Independent power grid system of nuclear power plant and method for supplying independent power to nuclear power plant using same

Abstract

The present invention relates to an independent power grid system of a nuclear power plant including a small modular reactor (SMR), the independent power grid system comprising: a power generation module including the SMR; an integrated power facility that supplies power required for starting and operating the power generation module; a self-powered generator capable of generating power by itself; a switch yard that receives the power generated from the self-powered generator and the power generation module and supplies power to a consumer and the integrated power facility; and a control unit that controls the switch yard and the self-powered generator so that power is selectively supplied to the consumer and the integrated power facility.

Description

Independent power grid system for nuclear power plants and method for supplying independent power to nuclear power plants using the system

[0001] The present invention relates to an independent power grid system for a nuclear power plant and a method for supplying independent power to a nuclear power plant using the same.

[0002] Traditional active nuclear power plants have relied on external power grids to receive power and operate the plant, making it impossible to construct an independent power grid isolated from the external grid. Furthermore, active nuclear power plants rely on electricity as a driving force to operate safety functions in emergencies. However, small modular reactors (SMRs), which rely on natural forces like gravity to operate safety functions in emergencies, can be configured with non-safe power systems, enabling the construction of an independent power grid isolated from the external grid.

[0003] The purpose of the present invention is to provide an independent power grid system for a nuclear power plant and a method for supplying independent power to a nuclear power plant using the same.

[0004] The present invention relates to an independent power grid system for a nuclear power plant including a small modular reactor (SMR), and comprises: a power generation module including the SMR; an integrated power facility supplying power required for starting and operating the power generation module; a self-starting generator capable of independently producing power; a switch yard receiving power produced by the self-starting generator and the power generation module and supplying power to a customer and the integrated power facility; and a control unit controlling the switch yard and the self-starting generator so that power is selectively supplied to the customer and the integrated power facility.

[0005] The power conversion unit may further include a power conversion unit located between the switch yard and the integrated power facility, and the power conversion unit may include an auxiliary transformer that converts high-voltage power generated from the power generation module into low-voltage power; and a high-voltage circuit breaker base that can distribute power received from the auxiliary transformer into power for various loads.

[0006] The power converter further includes a main transformer located between the power generation module and the switch yard, converting the power generated from the power generation module into high voltage power and transmitting it to the auxiliary transformer and the switch yard, and the power of the switch yard can be supplied to the power conversion unit without passing through the main transformer.

[0007] The above power generation module includes a first power generation module and a second power generation module, and the integrated power facility may include a first integrated power facility corresponding to the first power generation module; and a second integrated power facility corresponding to the second power generation module.

[0008] The control unit can control the self-driven generator and the switch yard to supply power to the switch yard by starting the self-driven generator and to supply power from the switch yard to the first integrated power facility.

[0009] The above control unit can control the switch yard so that when the first power generation module is started, the self-starting generator is stopped and the power produced by the first power generation module is supplied to the second integrated power facility through the switch yard.

[0010] The present invention relates to a method for supplying independent power to a nuclear power plant including a small modular reactor (SMR), comprising the steps of: operating a self-starting generator to supply power to a switchyard (S10); and supplying the power supplied to the switchyard to a power generation module including the SMR through an integrated power facility to start the power generation module (S20), wherein the integrated power facility supplies power required for starting and operating the power generation module.

[0011] Before the above step S10, a step of opening all circuit breakers in the switch yard for discharge of residual charge and blocking of abnormal current may be further included.

[0012] The above power generation module includes a first power generation module and a second power generation module, and the integrated power facility includes a first integrated power facility corresponding to the first power generation module and a second integrated power facility corresponding to the second power generation module, and the power generation module that is started in step S20 is the first power generation module, and after step S20, the method may further include a step of stopping the self-starting generator (S30); and a step of supplying power generated by the start of the first power generation module to the second integrated power facility through the switch yard (S40).

[0013] Between the second power generation module and the switch yard, a main transformer is positioned to convert the power generated from the power generation module into the high voltage power, and between the switch yard and the second integrated power facility, an auxiliary transformer is positioned to convert the high voltage power generated from the power generation module into low voltage power; and a power conversion unit including a high voltage circuit breaker base capable of distributing the power received from the auxiliary transformer into power for various loads is positioned, and in the step S40, the power of the switch yard can be supplied to the power conversion unit without passing through the main transformer.

[0014] According to the present invention, an independent power grid system for a nuclear power plant and a method for supplying independent power to a nuclear power plant using the same are provided.

[0015] Figure 1 illustrates an independent power grid system of a nuclear power plant according to one embodiment of the present invention.

[0016] Figure 2 is a configuration diagram showing the control of an independent power grid system of a nuclear power plant according to one embodiment of the present invention.

[0017] Figure 3 is a flowchart showing a method for supplying independent power to a nuclear power plant according to one embodiment of the present invention.

[0018] The present invention will be described in more detail with reference to the drawings below.

[0019] The attached drawings are merely examples intended to more specifically illustrate the technical concepts of the present invention, and therefore, the scope of the present invention is not limited to the attached drawings. Furthermore, the attached drawings may exaggerate the size and spacing of components to illustrate the relationships between components.

[0020] In the present invention, a nuclear power plant includes a small modular reactor (hereinafter referred to as “SMR”), and a plurality of reactors may be arranged within the power plant.

[0021] An independent power grid system of a nuclear power plant according to one embodiment of the present invention will be described with reference to FIGS. 1 and 2.

[0022] FIG. 1 illustrates an independent power grid system of a nuclear power plant according to an embodiment of the present invention, and FIG. 2 is a configuration diagram illustrating control of an independent power grid system of a nuclear power plant according to an embodiment of the present invention.

[0023] Referring to FIG. 1, the independent power grid system (10) includes a power generation module (100), an integrated power facility (200), a self-powered generator (300), a switch yard (400), a power conversion unit (500), a main transformer (600), a customer (700), and a control unit (800).

[0024] The power generation module (100) includes an SMR and is provided in multiple units.

[0025] The power generation module (100) includes a first power generation module (110) and a second power generation module (120).

[0026] The individual power generation modules (110, 120) are not individually illustrated but are comprised of a reactor (SMR), turbine, generator and auxiliary equipment for power generation and operation of the power plant.

[0027] The integrated power facility (200) supplies the power required for starting and operating the power generation module (100).

[0028] The integrated power facility (200) includes a first integrated power facility (210) and a second integrated power facility (220).

[0029] The first integrated power facility (210) corresponds to the first power generation module (110) and supplies the power required for starting and operating the first power generation module (110).

[0030] The second integrated power facility (220) corresponds to the second power generation module (120) and supplies the power required for starting and operating the second power generation module (120).

[0031] Although Figure 1 depicts four individual power generation modules, it is not limited thereto.

[0032] The self-powered generator (300) can produce electricity on its own and is connected to a switch yard (400).

[0033] The self-powered generator (300) can be selected from among a diesel generator, a gas turbine generator, a steam turbine generator, and a hydrogen generator.

[0034] The switch yard (400) receives power generated from a self-powered generator (300) and a power generation module (100), and supplies power to a user (600) and an integrated power facility (200).

[0035] The switch yard (400) supplies the supplied power to the power conversion unit (500) without passing through the peripheral voltage transformer (600) described later.

[0036] The power conversion unit (500) is located between the switch yard (400) and the integrated power facility (200), and includes an auxiliary transformer (510) and a high-voltage circuit breaker base (520).

[0037] The auxiliary transformer (510) converts high-voltage power generated from the power generation module (100) into low-voltage power.

[0038] The high voltage circuit breaker (520) distributes the power received from the auxiliary transformer (510) to power of various loads.

[0039] The main transformer (600) is located between the power generation module (100) and the switch yard (400), and converts the power generated from the power generation module (100) into high voltage power and transmits it to the auxiliary transformer (510) and the switch yard (400).

[0040] The receiver (700) receives power through the switch yard (400).

[0041] Referring to FIG. 2, the control unit (800) controls the switch yard (400) and the self-powered generator (300) so that power is selectively supplied to the receiver (700) and the integrated power facility (200).

[0042] The control unit (800) operates the self-driven generator (300) to supply power to the switch yard (400), and controls the self-driven generator (300) and the switch yard (400) so that power from the switch yard (400) is supplied to the first integrated power facility (210).

[0043] When the first power generation module (110) is started, the control unit (800) stops the self-powered generator (300) and supplies the power generated in the first power generation module (210) to the second integrated power facility (220) through the switch yard (400).

[0044] Referring to FIG. 3, a method for supplying independent power to a nuclear power plant according to an embodiment of the present invention will be described in detail.

[0045] Figure 3 is a flowchart showing a method for supplying independent power to a nuclear power plant according to one embodiment of the present invention.

[0046] When a nuclear power plant needs to be started, all circuit breakers in the switchyard (400) are first opened to discharge residual charge and block abnormal currents to supply independent power to the nuclear power plant. (S100)

[0047] Afterwards, the self-powered generator (300) is operated to supply power to the switch yard (400). (S200)

[0048] Next, the power supplied to the switch yard (400) is supplied to the first power generation module (110) including the SMR through the first integrated power facility (210) to start the first power generation module (110). Here, the first integrated power facility (210) supplies the power required for starting and operating the first power generation module (110). (S300)

[0049] After the first power generation module (110) is started, the self-starting generator (300) is stopped. (S400)

[0050] After step S400, the power generated by the operation of the first power generation module (110) is supplied to the second integrated power facility (220) through the switch yard (400). (S500) At this time, the power of the switch yard (400) is supplied to the power conversion unit (500) without passing through the main transformer (600).

[0051] Thereafter, the power generated from each power generation module (100) is transmitted to the switch yard (400), and the transmitted power is supplied to the user (700). (S600)

[0052] The embodiments of the present invention described above and illustrated in the drawings should not be construed as limiting the technical concept of the present invention. The scope of protection of the present invention is limited only by the matters set forth in the claims, and those skilled in the art will be able to make various improvements and modifications to the technical concept of the present invention. Accordingly, such improvements and modifications, as long as they are obvious to those skilled in the art, will fall within the scope of protection of the present invention.

Claims

1. Regarding the independent power grid system of a nuclear power plant including a small modular reactor (SMR), A power generation module including the above SMR; Integrated power facility that supplies the power required for starting and operating the above power generation module; A self-powered generator capable of generating its own electricity; A switch yard that receives power generated from the above-mentioned self-powered generator and the above-mentioned power generation module and supplies power to the user and the above-mentioned integrated power facility; and An independent power grid system of a nuclear power plant, comprising a control unit that controls the switch yard and the self-starting generator so that power is selectively supplied to the above-mentioned users and the above-mentioned integrated power facility.

2. In paragraph 1, Further comprising a power conversion unit located between the above switch yard and the above integrated power facility, The above power conversion unit, An auxiliary transformer that converts high-voltage power generated from the above-mentioned power generation module into low-voltage power; and An independent power grid system of a nuclear power plant including a high-voltage circuit breaker base capable of distributing power received from the auxiliary transformer to power of various loads.

3. In paragraph 2, It further includes a main transformer located between the power generation module and the switch yard, converting the power generated from the power generation module into the high voltage power and transmitting it to the auxiliary transformer and the switch yard. An independent power grid system of a nuclear power plant in which the power of the above switch yard is supplied to the above power conversion unit without passing through the above main transformer.

4. In paragraph 1, The above power generation module includes a first power generation module and a second power generation module, The above integrated power facility is, A first integrated power facility corresponding to the first power generation module; and An independent power grid system of a nuclear power plant including a second integrated power facility corresponding to the above second power generation module.

5. In paragraph 4, The above control unit, By starting the above self-starting generator, power is supplied to the above switch yard, An independent power grid system of a nuclear power plant that controls the self-starting generator and the switch yard so that power from the switch yard is supplied to the first integrated power facility.

6. In paragraph 5, The above control unit, When the above first power generation module is started, the self-starting generator is stopped, An independent power grid system of a nuclear power plant that controls the switch yard so that the power produced in the first power generation module is supplied to the second integrated power facility through the switch yard.

7. A method for supplying independent power to a nuclear power plant including a small modular reactor (SMR). Step (S10) of supplying power to the switch yard by operating a self-powered generator; and A method for supplying independent power to a nuclear power plant, comprising: a step (S20) of supplying power supplied to the switchyard to a power generation module including the SMR through an integrated power facility to start the power generation module, wherein the integrated power facility supplies power required for starting and operating the power generation module; 8. In paragraph 7, A method for supplying independent power to a nuclear power plant, further comprising, prior to the above step S10, a step of opening all circuit breakers within the switch yard for discharge of residual charge and blocking of abnormal current.

9. In paragraph 7, The above power generation module includes a first power generation module and a second power generation module, and the integrated power facility includes a first integrated power facility corresponding to the first power generation module and a second integrated power facility corresponding to the second power generation module. The power generation module that operates in the above S20 step is the first power generation module. After the above S20 step, Step (S30) of stopping the self-powered generator; and A method for supplying independent power to a nuclear power plant, further comprising a step (S40) of supplying power generated by the operation of the first power generation module to the second integrated power facility through the switch yard.

10. In paragraph 9, Between the second power generation module and the switch yard, a main transformer is located to convert the power generated from the power generation module into the high voltage power. Between the switch yard and the second integrated power facility, a power conversion unit is located, including an auxiliary transformer that converts high-voltage power generated from the power generation module into low-voltage power; and a high-voltage circuit breaker that can distribute power received from the auxiliary transformer into power for various loads. In the above step S40, a method for supplying independent power to a nuclear power plant by supplying power from the switch yard to the power conversion unit without passing through the main transformer.

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