JP2520514B2 - Emergency power supply facilities and on-site power supply facilities for nuclear power plants - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION This invention is of a nuclear power plant non
It relates to commercial power equipment and plant power equipment, in particular, very suitable nuclear power plant to ensure emergency power in an external power loss if another nuclear plant in the adjacent region exists
Power supply facility and power supply facility in the office .

[0002]

2. Description of the Related Art A power source bus of an emergency power source of a nuclear power plant (hereinafter referred to as an emergency bus) is basically provided independently for each plant and each emergency power source. Figure 6
[Fig. 3] is a single-source connection diagram of a power source of a nuclear power plant having two nuclear reactors. One reactor side generator 4a,
The generator on the other reactor side is designated as 4b. Each generator 4a,
The output of 4b is transmitted to the transmission line 1 via the circuit breakers 3a and 3b, respectively.
The transmission lines 1 are connected to each other at the switching station busbar 2. The power source of each power station is obtained from the power generators in the power station during normal operation of the nuclear reactor.
a, 7b and power receiving circuit breakers 8a, 8b are connected to the regular busbars 10a, 10b in each place. Bus 10
a and 10b are provided for each system in each power plant, and therefore the power receiving circuit breakers 8a and 8b are also provided for each system. Further, the service buses 10a and 10b are connected to service buses 16a and 16b via service / emergency bus connecting circuit breakers 12a and 12b and emergency bus power receiving circuit breakers 14a and 14b, respectively. Emergency bus 16
Diesel generators 20a and 20b, which are emergency power sources, are connected to a and 16b via power receiving circuit breakers 17a and 17b, respectively. This emergency diesel generator 20a,
A plurality of 20 b are provided in each power plant, usually three (20 b is shown in FIG. 6). Furthermore, FIG.
In the power supply system shown in FIG. 1, a starting transformer 6 is connected to the power transmission line 1 via a starting transformer power supply breaker 5, and the output of the starting transformer 6 is connected to a common bus 11 via a starting transformer power receiving breaker 9. This common busbar 11 is connected to each common busbar 10a, 10b of each plant to connect / disconnect the common / common busbar 15a, respectively.
It is connected via 15b.

During the normal operation of the nuclear power plant, a part of the electric power of the generators 4a and 4b is supplied to the on-site transformer 7.
a, 7b, power receiving circuit breakers 8a, 8b, regular busbars 10a, 1
0b, the normal / emergency busbar communication circuit breakers 12a, 12b, and the emergency busbar power receiving circuit breakers 14a, 14b receive power from the emergency busbars 16a, 16b (each circuit breaker is closed). Various devices (not shown) connected to the emergency buses 16a and 16b, for example, devices of a system that keeps the reactor water level constant are operating. When starting a nuclear power plant, the power from the power transmission line 1 is supplied by the starting transformer power supply breaker 5, the starting transformer 6, the starting transformer power receiving breaker 9, the common bus 11, the common / service bus connecting breaker. common busbar 10a through 15, is subjected fed to 10b, the emergency bus 16a, 16b
The power of the service buses 10a and 10b is supplied to the circuit breaker 1
It is supplied via 2a and 14a.

If a situation occurs in which the generator 4a trips now, and at the same time there are multiple accidents on the power transmission line 1 (hereinafter, this state is referred to as when external power is lost), the emergency bus 16a is sent. The power supply is cut off.
However, the device connected to the emergency bus 16a needs to ensure the operation even in such a state. Therefore, when the loss of the external power source is detected, in the case of FIG. 6, the two emergency diesel generators 20a are automatically started and the diesel power receiving circuit breaker 17a is automatically closed, so that each diesel generator 20a The generated electric power is supplied to the emergency bus 16a of each system. The circuit breaker 14a that connects the emergency bus 16a and the regular bus 10a when the external power source is lost is automatically shut off.

Note that, for example, JP-A-62-228997 is related to the prior art.

[0006]

In the above nuclear power plant configuration, when the emergency diesel generator fails to start when the external power source is lost, the power supply busbar 16a of the emergency diesel generator reaches a power failure, The power supply to the equipment connected to the bus bar 16a is stopped. It is desirable that the nuclear power plant has a safety structure, but it is a large-scale emergency diesel generator of about 100 tons due to an emergency situation such as whether or not there are several times during the life of the reactor. It would be a waste of space and cost to prepare each as a backup for each emergency diesel generator. However, as a safety measure, it is necessary to take measures against accidents that rarely occur.

As a countermeasure for this, it is conceivable that a similar emergency diesel generator of an adjacent nuclear power plant is made to stand by for backup. Looking at the power supply system diagram of FIG. 6, the output of the emergency diesel generator 20b of the adjacent nuclear power plant is the power supply busbar 16 of the emergency diesel generator 20a via various circuit breakers and service busbars.
It is possible to connect to a. However, although it is possible in principle to supply electric power from an emergency diesel generator of another nuclear power plant to an emergency bus that requires electric power via this connection path, there are the following problems. That is, various circuit breakers have various interlock conditions defined for normal operation and other cases, and it is necessary to combine these conditions to newly define interlock conditions. or,
The loss of the external power source described above may occur when a large earthquake or the like occurs. When such a situation occurs, emergency power is supplied through the service bus 10 or the common bus 11 as a route. Does not make much sense as a safety measure. This is because the structure of the turbine building that houses the regular bus and the common bus is relatively weak compared to the reactor building that has many times the measures taken against normal building standards as safety equipment such as seismic design. is there.

An object of the present invention is to provide a nuclear power plant that can use the emergency power of an adjacent nuclear power plant as a backup without changing the conventional interlock conditions and without using a turbine building . It is to provide emergency power supply equipment and on-site power supply equipment .

[0009]

Means for Solving the Problems] The above object, the 2 groups Hara
In a nuclear power plant equipped with a slave power plant,
A circuit breaker connected to the emergency bus installed at the slave power plant, and
Connect the circuit breakers of the nuclear power plant and connect each circuit breaker.
The emergency busbars of both nuclear power plants
From the emergency power source installed at one of the nuclear power plants
The emergency power supplied to the emergency bus of the power plant is supplied to the other source.
Provide a communication circuit to supply to the emergency bus of the slave power plant
It will be achieved. The above-mentioned purpose is also based on two nuclear power plants.
Emergency station installed at each nuclear power plant equipped with a power station
Emergency power supply installed at one nuclear power plant by connecting bus lines
Emergency power supplied from the nuclear power plant to the emergency bus
Contact times to supply power to the emergency busbars of the other nuclear power plant
In a nuclear power plant with a road,
At the connection point between the busbar and the communication circuit, the emergency power
Supply from one nuclear power plant to the other
This is achieved by providing a circuit breaker that is closed at the time of opening. Up
The purpose is also to have two nuclear power plants,
Connect between the emergency busbars installed at each of the power stations.
From the emergency power source installed at one of the nuclear power plants,
The emergency power supplied to the emergency bus of the power station is supplied to the other atom.
A communication circuit was provided to supply to the emergency bus of the power plant
In a nuclear power plant, the emergency bus and the
At the connection point with the
Emergency power supply fails to start and the other nuclear power plant
Shutdown that is made when receiving emergency power from the power supply
This is achieved by providing a container. The above purpose is also two
Installed at each of the nuclear power plants.
Nuclear power generation by connecting between emergency busbars
From the emergency power supply installed at the station to the emergency bus of the nuclear power plant
The emergency power supplied is used as the emergency mother of the other nuclear power plant.
Nuclear power plant equipped with a communication circuit for supplying power to power lines
At, the connection point between the emergency bus and the communication circuit
To start the emergency power source of either one of the nuclear power plants
From the emergency power source of the other nuclear power plant
The interruption that is input when supplying emergency power to a nuclear power plant.
This is achieved by providing a breaker. The above purpose is also 2
Equipped with basic nuclear power plants and installed at each nuclear power plant
And connecting the emergency busbars disposed one NPP
From the emergency power supply of the
The supplied emergency power is supplied to the emergency bus of the other nuclear power plant.
In a nuclear power plant equipped with a power supply communication circuit
At the connection point between the emergency bus and the communication circuit,
Emergency power from one nuclear power plant to the other
In addition to providing a circuit breaker that is turned on when supplying to the power station,
Achieved by installing the breaker in the emergency power control panel
It The above purpose also includes two nuclear power plants,
Connect between the emergency busbars installed at each sub-power station
From either of the emergency power sources installed at the nuclear power plant,
The emergency power supplied to the emergency bus of the slave power plant
A communication circuit to supply to the emergency bus of the nuclear power plant
In the nuclear power plant
At either point of connection with the communication circuit, either one of the nuclear power plants
The emergency power supply of the power plant failed to start and the other nuclear power plant
Turned on when receiving emergency power from the emergency power supply
Equipped with a circuit breaker for the emergency power control panel
It is achieved by attaching to. The above purpose is also 2
Equipped with basic nuclear power plants and installed at each nuclear power plant
Between the emergency buses that have been
From an emergency power source installed at a power station to an emergency bus at the nuclear power station
Emergency power supplied to the other nuclear power plant
Nuclear power generation plan with a communication circuit for supplying to the busbar
The connection point between the emergency bus and the communication circuit.
The emergency power source of one of the nuclear power plants
From the emergency power source of the other nuclear power plant
Input when supplying emergency power to nuclear power plants
Provide a circuit breaker and use the circuit breaker as an emergency power control panel.
It is achieved by mounting. The above purpose is also
Each of the sub-stations is connected to the emergency bus and the emergency bus.
Atom consisting of two nuclear power plants with a circuit breaker
In the power plant, the circuit breakers of both nuclear power plants
When the power is turned on, between the emergency buses of both nuclear power plants
Connect the atom from the emergency power source installed at one of the nuclear power plants
The emergency power supplied to the emergency bus of the power plant
Provide a communication circuit to supply to the emergency bus of a nuclear power plant
It will be achieved. The above purpose is also connected to the power line.
A switching station bus to, 2 output to the switchyard bus is connected
At each nuclear power plant and at each nuclear power plant
Generator bus at each nuclear power plant
And a transformer for supplying power to the above-mentioned service bus
Received power from the service bus at the slave power station
It transforms the power received from the emergency bus and the transmission line at startup.
Starter transformer to supply to the service bus of both nuclear power plants
The external power source was lost at each nuclear power plant and
Occurs when the connection between the busbar and the emergency busbar is broken.
And supplies the generated emergency power to the emergency bus.
On-site power supply facility for nuclear power plant with emergency power supply
Is a circuit breaker connected to the emergency bus.
Start of the emergency power source of either one of the nuclear power plants
The emergency of both nuclear power plants was input when
Connect the busbars from the other nuclear power plant to
A circuit breaker that supplies power to the emergency bus at the slave power plant
It is achieved by providing. The above purpose also applies to power lines
The switching station bus to be connected and the output connected to the switching station bus
Generators of the two nuclear power plants and each nuclear power plant
Power generation at the nuclear power station
On-site transformer that transforms the machine output and supplies it to the service bus
And, at each nuclear power plant, power is supplied from the service bus.
Received from the emergency bus and the transmission line at startup
Power supply to the service bus of both nuclear power plants
Loss of external power at the dynamic transformer and at each nuclear power plant
The connection between the service bus and the emergency bus is cut off.
The emergency power generated when the
Nuclear power plant with emergency power supply
In front of either one of the nuclear power plants
When the emergency power supply fails to start,
Connect the emergency buses to the other nuclear power plant
Power is supplied to the emergency bus of one nuclear power plant.
This is achieved by providing a communication circuit that The above purpose is
In addition, the switchyard busbar connected to the transmission line and the switchyard busbar
Each nuclear power plant generator to which the output is connected, and each
Regular and emergency buses in nuclear power plants, and
At the nuclear power plant, the output of the generator is transformed to
The on-site transformer that supplies the power bus and the
Transform the received power into the emergency buses of both nuclear power plants
The starting transformer to be supplied and external power at each nuclear power plant
When power is lost and power to the emergency bus is cut off
Supply the emergency power generated by the start-up to the emergency bus
Power station of a nuclear power plant with an emergency power supply
In the source equipment, a circuit breaker connected to the emergency bus
There is one of the emergency power sources of the nuclear power plant
It is turned on when the startup fails and the
One of the above-mentioned one from the other nuclear power plant by connecting between the common bus
Shutting off power to the emergency bus of a nuclear power plant in
This is achieved by providing a container. The above purpose is also for power transmission
The switchgear busbar connected to the line and the output connected to the switchgear busbar
Each of the two nuclear power plants to be continued and each nuclear power plant
Regular and emergency buses at electric power stations and
At the power station, transform the generator output into the service bus
On-site transformer to supply, and power received from power line at startup
Power to the emergency busbars of both nuclear power plants
Loss of start-up transformer and external power supply at each nuclear power plant
It is activated when the power supply to the emergency bus is cut off.
The emergency power that is generated and generated is supplied to the emergency bus.
Power supply facility for nuclear power plants equipped with
The emergency power source of either one of the nuclear power plants
The emergency mothers of both nuclear power plants when the startup of the
Connect the lines to connect the atom from the other nuclear power plant
This is accomplished by providing a communication circuit that supplies power to the emergency bus of the power plant .

[0010]

The normal interlock condition will be described by taking the flow of power from the power transmission line side to the emergency bus side as an example in FIG. 6, and vice versa, that is, from the emergency bus side to the power transmission line side. It is not assumed that electricity will be supplied to. For this reason, in order to have a configuration in which the power of the emergency power source of the adjacent nuclear power plant is taken in via the service bus or common bus, the power flow on the power sending side is from the emergency bus side to the service bus direction. Therefore, the interlock condition must be changed as described above.

However, in the present invention, two nuclear power plants are used.
Since the configuration is such that the emergency power is exchanged between the emergency buses of the above, it is not necessary to change the interlock condition. Also,
Communication circuit and disconnection provided to accommodate this emergency power
Since the reactor can be installed in the control panel of the reactor building,
Only buildings with extremely high safety standards can be used, which is sufficient as an emergency safety measure.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a single-line connection diagram of an internal power source of a nuclear power plant according to an embodiment of the present invention. The same parts as those in FIG. 6 are designated by the same reference numerals and the description thereof will be omitted. In the power plant according to the embodiment of the present invention, the emergency bus bar 16a of each system of each nuclear power plant is directly connected to the emergency bus bar 16b of each system of the adjacent nuclear power plant by the communication circuit 19 for each system. In the middle of each connection circuit 19, a busbar connection breaker 18
By providing a and 18b and opening and closing the circuit breakers 18a and 18b, the corresponding communication circuit 19 is released and connected. The circuit breakers 18a and 18b are attached to an emergency power control panel of each nuclear power plant, and in this embodiment, they are manually opened and closed. It is also possible to open and close this automatically.

FIG. 2 is a detailed configuration diagram around the communication circuit shown in FIG. Power receiving circuit breaker 1 for the nuclear power plant on the left side
An emergency bus bar 16a connected to an unillustrated regular bus bar 10a (Fig. 1) via 4a, and an emergency bus bar connected to an unillustrated regular bus line 10b (Fig. 1) via a power breaker 14b for the right nuclear power plant. 16b is a busbar circuit breaker 1
It is directly connected via 8a, 18b and a communication circuit 19. The voltage of the emergency bus 16a is input to the undervoltage relay 37a and the voltmeter 38a via the voltage transformer 36a, and when the voltage does not reach the predetermined value, the undervoltage relay 37a operates to operate the ananzeta (ANN). ) 39a operates. In addition, the emergency bus bar 16a has a power receiving circuit breaker 17a.
A diesel generator 20a as an emergency power source is connected via the so that the output of the generator 20a is input to the voltage relay 41a, the voltmeter 30, and the frequency meter 31a via the voltage transformer 29a. Has become. The emergency bus bar 16b on the right side has the same configuration, and the same components as those on the left side described above are designated by the same reference numerals "b" and the description thereof is omitted.

Under normal operating conditions, the circuit breaker 14a is closed, the circuit breaker 17a is open, and the circuit breakers 18a and 18b are closed.
Has been released. Now, suppose that the loss of external power occurred at the nuclear power plant on the left. When the external power supply is lost, the voltage of the emergency bus 16a decreases, and when the voltage falls below a predetermined voltage value, the voltage changes via the voltage transformer 36a to the voltmeter 38.
It is displayed on a and can be recognized by the operator by monitoring it. Also, the undervoltage relay 37a operates due to the voltage drop and the ananzeta 39a issues a warning, so that the operator can recognize the occurrence of such a situation.

On the other hand, when the undervoltage relay 37a operates, the interlocking control means shown in FIG. 3 operates, the circuit breaker 14a is cut off or released, and the emergency busbar 16a is cut off from the regular busbar 10a side. , The diesel generator 20a is started. When the start-up of the diesel generator 20a is completed and its output rises to reach a predetermined voltage value,
The interlocking control means shown in FIG. 4 operates to operate the voltage relay 41a, close the power receiving breaker 17a, and supply the generated power of the diesel generator 20a to the emergency bus 16a.

If the diesel generator 20a fails to start, the output voltage of the generator 20a does not rise, and therefore the voltage relay 41a does not operate. Therefore, the power receiving circuit breaker 17a remains in the released state. Further, the failure in starting the generator 20a is known to the operator who monitors the voltmeter 30 and the frequency meter 31a. In this state, the circuit breaker 14a
Is in the open state and the undervoltage relay 37a is in the operating (open) state. Therefore, according to the interlock shown in FIG. 5, the operator turns on the busbar connection breakers 18a and 18b, so that the communication circuit 19 performs both emergency operations. Electrically connects the busbars 16a, 16b
It will be Rukoto. As a result, power is supplied to the emergency bus 16a from the nuclear power plant on the right side. If the nuclear power plant on the right side is operating normally, the emergency bus 16
The output power of the generator 4b of the nuclear reactor is supplied to b. When the nuclear reactor is stopped, electric power is supplied from the power transmission line 1 side to the emergency bus 16b. If there is a loss of external power at the nuclear power plant on the right side, the diesel generator 2
0b is activated, and the emergency bus bar 16a is supplied with power from the diesel generator 20b.

[0017]

According to the present invention, even when external power is lost and situation that emergency power startup failure occurs, conventional cost <br/> preparative Moreover have less without changing the interlock circuit It will be possible to deal with it, and the safety of the nuclear power plant will be further improved.

[Brief description of drawings]

FIG. 1 is a single power source line connection diagram of a nuclear power plant according to an embodiment of the present invention.

FIG. 2 is a detailed configuration diagram around the communication circuit shown in FIG.

FIG. 3 is an interlock block diagram for automatic startup of an emergency power supply due to operation of an undervoltage relay.

FIG. 4 is a disconnection interlock block diagram of the emergency power receiving breaker when the emergency power startup fails.

FIG. 5 is an interlock block diagram for an emergency bus-bar communication breaker of an adjacent nuclear power plant.

FIG. 6 is a single-wire connection diagram of a conventional nuclear power station in-house power source.

[Explanation of symbols]

1 ... Transmission line, 4a, 4b ... Generator for reactor, 10a,
10b ... Regular busbars, 14a, 14b ... Emergency busbar power receiving circuit breaker, 16a, 16b ... Emergency busbars, 17a, 17b ...
Emergency power receiving breaker, 18a, 18b ... Emergency busbar communication breaker, 19 ... Communication circuit, 20a, 20b ... Emergency diesel generator.

Claims (13)

(57) [Claims] 1. Nuclear power generation with two nuclear power plants
In the plant, as an emergency bus installed at each nuclear power plant
Between the connected circuit breaker and the circuit breaker of each nuclear power plant
When the two circuit breakers are connected and each circuit breaker is turned on,
Connect the emergency busbars to each other and install one of the nuclear power plants.
Supplied from the emergency power source to the emergency bus of the nuclear power plant
Supply emergency power to the other nuclear power plant's emergency bus
And a communication circuit for
Runt emergency power supply equipment . 2. A nuclear power plant equipped with two nuclear power plants.
Connect between the emergency busbars installed in each of the power stations.
From the emergency power source installed at a nuclear power plant,
Emergency power supplied to the service bus is used for the other nuclear power plant.
Nuclear power plant equipped with a communication circuit to supply the emergency bus
In the electric power plant, the emergency bus and the communication circuit
The emergency power to one of the nuclear power plants at the connection point of
From the other to the other nuclear power plant
Emergency power for nuclear power plant characterized by being installed
Source equipment . 3. A nuclear power plant comprising two nuclear power plants.
Connect between the emergency busbars installed at each of the power stations.
From the emergency power source installed at one of the nuclear power plants,
The emergency power supplied to the emergency bus of the power station is supplied to the other atom.
A communication circuit was provided to supply to the emergency bus of the power plant
In a nuclear power plant, the emergency bus and the
At the connection point with the
Emergency power supply fails to start and the other nuclear power plant
Shutdown that is made when receiving emergency power from the power supply
Of a nuclear power plant characterized by the provision of
Power supply equipment . 4. A nuclear power plant equipped with two nuclear power plants.
Connect between the emergency busbars installed at each of the power stations.
From the emergency power source installed at one of the nuclear power plants,
The emergency power supplied to the emergency bus of the power station is supplied to the other atom.
A communication circuit was provided to supply to the emergency bus of the power plant
In a nuclear power plant, the emergency bus and the
At the connection point with the
Emergency power supply fails to start and the other nuclear power plant
Supplying emergency power from the power source to the one nuclear power plant
Atom with a circuit breaker that is turned on when
Emergency power supply equipment for power plants . 5. A nuclear power plant equipped with two nuclear power plants.
Connect between the emergency busbars installed in each of the power stations.
From the emergency power source installed at a nuclear power plant,
Emergency power supplied to the service bus is used for the other nuclear power plant.
Nuclear power plant equipped with a communication circuit to supply the emergency bus
In the electric power plant, the emergency bus and the communication circuit
The emergency power to one of the nuclear power plants at the connection point of
From the other to the other nuclear power plant
Installed and installed the circuit breaker on the emergency power control panel
Emergency power supply equipment for nuclear power plants characterized by
Be prepared . 6. A nuclear power plant comprising two nuclear power plants.
Connect between the emergency busbars installed at each of the power stations.
From the emergency power source installed at one of the nuclear power plants,
The emergency power supplied to the emergency bus of the power station is supplied to the other atom.
A communication circuit was provided to supply to the emergency bus of the power plant
In a nuclear power plant, the emergency bus and the
At the connection point with the
Emergency power supply fails to start and the other nuclear power plant
Shutdown that is made when receiving emergency power from the power supply
Equipped with a circuit breaker and installed the circuit breaker on the emergency power control panel.
Emergency power for nuclear power plants characterized by being attached
Source equipment . 7. A nuclear power plant comprising two nuclear power plants.
Connect between the emergency busbars installed at each of the power stations.
From the emergency power source installed at one of the nuclear power plants,
The emergency power supplied to the emergency bus of the power station is supplied to the other atom.
A communication circuit was provided to supply to the emergency bus of the power plant
In a nuclear power plant, the emergency bus and the
At the connection point with the
Emergency power supply fails to start and the other nuclear power plant
Supplying emergency power from the power source to the one nuclear power plant
A circuit breaker that is closed when the
Nuclear power generation characterized by being installed in a regular power control panel
Emergency power supply equipment for power plants . 8. The odor according to any one of claims 2 to 7.
The circuit breakers are provided at both ends of the communication circuit.
Emergency power supply equipment for nuclear power plants characterized by
Equipment. 9. Each of the nuclear power plants has an emergency bus and
Two nuclear power plants with a circuit breaker connected to the emergency bus
In a nuclear power plant consisting of power plants,
When the circuit breaker of the power plant is turned on,
Connect the emergency buses to each other and
Supplied from a commercial power source to the emergency bus of the nuclear power plant
Supply the emergency power to the emergency bus of the other nuclear power plant
Nuclear power generation plan characterized by the provision of a communication circuit
Emergency power supply equipment. 10. A switchgear busbar connected to a power transmission line,
Each of the two nuclear power plants whose output is connected to the switchyard bus
Generators, service buses at each nuclear power plant, and each atom
In the power plant, the generator output is transformed to transform the regular mother
On-site transformers that supply power to the lines and at each nuclear power plant
Emergency bus that receives power from the regular bus and at startup
The power received from the transmission line is transformed to the front of both nuclear power plants.
The starting transformer that supplies the regular bus and each nuclear power plant
The external power supply was lost and the normal bus and the emergency bus
An emergency that was activated and generated electricity when the connection between
An emergency power supply for supplying electric power to the emergency bus
In the power supply facility in the nuclear power plant, the emergency
A circuit breaker connected to the bus for either one of the atoms
Turn on when the emergency power supply of the power plant fails to start
Connect the emergency busbars of both nuclear power plants to the other
From one of the nuclear power plants
Characterized by having a circuit breaker for supplying electric power to the power bus
On-site power supply equipment for a nuclear power plant. 11. A switchgear busbar connected to a power transmission line, and
Each of the two nuclear power plants whose output is connected to the switchyard bus
Generators, service buses at each nuclear power plant, and each atom
In the power plant, the generator output is transformed to transform the regular mother
On-site transformers that supply power to the lines and at each nuclear power plant
Emergency bus that receives power from the regular bus and at startup
The power received from the transmission line is transformed to the front of both nuclear power plants.
The starting transformer that supplies the regular bus and each nuclear power plant
The external power supply was lost and the normal bus and the emergency bus
An emergency that was activated and generated electricity when the connection between
An emergency power supply for supplying electric power to the emergency bus
Either of the on-site power supply facilities of the nuclear power plant
Startup of the emergency power source at one nuclear power plant failed
Sometimes connecting the emergency buses of both nuclear power plants
From one nuclear power plant to the above
Features a communication circuit that supplies power to the service bus
In-house power supply equipment for a nuclear power plant. 12. A switchgear busbar connected to a power transmission line,
Each of the two nuclear power plants whose output is connected to the switchyard bus
Generators, service buses and emergency
Change the generator output at each power plant and each nuclear power plant.
On-site transformer that supplies pressure to the service bus, and at startup
The received power from the transmission line is transformed to convert the received power from both nuclear power plants
Start-up transformer to supply to the emergency bus and each nuclear power plant
The external power supply was lost and the power supply to the emergency bus
The emergency power that was activated and generated when the
Nuclear power plant equipped with an emergency power supply that supplies power to the bus
Connected to the above-mentioned emergency bus in the on-site power supply facility
Circuit breaker of one of the nuclear power plants
Turned on when both emergency power supplies failed to start up.
Connect the emergency busbars of the power station to connect the other nuclear power station
From one of the nuclear power plants to the emergency bus
A nuclear power plant characterized by having a circuit breaker for supplying
Runt power supply facility. 13. A switchgear busbar connected to a power transmission line,
Each of the two nuclear power plants whose output is connected to the switchyard bus
Generators, service buses and emergency
Change the generator output at each power plant and each nuclear power plant.
On-site transformer that supplies pressure to the service bus, and at startup
The received power from the transmission line is transformed to convert the received power from both nuclear power plants
Start-up transformer to supply to the emergency bus and each nuclear power plant
The external power supply was lost and the power supply to the emergency bus
The emergency power that was activated and generated when the
Nuclear power plant equipped with an emergency power supply that supplies power to the bus
Of the nuclear power source of either
When the emergency power supply at the power station fails to start,
Connect the emergency buses of the power plant to connect the other nuclear power
From the power station to the emergency bus of the one nuclear power plant
A nuclear power plant characterized by having a communication circuit for supplying
On-site power supply equipment for power plants.