JPH05207661A - Selective load interrupter - Google Patents

Abstract

PURPOSE:To lower the frequency of erroneous function due to disconnection or short circuit of I/O lines by distributing load interrupters according to the arrangement of generator and loads. CONSTITUTION:Upon occurrence of abnormal trip of generator or interrupter 2b on the generator 1b side, interrupters 4b1-4bj for throwing/interrupting load are interrupted on the generator 1b side. Since other machine, i.e., a generator 1a, is monitoring trip state of counterpart machine through multiplex transmission circuits 22a, 22b, interrupters 4a1-4a1 for throwing/interrupting load are interrupted on the generator 1a side. Interruption is controlled by means of operating circuits 23a, 23b through digital output circuits 24a, 24b. Interrupters 3a, 3b are interrupted from normal side so that buses 25a, 25b are interrupted thus isolating the abnormal side from the system. Thereafter, noncritical interrupters 4a1-4an, 4b1-4bn are selected among loads 26a1-26an, 26b1-26bn and interrupted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a load selecting / breaking device, and in particular, it is important to maintain a system with a sound generator when a part of a plurality of generators operated in parallel fails. The present invention relates to a load selection / breakdown device suitable for ensuring high reliability in selecting and breaking a low load.

[0002]

2. Description of the Related Art FIG. 3 is a block diagram of a conventional load selection / interruption device disclosed in, for example, Japanese Patent Laid-Open No. 3-155334. In the figure, 1a and 1b are generators in which two systems are operated in parallel, 2a and 2b are generators 1a and 1b, and a bus 25
The circuit breakers connected to a and 25b are busbars 3a and 3b.
circuit breakers for connecting a and 25b to each other, and 4a1 to 4an are load circuit breakers for closing and disconnecting loads 26a1 to 26an on the bus bar 25a and 4b1 to 4b.
n is a load breaker circuit breaker 5a, 5a, 5a for closing or breaking the loads 26b1 to 26bn on the bus bar 25b.
b is a voltage detector for detecting the output voltage of the generators 1a and 1b, 6a and 6b are power detectors for detecting the output power of the generators 1a and 1b, and 7a and 7b are generators 1a and 1b.
The generator failure detector for detecting the failure of b, 8 is the load on / off based on the detection values and states of the voltage detectors 5a, 5b, the power detectors 6a, 6b, and the generator failure detectors 7a, 7b. For controlling the circuit breakers 4a1-4an, 4b1-4bn selectively, 9 is a generator power addition unit for adding the detection values of the power detectors 6a, 6b in the calculation control unit 8, and 11 is a calculation control unit 8, voltage detectors 5a, 5b
Generator power addition unit for adding detection values of 10; storage unit for storing output of generator power addition unit 9; output of storage unit 12; output of generator rated power addition unit 11; generator failure A breaking load capacity calculator for calculating a breaking load capacity on the basis of the state detection outputs of the detectors 7a, 7b, 13 selects the load closing breakers 4a1-4an on the basis of the output of the breaking load capacity calculator 12. It is a breaking load selection unit for breaking.

In the above configuration, the generator 1a,
When the 1b are operated in parallel, the detected power of each of the generators 1a and 1b detected by the power detectors 6a and 6b is added by the generator power adding section 9 of the arithmetic control section 8 to obtain the total load power of the system. It is stored in the storage unit 10 and input to the breaking load capacity calculation unit 12. The rated power of the generators 1a and 1b in parallel operation is added by the generator rated power addition unit 11 of the arithmetic control unit 8 that receives the detection values of the voltage detectors 5a and 5b as input.
It is input to the breaking load capacity calculation unit 12 as the total rated power amount of the system.

If a failure occurs in one of the generators 1a and 1b, the generator failure detector 7a,
A failure detection signal is input to the breaking load capacity calculation unit 12 from any of 7b. The breaking load capacity calculation unit 12 is the storage unit 1.
The sum of the generator detected power before the failure stored in 0 and the total rated power amount from the generator rated power addition unit 11 are compared, and when the generator detected power is larger than the total rated power amount, the difference. To the breaking load selecting unit 13, and the breaking load selecting unit 13 selects the breaking load from the load amounts to be reduced in order to continue the operation of the system.
~ 26an, 26b1 to 26bn, a load corresponding to the load amount to be reduced is selected in order from the one with the lowest priority, and the corresponding load closing breaker circuit breaker 4a1.
4an, 4b1 to 4bn are blocked.

[0005]

Since the conventional load selection / interruption device is constructed as described above, the generators 1a, 1
In the power supply system in which b and the busbars 25a and 25b are distributed in each distribution section, the voltage detectors 5a and 5b, the power detector 6
a, 6b, various detectors such as generator failure detectors 7a, 7b, and circuit breakers 4a1-4an, 4b1-
4bn will be placed in a remote location. As a result, the signal line connecting between them passes through the relay station on the way. However, when the signal line is passed through the relay station, the risk of disconnection or short circuit is increased, and the load breaker circuit breakers 4a1 to 4a.
n, 4b1 to 4bn, malfunctions such as mistakes in turning on and shutting off, errors in calculating the interruption load capacity due to voltage and power detection errors, errors in failure detection, etc. are likely to occur, and normal load interruption in the event of a generator failure Not only is it impossible to prevent this, but also unnecessary load shedding easily occurs. In addition, if a failure occurs in the arithmetic control unit 8, the load cannot be cut off at all, and the system cannot operate normally, which is a fatal problem.

The present invention has been made in order to solve the above-mentioned problems, and is capable of preventing disconnection and short circuit of signal lines between various detectors or load circuit breakers and the arithmetic control unit, and at the same time Even if the load circuit breaker fails, the normal load circuit breaker side isolates the faulty device to secure the minimum power supply system to improve the system reliability and speed up the load circuit. The purpose is to provide.

[0007]

In order to achieve the above object, the present invention provides a generator for supplying electric power to a bus bar through a first closing and breaking means and a plurality of power supplies for supplying electric power from the bus bar to a plurality of loads. A plurality of electric power systems having second closing and breaking means, a connecting means for connecting a bus bar of the electric power system to a bus bar of another electric power system, an output voltage of the generator and a state of the first closing and breaking means. Status detecting means for detecting, data communication means for transmitting the output power of the generator of the other power system and the status of the first closing / interrupting means as data, and the generator of the power system and the The state of the first shut-off means is taken in and the states of the generator of the other power system and the first shut-off means are taken in through the data communication means, and the generator of the self and other power systems or the first throw-in means is taken. Assuming all cases of abnormal trips that may occur in the shutoff means, the second closing and shutting means corresponding to the load that may be shut off from the corresponding power system is selected in addition to the self and others. When an abnormal trip occurs in either the generator of the electric power system or the first closing / closing means, the arithmetic control means for selectively cutting off the second closing / closing means selected in advance according to the state of the abnormal trip. And a load selection / interruption device including:

[0008]

All generators of a plurality of electric power systems having a generator for supplying electric power to the busbar through the first closing and breaking means and a plurality of second closing and breaking means for supplying electric power from the busbar to a plurality of loads. The output power and the state of the first closing / interrupting means are fetched via the state detecting means and the data communication means, and all the abnormal trips that may occur in the generators of all the power systems or the first closing / closing means. In the case where an abnormal trip occurs in the generator or the first closing / closing means of one of the power systems, the second closing / breaking means corresponding to the load which may be cut off is selected in advance.
The second closing circuit previously selected for each abnormal trip state is selectively cut off.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a load selection / interruption device according to an embodiment of the present invention. In the figure, arithmetic control units 8a and 8b are generators 1a and 1b, respectively.
Circuit breakers 4a1 to 4 for loading and shutting off provided corresponding to
bn, 4b1 to 4bn are operation control units for selectively controlling cutoff, 14a and 14b are voltage detection circuits for detecting output voltages of the generators 1a and 1b, and 15a and 15b.
Are voltage detecting transformers for detecting the output voltages of the generators 1a and 1b, 16a and 16b are voltage detecting current transformers for detecting the output currents of the generators 1a and 1b, and 20a and 20b are In the arithmetic control units 8a and 8b, the generator 1 is detected from the detected voltage of the voltage detecting transformers 15a and 15b and the detected current of the voltage detecting current transformers 16a and 16b, respectively.
a power detection circuit for detecting the output power of a, 1b, 17a,
Reference numeral 17b designates generator control devices 7a and 7b, circuit breakers 2a and 2b, circuit breakers 3a and 3 in the arithmetic and control units 8a and 8b.
a digital input circuit for inputting the state of b, 18
a and 18b are voltage input circuits for inputting voltages from the voltage detection circuits 14a and 14b in the operation control units 8a and 8b, and 19a and 19b are generators from outputs of the voltage detection circuits 14a and 14b in the operation control units 8a and 8b. 1a, 1b
Frequency detection circuit for inputting the frequency of the output voltage of
21a and 21b are voltage input circuits 18a and 18b and frequency detection circuits 19a and 19 in the arithmetic control units 8a and 8b.
b, an analog input circuit for converting each input of the power detection circuits 20a and 20b into a digital signal and taking in the digital signal, 23
Reference numerals a and 23b calculate inputs from the digital input circuits 17a and 17b and the analog input circuits 21a and 21b to selectively cut off the load closing breakers 4a1 to 4an and 4b1 to 4bn through the digital output circuits 24a and 24b. The arithmetic circuits, 22a and 22b are the arithmetic control unit 8a,
8b is a multiplex transmission circuit for exchanging the respective interruption load amounts, selected interruption loads, and load interruption judgments between the operation control units 8a and 8b. Incidentally, the operation control unit 8a functionally corresponds to the system of the busbar 25a corresponding to the generator 1a, and the operation control unit 8b functionally corresponds to the system of the busbar 25b corresponding to the generator 1b.

The operation of the above arrangement will be described below with reference to the flow chart of FIG. By the way,
Here, the generator 1a as viewed from the arithmetic and control unit 8a will be described as the relevant machine, and the generator 1b will be described as another machine or the other machine, and the generator 1b as viewed from the arithmetic and control unit 8b will be the relevant machine, The machine 1a will be described as another machine or a partner machine.

First, in step S1, the arithmetic control unit 8a inputs the detected voltage in the voltage detection circuit 14a as a voltage through the voltage detection circuit 18a and the frequency through the frequency detection circuit 19a. On the other hand, the power detection circuit 20a inputs the detection voltage in the voltage detection transformer 15a and the detection voltage in the voltage detection current transformer 16a as power through the power detection circuit 20a. These inputs of voltage, frequency, power, etc. are performed by the analog input circuit 2
It is digitally converted through 1a and taken into the arithmetic circuit 23a. On the other hand, the generator 1 detected by the closing / closing state of the circuit breakers 2a and 3a and the generator failure detector 7a.
The failure state of a is taken into the arithmetic circuit 23a through the digital input circuit 17a. On the other hand, the arithmetic control unit 8b uses the detected voltage in the voltage detection circuit 14b as the voltage detection circuit 18b.
Input as voltage through b and frequency detection circuit 1
Input as frequency through 9b. On the other hand, the power detection circuit 20b inputs the detection voltage in the voltage detection transformer 15b and the detection voltage in the voltage detection current transformer 16b as power through the power detection circuit 20b. These inputs of voltage, frequency, power, etc. are digitally converted through the analog input circuit 21b and taken into the arithmetic circuit 23b. On the other hand, the closing state of the circuit breakers 2b and 3b and the failure state of the generator 1b detected by the generator failure detector 7b are processed by the arithmetic circuit 2 through the digital input circuit 17b.
It is taken in by 3b. It is to be noted that various kinds of information about the machine, which is taken into the arithmetic circuit 23a as described above, and various kinds of information about another machine, which is taken into the arithmetic circuit 23b, are mutually exchanged through the multiplex transmission circuits 22a and 22b in step S2. ..

Next, in step S3, the arithmetic circuit 23a determines whether or not the system of this machine and the system of another machine are in parallel operation. Similarly, the arithmetic circuit 23b also determines in step S3 whether or not the system of the machine concerned and the system of another machine are in parallel operation. Here, if it is determined that the parallel operation is not performed, the processing ends, but if it is determined that the parallel operation is performed, the process proceeds to the next step S4, and the multiplex transmission circuit 22
From the states of the other units obtained through a and 22b, it is determined whether or not each is normal. Note that this determination is normal if the partner device is operating, but when the control of the partner device is in a stopped state, or when the multiplex transmission circuits 22a and 22b fail or the mutual transmission lines are broken or short-circuited. If the control status of the other device is unknown, it is determined that the other device is abnormal.

When it is determined in step S4 that the partner machine is normal, the process proceeds to step S5, in which the system power during parallel operation, that is, the total power supplied to the buses 25a and 25b is calculated. This is the detected output power of the generator 1a is Pa
When the detected output power of the generator 1b is Pb, the total generator detected power = Pa + Pb is calculated. At the same time, the total rated power of the generators 1a and 1b is determined by performing the calculation of generator total rated power = Pra + Prb with Pra of the rated power of the generator 1a and Prb of the rated power of the generator 1b.

Next, in preparation for an abnormal trip of the generators 1a, 1b or the circuit breakers 2a, 2b during parallel operation, the generator 1a or 1b of the generator 1a or 1b when the operation is continued in all possible abnormal trip states, respectively. Calculate the overload amount.

First, in step S61, the overload amount Po on the generator 1b side when the generator 1a trips
b is obtained from the calculation of Pob = Pa + Pb−Prb, and the generator 1 continues to operate normally.
The loads 26a1 to 26ak to be interrupted on the generator 1a side are selected in order of increasing importance according to the overload amount Pob on the b side, and the load breaker circuit breaker 4a for interrupting these is selected.
Select 1-4 ak. However, k <n. Similarly, on the generator 1b side, loads 26b1 to 26bi to be interrupted are selected in ascending order of importance, and load interrupting circuit breakers 4b1 to 4b for interrupting these are selected.
Select i. However, i <n.

Next, in step S62, the overload amount Po on the generator 1a side when the generator 1b trips
a is obtained from the calculation Poa = Pa + Pb-Pra, and the generator 1 continues to operate normally.
The loads 26a1 to 26al to be interrupted on the generator 1a side are selected in order of low importance according to the overload amount Poa on the a side, and the load breaker circuit breaker 4 for interrupting these is selected.
Select a1 to 4al. However, 1 <n. Similarly, on the side of the generator 1b as well, loads 26b1 to 26bj to be interrupted are selected in order of decreasing importance, and load interrupting circuit breakers 4b1 to 4b for interrupting these are selected.
Select j. However, j <n.

In the calculations in steps S61 and S62, if the rated power of the normally operating generator 1a or 1b is larger than the actual system power and no overload occurs, it is natural that the breaking load is Not set.

Next, in step S7, it is determined whether or not the circuit breakers 2a and 2b are abnormally tripped due to voltage abnormality, frequency abnormality, overload, generator abnormality, or the like.
This determination is performed by the arithmetic control units 8a and 8b in the digital input circuits 17a and 17b and the analog input circuits 21a and 21b.
This is performed by determining the input from b by the arithmetic circuits 23a and 23b. If it is determined that the trip is not an abnormal trip, the process proceeds to step S8 and the generator failure detectors 7a and 7b and the digital input circuits 17a and 17b cause the arithmetic circuits 23a and 23b to abnormally stop the generators 1a and 1b. Is determined. Where the generator 1
If a and 1b are not abnormally stopped, the process ends. On the other hand, if it is determined in step S7 that the circuit breakers 2a and 2b are abnormally tripped, or if it is determined in step S8 that the generators 1a and 1b are abnormally stopped, the process proceeds to step S9. Step S61, Step S62
Selectively cut off the load selected in.

For example, when an abnormal generator trip or an abnormal trip of the circuit breaker 2a occurs on the side of the generator 1a, the load-disconnecting circuit breakers 4a1 to 4ak selected at step S61 are shut off on the side of the machine. On the other hand, since this machine and the other machine mutually monitor the trip state of the other machine through the multiplex transmission circuits 22a and 22b, on the other machine side, that is, the generator 1b side, the load closing and breaking circuit breakers 4b1 to 4bi.
Is cut off. These cutoff controls are performed by the arithmetic circuits 23a, 2
3b through digital output circuits 24a, 24b.

On the other hand, when an abnormal generator trip or an abnormal trip of the circuit breaker 2b occurs on the side of the generator 1b, on the side of the generator, that is, the side of the generator 1b, the load closing breakers 4b1 to 4bj selected in step S62. Is cut off.
On the other hand, since this machine and the other machine mutually monitor the trip state of the other machine through the multiplex transmission circuits 22a and 22b, the load making and breaking circuit breakers 4a1-4al are cut off on the other machine side, that is, the generator 1a side. It The cutoff control is performed by the digital output circuit 24 from the arithmetic circuits 23a and 23b.
a, 24b.

Incidentally, in step S9, the load 26
The generator 1a or 1b which is normally operated when performing selective interruption by the load closing interruption circuit breakers 4a1 to 4bn and 4b1 to 4bn of a1 to 26an and 26b1 to 26bn.
If the rated power of is larger than the actual system power, the load is not cut off because the breaking load is not set in step S61 or step S62.

When it is determined in step S4 whether the partner machine is normal or abnormal, if it is determined that the partner machine is not normal, the process proceeds to step S10. Step S1
At 0, first, the circuit breakers 2a and 2b have abnormal voltage, abnormal frequency,
Determine whether an abnormal trip has occurred due to overload, generator abnormality, etc. If it is not an abnormal trip, the process proceeds to step S11, and it is determined whether or not the generators 1a and 1b on the side of the machine are abnormally stopped. Here, the generators 1a, 1
If b is not abnormally stopped, the process ends. On the other hand, if it is determined in step S10 that the circuit breakers 2a, 2b have tripped abnormally, or in step S11 the generator 1
If it is determined that a and 1b are abnormally stopped, the process proceeds to step S12, and the circuit breakers 3a and 3b from the normal side to the abnormal machine side are shut off to disconnect the communication between the busbars 25a and 25b. In step S13, the abnormal side is separated from the system. After that, the process proceeds to step S14 to load 26a1.
~ 26an, 26b1 to 26bn are non-important ones, and load breaker circuit breakers 4a1 to 4an, 4b1 to 4b
The disconnection process ends by selectively blocking n. The non-important load in this case is also set in advance from the power of the grid and the output capacity of the generator.

When the loads 26a1 to 26an and 26b1 to 26bn are selectively cut off in step S9 or step S14, the load to be cut off is set in advance, so that the breaking operation can be executed at a very high speed. .. In addition, the processing shown in the flowchart of FIG. 2 is repeatedly executed in preparation for the above occurrence and load fluctuation, and the breaking load is always selected based on the latest information.

In the above embodiment, the arithmetic control units 8a, 8
Loads 26a1 to 26an, 26 corresponding to each of b
Although the configuration for calculating the selective cutoff of b1 to 26bn is illustrated, the loads 26a1 to 26an and 26b1 to 26b are provided in a state where the multiplex transmission circuits 22a and 22b are normally communicating.
You may select the load which should be selected from all loads by giving priority to all bn. In this case, the load to be interrupted in step S9 and the load to be interrupted in step S14 are different, but this can be easily performed by performing calculations for selecting respective loads.

[0026]

As described above, according to the present invention, by disposing the load interrupting devices in a distributed manner according to the arrangement of the generator and the load, the frequency of malfunctions due to disconnection or short circuit of the input / output lines is reduced. The reliability of the power system is improved by increasing the reliability of the power system, and by always performing the calculation for selecting the load, the load of the corresponding system can be selectively cut off even if a communication error occurs. There is an effect that can be greatly improved.

[Brief description of drawings]

FIG. 1 is a block diagram of a load selection / interruption device according to an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the configuration of FIG.

FIG. 3 is a block diagram of a conventional load selection and cutoff device.

[Explanation of symbols]

1a, 1b Generator 2a, 2b Circuit breaker 3a, 3b Circuit breaker 4a1-4an, 4b1-4bn Load breaker circuit breaker 5a, 5b Voltage detector 6a, 6b Power detector 7a, 7b Generator failure detector 8, 8a, 8b Calculation control part 9 Generator power addition part 10 Storage part 11 Generator rated power addition part 12 Breaking load capacity calculation part 13 Breaking load selection part 14a, 14b Voltage detection circuit 15a, 15b Voltage detection transformer 16a, 16b Current transformer for voltage detection 17a, 17b Digital input circuit 18a, 18b Voltage input circuit 19a, 19b Frequency detection circuit 20a, 20b Power detection circuit 21a, 21b Analog input circuit 22a, 22b Multiplex transmission circuit 23a, 23b Arithmetic circuit 24a, 24b Digital output circuit 25a, 25b Bus bar 26a1 to 26an, 26b ~26bn load

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] July 16, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

[0007]

In order to achieve the above object, the present invention provides a generator for supplying electric power to a bus bar through a first closing and breaking means and a plurality of power supplies for supplying electric power from the bus bar to a plurality of loads. A plurality of electric power systems having second closing / interrupting means, a connecting means for connecting a busbar of the electric power system to a busbar of another electric power system, an output voltage and a current of the generator , and the first closing / interrupting means. State detecting means for detecting the state, data communication means for transmitting the output power of the generator of the other power system and the state of the first closing / interrupting means as data, and the generator for the power system through the state detecting means. And the state of the first closing and breaking means and the state of the first closing and breaking means and the generator of the other power system via the data communication means, and the generator of the self and another power system or Assuming all cases of abnormal trips that may occur in the closing / closing means, the second closing / closing means corresponding to the load that may be cut off from the corresponding power system is selected and And when an abnormal trip occurs in any of the generator of the other power system or the first closing / closing means, a calculation to selectively cut off the second closing / closing means selected in advance according to the state of the abnormal trip. A load selection / interruption device including a control unit.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

FIG. 1 is a block diagram of a load selection / interruption device according to an embodiment of the present invention. In the figure, arithmetic control units 8a and 8b are generators 1a and 1b, respectively.
Circuit breakers 4a1 to 4 for loading and shutting off provided corresponding to
bn, 4b1 to 4bn are operation control units for selectively controlling cutoff, 14a and 14b are voltage detection circuits for detecting output voltages of the generators 1a and 1b, and 15a and 15b.
Are voltage detecting transformers for detecting the output voltages of the generators 1a and 1b, 16a and 16b are current detecting current transformers for detecting the output currents of the generators 1a and 1b, and 20a and 20b are In the arithmetic control units 8a and 8b, the generator 1 is respectively detected from the detection voltages of the voltage detection transformers 15a and 15b and the detection currents of the current detection current transformers 16a and 16b.
a power detection circuit for detecting the output power of a, 1b, 17a,
Reference numeral 17b designates generator control devices 7a and 7b, circuit breakers 2a and 2b, circuit breakers 3a and 3 in the arithmetic and control units 8a and 8b.
a digital input circuit for inputting the state of b, 18
a and 18b are voltage input circuits for inputting voltages from the voltage detection circuits 14a and 14b in the operation control units 8a and 8b, and 19a and 19b are generators from outputs of the voltage detection circuits 14a and 14b in the operation control units 8a and 8b. 1a, 1b
Frequency detection circuit for inputting the frequency of the output voltage of
21a and 21b are voltage input circuits 18a and 18b and frequency detection circuits 19a and 19 in the arithmetic control units 8a and 8b.
b, an analog input circuit for converting each input of the power detection circuits 20a and 20b into a digital signal and taking in the digital signal, 23
Reference numerals a and 23b calculate inputs from the digital input circuits 17a and 17b and the analog input circuits 21a and 21b to selectively cut off the load closing breakers 4a1 to 4an and 4b1 to 4bn through the digital output circuits 24a and 24b. The arithmetic circuits, 22a and 22b are the arithmetic control unit 8a,
8b is a multiplex transmission circuit for exchanging the respective interruption load amounts, selected interruption loads, and load interruption judgments between the operation control units 8a and 8b. Incidentally, the operation control unit 8a functionally corresponds to the system of the busbar 25a corresponding to the generator 1a, and the operation control unit 8b functionally corresponds to the system of the busbar 25b corresponding to the generator 1b.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction content]

First, in step S1, the arithmetic control unit 8a inputs the detected voltage in the voltage detection circuit 14a as a voltage through the voltage detection circuit 18a and the frequency through the frequency detection circuit 19a. On the other hand, the power detection circuit 20a inputs the detection voltage in the voltage detection transformer 15a and the detection voltage in the current detection current transformer 16a as power through the power detection circuit 20a. These inputs of voltage, frequency, power, etc. are performed by the analog input circuit 2
It is digitally converted through 1a and taken into the arithmetic circuit 23a. On the other hand, the generator 1 detected by the closing / closing state of the circuit breakers 2a and 3a and the generator failure detector 7a.
The failure state of a is taken into the arithmetic circuit 23a through the digital input circuit 17a. On the other hand, the arithmetic control unit 8b uses the detected voltage in the voltage detection circuit 14b as the voltage detection circuit 18b.
Input as voltage through b and frequency detection circuit 1
Input as frequency through 9b. On the other hand, the power detection circuit 20b detects the voltage detected by the voltage detection transformer 15b.
The detected voltage in the current detecting current transformer 16b is input as electric power through the electric power detection circuit 20b. These inputs of voltage, frequency, power, etc. are digitally converted through the analog input circuit 21b and taken into the arithmetic circuit 23b. On the other hand, the closing state of the circuit breakers 2b and 3b and the failure state of the generator 1b detected by the generator failure detector 7b are processed by the arithmetic circuit 2 through the digital input circuit 17b.
It is taken in by 3b. It is to be noted that various kinds of information about the machine, which is taken into the arithmetic circuit 23a as described above, and various kinds of information about another machine, which is taken into the arithmetic circuit 23b, are mutually exchanged through the multiplex transmission circuits 22a and 22b in step S2. ..

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] Explanation of code

[Correction method] Change

[Correction content]

[Explanation of Codes] 1a, 1b Generator 2a, 2b Circuit breaker 3a, 3b Circuit breaker 4a1-4an, 4b1-4bn Load breaker circuit breaker 5a, 5b Voltage detector 6a, 6b Electric power detector 7a, 7b Generator Failure detector 8, 8a, 8b Calculation control unit 9 Generator power addition unit 10 Storage unit 11 Generator rated power addition unit 12 Breaking load capacity calculation unit 13 Breaking load selection unit 14a, 14b Voltage detection circuit 15a, 15b For voltage detection Transformer 16a, 16b Current detecting current transformer 17a, 17b Digital input circuit 18a, 18b Voltage input circuit 19a, 19b Frequency detection circuit 20a, 20b Power detection circuit 21a, 21b Analog input circuit 22a, 22b Multiplex transmission circuit 23a, 23b Arithmetic circuit 24a, 24b Digital output circuit 25a, 25b Bus bar 26a1-2 an, 26b1~26bn load

[Procedure correction 6]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

[Procedure Amendment 7]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

Claims (1)

[Claims] 1. A plurality of power systems having a generator for supplying electric power to a bus bar through a first closing and breaking means and a plurality of second closing and breaking means for supplying electric power from the bus bar to a plurality of loads, and the electric power. Connecting means for connecting the busbar of the system to the busbar of another power system, state detecting means for detecting the output voltage of the generator and the state of the first closing / interrupting means, and output of the generator of the other power system Data communication means for transmitting electric power and the state of the first closing and breaking means as data, and the states of the generator and the first closing and breaking means of the power system are taken in through the state detecting means and the data communication means is used. All the abnormal trips that may occur in the generator of the other power system and the first closing and breaking means, and in the generator of the other power system or the first closing and breaking means. Assuming the above case, the second closing / interrupting means corresponding to the load which may be interrupted from the corresponding electric power system is selected, and the generator of the self and other electric power systems or the first closing / interrupting means. And a calculation control means for selectively shutting off the second closing / closing means selected in advance according to the state of the abnormal trip when any one of the above-mentioned load tripping devices is provided. ..