JP3207646B2 - Emergency power interchange board and power system for nuclear power plants - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an emergency power supply in a nuclear power plant having a plurality of power generation units,
In particular, the emergency power supply interchange board of the nuclear power plant corresponding to the failure of starting the diesel power generation equipment on the emergency bus, and
Power supply system .

[0002]

2. Description of the Related Art A conventional emergency power supply device to which an emergency auxiliary device is connected in a nuclear power plant having a plurality of power generation units is shown in FIG. The switching station 2 connected to the transmission line 1 is supplied with power generated by the respective main generators 4 via the main transformer 5 for each of the plurality of power generation units 3a and 3b connected to the bus. Transmit power to customers.

When the main generator 4 is stopped,
The power required for maintaining the power plant is supplied to the common bus 7, the service bus 8 and the emergency bus 9 via the starting transformer 6, and the auxiliary buses (not shown) connected to the respective buses 7, 8, 9 are provided. Drive the machine. When the main generator 4 is in operation, the electric power generated by the main generator 4 is supplied to the service bus 8 via the in-house transformer 10. At this time, the service bus 8 and the common bus 7 are used. Is separated from the circuit breaker 11 because the circuit breaker 11 is tripped.

[0004] The power generation unit 3a,
If an emergency state occurs in 3b, the diesel power generation equipment 12 connected to the emergency bus 9 of each of the power generation units 3a and 3b is automatically activated by an emergency state detection signal, and is connected to the emergency bus 9. It is configured to operate an emergency accessory (not shown) to safely stop the nuclear reactor.

Further, when the emergency state occurs, the diesel power generation equipment 12 and the emergency auxiliary equipment cannot be operated, so that the two or more power generation units 3a and 3b are not affected so that the emergency power supply unit is not affected. Represents each power generation unit 3a,
It is installed every 3b.

[0006]

In the conventional emergency power supply unit, when each of the diesel power generation equipments 12 cannot be operated, besides repairing the faulty part immediately and starting it, the power generation units 3a and 3b are not required. I can't drive. That is, the emergency bus 9 to which the diesel power generation equipment 12 is connected
Cannot be powered by others and therefore
The power generation unit is an emergency bus 9 to which a healthy diesel power generation unit 12 operated by another power generation unit is connected.
The safety stop is performed by the operation of the emergency auxiliary equipment connected to.

In this case, a great deal of labor is required for urgently confirming the failure location of the defective diesel power generation equipment 12 and repairing and restoring, and a burden is imposed on the operation and monitoring for safely stopping the reactor. There was a defect.

It is an object of the present invention to provide an emergency power interchange device between a plurality of power generation units, and to transfer an emergency power generation unit of a healthy diesel power generation facility to an emergency bus of a diesel power generation facility that cannot be started. It is an object of the present invention to provide an emergency power interchange device for a nuclear power plant that interchanges electric power.

[0009]

In order to achieve the above object, an emergency power interchange board according to the first aspect of the present invention comprises a main transformer.
Connected to the switchyard bus via this main transformer
The main generator, emergency power generation equipment, and this emergency power generation equipment
In an emergency power interchange board provided in a nuclear power plant having a plurality of power generation units each including a connected emergency bus, each is provided in connection with the emergency bus of each power generation unit, manually It is characterized by having an operable interchangeable circuit breaker, and an interchangeable bus bar provided in connection with these interchangeable circuit breakers and communicating with the emergency buses.

[0010] An emergency power interchange board according to the second aspect of the present invention comprises a main transformer and a bus of a switchyard via the main transformer.
The main generator connected to the
In an emergency power interchange board provided in a nuclear power plant having a plurality of power generation units each including an emergency bus connected to a power generation facility, the power bus is connected to the emergency bus of each of the power generation units. A plurality of manually operable first breaker breakers, a flexible transformer for introducing power from the switchyard and a second manually operable breaker, the first and second flexible circuit breakers; An accommodating bus that is provided in connection with the accommodating circuit breaker and communicates with the emergency bus,
Having the following.

The emergency power interchange board according to the third aspect of the present invention comprises a main transformer and a bus of a switchyard via the main transformer.
The main generator connected to the
In an emergency power interchange board provided in a nuclear power plant having a plurality of power generation units each including an emergency bus connected to a power generation facility, the power bus is connected to the emergency bus of each of the power generation units. A plurality of manually operable first breaker breakers, a second manually operable breaker connected to a spare bus of a spare power supply facility provided separately from the power generation unit, and A connecting bus provided for connection with the second interchangeable circuit breaker and interconnecting the emergency buses.

According to a fourth aspect of the present invention, there is provided a power supply system for a nuclear power plant, comprising: a main transformer;
Main generator connected to the closed bus and emergency power generation equipment
And the emergency bus to which this emergency power generation equipment is connected.
A plurality of power generating unit including a respectively, the respectively provided connected to the emergency bus for each power unit, arranged in connection with manually operable flexibility breaker, these interchange breaker wherein An emergency power supply board having an accommodation bus for interconnecting the emergency buses with each other is provided.

[0013]

[Action] Generally, it is emergency in a nuclear power plant having a power generating unit of the multiple, when stopping the reactor in each power generation unit, the diesel power plants for emergency installed in power generating unit does not start, the Safe shutdown of the reactor becomes difficult. The invention described in each claim addresses this
Is what you do. According to the first aspect of the present invention, at this time, in the emergency power interchange board, the interchangeable circuit breaker connected to the emergency bus of the power generation unit in which the diesel power generation equipment does not start and the emergency bus of the power generation unit of the healthy diesel power generation equipment are connected. When the connected breaker is turned on, the emergency power generated by the healthy diesel power generation equipment is supplied to the emergency bus of the power generation unit in which the diesel power generation equipment does not start up via the interchange power bus. Thereby, the emergency auxiliary machine connected to the emergency bus of the power generation unit in which the diesel power generation equipment does not start is operated, and the reactor is safely stopped.

According to the second aspect of the present invention,
Like the invention, the first flexible circuit breaker diesel power plant connected to the emergency bus for power generating unit does not start, and the first flexible circuit breaker connected to the emergency bus for power generating unit of sound diesel power plants The emergency power generated by the healthy diesel power generation equipment is supplied to the emergency bus of the power generation unit in which the diesel power generation equipment does not start up through the interchange bus.

[0015] In addition, in the case where a power generation unit was installed sound diesel power generation equipment to the other in a periodic inspection or the like is not in operation, the Te emergency power supply flexible panel smell, the second of which is connected to the melt through a transformer When the interchangeable circuit breaker is turned on, emergency power is supplied from the interchangeable transformer via the interchangeable bus to the emergency bus of the power generation unit in which the diesel power generation equipment does not start.

In any of the above cases, the emergency auxiliary machine connected to the emergency bus of the power generation unit whose diesel power generation equipment does not start is operated, and the reactor is safely shut down.

[0017] In the present invention of claim 3, wherein, according to claim 1, wherein
Similarly to the invention, in the emergency power interchange board, the first interchangeable circuit breaker connected to the emergency bus of the power generation unit where the diesel power generation equipment does not start and the emergency power supply bus connected to the power generation unit of the healthy diesel power generation equipment are connected When the first interchangeable circuit breaker is turned on, the emergency power generated by the healthy diesel power generation equipment is supplied to the emergency bus of the power generation unit in which the diesel power generation equipment does not start up via the interchange power bus.

Further, when the power generation unit installed sound diesel power plant to another in the periodic inspection or the like is not operated, the second fusion <br/> through introducing a pre generatrix of the pre備電source equipment Turn on the breaker.

As a result, emergency power is supplied from the standby power supply to the emergency bus of the power generation unit in which the diesel power generation equipment does not start up via the interchange bus. In any of the above cases, the emergency auxiliary machine connected to the emergency bus of the power generation unit in which the diesel power generation equipment does not start is operated, and the reactor is safely shut down.

According to the fourth aspect of the present invention, there is provided the first aspect of the present invention.
As with the invention, the emergency power switchboard
Connected to the emergency bus of the power generation unit where the power generation equipment does not start
Interchangeable circuit breaker and power generation unit
Turn on the breaker connected to the knit emergency bus
Emergency power generated by healthy diesel power generation equipment
Diesel power generation facility does not start via the interchange bus
It is supplied to the emergency bus of the power unit . This allows
Emergency mother of power generation unit that does not start diesel power generation equipment
Line connected to emergency auxiliary It has been operated on, cheap reactor
A complete stop is performed .

[0021]

An embodiment of the present invention will be described with reference to the drawings. The same components as those of the above-described conventional technology are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the first embodiment, as shown in the system configuration diagram of FIG. 1, a switching station 2 connected to a transmission line 1 has a plurality of power generating units 3a and 3b connected to its bus. The power generation units 3 a and 3 b include a main generator 4, a main transformer 5 which boosts the power generated by the main generator 4 and supplies the boosted power to the customer via the switchyard 2 and the transmission line 1, and a main power generator 5. When the power plant 4 is stopped, the switching station 2
A starting transformer 6 and a common bus 7 are installed.

The common bus 7 has a communication breaker 11
Service bus 8 connected to an on-site transformer 10 for supplying on-site power while the main generator 4 is in operation.
And an emergency bus 9 connected to the common bus 7 and connected to a diesel power generator 12 as an emergency power supply.

The plurality of power generation units 3a, 3b
Each of the emergency buses 9 is connected to an emergency auxiliary device (not shown), and the service bus 8 is connected to various auxiliary devices (not shown). When the main generator 4 is operated, the service bus is used. The power generated by the main generator 4 is supplied to the power generator 8 via the in-house transformer 10, but at this time, the service bus 8 and the common bus 7 are disconnected because the communication breaker 11 is tripped. ing.

Further, an emergency power supply board 13 is connected to the emergency bus 9 of the plurality of power generation units 3a and 3b, and the emergency power supply board 13 is connected to the bus 14 for accommodation. It is composed of flexible breakers 15a and 15b,
The emergency bus 9 of the power generation unit 3a is a flexible circuit breaker 15a.
In addition, the emergency bus 9 of the power generation unit 3b is
And are communicated with each other at the accommodation bus 14.

Next, the operation of the above configuration will be described. If an emergency occurs in the power supply configuration of the power generation units 3a and 3b in the nuclear power plant, the diesel power generation equipment 12 connected to the respective emergency bus 9
Automatically starts, and the emergency accessories connected to the emergency bus 9 are operated to safely stop the nuclear reactor. In addition, the emergency bus 9 and the diesel power generation equipment 12 in each of the power generation units 3a and 3b are multiplexed, and even if one diesel power generation equipment 12 cannot be started, the reactor is safely stopped.

Here, it is assumed that the diesel power generation equipment 12 cannot be started for one reason in one power generation unit 3a. At this time, the operator manually turns on the interchangeable circuit breakers 15a and 15b in the emergency power supply interchangeable board 13.

As a result, the emergency bus 9 of the power generation unit 3a in which the diesel power generation equipment 12 cannot be started and the emergency bus 9 of the power generation unit 3b of the adjacent healthy diesel power generation equipment 12 are connected to the power supply of the emergency power interchange board 13. Diesel power generation equipment of the power generation unit 3b which communicates via the interchange bus 14
Since emergency power is transferred from the power supply unit 12 to the emergency bus 9 of the power generation unit 3a, the operation of the emergency auxiliary machine stopped at the power generation unit 3a becomes possible, and the power generation unit 3
The reactor a can be safely shut down.

The adjacent power generating units 3a, 3b
Interchangeable circuit breakers 15a and 15b for accommodating emergency power between
Is performed manually by the operator, it is not possible to operate the emergency power interchange board 13 by an erroneous signal even though the power generation units 3a and 3b are operating normally. Absent.

As a result, the power generation units 3a and 3b are controlled independently, and no adverse effects such as stopping the power generation units depending on the state of the adjacent power generation units 3a and 3b occur.
Further, while emergency power is being supplied to the power generation unit 3a, the repair of the failed diesel power generation equipment 12 can be performed with sufficient time.

In the second embodiment, as shown in the system configuration diagram of FIG. 2, the power generation units 3a, 3b, 3c of the nuclear power plant
In the example where there are more than one unit,
Since the configurations of b and 3c are the same as those of the first embodiment, detailed description will be omitted. Further, each of the power generation units 3a, 3b,
In FIG. 3c, an emergency power supply interchangeable board 16 to which the respective emergency buses 9 are connected is composed of an interchangeable bus 14 and interchangeable circuit breakers 15a, 15b, 15c connected thereto.
When the operator operates the breaker breakers 15a, 15b, 15c, the respective emergency buses 9 can communicate with each other via the interchanger bus 14.

According to the above configuration, when the diesel power generation equipment 12 of the power generation unit 3a cannot be started among the power generation units 3a, 3b, 3c in the emergency state,
The operator can manually operate the breaker 15a and the breaker 15a.
15b or the flexible circuit breaker 15c is selected and supplied.

As a result, the emergency bus 9 of the power generation unit 3a and one of the emergency buses 9 of the power generation unit 3b or the power generation unit 3c having the other normally activated diesel power generation equipment 12 are interchangeable. The plurality of power generation units 3a, 3a,
Emergency power exchange between 3b and 3c is implemented. Therefore, all the power generation units 3a, 3b, 3c can always safely stop.

In the third embodiment, as shown in the system configuration diagram of FIG. 3, the configuration of each of the power generating units 3a and 3b of the nuclear power plant is the same as that of the first embodiment, and the detailed description is omitted.
As for the emergency power interchange board 17, the emergency power interchange board 13 of the first embodiment is provided with an interchange transformer 18 for introducing electric power from the switchyard 2 and stepping down the power, and via the interchange circuit breaker 15 d. And connected to the bus 14 for accommodation.

The operation of the above configuration is as follows. When one of the plurality of power generation units 3a and 3b in the emergency state cannot start the diesel power generation equipment 12, the operator can use the interchangeable circuit breaker as in the first embodiment. 15a and 15b are manually input. As a result, emergency power is exchanged through the interchangeable bus 14 of the emergency power supply interchangeable board 17 to the power generation unit of the diesel power generation facility 12 that cannot be started from the sound power generation unit of the healthy diesel power generation facility 12, and the diesel power generation facility that cannot be started By operating emergency auxiliary equipment in 12 power generation units, the reactor can be safely shut down.

Further , when all the power generating units 3a and 3b are not operating at the time of the periodic inspection or the like, the operator can use the interchangeable circuit breaker 15d of the emergency power supply interchangeable board 17 and the interchangeable circuit breaker 15d.
Power is supplied from the interchangeable transformer 18 to the accommodating bus 14 irrespective of the operation state of the power generation units 3a and 3b by selecting and turning on a and 15b by manual operation.

Thus, since emergency power is exchanged from the interchange bus 14 to the emergency bus 9 of the power generation unit, the operation of the emergency auxiliary machine stopped in the power generation unit becomes possible. In addition, this emergency power interchange board 17
The same effect can be obtained by using a spare power supply (not shown) separately installed in a nuclear power plant. In this case, the interchangeable transformer 18 uses a spare transformer, and the interchangeable bus 14 is a spare power supply panel, so that an excellent economic effect can be obtained.

In the fourth embodiment, as shown in the system configuration diagram of FIG. 4, the power generation units 3a, 3b, 3c of the nuclear power plant
In the case where there are more than one unit and the power transformer 18 is installed on the emergency power interchange board 19, each power generation unit 3a, 3b, 3
The structure of c is the same as that of the first embodiment, and the emergency power interchange board 19
Is the same as that of the third embodiment in which the emergency power supply interchangeable board 17 is provided with the accommodating circuit breaker 15c, and a detailed description thereof will be omitted.

In addition, the operation of this configuration is the same as that of the power generation units 3a, 3b, 3c in the emergency state.
If the diesel power generation equipment 12 of one power generation unit cannot be started, the operator will manually operate the interchange circuit breaker 15
a, 15b, and 15c are selected and input.

As a result, the emergency bus 9 of the power generation unit of the diesel power generation equipment 12 that cannot be started and the emergency bus 9 of the power generation unit having the diesel power generation equipment 12 that has started up normally communicate with each other through the interchange bus 14. Then, the emergency power is exchanged among the plurality of power generation units 3a, 3b, 3c in the emergency state.

Therefore, all the power generation units 3a, 3b,
3c can always safely perform the stop operation. In is al <br/>, in periodic inspection or the like, very from flexible transformer 18 of the emergency power supply flexible board 19 via the power interchange busbar 14 each generating unit 3a, 3b, the emergency bus 9 3c Since the power for use is exchanged, the operation of the emergency auxiliary machine stopped in the power generation unit can be performed . Also, in the emergency power interchange board 19, the same operation can be obtained by diverting the spare power supply equipment in the nuclear power plant as in the third embodiment.

In each of the above-described second and fourth embodiments, three power generation units are installed in the nuclear power plant.
Although the case where the units are installed has been described as an example, it is needless to say that three or more power generation units can be supported by providing the interchangeable circuit breakers corresponding to the number of power generation units in the emergency power supply interchange board.

[0043]

As described above, according to the present invention, in a nuclear power plant equipped with a plurality of power generation units, when the nuclear reactor is shut down in an emergency state, the start-up failure of the emergency diesel power generation equipment occurs. However, there is an effect that emergency power can be easily exchanged from the healthy diesel power generation equipment of another power generation unit to safely stop the nuclear reactor.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of an emergency power supply interchangeable device according to a first embodiment of the present invention.

FIG. 2 is a system configuration diagram of an emergency power supply interchangeable device according to a second embodiment of the present invention.

FIG. 3 is a system configuration diagram of an emergency power supply interchangeable device according to a third embodiment of the present invention.

FIG. 4 is a system configuration diagram of an emergency power supply interchangeable device according to a fourth embodiment of the present invention.

FIG. 5 is a system configuration diagram of a conventional emergency power supply facility.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Transmission line, 2 ... Switching station, 3a, 3b, 3c ... Power generation unit, 4 ... Main generator, 5 ... Main transformer, 6 ... Starting transformer,
7 ... common bus, 8 ... regular bus, 9 ... emergency bus, 10 ...
Station transformer, 11 communication breaker, 12 diesel power generation equipment, 13, 16, 17, 19 ... emergency power interchange board, 14 ... interchange bus, 15a-15d ... interchange circuit breaker, 18 ... interchange transformer.

Claims (4)

(57) [Claims] 1. A main transformer and an opening / closing via the main transformer
Main generator connected to the bus of the station, emergency power generation equipment,
The emergency bus to which this emergency power generation equipment is connected
In an emergency power interchange board provided in a nuclear power plant equipped with a plurality of power generation units provided in it, each provided in connection with the emergency bus of each of the power generation units, a manually operable interchange breaker, And an accommodation bus provided in connection with these accommodation circuit breakers and interconnecting the emergency buses with each other. 2. A main transformer and an opening and closing via the main transformer.
Main generator connected to the bus of the station, emergency power generation equipment,
The emergency bus to which this emergency power generation equipment is connected
An emergency power interchange board provided in a nuclear power plant having a plurality of power generation units provided therein , comprising: a plurality of first manually operable units respectively connected to emergency buses of the respective power generation units. An accommodating circuit breaker; an accommodating transformer for introducing electric power from the switchyard and a manually operable second accommodating circuit breaker; and the emergency service circuit provided in connection with the first and second accommodating circuit breakers. An emergency power interchange board, comprising: an interconnecting bus that connects the buses to each other. 3. A main transformer and an opening and closing via the main transformer.
Main generator connected to the bus of the station, emergency power generation equipment,
The emergency bus to which this emergency power generation equipment is connected
An emergency power interchange board provided in a nuclear power plant having a plurality of power generation units provided therein , comprising: a plurality of first manually operable units respectively connected to emergency buses of the respective power generation units. An accommodating circuit breaker, a manually operable second accommodating circuit breaker connected to an auxiliary bus of an auxiliary power supply facility provided separately from the power generation unit, and provided in connection with the first and second accommodating circuit breakers. And an accommodation bus for communicating the emergency buses with each other. 4. A main transformer and an opening and closing operation via the main transformer.
Main generator connected to the bus of the station, emergency power generation equipment,
The emergency bus to which this emergency power generation equipment is connected
A plurality of power generating unit including Les, the respectively provided connected to the emergency bus for each of the power generation units, and manually operable flexibility breaker, the emergency arranged in connection with these flexible circuit breakers A power supply system for a nuclear power plant, comprising: an emergency power interchange board having an interchange bus communicating with the buses.