JPH0874514A - Auxiliary power supply facility of steam turbine plant - Google Patents

Abstract

PURPOSE: To secure electric power inside a plant continuously from the normal operation even in generation of abnormality. CONSTITUTION: A steam turbine plant is provided with a condenser 12 for condensing steam from a steam turbine into water, and a cooling water pump 18 for supplying seawater pumped from the sea 1 as cooling water to the condenser 12. The condenser 12 is installed on high ground along the sea. A water storage tank 13 is installed on a hillside of the high ground. The condenser and the water storage tank are connected to each other by an upstream side discharge line 24 through which cooling drain from the condenser is to be guided into the water storage tank. Moreover, a downstream side discharge line 25 for returning the cooling drain in the storage tank is connected to the water storage tank. A water turbine 17 is provided on this downstream side discharge line, and a water turbine generator 37 is connected to this water turbine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam turbine plant equipped with a steam turbine and a condenser for returning steam exhausted from the steam turbine to water, the steam turbine and the condenser comprising: The present invention relates to an auxiliary power supply facility for a steam turbine plant which is set at a position higher than a storage source of cooling water supplied to the condenser.

[0002]

2. Description of the Related Art Generally, nuclear power plants are often installed along the sea. In such a nuclear power plant, a series of facilities such as a reactor, a steam turbine, and a condenser are installed on a hill along the sea. In addition, a cooling water pump for pumping seawater as cooling water to a condenser is installed at the seaside.

Conventionally, in a plant of this type, there is one which utilizes hydraulic energy for returning cooling waste water from a condenser to the sea as an auxiliary power source in the plant.
No. 105 publication. Specifically, this auxiliary power supply facility is to install a turbine in a water discharge line for guiding the cooling water from the condenser to the sea, and drive the turbine generator with this turbine. However, in this conventional technology, when the external power source is lost or the main generator driven by the steam turbine is stopped and power cannot be supplied from these sources, the cooling water pump stops and cooling drainage stops flowing. , I will not be able to get power from the turbine generator. Therefore, in the related art, a storage battery or the like is provided in order to secure the electric power in the plant in such a case.

[0004]

Generally, since water turbines and water turbine generators are expensive, it is desirable to use them as effectively as possible. However, the conventional technique has a problem in that the turbine and the turbine generator cannot be used in an abnormal state.

The present invention has been made by paying attention to such a conventional problem, and improves the utilization efficiency of the water turbine and the water turbine generator so that the main power generation driven by the steam turbine or when the external power source is lost. It is an object of the present invention to provide an auxiliary power supply facility that can obtain electric power in a plant even when the machine stops.

[0006]

The auxiliary power supply equipment of the steam turbine plant for achieving the above object is provided at a position lower than the condenser and higher than the water surface of the water storage source. A water tank for temporarily storing the cooling water in which the steam is cooled (hereinafter, referred to as cooling drainage water); and an upstream water discharge line for guiding the cooling drainage water from the condenser to the water storage tank, A downstream side discharge line that guides the cooling wastewater in the water storage tank from the water storage tank to the water storage source, and a position lower than the water storage tank and higher than the water surface of the water storage source in the middle of the downstream side water discharge line. A water turbine provided and driven by the cooling drainage flowing in the downstream water discharge line;
A water turbine generator that generates power by driving the water turbine, and a cooling drainage cutoff unit that is provided in the downstream side water discharge line and stops the flow of the cooling drainage water in the downstream side water discharge line,
The downstream side water discharge line is configured such that when the flow of the cooling drainage water in the downstream side water discharge line is not stopped by the cooling drainage cutoff means, the amount of the cooling waste water flowing in the downstream side water discharge line is the upstream side water discharge line. It is characterized in that it is formed so as to have the same amount as the cooling drainage flowing inside.

Here, a steam turbine plant is a main generator driven by the steam turbine, a main generator main circuit for supplying electric power generated by the main generator to an external power transmission system, and the steam turbine. Of the various equipment in the plant, a regular power supply line for supplying electric power from the main generator to the equipment stopped when the electric power flowing through the main generator main circuit is abnormal, and the regular power supply Emergency power supply line connected to a power line for supplying power to various devices in the steam turbine plant that cannot be stopped even when the power flowing through the main generator main circuit is abnormal. In the case where the auxiliary power supply facility is provided, the auxiliary power supply facility is a turbine power supply line for supplying the electric power generated by the turbine generator to the emergency power supply line, and the electric power flowing through the main generator main circuit. A power abnormality detector for detecting an atmospheric, the abnormality by the power abnormality detector is detected, it is preferable that a circuit breaker to cut the connection between the commercial power line and the emergency power supply line.

Further, the auxiliary power supply facility of the steam turbine plant is further activated when an abnormality is detected by the emergency generator for supplying electric power to the emergency power supply line and the power abnormality detector, and Testing whether the internal combustion engine capable of changing the drive amount of the emergency generator according to the supply amount and the electric power generated by the emergency generator and the electric power generated by the turbine generator are synchronized The flow rate of the fuel supplied to the internal combustion engine is adjusted so that both the electric power generated by the emergency generator and the electric power generated by the water turbine generator are not synchronized with each other. And a fuel adjusting means.

Further, a liquid level gauge may be provided in the water storage tank, and the cooling / drainage blocking means may be operated in response to a signal from the liquid level gauge.

[0010]

[Function] The cooling water pumped from the water storage source by the cooling water pump exchanges heat with the steam exhausted from the steam turbine in the condenser, and then is used as cooling drainage from the condenser through the upstream water discharge line. , To the water tank. In order to prevent cooling drainage from flowing from the water storage tank to the downstream water discharge line, the downstream water discharge line is temporarily closed by the cooling drainage blocking means, and the cooling wastewater is stored in the water storage tank. When the cooling drainage is accumulated in the water storage tank to some extent, the cooling drainage blocking means opens the downstream water discharge line so that the cooling drainage flows from the water storage tank to the downstream water discharge line. When the cooling drainage flows into the downstream water discharge line, the water turbine is driven and power is generated by the water turbine generator. After that,
While the cooling water is being supplied to the condenser, the turbine generator will continue to generate electricity. Therefore, normally, the electric power from the turbine generator can be used.

By the way, when the cooling drainage blocking means does not stop the flow of cooling drainage in the downstream discharge line, the amount of cooling drainage flowing in the downstream discharge line is equal to the amount of cooling drainage flowing in the upstream discharge line. Therefore, while the cooling water is being supplied to the condenser, the cooling drainage amount in the water tank is maintained at the initially stored cooling drainage amount. Therefore, even if the cooling water is not supplied to the condenser, that is, even in an emergency, the cooling drainage flows from the water storage tank to the water turbine through the downstream discharge line for a while. Therefore, the electric power can be continuously used from the turbine generator from the normal time.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below with reference to FIG.
~ It demonstrates by FIG. As shown in FIG. 1, the steam turbine power plant of this embodiment is provided along the sea and has a steam turbine system and a power supply system.

The steam turbine system includes a reactor 10 for generating steam, a steam turbine 11 driven by steam from the reactor 10, a condenser 12 for returning steam exhausted from the steam turbine 11 to water, and seawater. A cooling water pump 18 that pumps water as cooling water from the sea 1 and supplies it to the condenser 12;
A water tank 13 for temporarily storing cooling water (hereinafter, referred to as cooling drainage) in which steam is cooled in 2 and a water wheel 17 driven by the cooling drainage are provided. Of the above steam turbine system equipment, the reactor 10, the steam turbine 11,
The condenser 12 is installed on a hill along the sea. The water tank 13 is located at a position higher than the sea level and lower than the condenser 12,
In other words, it is installed near the hillside. Further, the water turbine 17 is provided at a position higher than the sea level and lower than the water tank 13.

The reactor 10 and the steam turbine 11 are connected by a main steam line 21 for guiding the steam generated in the reactor 10 to the steam turbine 11. The condenser 12 includes a tube 12b through which cooling water passes, and the tube 12b.
b is housed therein and has a casing 12a through which steam from the steam turbine 11 passes. The condenser 12 and the nuclear reactor 10 are connected by a water supply line 22 for sending condensed water in the casing 12 a of the condenser 12 to the nuclear reactor 10. Although not shown, the water supply line 22 is provided with a water heater, a deaerator, a water pump, and the like. The tube 12b of the condenser 12 has a cooling water supply line 23 for guiding seawater as cooling water to the tube 12b.
Is connected. The cooling water pump 18 described above is provided in the cooling water supply line 23. The condenser 12 and the water storage tank 13 are the upstream water discharge line 2 for guiding the cooling waste water from the tube 12 b of the condenser 12 to the water storage tank 13.
Connected with 4. At the bottom of the water tank 13, the water tank 13
Downstream water discharge line 25 for guiding the cooling drainage inside to the sea 1
Is connected. In the downstream side water discharge line 25, a cooling drainage cutoff valve 16 for stopping cooling drainage flowing therein,
The above-mentioned water wheel 17 driven by this cooling drainage is provided. The downstream side water discharge line 25 is the downstream side water discharge line 2
When the flow of cooling drainage in 5 is not stopped by the cooling drainage shutoff valve 16, the amount of cooling drainage flowing in the downstream side discharge line 25 becomes the same as the amount of cooling drainage flowing in the upstream side discharge line 24. As described above, the pipe resistance, the turbine resistance, and the water pressure received from the water storage tank 13 are taken into consideration.
The water tank 13 is provided with a liquid level gauge 14 for measuring the amount of cooling drainage therein. A valve drive mechanism 15 that drives this valve body in response to a signal from the liquid level gauge 14 is attached to the cooling drainage shutoff valve 16. The liquid level gauge 14 is preset with an upper limit value and a lower limit value of the cooling drainage water in the water storage tank 13, and when the upper limit value is detected, the valve drive mechanism 1 is detected.
5, a valve open signal is output to the valve 5, and when this lower limit value is detected, a valve close signal is output to the valve drive mechanism 15.

The power supply system includes a main generator 31 driven by the steam turbine 11, a water turbine generator 37 driven by the water turbine 17, a diesel generator 30, and a diesel engine 32 for driving the diesel generator 30. When the main generator main circuit 40 for supplying the electric power from the main generator 31 to the power transmission system 41 outside the plant and the electric power flowing through the main generator main circuit 40 among various devices in the plant are abnormal. The main power generator main circuit 4 of various equipment in the plant, and the main power supply bus 42 for supplying the electric power from the main generator 31 to the stopped equipment (hereinafter, referred to as the normal equipment).
There is provided an emergency power source bus 43 for supplying power to a device that cannot be stopped even if there is an abnormality in the power flowing through 0 (hereinafter referred to as emergency device 47). Note that, as the common equipment, specifically, there is a motor of the cooling water pump 18 or the like. Further, as the emergency equipment, a control device for controlling the nuclear reactor 10, the steam turbine 11, the main generator 31, and the like, and the steam turbine 11 and the main power generator due to an abnormality in the power flowing through the main generator main circuit 40. There are devices and the like for safely stopping the machine 31 and the like.

In the main generator main circuit 40, a generator protection relay (power abnormality detector) 34 that operates when there is an abnormality in the power flowing through it, and the power from the main generator 31 up to the system voltage. A main transformer 35 for boosting the voltage is provided.
The utility power bus 42 is provided with an in-plant transformer 36 that steps down the power from the main generator 31 to a voltage corresponding to the equipment in the plant. The regular power source bus 42 and the emergency power source bus 43 are connected by a connecting line 48. The connection line 48 is provided with a power source bus line connection breaker 44 for cutting off the electric power passing therethrough. The emergency power supply bus 43 is supplied with electric power from the water turbine generator 37 to the emergency power supply bus 43, and electric power from the diesel generator 30 is supplied to the emergency power supply bus 43. Diesel power supply line 49b for
Are respectively connected via circuit breakers (turbine power circuit breaker 46, diesel power circuit breaker 45). The diesel power supply line 49b is connected to a diesel voltage relay 39 that operates when the diesel generator 30 completes starting and the voltage of the electric power flowing therethrough reaches the rated voltage. Turbine power supply line 49a and diesel power supply line 49
A synchronization verifier 38 that verifies whether or not the electric power generated by the turbine generator 37 and the electric power generated by the diesel generator 30 are synchronized is connected to b.

A fuel line 33a for supplying fuel to the diesel engine 32 is connected to the diesel engine 32.
The fuel line 33a is provided with a governor 33 for manually adjusting the flow rate of fuel passing therethrough. When the load of the diesel generator 30 connected to the diesel engine 32 changes, the governor 33 has a function of adjusting the fuel flow rate according to this load. Although the manual governor 33 is used here, an automatic governor that automatically adjusts the flow rate of the fuel passing through the fuel line 33a in response to a signal from the synchronization verifier 38 may be used instead. . Further, a diesel engine starting compressed air tank 32a (FIG. 2) that starts compressed air by injecting the compressed air into the diesel engine 32 is attached to the diesel engine 32.

In the present embodiment, the auxiliary power supply facility 50 for securing the necessary electric power in the plant when the main generator 31 is stopped or external power is not supplied via the power transmission system 41 is used. , Upstream water discharge line 24, water storage tank 13, liquid level gauge 14, downstream water discharge line 25, valve drive mechanism 15, cooling drainage shutoff valve 16, water turbine 17, water turbine generator 3
7, turbine power supply line 49a, turbine power breaker 46, diesel engine 32, governor 33, diesel engine starting compressed air tank 32a, diesel generator 30, diesel power supply line 49b, diesel power breaker 4
5, a diesel voltage relay 39, a synchronization verifier 38, a power supply busbar connection breaker 44, a generator protection relay 34, and a control circuit described later. However, in FIG. 1, the generator protection relay 34 is not drawn within the frame of reference numeral 50 indicating the auxiliary power supply facility for the purpose of drawing.

As shown in FIG. 2, the control circuit of the auxiliary power supply facility 50 has a contact a which is closed by the operation of the generator protection relay 34.
An auxiliary relay that operates when the contact a is closed, a contact b that closes by the operation of the auxiliary relay, and an electromagnetic valve for starting the diesel engine starting compressed air tank 32a that opens when the contact b closes and a power supply busbar. Connection breaker 44
Auxiliary relay to open the relay and diesel voltage relay 39
The contact c closed by the operation of, the contact d closed when the synchronization verifier 38 recognizes the synchronization, the auxiliary relay for turning on the diesel power breaker 45 when the contact c and the contact d are closed, and the valve closing from the liquid level gauge 14. A contact e that closes when a signal is received,
It has an auxiliary relay that opens the turbine power breaker 46 when this contact e is closed.

Next, the operation of the steam turbine power plant of this embodiment will be described. Normally, the power busbar connection breaker 44 and the turbine power breaker 46 are closed, and the diesel power breaker 45 is open. Further, the cooling drainage cutoff valve 16 is open. In addition, the diesel engine 32 and the diesel generator 30 are not used because they are used in an emergency.

The steam generated in the nuclear reactor 10 is supplied to the steam turbine 11 via the main steam line 21. When the steam turbine 11 is driven by this steam, the main generator 31 generates power. The electric power from the main generator 31 is sent to the external power transmission system 41 via the main generator main circuit 40 and the main transformer 35, and also via the in-plant transformer 36 to the regular power supply bus 4
2 and the emergency power supply bus 43.

The seawater as the cooling water is the cooling water pump 18
Is pumped up from the sea 1 and sent through the cooling water supply line 23 into the tube 12b of the condenser 12. The steam exhausted from the steam turbine 11 enters the casing 12a of the condenser 12 and exchanges heat with the cooling water flowing in the tube 12b of the condenser 12 to become water. This water returns to the reactor 10 via the water supply line 22. When the cooling water in the tube 12b of the condenser 12 heats up by exchanging heat with the steam, the cooling water flows down from the condenser 12 to the water storage tank 13 via the upstream water discharge line 24 as cooling drainage.

By the way, when the steam turbine 11 is started, the cooling drainage shutoff valve 16 is closed. When the steam turbine 11 and the cooling water pump 18 are activated and cooling drainage starts to be discharged from the condenser 12, the cooling drainage gradually accumulates in the water tank 13. When the cooling drainage in the water storage tank 13 reaches the set upper limit value, the liquid level gauge 14 detects this and outputs a valve open signal to the valve drive mechanism 15. Valve drive mechanism 15
Upon receiving the valve opening signal, drives the valve element to open the valve 16. Then, the cooling drainage in the water storage tank 13 passes through the downstream side water discharge line 25 and the water wheel 17 provided therein,
Run down to the sea 1. Since the amount of cooling water flowing in the upstream side water discharge line 24 and the amount of cooling water flowing in the downstream side water discharge line 25 are usually the same, the amount of cooling drainage water in the water storage tank 13 is almost maintained near the set upper limit value.

The cooling waste water flowing in the downstream water discharge line 25 drives the water wheel 17. When this water wheel 17 drives,
The water turbine generator 37 generates electricity. Electric power from the turbine generator 37 is supplied to the turbine power supply line 49a and the turbine power breaker 46.
It is supplied to the emergency power supply bus 43 through the (closed state).

Next, the operation when the external power is lost or the steam turbine 11 or the main generator 31 fails and the power supply from the main generator 31 cannot be expected will be described with reference to the flowchart shown in FIG. . When the external power is lost or the steam turbine 11 or the main generator 31 fails, the power flowing through the main generator main circuit 40 becomes abnormal, and the generator protection relay 34 operates (step 1).
When the generator protection relay 34 operates, the steam turbine 11
And the main generator 31 is stopped immediately. As a result, no electric power is supplied from the main generator 31 to the regular power source bus 42 or the emergency power source bus 43. Therefore, the regular power supply bus bar 42
The motor 19 of the cooling water pump 18 that receives electric power from the motor stops, and the cooling water pump 18 stops. Therefore, the condenser 12
The cooling drainage is no longer discharged from the water tank 13 to the water storage tank 13. However,
Since the amount of cooling drainage that is close to the set upper limit value is stored in the water tank 13, the water turbine 17 continues for a while.
Is driven, and the electric power from the turbine generator 37 is supplied to the emergency power source bus 43.

Further, when the generator protection relay 34 operates, the diesel engine 32 and the diesel generator 30
Is started (step 2), and the power busbar connection breaker 44 is opened (step 3). Here, this operation will be described in detail. When the generator protection relay 34 operates, the contact a of the control circuit shown in FIG. 2 closes and the auxiliary relay operates. By the operation of this auxiliary relay, contact b
Is closed and the auxiliary relay operates. By the operation of this auxiliary relay, diesel engine starting compressed air tank 3
The starting solenoid valve 2a is opened and the diesel engine 3
2 is started, and the power busbar connection breaker 44 is opened. By opening the power supply busbar connection breaker 44, the normal power supply busbar 42 and the emergency power supply busbar 43 are not electrically connected to each other, and the power from the water turbine generator 37 is supplied only to the emergency power supply busbar 43. Will be done.

When the power from the diesel generator 30 reaches the rated voltage for the first time when the diesel generator 30 is driven,
Assuming that the startup of the diesel generator 30 is completed, the diesel voltage relay 39 operates (step 4). By the operation of the diesel voltage relay 39, the contact c of the control circuit is closed. The synchronization verifier 38 compares the electric power from the turbine generator 37 with the electric power from the diesel generator 30,
Verify whether both powers are synchronized. If they are not synchronized, the governor 33 of the diesel engine 32 is operated to adjust the amount of fuel supplied to the engine 32. Due to the adjustment of the fuel amount, the driving amounts of the diesel engine 32 and the diesel generator 30 are changed, and the turbine generator 37
When the electric power from the diesel generator 30 is synchronized with the electric power from (step 5), the contact d of the control circuit is closed. When the contacts c and d are closed, the auxiliary relay operates and the diesel power circuit breaker 45 is turned on (step 6).
As a result, not only the electric power from the turbine generator 37 but also the electric power from the diesel generator 30 is supplied to the emergency power bus 43. The operation from the generator protection relay 34 (step 1) to the turning on of the diesel power breaker 45 (step 6) is completed in several tens of seconds. afterwards,
For a while, the turbine generator 3 is connected to the emergency power bus 43.
7 and the diesel generator 30 supply electric power.

When the amount of cooling drainage in the water storage tank 13 decreases and the amount reaches the set lower limit value, the liquid level gauge 14 detects this and sends a valve closing signal to the valve drive mechanism 15 and the contact e of the control circuit. Output (step 7). When the contact point e receives this valve closing signal, the auxiliary relay operates and the turbine power breaker 4
6 is opened (step 9), and the electric power from the turbine generator 37 is not supplied to the emergency power source bus 43. When the valve drive mechanism 15 receives the valve closing signal, the valve drive mechanism 15 operates to close the cooling drainage cutoff valve 16 (step 8). As a result, the cooling water stops flowing from the water storage tank 13 to the water wheel 17, so that the water wheel 17 and the water wheel generator 37 are stopped (step 10).

As described above, in this embodiment, the in-plant electric power can be secured by the water turbine 17, the water turbine generator 37, the diesel engine 32, and the diesel generator 30. In particular, the water turbine 17 continues to be driven for a while not only in a normal state but also in an extremely severe state, so that power cannot be supplied from the main generator 31 or an external power source without a storage battery or the like. It is possible to secure the electric power to be supplied to the emergency power supply bus 43 from the time until the diesel generator 30 can supply the electric power. In addition, the turbine generator 37 is used to drive the diesel generator 30.
Since the load can be reduced, the diesel engine 32 and the diesel generator 30 can be downsized. This is because the electric power flowing through the main generator main circuit 40 of the emergency equipment 47 is abnormal and the main generator 31
Equipment for safely stopping etc. (emergency power bus 43
Connected to. This is because it is not necessary for the diesel generator 30 to supply the electric power required for activating (1). Further, in the present embodiment, the turbine 17 is driven even in the normal time and the electric power is supplied from the turbine generator 37 to the equipment in the plant. Therefore, the amount of electric power supplied from the main generator 31 to the equipment in the plant is The amount of power transmission from the main generator 31 can be increased, and the capacity of the main generator 31 can be increased.

In this embodiment, the cooling water is pumped from the sea 1, but the present invention is not limited to this, and instead of the sea 1, a lake, a reservoir or a water tank may be used. Good. Further, the present invention can be applied to any thermal power plant or nuclear power plant as long as the plant has a steam turbine.

[0031]

According to the present invention, in a normal state, while maintaining the state where the cooling drainage is stored in the water storage tank, the cooling water drainage from the water storage tank drives the water turbine to generate electricity by the turbine generator. Therefore, even in an emergency when the cooling drainage does not flow into the water storage tank, the turbine is driven by the cooling drainage stored in the water storage tank for a while, and the turbine generator continues to generate electricity. Therefore, even if there is no storage battery or the like, it is possible to secure the in-plant power in an emergency following the normal time.

[Brief description of drawings]

FIG. 1 is a system diagram of a steam turbine power plant according to an embodiment of the present invention.

FIG. 2 is a control circuit diagram of an auxiliary power supply facility according to an embodiment of the present invention.

FIG. 3 is a flowchart showing an operation of the auxiliary power supply facility according to the embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Sea, 10 ... Reactor, 11 ... Steam turbine, 12 ... Condenser, 13 ... Water tank, 14 ... Level gauge, 15 ... Valve drive mechanism, 16 ... Cooling drainage shutoff valve, 17 ... Water wheel, 18 ... Cooling water pump, 23 ... Cooling water supply line, 24 ... Upstream water discharge line, 25 ... Downstream water discharge line, 30 ... Diesel generator, 31 ... Main generator, 32 ... Diesel engine, 33
… Governor, 34… Generator protection relay, 37… Turbine generator, 38… Synchronous tester, 39… Diesel voltage relay,
40 ... Main generator main circuit, 41 ... Power transmission system, 42 ... Regular power supply bus bar, 43 ... Emergency power supply bus bar, 44 ... Power bus connection breaker, 45 ... Diesel power breaker, 46 ... Water turbine power breaker, 47 ... Emergency equipment, 48 ... Connection line, 49a ... Turbine power supply line, 49b ... Diesel power supply line, 50 ... Auxiliary power supply facility.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Mikami 3-2-1, Sachimachi, Hitachi City, Ibaraki Prefecture Inside Hitachi Engineering Co., Ltd.

Claims (3)

[Claims] 1. A steam turbine driven by steam, a condenser for cooling the steam exhausted from the steam turbine to return it to water, and a water storage source for storing cooling water for cooling the steam in the condenser. A cooling water pump for pumping the water from the water source, and in the auxiliary power supply equipment of the steam turbine plant in which the condenser is installed at a position higher than the storage source, at a position lower than the condenser and above the water surface of the storage source. And a water tank for temporarily storing the cooling water that cools the steam in the condenser (hereinafter, referred to as cooling drainage water), and the cooling drainage water from the condenser. An upstream water discharge line that leads to the water storage tank, a downstream water discharge line that guides the cooling wastewater in the water storage tank from the water storage tank to the water storage source, and a position lower than the water storage tank in the middle of the downstream water discharge line. And the water from the reservoir A turbine provided at a position higher than the surface, driven by the cooling drainage flowing in the downstream water discharge line, a turbine generator that generates power by driving the turbine, and the downstream water discharge provided in the downstream water discharge line A cooling drainage cutoff means for stopping the flow of the cooling drainage in the line, wherein the downstream side discharge line is not stopped by the cooling drainage cutoff means in the downstream dischargeline Is formed so that the amount of the cooling drainage flowing in the downstream side discharge line is the same as the amount of cooling drainage flowing in the upstream side discharge line. . 2. The steam turbine plant includes a main generator driven by the steam turbine, a main generator main circuit for supplying electric power generated by the main generator to an external power transmission system, and the steam turbine. Of the various equipment in the plant, a regular power supply line for supplying electric power from the main generator to the equipment stopped when the electric power flowing through the main generator main circuit is abnormal, and the regular power supply Emergency power supply line connected to a power line for supplying power to various devices in the steam turbine plant that cannot be stopped even when the power flowing through the main generator main circuit is abnormal. The auxiliary power supply facility includes a turbine power supply line for supplying the power generated by the turbine generator to the emergency power line, and an abnormality in the power flowing through the main generator main circuit. To And a circuit breaker that disconnects the emergency power line and the normal power line when an abnormality is detected by the power abnormality detector. Item 1. An auxiliary power supply facility for a steam turbine plant according to Item 1. 3. An emergency generator for supplying electric power to the emergency power supply line, and starting when an abnormality is detected by the power abnormality detector,
Whether the internal combustion engine capable of changing the drive amount of the emergency generator according to the fuel supply amount and the electric power generated by the emergency generator and the electric power generated by the water turbine generator are synchronized with each other And a synchronous calibrator for verifying that the power generated by the emergency generator and the power generated by the water turbine generator are not synchronized, so that the two powers are synchronized, the flow rate of the fuel supplied to the internal combustion engine is adjusted. The auxiliary power supply equipment for a steam turbine plant according to claim 2, further comprising: a fuel adjusting means for adjusting.