 and B2. Circuit breaker CB20 opens and closes between 6 kV bus C1 and C2. The circuit for supplying power from the power transmission side substation to the distribution lines W1 and W2 is changed by opening and closing the circuit breakers CBS0 and CB20 and the disconnector LS10. In other words, the distributed power sources connected to the distribution lines W1 and W2 are disconnected. Circuit breakers and protective devices that trigger

  The supervisory control system 3 acquires on / off signals (closed signal) of each circuit breaker and disconnector and relay operation signal (failure signal) of the protective device, and solves the distributed power source connected to the distribution line W1 or W2 by the judgment circuit. It is determined whether or not to be lined up, and when the line is to be lined off, the line breaking instruction is issued to the distributed power supply control system 4. The supervisory control system 3 includes the power line system state such as the transmission line L1, the position of the circuit breaker CB and the disconnector LS provided on the power line, and the range of the power system 2 where the protection device Ry detects a failure. It is assumed that the connection configuration data indicating is stored.

  The distributed power supply control system 4 normally transmits a unique control signal (distribution line carrier signal) for the distributed power supply via the distribution lines W1 and W2 to turn on the distributed power supply, but the supervisory control system 3 When a disconnection instruction is received, the transmission of the control signal to the corresponding distribution line W1 or W2 is interrupted to disconnect the distributed power source connected to the distribution line W1 or W2.

<< Configuration and operation of judgment circuit >>
FIG. 2 is a diagram illustrating a determination circuit that outputs whether or not the distributed power source connected to the distribution line W2 is interrupted when a failure occurs in the host system. As shown in FIG. 1, a distribution line W2 connected to a distributed power supply device such as a solar power generation device PV is drawn from a host system such as a substation. When a failure occurs in the upper system, the monitoring control system 3 determines whether or not the distribution line W2 is connected to the failure range of the power system 2 using the determination circuit D, and disconnects according to the determination result. An instruction is issued, and the distributed power supply control system 4 receives the disconnection instruction and transfers and blocks the corresponding distributed power supply apparatus.

The determination circuit D functions as follows.
(1) For the receiving end side substation, the failure detection signal output from the protection device for the transmission line, transformer and bus and the switching terminals such as the receiving end, the primary and secondary circuit breakers of the transformer, etc. Using the on / off state, it is determined whether or not the distributed power source connected to the distribution line W2 should be disconnected.
(2) For the power transmission side substation, based on the on / off status of the power line outlet switchgear, system transformer primary / secondary side switchgear, and failure detection signals output from various protection devices Then, it is determined whether or not the distributed power source connected to the distribution line W2 should be disconnected due to the failure of the upper system such as the power transmission side substation or the transmission line.

The determination circuit D based on the above (1) and (2) will be described below.
As shown in FIG. 2, the determination circuit D includes input lines for “ON” signals (closed signals) from the respective circuit breakers CB and disconnectors LS, and input lines for relay operation signals (failure signals) from the respective protection devices Ry. And an AND circuit that outputs a logical product of signals of each input line and an OR circuit that outputs a logical sum of signals of each input line. The “ON” signal indicates that the bus or power transmission line is closed, and power can be conveyed through the path. The relay operation signal indicates that a mechanical failure or overcurrent has occurred within the jurisdiction range of the protection device Ry. Based on the “ON” signal and the relay operation signal, each circuit outputs a disconnection signal indicating that the distributed power source connected to the distribution line W2 is to be disconnected.

  The circuits D1 to D5 output a signal corresponding to a failure that has occurred on the route from the power transmission side substation to the No. 2 transmission line L2 (hereinafter simply expressed as “output a failure signal”). ). The circuit D1 ANDs the signals of the protection device RyS1 and the circuit breaker CBS0 to output a failure signal in the first system of the power transmission side substation when the circuit breaker CBS0 is on. The circuit D2 ORs the output signal of the circuit D1 and the signal of the protection device RyS2, thereby outputting a failure signal in the No. 1 system or No. 2 system in the power transmission end side substation. The circuit D3 ANDs the output signal of the circuit D2 and the signal of the circuit breaker CBS2, thereby outputting a failure signal of the power transmission side substation when the circuit breaker CBS2 is on. The circuit D4 outputs a failure signal in the path from the power transmission end side substation to the power transmission line L2 by ORing the output signal of the circuit D3 and the signals of the protection devices RyLs2 and RyLr2. The circuit D5 ANDs the output signal of the circuit D4 and the signal of the circuit breaker CB12 to output a failure signal in the path from the power transmission end side substation to the power transmission line L2 when the circuit breaker CB12 is on.

  The circuits D6 to D11 output a failure signal in the path from the power transmission end side substation to the No. 1 system transformer Tr1. The circuit D6 ANDs the signals of the protection device RyS2 and the circuit breaker CBS0 to output a failure signal in the second system of the power transmission side substation when the circuit breaker CBS0 is on. The circuit D7 ORs the output signal of the circuit D6 and the signal of the protection device RyS1, thereby outputting a failure signal in the No. 1 system or No. 2 system in the power transmission end side substation. The circuit D8 ANDs the output signal of the circuit D7 and the signal of the circuit breaker CBS1, and outputs a failure signal of the power transmission side substation when the circuit breaker CBS1 is on. The circuit D9 ORs the output signal of the circuit D8 and the signals of the protection devices RyLs1 and RyLr1, thereby outputting a failure signal in the path from the power transmission end side substation to the power transmission line L1. The circuit D10 ANDs the output signal of the circuit D9 and the signal of the circuit breaker CB11 to output a failure signal in the path from the power transmission end side substation to the power transmission line L1 when the circuit breaker CB11 is on. . The circuit D11 ANDs the output signal of the circuit D10 and the signals of the protection devices Ry11 and RyTr1, and outputs a failure signal to the first power receiving bus B1 and the transformer Tr1.

  The circuits D12 to D14 output a failure signal in the path from the power transmission end side substation to the transformer Tr2 via the power transmission line L1, the disconnector L210, and the power transmission line L2, respectively. The circuit D12 ANDs the output signal of the circuit D11 and the signal of the disconnector LS10, so that when the disconnector LS10 is on, the No. 1 system transformation from the power transmission end side substation via the transmission line L1. A fault signal up to the device Tr1 is output. The circuit D13 ANDs the output signals of the circuits D5 and D12 and the signals of the protection devices Ry12 and RyTr2, so that the second system passes from the power transmission end side substation via the power transmission line L1, the disconnector LS10, and the power transmission line L2, respectively. The failure signal on the path to the power receiving bus B2 and the transformer Tr2 is output. The circuit D14 ANDs the output signal of the circuit D13 and the signal of the circuit breaker CB22 to output a failure signal on the path from the power transmission end side substation to the transformer Tr2 when the circuit breaker CB22 is on. .

  The circuits D15 to D17 output a failure signal on the route from the power transmission end side substation to the No. 1 system 6 kV bus C1 via the power transmission line L1. The circuit D15 ANDs the output signal of the circuit D11 and the signal of the circuit breaker CB21 to output a failure signal up to the first transformer Tr1 when the circuit breaker CB21 is on. The circuit D16 ORs the output signal of the circuit D15 and the signal of the protection device Ry21 to output a failure signal up to the first system 6 kV bus C1. The circuit D17 ANDs the output signal of the circuit D16 and the signal of the circuit breaker CB20, and outputs a failure signal up to the first system 6kV bus C1 when the circuit breaker CB20 is on.

  The circuit D18 ORs the output signals of the circuits D14 and D17 and the signal of the protection device Ry22, so that the power transmission line L2, the power transmission line L1 and the disconnector L210, and the power transmission line L1 and the circuit breaker CB20 are respectively transmitted from the power transmission end side substation. A fault signal in the route to the 6 kV bus C2 is output.

  In practice, the supervisory control system 3 further includes a circuit that ORs and outputs the output signal of the determination circuit D of FIG. 2 and the signal of the protection device RyF installed corresponding to each distribution line W2. Thus, when the output signal of the circuit is 1, an instruction to disconnect the distributed power source connected to the distribution line W2 is issued. In addition, a circuit for determining whether or not the distributed power source connected to the No. 1 system distribution line W1 should be disconnected can be realized similarly to the circuit shown in FIG.

≪Protective device that is a condition for blocking transfer in various operation modes (examples) ≫
3 to 5, in various operation modes of a substation from which a distribution line connected to a distributed power supply device is drawn, a protection device that is a transfer interruption condition is indicated by gray shading. Further, the “ON” state of the breaker CB and the disconnector LS is indicated by a white circle, and the “OFF” state is indicated by a black circle.

  FIG. 3 is a diagram illustrating a range of a failure protection device in which the photovoltaic power generation device is disconnected in the individual power receiving mode. The individual power receiving form is a form in which the distribution line W2 receives power from the power transmission end side substation through the transmission line L2, and the circuit breaker CBS0 is in the “on” (closed) state, and the disconnector LS10 and the circuit breaker The CB 20 is in a “cut” (open circuit) state. In this embodiment, the protection devices that are the conditions for transferring and blocking the distributed power source connected to the distribution line W2 are RyS1, RyS2, RyLs2, RyLr2, Ry12, RyTr2, and Ry22. The determination circuit corresponding to this form corresponds to circuits D1 to D5, D13, D14, and D18 in the determination circuit D of FIG. Since the disconnector LS10 is in the “OFF” state, the output signal of the circuit D12 is zero. Further, since the circuit breaker CB20 is in the “OFF” state, the output signal of the circuit D17 is zero.

  FIG. 4 is a diagram illustrating a range of a failure protection device in which a photovoltaic power generation device is disconnected in a power transmission line single-line power receiving configuration. The transmission line 1-line power reception form is a form in which the distribution line W2 receives power from the transmission end side substation through the transmission line L1 and the disconnector LS10, and the breaker CBS0 and the disconnector LS10 are in the “ON” state. Thus, the circuit breaker CB20 is in the “OFF” state. Moreover, the circuit breakers CBS2 and CB12 are in the “OFF” state. In this embodiment, the protection devices that are the conditions for transferring and blocking the distributed power source connected to the distribution line W2 are RyS1, RyS2, RyLs1, RyLr1, Ry11, RyTr1, Ry12, RyTr2, and Ry22. The determination circuit corresponding to this form corresponds to the circuits D6 to D14 and D18 in the determination circuit D of FIG. Since the circuit breaker CB12 is in the “OFF” state, the output signal of the circuit D5 is zero. Further, since the circuit breaker CB20 is in the “OFF” state, the output signal of the circuit D17 is zero.

  FIG. 5 is a diagram illustrating a range of a failure protection device in which a photovoltaic power generation device is disconnected in a configuration in which one transmission line and one transformer are stopped. In the transmission line 1 line / transformer 1 unit stop form, the distribution line W2 receives power from the power transmission end side substation through the transmission line L1 and the circuit breaker CB20, and the circuit breaker CBS0 and circuit breaker CB20 are “on”. The disconnector LS10 is in the “OFF” state. Moreover, the circuit breakers CBS2, CB12, and CB22 are in the “OFF” state. In this embodiment, the protection devices that are the conditions for transferring and blocking the distributed power source connected to the distribution line W2 are RyS1, RyS2, RyLs1, RyLr1, Ry11, RyTr1, Ry21, and Ry22. The determination circuit corresponding to this form corresponds to circuits D6 to D11 and D15 to D18 in the determination circuit D of FIG. Since the circuit breaker CB22 is in the “OFF” state, the output signal of the circuit D14 is zero.

  According to the embodiment of the present invention described above, when a failure occurs in the power system 2, the photovoltaic power generation device PV of the distribution line W2 that has received power transfer from the location of the failure is disconnected. A distributed power source that affects the failure location can be reliably shut off. Specifically, the route of power transfer at that time is specified, and the distributed power source of the distribution line W2 connected to the failure location on the route is disconnected.

  According to this, in a power system 2 in which a large number of photovoltaic power generation devices PV are connected, in a situation where the amount of power generated thereby and the load supplied from the bus are balanced, When a system-side failure occurs, even if the voltage of the bus does not decrease (so the conventional technology cannot issue a shut-off command for the photovoltaic power generator PV), a distributed power source such as the photovoltaic power generator PV can be used. It can be reliably shut off.

  According to the above, it is possible to prevent the failure location from being exposed to the charged state, obstruct the restoration operation of the host system, and deliver the electricity with reduced quality to the consumer.

  As mentioned above, although the form for implementing this invention was demonstrated, the said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. The present invention can be changed and improved without departing from the gist thereof, and equivalents thereof are also included in the present invention.

1 Distributed power shut-off system 2 Power system 3 Supervisory control system (supervisory control device)
4. Distributed power control system (distributed power control device)
CB circuit breaker (switching device)
LS disconnector (switchgear)
Ry protective device A1, A2 Power transmission bus (power line)
L1, L2 Transmission line (power line)
B1, B2 Power receiving bus (power line)
C1, C2 6kV bus (power line)
W1, W2 Distribution line D determination circuit D1-D18 circuit (AND circuit, OR circuit)

Claims (7)

A closing device which performs open-circuit and closed-circuit of that power lines to carry power to the distribution line,
A protection device for detecting a failure in a predetermined range of the power line,
Before SL power line, together with the switchgear and stores in advance the connection configuration data of the range, it obtains a close signal indicating a closed circuit by the closing device from the switchgear, to obtain a fault signal indicating a failure from the protection device, Based on the connection configuration data, the closing signal, and the failure signal, it is determined whether or not the distribution line has received power transfer from the failure range detected by the protection device in the power line, and has received power transfer. A supervisory control device that issues a disconnection instruction of the distributed power source connected to the distribution line in the case of
With
The monitoring control unit, when determining whether the distribution line had received power carrier from the failure range, the power actually the distribution line of the connection configuration data and the power line from the close signal A distributed power cut-off system, wherein a route to be conveyed is specified, the failure range is specified from the failure signal, and it is determined whether the distribution line is connected to the failure range through the route. The distributed power shutoff system according to claim 1,
The supervisory control device inputs the closing signal of each switching device and the failure signal of each protection device, and outputs a disconnection signal indicating that a disconnection instruction of a distributed power source connected to the distribution line should be issued With a circuit,
The determination circuit inputs a closing signal of the switchgear provided between the range and the distribution line and a failure signal of the protection device that detects a failure of the range, and performs a logical product of the two signals. An AND circuit that outputs the signal as the disconnection signal. The distributed power shutoff system according to claim 2,
The determination circuit includes an OR circuit that inputs a plurality of ranges of failure signals connected to the distribution line and outputs a logical sum of the plurality of failure signals as the disconnection signal. Shut-off system. A distributed power shut-off system according to any one of claims 1 to 3,
A distributed power supply that normally transmits a control signal for turning on the distributed power supply to the distribution line and stops transmission of the control signal to the distribution line when receiving a disconnection instruction from the monitoring control device A distributed power shut-off system, further comprising a control device. Means for preliminarily storing connection configuration data of a power line that conveys power to the distribution line, a switching device that opens and closes the power line , and a range of the power line that the protection device detects a failure;
Means for obtaining a closing signal indicating closing by the opening and closing device from the opening and closing device;
Means for obtaining a failure signal indicating a failure from the protection device;
Based on the connection configuration data, the closing signal, and the failure signal, it is determined whether or not the distribution line has received power transfer from the failure range detected by the protection device in the power line, and has received power transfer. Means for issuing an instruction to disconnect the distributed power source connected to the distribution line in the case of
With
In determining whether the distribution line had received power carrier from the fault range to identify a path for conveying power from said connection configuration data and the close signal actually the distribution lines of the power line The monitoring control device characterized by identifying the failure range from the failure signal and determining whether the distribution line is connected to the failure range through the route. The monitoring control device according to claim 5,
A determination circuit that inputs the closing signal of each switching device and the failure signal of each protection device and outputs a disconnection signal indicating that a disconnection instruction of a distributed power source connected to the distribution line should be issued,
The determination circuit inputs a closing signal of the switchgear provided between the range and the distribution line and a failure signal of the protection device that detects a failure of the range, and performs a logical product of the two signals. And an AND circuit that outputs the signal as the disconnection signal. The monitoring control device according to claim 6,
The determination circuit includes an OR circuit that inputs a plurality of fault signals connected to the distribution line and outputs a logical sum of the plurality of fault signals as the disconnection signal. .