Power supply system

Abstract

The invention provides a power supply system which comprises nuclear power generation equipment, a first water conveying pipeline, a second water conveying pipeline, a third water conveying pipeline and a water turbine. The input end of the first water conveying pipeline is communicated with the first reservoir, the output end of the first water conveying pipeline is communicated with the second reservoir, the water level of the first reservoir is lower than that of the second reservoir, and the first water conveying pipeline is provided with a water pump for conveying water in the first reservoir to the second reservoir; the nuclear power generation equipment is electrically connected with the power grid through the first power transmission line, and the second power transmission line is electrically connected with the water suction pump and provided with a first control switch controlling the second power transmission line to be connected or disconnected. The input end of the second water conveying pipeline communicates with the second reservoir, the output end of the second water conveying pipeline communicates with the input end of the water turbine, the output end of the water turbine communicates with the input end of the third water conveying pipeline, and the output end of the third water conveying pipeline communicates with the first reservoir. According to the scheme provided by the embodiment of the invention, the problem of low energy utilization rate caused by fluctuation of a nuclear power plant along with a power grid can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of power system dispatching, and in particular to a power supply system. Background Art

[0002] With the continuous development of science and technology in recent years, the power dispatching system has become more and more important. In the existing technology, when the power users are at peak, the power system load is large; when the power consumption is low, the power system load is small. The reactor power is required to follow the generator power change. This frequent power change will have a certain adverse effect on its operation. Summary of the invention

[0003] The purpose of the embodiment of the present invention is to provide a power supply system that can solve the problem in the prior art that a nuclear power plant may have low energy utilization rate due to power grid fluctuations.

[0004] In order to solve the above-mentioned technical problems, the present invention is achieved as follows:

[0005] An embodiment of the present invention provides a power supply system, including:

[0006] Nuclear power generating equipment, a first water pipeline, a second water pipeline, a third water pipeline and a water turbine;

[0007] The input end of the first water delivery pipeline is in communication with the first water reservoir, the output end of the first water delivery pipeline is in communication with the second water reservoir, the water level of the first water reservoir is lower than the water level of the second water reservoir, and the first water delivery pipeline is provided with a water pump for delivering water in the first water reservoir to the second water reservoir;

[0008] The nuclear power generating equipment is electrically connected to the power grid via a first power transmission line, and the nuclear power generating equipment is electrically connected to the water pump via a second power transmission line, wherein the second power transmission line includes a first control switch for controlling the conduction or disconnection of the second power transmission line;

[0009] The input end of the second water pipeline is connected to the second water reservoir, the output end of the second water pipeline is connected to the input end of the turbine, the output end of the turbine is connected to the input end of the third water pipeline, and the output end of the third water pipeline is connected to the first water reservoir.

[0010] In an embodiment of the present invention, the input end of the first water supply pipeline is connected to the first water reservoir, and the output end of the first water supply pipeline is connected to the second water reservoir. The water level of the first water reservoir is lower than the water level of the second water reservoir. The water level of the second water reservoir can be injected into the nuclear power generation equipment through gravity, thereby achieving the purpose of discharging heat in the nuclear power generation equipment in an emergency situation and ensuring the integrity of the nuclear power generation equipment. A water pump for conveying water from the first water reservoir to the second water reservoir is arranged in the first water transmission pipeline; the nuclear power generating equipment is electrically connected to the power grid through the first transmission line, and is electrically connected to the water pump through the second transmission line; the second transmission line is provided with a first control switch for controlling the second transmission line to be turned on or off; the input end of the second water transmission pipeline is connected to the second water reservoir, the output end of the second water transmission pipeline is connected to the input end of the turbine, the output end of the turbine is connected to the input end of the third water transmission pipeline, and the output end of the third water transmission pipeline is connected to the first water reservoir; when the power supply outside the plant is lost, the turbine power generation can be used as a backup power supply for the nuclear power plant, thereby improving the safety of the power plant, improving the energy utilization rate, and thus increasing the economy of the power plant. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for describing the embodiments of the present invention are briefly introduced below.

[0012] Figure 1 It is a schematic diagram of the structure of a power supply system provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] The terms "first", "second", etc. in the specification and claims of the present invention are used to distinguish similar objects, rather than to describe a specific order or precedence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present invention can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more.

[0015] The present invention provides a power supply system. Figure 1 1 is a schematic diagram of a power supply system structure provided by an embodiment of the present invention, including:

[0016] Nuclear power generation equipment, a first water pipeline a, a second water pipeline c, a third water pipeline d and a turbine 11;

[0017] The input end of the first water pipeline a is in communication with the first water reservoir 13, the output end of the first water pipeline a is in communication with the second water reservoir 10, and the water level of the first water reservoir 13 is lower than the water level of the second water reservoir 10, and the first water pipeline a is provided with a water pump 12 for conveying water in the first water reservoir 13 to the second water reservoir 10;

[0018] The nuclear power generating equipment is electrically connected to the power grid 20 via a first transmission line, and the nuclear power generating equipment is electrically connected to the water pump 12 via a second transmission line b, wherein the second transmission line b includes a first control switch 16 for controlling the second transmission line b to be turned on or off;

[0019] The input end of the second water pipeline c is connected to the second water reservoir 10, the output end of the second water pipeline c is connected to the input end of the turbine 11, the output end of the turbine 11 is connected to the input end of the third water pipeline d, and the output end of the third water pipeline d is connected to the first water reservoir 13.

[0020] The nuclear power generating equipment includes a containment vessel 14, a steam turbine 15 and a generator 17. The first water reservoir 13 can be understood as a downstream reservoir, and the second water reservoir 10 can be understood as an upstream reservoir. The input end of the first water pipeline a is connected to the first water reservoir 13, and the output end of the first water pipeline a is connected to the second water reservoir 10. The water level of the first water reservoir 13 is lower than the water level of the second water reservoir 10. The first water pipeline a is provided with a pump 12 for conveying water in the first water reservoir 13 to the second water reservoir 10. The nuclear power generating equipment is connected to the power grid 2 via a first transmission line. 0 is electrically connected, the nuclear power generating equipment is electrically connected to the water pump 12 through the second power transmission line b, the second power transmission line b includes a first control switch 16 for controlling the second power transmission line b to be turned on or off; the input end of the second water pipeline c is connected to the second water reservoir 10, and the output end of the second water pipeline c is connected to the input end of the turbine 11, wherein a valve 26 is provided on the second water pipeline c, the valve 26 is electrically connected to the controller, the output end of the turbine 11 is connected to the input end of the third water pipeline d, and the output end of the third water pipeline d is connected to the first water reservoir 13.

[0021] In addition, the first water reservoir 13 and the second water reservoir 10 may also be two different water tanks.

[0022] In this embodiment, the input end of the first water pipeline a is connected to the first water reservoir 13, and the output end of the first water pipeline a is connected to the second water reservoir 10. The water level of the first water reservoir 13 is lower than the water level of the second water reservoir 10. The water level of the second water reservoir can be injected into the containment vessel 14 in the nuclear power generation equipment through gravity, thereby achieving the purpose of discharging heat in the containment vessel 14 in the nuclear power generation equipment in an emergency situation and ensuring the integrity of the containment vessel 14. A water pump 12 is provided in the first water pipeline a for conveying water in the first water reservoir 13 to the second water reservoir 10; the nuclear power generating equipment is electrically connected to the power grid 20 through the first transmission line, and the nuclear power generating equipment is electrically connected to the water pump 12 through the second transmission line b, and the second transmission line b includes a first control switch 16 for controlling the conduction or disconnection of the second transmission line b; the input end of the second water pipeline c is connected to the second water reservoir 10, the output end of the second water pipeline c is connected to the input end of the turbine 11, the output end of the turbine 11 is connected to the input end of the third water pipeline d, and the output end of the third water pipeline d is connected to the first water reservoir 13. This arrangement improves the energy utilization rate of the nuclear power plant 24, thereby increasing the economy of the power plant 24; and improves the mobility and transient response capability of the power plant 24.

[0023] Optionally, the power supply system further includes a controller, wherein the controller is electrically connected to the first control switch;

[0024] Wherein, when the power grid is in the first working period, the controller controls the first control switch to be disconnected, and the water pump is in a non-working state;

[0025] When the power grid is in the second working period, the controller controls the first control switch to be turned on, and the water pump is in a working state. The first working period and the second working period are different working periods.

[0026] Please refer to Figure 1 The controller is electrically connected to the first control switch 16. The first working period refers to when the power grid 20 system is in a high load period, and the second working period refers to when the power grid 20 system is in a low load period. When the power grid 20 is in the first working period, the controller controls the first control switch 16 to be disconnected, and the water pump 12 does not work; when the power grid 20 is in the second working period, the controller controls the first control switch 16 to be turned on, and the water pump 12 is in working state.

[0027] In this embodiment, when the power grid 20 system is under high load, where the high load of the power grid 20 system can be understood as the period during the day when the power consumption of major factories and the like is large, the controller controls the first control switch 16 to disconnect, and the water pump 12 does not work. The electricity generated at full power by the nuclear power plant is supplied to the power grid 20 and the power plant 24 for power consumption. When the power grid 20 system is under low load, where the low load of the power grid 20 system can be understood as the period at night when the power consumption of major factories and the like is small, the controller controls the first control switch 16 to conduct, and the water pump 12 works. The nuclear power plant can still operate at full power, and the excess load will be stored in the upstream reservoir through the water pump 12. The upstream reservoir can be used as a backup cooling water source and injected into the containment 14 in a passive manner, making full use of water resources and improving safety.

[0028] Optionally, the nuclear power generation equipment includes a containment, and the containment includes a heat dissipation pipeline.

[0029] The power supply system further includes a fourth water pipeline. The input end of the fourth water pipeline is connected to the second reservoir, the output end of the fourth water pipeline is connected to the input end of the heat dissipation pipeline, and the output end of the heat dissipation pipeline is connected to the first reservoir.

[0030] A first switch valve for controlling the conduction or disconnection of the fourth water pipeline is provided in the fourth water pipeline, and the controller is electrically connected to the first switch valve.

[0031] Please refer to Figure 1 , the nuclear power generation equipment includes a containment 14, and the containment 14 includes a heat dissipation pipeline.

[0032] The power supply system further includes a fourth water pipeline e. The input end of the fourth water pipeline e is connected to the second reservoir 10, the output end of the fourth water pipeline e is connected to the input end of the heat dissipation pipeline, and the output end of the heat dissipation pipeline is connected to the first reservoir 13.

[0033] A first switch valve for controlling the conduction or disconnection of the fourth water pipeline e is provided in the fourth water pipeline e, and the controller is electrically connected to the first switch valve.

[0034] In this embodiment, by connecting the input end of the fourth water pipeline e to the second reservoir 10, the output end of the fourth water pipeline e to the input end of the heat dissipation pipeline, and the output end of the heat dissipation pipeline to the first reservoir 13.

[0035] A first switch valve for controlling the conduction or disconnection of the fourth water pipeline e is provided in the fourth water pipeline e, and the controller is electrically connected to the first switch valve. With such a setting, when an emergency occurs in the nuclear power plant and the inside of the containment 14 (the reactor core and the spent fuel pool) needs to be cooled down, the water in the upstream reservoir can be injected into the containment 14 under the drive of gravity to achieve cooling and pressure reduction inside the containment 14.

[0036] Optionally, the power output end of the turbine is electrically connected to the plant power equipment through a third power transmission line, and the plant power equipment is the power equipment in the power plant to which the nuclear power generating equipment belongs.

[0037] Please refer to Figure 1 The power output end of the turbine 11 is electrically connected to the power plant 24 through the third transmission line f. The power plant 24 is an electrical equipment in the power plant 24 to which the nuclear power generating equipment belongs.

[0038] In this embodiment, the power output end of the turbine 11 is electrically connected to the power plant 24 through the third transmission line f. The power plant 24 is configured in this way for the power equipment in the power plant 24 to which the nuclear power generating equipment belongs. The plant power equipment refers to the power used by the power plant 24. When the nuclear power plant loses its external power supply, the upstream water can be released to drive the turbine 11 to generate electricity, and the power plant 24 is supplied with power through the plant power line.

[0039] Optionally, the auxiliary power equipment includes a first power interface and a second power interface, the third power transmission line includes a first trunk, a first branch, and a second branch, the input end of the first trunk is electrically connected to the power output end of the turbine, the output end of the first trunk is electrically connected to the first power interface through the first branch, and the output end of the first trunk is electrically connected to the second power interface through the second branch;

[0040] The first trunk line is provided with a first step-down transformer and a second control switch.

[0041] Please refer to Figure 1 , the two branches of the first trunk are the first branch and the second branch, the first power interface and the second power interface refer to the connection between the first branch and the second branch, the power plant 24 includes the first power interface and the second power interface, the third transmission line f includes the first trunk, the first branch and the second branch, the input end of the first trunk is electrically connected to the power output end of the turbine 11, the output end of the first trunk is electrically connected to the first power interface through the first branch, and the output end of the first trunk is electrically connected to the second power interface through the second branch;

[0042] The first trunk line is provided with a first step-down transformer 25 and a second control switch 27 .

[0043] In this embodiment, the input end of the first trunk is electrically connected to the power output end of the turbine 11, the output end of the first trunk is electrically connected to the first power interface through the first branch, and the output end of the first trunk is electrically connected to the second power interface through the second branch;

[0044] The first trunk line is provided with a first step-down transformer 25 and a second control switch 27. In this way, the electricity generated by the turbine 11 is connected to two safety sequences of the factory power supply, which can better ensure the power supply.

[0045] Optionally, the nuclear power generating equipment is electrically connected to the plant power equipment via a fourth transmission line.

[0046] Please refer to Figure 1 , the nuclear power generating equipment is electrically connected to the power plant 24 via a fourth transmission line.

[0047] In this implementation, the nuclear power generating equipment is electrically connected to the power plant 24 via the fourth transmission line, which can improve the energy utilization rate of the nuclear power plant.

[0048] Optionally, the power supply system also includes a fifth transmission line, and the nuclear power generation equipment is electrically connected to the input end of the first transmission line, the input end of the second transmission line and the input end of the fourth transmission line respectively through the fifth transmission line. A load switch is provided on the fifth transmission line, and the controller is electrically connected to the load switch.

[0049] Please refer to Figure 1 The power supply system also includes a fifth transmission line, through which the nuclear power generating equipment is electrically connected to the input end of the first transmission line, the input end of the second transmission line b and the input end of the fourth transmission line respectively. A load switch 21 is provided on the fifth transmission line, and the controller is electrically connected to the load switch 21.

[0050] In this embodiment, the fifth transmission line is electrically connected to the input end of the first transmission line, the input end of the second transmission line b and the input end of the fourth transmission line respectively, and a load switch 21 is provided on the fifth transmission line. The controller is electrically connected to the load switch 21. This arrangement can better participate in the peak regulation of the power grid 20, enhance the stability of the reactor operation, and improve the energy utilization rate of the nuclear power plant, thereby increasing the economy of the power plant 24.

[0051] Optionally, the fourth transmission line comprises a first step-down transformer.

[0052] Please refer to Figure 1 , the fourth transmission line includes a first step-down transformer 22.

[0053] In this embodiment, a first step-down transformer 22 is provided on the fourth power transmission line, and the transformer has the function of converting a relatively high voltage at the input end into a relatively low ideal output voltage, such as Figure 1 The middle transformer 23 can enhance the safety of the power plant 24.

[0054] Optionally, the first transmission line comprises a transformer.

[0055] Please refer to Figure 1 The first transmission line includes a transformer 19, and is the line through which the nuclear power generating equipment is electrically connected to the power grid 20.

[0056] In this implementation, by providing a transformer 19 on the first transmission line, a key device for ensuring safe and stable operation of the traction power supply system can be ensured.

[0057] Optionally, the second transmission line comprises a second step-down transformer.

[0058] Please refer to Figure 1 The second transmission line b includes a second step-down transformer 18, and is the line through which the nuclear power generating equipment is electrically connected to the water pump 12 via the second transmission line b.

[0059] In this embodiment, by setting a second step-down transformer 18 on the second transmission line, and the transformer has the function of converting the higher voltage at the input end into a relatively low ideal output voltage, the safety of the power plant 24 can be enhanced.

[0060] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A power supply system, It is characterized in that include: Nuclear power generating equipment, a first water pipeline, a second water pipeline, a third water pipeline and a water turbine; The input end of the first water delivery pipeline is in communication with the first water reservoir, the output end of the first water delivery pipeline is in communication with the second water reservoir, the water level of the first water reservoir is lower than the water level of the second water reservoir, and the first water delivery pipeline is provided with a water pump for delivering water in the first water reservoir to the second water reservoir; The nuclear power generating equipment is electrically connected to the power grid via a first power transmission line, and the nuclear power generating equipment is electrically connected to the water pump via a second power transmission line, wherein the second power transmission line includes a first control switch for controlling the conduction or disconnection of the second power transmission line; The input end of the second water pipeline is connected to the second water reservoir, the output end of the second water pipeline is connected to the input end of the turbine, the output end of the turbine is connected to the input end of the third water pipeline, and the output end of the third water pipeline is connected to the first water reservoir.

2. The power supply system according to claim 1, It is characterized in that The power supply system further includes a controller, wherein the controller is electrically connected to the first control switch; Wherein, when the power grid is in the first working period, the controller controls the first control switch to be disconnected, and the water pump is in a non-working state; When the power grid is in the second working period, the controller controls the first control switch to be turned on, and the water pump is in a working state. The first working period and the second working period are different working periods.

3. The power supply system according to claim 2, It is characterized in that The nuclear power generating equipment comprises a containment shell, and the containment shell comprises a heat dissipation pipeline; The power supply system further includes a fourth water pipeline, the input end of the fourth water pipeline is connected to the second water reservoir, the output end of the fourth water pipeline is connected to the input end of the heat dissipation pipeline, and the output end of the heat dissipation pipeline is connected to the first water reservoir; The fourth water delivery pipeline is provided with a first switch valve for controlling the connection or disconnection of the fourth water delivery pipeline, and the controller is electrically connected to the first switch valve.

4. The power supply system according to claim 2, It is characterized in that The power output end of the water turbine is electrically connected to the plant power equipment through the third power transmission line, and the plant power equipment is the power equipment in the power plant to which the nuclear power generation equipment belongs.

5. The power supply system according to claim 4, It is characterized in that The auxiliary power equipment includes a first power interface and a second power interface, the third power transmission line includes a first trunk, a first branch and a second branch, the input end of the first trunk is electrically connected to the power output end of the turbine, the output end of the first trunk is electrically connected to the first power interface through the first branch, and the output end of the first trunk is electrically connected to the second power interface through the second branch; The first trunk line is provided with a first step-down transformer and a second control switch.

6. The power supply system according to claim 4, It is characterized in that The nuclear power generating equipment is electrically connected to the plant power equipment via a fourth power transmission line.

7. The power supply system according to claim 6, It is characterized in that The power supply system also includes a fifth transmission line, and the nuclear power generation equipment is electrically connected to the input end of the first transmission line, the input end of the second transmission line and the input end of the fourth transmission line through the fifth transmission line. A load switch is provided on the fifth transmission line, and the controller is electrically connected to the load switch.

8. The power supply system according to claim 7, It is characterized in that The fourth power transmission line includes a first step-down transformer.

9. The power supply system according to claim 1, It is characterized in that The first transmission line includes a transformer.

10. The power supply system according to claim 1, It is characterized in that The second power transmission line includes a second step-down transformer.

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