Redundant power supply device for nuclear power station and UPS (uninterrupted power supply)

Abstract

The utility model provides a redundant power supply device for a nuclear power station and a UPS (Uninterrupted Power Supply). At least two power supply modules; for any power supply module, the alternating current input end of the power supply module is used for being connected with a corresponding alternating current power supply, the direct current input end of the power supply module is used for being connected with a corresponding direct current power supply, and the output end of the power supply module is connected with the power supply end of the control module; the power supply module comprises an AC power supply unit and a DC power supply unit. The input end of the alternating-current power supply unit forms the alternating-current input end of the power module, the input end of the direct-current power supply unit forms the direct-current input end of the power module, and the output end of the alternating-current power supply unit is connected with the output end of the direct-current power supply unit to form the output end of the power module. The plurality of power supply modules are redundant, and each power supply module is in alternating current and direct current redundancy, so that the power supply of the control module can be effectively ensured, and the power supply stability and reliability of the control module are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power supply, in particular to a redundant power supply device and a UPS power supply for a nuclear power station. Background Art

[0002] Nuclear power plants are often equipped with UPS (Uninterrupted Power Supply) for emergency power supply. Within a UPS, the control module is responsible for controlling the operating status of the entire power supply equipment, acting as the brain of the system and playing a crucial role.

[0003] In the prior art, the control module is usually powered by a single power supply, for example, a DC or AC power supply. When the DC power supply or the AC power supply is abnormal, the power supply abnormality will affect the operation of the entire power supply device. Utility Model Content

[0004] The embodiments of the present invention provide a redundant power supply device and a UPS power supply for a nuclear power plant, so as to solve the problem in the prior art that a control module is powered by a single power supply and the power supply is unstable.

[0005] In a first aspect, an embodiment of the present invention provides a redundant power supply device for a nuclear power plant, comprising: at least two power modules;

[0006] For any power module, the AC input terminal of the power module is used to connect to the corresponding AC power supply, the DC input terminal of the power module is used to connect to the corresponding DC power supply, and the output terminal of the power module is connected to the power supply terminal of the control module;

[0007] The power supply module includes: an AC power supply unit and a DC power supply unit;

[0008] The input end of the AC power supply unit forms the AC input end of the power module, the input end of the DC power supply unit forms the DC input end of the power module, and the output end of the AC power supply unit is connected to the output end of the DC power supply unit to form the output end of the power module.

[0009] Optionally, the power supply module further includes: a DC conversion unit;

[0010] The output end of the AC power supply unit and the output end of the DC power supply unit are both connected to the input end of the DC conversion unit, and the output end of the DC conversion unit forms the output end of the power module.

[0011] Optionally, the output end of the AC power supply unit includes: a first positive DC output end and a first negative DC output end; the output end of the DC power supply unit includes: a second positive DC output end and a second negative DC output end; the input end of the DC conversion unit includes: a positive DC input end and a negative DC input end; the first positive DC output end is connected to the second positive DC output end and the positive DC input end, respectively, and the first negative DC output end is connected to the second negative DC output end and the negative DC input end, respectively;

[0012] The DC conversion unit includes: a voltage stabilizing subunit and a DCDC conversion subunit;

[0013] The positive input terminal of the voltage stabilizing subunit forms a positive DC input terminal, the negative input terminal of the voltage stabilizing subunit forms a negative DC input terminal, the positive output terminal of the voltage stabilizing subunit is connected to the positive input terminal of the DCDC conversion subunit, and the negative output terminal of the voltage stabilizing subunit is connected to the negative input terminal of the DCDC conversion subunit;

[0014] The output end of the DCDC conversion subunit forms the output end of the DC conversion unit.

[0015] Optionally, the voltage stabilizing subunit includes: a first capacitor;

[0016] The first end of the first capacitor forms the positive input terminal and the positive output terminal of the voltage stabilizing subunit, and the second end of the first capacitor forms the negative input terminal and the negative output terminal of the voltage stabilizing subunit.

[0017] Optionally, the AC power supply unit includes: a rectifier bridge;

[0018] The first AC input terminal and the second AC input terminal of the rectifier bridge are used to input corresponding AC power supplies. The positive output terminal of the rectifier bridge forms a first positive DC output terminal, and the negative output terminal of the rectifier bridge forms a second positive DC output terminal.

[0019] Optionally, the AC power supply unit further includes: a first resistor and a second resistor;

[0020] The first AC input terminal of the rectifier bridge is connected to the first end of the first resistor, the second AC input terminal of the rectifier bridge is connected to the first end of the second resistor, the positive output terminal of the rectifier bridge forms a first positive DC output terminal, and the negative output terminal of the rectifier bridge forms a second positive DC output terminal;

[0021] The second end of the first resistor and the second end of the second resistor are used to input corresponding AC power.

[0022] Optionally, the DC power supply unit includes: a first diode and a second diode;

[0023] The anode of the first diode is connected to the positive electrode of the corresponding DC power supply, and the cathode of the first diode forms a second positive DC output terminal;

[0024] The cathode of the second diode is connected to the negative electrode of the corresponding DC power supply, and the anode of the second diode forms a second negative DC output terminal.

[0025] Optionally, the DC power supply unit further includes: a third resistor;

[0026] The anode of the first diode is connected to the positive electrode of the corresponding DC power supply through the third resistor.

[0027] Optionally, there are two power modules.

[0028] In a second aspect, an embodiment of the present invention provides a UPS power supply, comprising the redundant power supply device and control module for a nuclear power plant provided by any one embodiment of the first aspect above;

[0029] The redundant power supply device used in nuclear power plants is used to supply power to the control module.

[0030] The embodiment of the present invention provides a redundant power supply device and UPS power supply for a nuclear power plant. The redundant power supply device for a nuclear power plant includes: at least two power supply modules; for any one power supply module, the AC input end of the power supply module is used to connect to the corresponding AC power supply, the DC input end of the power supply module is used to connect to the corresponding DC power supply, and the output end of the power supply module is connected to the power supply end of the control module; the power supply module includes: an AC power supply unit and a DC power supply unit; the input end of the AC power supply unit forms the AC input end of the power supply module, the input end of the DC power supply unit forms the DC input end of the power supply module, and the output end of the AC power supply unit is connected to the output end of the DC power supply unit to form the output end of the power supply module. In the embodiment of the present invention, multiple power supply modules are redundant to improve power supply reliability; at the same time, the AC and DC redundancy of each power supply module further improves the reliability of power supply, can effectively ensure the power supply of the control module, improve the stability and reliability of the power supply of the control module, and thus ensure the reliability and stability of the operation of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0032] Figure 1 This is a schematic diagram of the circuit structure of a redundant power supply device for a nuclear power plant provided by an embodiment of the utility model;

[0033] Figure 2 This is a schematic diagram of the circuit structure of a power supply module provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0034] To help those skilled in the art better understand this solution, the following will clearly describe the technical solutions in the embodiments of this solution in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of this solution, not all of it. Based on the embodiments of this solution, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of this solution.

[0035] Throughout the specification, claims, and accompanying figures of this solution, the term "including" and any variations thereof mean "including but not limited to," and are intended to cover non-exclusive inclusions and are not limited to the examples listed herein. Furthermore, the terms "first" and "second," etc., are used to distinguish between different objects, not to describe a specific order.

[0036] The following is a detailed description of the implementation of the present invention with reference to the accompanying drawings:

[0037] Figure 1 This is a schematic diagram of the structure of a redundant power supply device for a nuclear power plant provided by an embodiment of the present invention. The redundant power supply device is used in a nuclear power plant. Figure 1 , the redundant power supply device for the nuclear power plant comprises: at least two power modules 1;

[0038] For any power module 1, the AC input terminal of the power module 1 is used to connect to the corresponding AC power supply, the DC input terminal of the power module 1 is used to connect to the corresponding DC power supply, and the output terminal of the power module 1 is connected to the power supply terminal of the control module;

[0039] The power supply module 1 includes: an AC power supply unit 11 and a DC power supply unit 12;

[0040] The input end of the AC power supply unit 11 forms the AC input end of the power module 1, the input end of the DC power supply unit 12 forms the DC input end of the power module 1, and the output end of the AC power supply unit 11 is connected to the output end of the DC power supply unit 12 to form the output end of the power module 1.

[0041] In the embodiment of the present invention, multiple power supply modules 1 are redundantly configured to jointly power the control module. When a power supply module 1 is abnormal or the power supply of a power supply module 1 is abnormal, the other power supply modules 1 are normal, and the normal power supply of the control module can still be guaranteed. At the same time, for any power supply module 1, AC and DC redundant power supplies are configured, and the AC power supply unit 11 and the DC power supply unit 12 can both independently supply power to achieve redundancy. For example, when the AC power supply is abnormal, the DC power supply unit 12 can operate normally to ensure power supply; when the DC power supply is abnormal, the AC power supply unit 11 can operate normally to ensure power supply.

[0042] Based on the above, in the embodiment of the utility model, multiple power modules 1 are redundant, and each power module 1 is also provided with AC / DC redundancy, which improves the reliability and stability of the power supply of the control module from two aspects, thereby improving the reliability and stability of the operation of the entire system and ensuring the stability of the power supply of the nuclear power plant.

[0043] It should be noted that the AC power supplies (AC1, ..., ACn) corresponding to the power modules 1 may be the same or different. Similarly, the DC power supplies (DC1, ..., DCn) corresponding to the power modules 1 may be the same or different.

[0044] Based on the above, the AC power supply unit 11 and the DC power supply unit 12 in the power module 1 can provide power independently.

[0045] Specifically, the AC power supply unit 11 is used to rectify and convert AC power into DC power, and the DC power supply unit 12 is only used for DC conversion. The AC power supply unit 11 and the DC power supply unit 12 can each be provided with a DC conversion unit for voltage conversion.

[0046] In one possible implementation, reference Figure 2 , the power module 1 may further include: a DC conversion unit 13;

[0047] The output end of the AC power supply unit 11 and the output end of the DC power supply unit 12 are both connected to the input end of the DC conversion unit 13 , and the output end of the DC conversion unit 13 forms the output end of the power module 1 .

[0048] If the output voltage of the AC power supply unit 11 and the DC power supply unit 12 does not match the supply voltage of the control module, a DC conversion unit 13 can be set after the AC power supply unit 11 and the DC power supply unit 12 to make the output voltage match the supply voltage of the control module.

[0049] Based on the above, the DC conversion unit 13 is used to adjust the voltage to achieve voltage conversion.

[0050] In one possible implementation, reference Figure 2 The output end of the AC power supply unit 11 includes: a first positive DC output end and a first negative DC output end; the output end of the DC power supply unit 12 includes: a second positive DC output end and a second negative DC output end; the input end of the DC conversion unit 13 includes: a positive DC input end and a negative DC input end; the first positive DC output end is connected to the second positive DC output end and the positive DC input end respectively, and the first negative DC output end is connected to the second negative DC output end and the negative DC input end respectively;

[0051] The DC conversion unit 13 may include: a voltage stabilizing subunit 131 and a DCDC conversion subunit 132;

[0052] The positive input terminal of the voltage stabilizing subunit 131 forms a positive DC input terminal, the negative input terminal of the voltage stabilizing subunit 131 forms a negative DC input terminal, the positive output terminal of the voltage stabilizing subunit 131 is connected to the positive input terminal of the DCDC conversion subunit 132, and the negative output terminal of the voltage stabilizing subunit 131 is connected to the negative input terminal of the DCDC conversion subunit 132;

[0053] The output end of the DCDC conversion sub-unit 132 forms the output end of the DC conversion unit 13 .

[0054] In the embodiment of the present invention, since the voltage outputted from the output end of the AC power supply unit 11 may be a DC bun wave, the voltage stabilizing subunit 131 is used to adjust the voltage and stabilize the input voltage of the DCDC conversion subunit 132, so that the DCDC conversion subunit 132 can work normally and realize voltage conversion.

[0055] In one possible implementation, reference Figure 2 , the voltage stabilizing subunit 131 may include: a first capacitor C1;

[0056] The first end of the first capacitor C1 forms the positive input terminal and the positive output terminal of the voltage stabilizing subunit 131 , and the second end of the first capacitor C1 forms the negative input terminal and the negative output terminal of the voltage stabilizing subunit 131 .

[0057] The voltage stabilizing subunit 131 can be formed by a first capacitor C1 , and voltage stabilization is achieved by charging and discharging the capacitor, which requires fewer components, has low cost, a simple structure, and is easy to implement.

[0058] Since the DC conversion unit 13 is provided at the rear end of the AC power supply unit 11 , it is not necessary to further provide a DC conversion unit in the AC power supply unit 11 .

[0059] Based on this, in a possible implementation, refer to Figure 2 , the AC power supply unit 11 may include: a rectifier bridge BD1;

[0060] The first AC input terminal and the second AC input terminal of the rectifier bridge BD1 are used to input corresponding AC power supplies. The positive output terminal of the rectifier bridge BD1 forms a first positive DC output terminal, and the negative output terminal of the rectifier bridge BD1 forms a second positive DC output terminal.

[0061] In the embodiment of the present invention, since there is no need to set up DC conversion in the AC power supply unit 11, the AC power supply unit 11 can use the rectifier bridge BD1 to achieve rectification, output the rectified DC bun wave, and then the DC conversion unit 13 at the back end performs voltage conversion to achieve stable DC power output.

[0062] In one possible implementation, reference Figure 2 , the AC power supply unit 11 may further include: a first resistor R1 and a second resistor R2;

[0063] A first AC input terminal of the rectifier bridge BD1 is connected to a first terminal of the first resistor R1, a second AC input terminal of the rectifier bridge BD1 is connected to a first terminal of the second resistor R2, a positive output terminal of the rectifier bridge BD1 forms a first positive DC output terminal, and a negative output terminal of the rectifier bridge BD1 forms a second positive DC output terminal;

[0064] The second end of the first resistor R1 and the second end of the second resistor R2 are used to input corresponding AC power.

[0065] The first resistor R1 and the second resistor R2 are used to limit current to prevent high current from damaging the device.

[0066] In one possible implementation, reference Figure 2 , the DC power supply unit 12 may include: a first diode D1 and a second diode D2;

[0067] The anode of the first diode D1 is connected to the positive electrode of the corresponding DC power supply, and the cathode of the first diode D1 forms a second positive DC output terminal;

[0068] The cathode of the second diode D2 is connected to the negative electrode of the corresponding DC power supply, and the anode of the second diode D2 forms a second negative DC output terminal.

[0069] Since a DC conversion unit 13 is provided at the rear end of the DC power supply unit 12, the DC power supply unit 12 does not need to perform DC voltage conversion. The DC power supply unit 12 is only composed of a first diode D1 and a second diode D2. By utilizing the reverse cutoff characteristics of the diode, the DC power output from the AC power supply unit 11 can be prevented from being fed back. At the same time, since the AC power supply unit 11 is implemented by a rectifier bridge BD1, the DC power output from the DC power supply unit 12 can also be prevented from being fed back. Therefore, through the rectifier bridge BD1 and the first diode D1 and the second diode D2, the influence between the DC power supply unit 12 and the AC power supply unit 11 can be effectively avoided, so that the output of the DC power supply unit 12 and the output of the AC power supply unit 11 can be directly connected to jointly supply power to the back end.

[0070] In one possible implementation, reference Figure 2 , the DC power supply unit 12 may further include: a third resistor R3;

[0071] The anode of the first diode D1 is connected to the positive electrode of the corresponding DC power supply through the third resistor R3.

[0072] As above, the third resistor R3 is also used for current limiting to prevent device damage caused by high current.

[0073] In a possible implementation, there may be two power modules 1 .

[0074] In the embodiment of the present invention, two power supply modules 1 can be provided. The two power supply modules 1 are redundant, which not only ensures the stability of power supply but also reduces the number of components and cost.

[0075] Corresponding to the above embodiments, an embodiment of the present utility model further provides a UPS power supply, comprising the redundant power supply device and control module for a nuclear power plant provided by any one of the above embodiments;

[0076] The redundant power supply device used in nuclear power plants is used to supply power to the control module.

[0077] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A redundant power supply device for a nuclear power plant, characterized in that: include: At least two power modules; For any power module, the AC input terminal of the power module is used to connect to the corresponding AC power supply, the DC input terminal of the power module is used to connect to the corresponding DC power supply, and the output terminal of the power module is connected to the power supply terminal of the control module; The power supply module includes: an AC power supply unit and a DC power supply unit; The input end of the AC power supply unit forms the AC input end of the power module, the input end of the DC power supply unit forms the DC input end of the power module, and the output end of the AC power supply unit is connected to the output end of the DC power supply unit to form the output end of the power module.

2. The redundant power supply device for a nuclear power plant according to claim 1, wherein: The power supply module further includes: a DC conversion unit; The output end of the AC power supply unit and the output end of the DC power supply unit are both connected to the input end of the DC conversion unit, and the output end of the DC conversion unit forms the output end of the power module.

3. The redundant power supply device for a nuclear power plant according to claim 2, wherein: The output end of the AC power supply unit includes: a first positive DC output end and a first negative DC output end; the output end of the DC power supply unit includes: a second positive DC output end and a second negative DC output end; the input end of the DC conversion unit includes: a positive DC input end and a negative DC input end; the first positive DC output end is connected to the second positive DC output end and the positive DC input end respectively, and the first negative DC output end is connected to the second negative DC output end and the negative DC input end respectively; The DC conversion unit includes: a voltage stabilizing subunit and a DCDC conversion subunit; The positive input terminal of the voltage stabilizing subunit forms the positive DC input terminal, the negative input terminal of the voltage stabilizing subunit forms the negative DC input terminal, the positive output terminal of the voltage stabilizing subunit is connected to the positive input terminal of the DCDC conversion subunit, and the negative output terminal of the voltage stabilizing subunit is connected to the negative input terminal of the DCDC conversion subunit; The output end of the DCDC conversion subunit forms the output end of the DC conversion unit.

4. The redundant power supply device for a nuclear power plant according to claim 3, wherein: The voltage stabilizing subunit includes: a first capacitor; The first end of the first capacitor forms the positive input end and the positive output end of the voltage stabilizing subunit, and the second end of the first capacitor forms the negative input end and the negative output end of the voltage stabilizing subunit.

5. The redundant power supply device for a nuclear power plant according to claim 3, wherein: The AC power supply unit includes: a rectifier bridge; The first AC input end of the rectifier bridge and the second AC input end of the rectifier bridge are used to input corresponding AC power supplies, the positive output end of the rectifier bridge forms the first positive DC output end, and the negative output end of the rectifier bridge forms the second positive DC output end.

6. The redundant power supply device for a nuclear power plant according to claim 5, wherein: The AC power supply unit further includes: a first resistor and a second resistor; The first AC input terminal of the rectifier bridge is connected to the first terminal of the first resistor, the second AC input terminal of the rectifier bridge is connected to the first terminal of the second resistor, the positive output terminal of the rectifier bridge forms the first positive DC output terminal, and the negative output terminal of the rectifier bridge forms the second positive DC output terminal; The second end of the first resistor and the second end of the second resistor are used to input corresponding AC power.

7. The redundant power supply device for a nuclear power plant according to claim 3, wherein: The DC power supply unit includes: a first diode and a second diode; The anode of the first diode is connected to the positive electrode of the corresponding DC power supply, and the cathode of the first diode forms the second positive DC output terminal; The cathode of the second diode is connected to the negative electrode of the corresponding DC power supply, and the anode of the second diode forms the second negative DC output terminal.

8. The redundant power supply device for a nuclear power plant according to claim 7, wherein: The DC power supply unit further includes: a third resistor; The anode of the first diode is connected to the positive electrode of the corresponding DC power supply through the third resistor.

9. The redundant power supply device for a nuclear power plant according to any one of claims 1 to 8, characterized in that: There are two power supply modules.

10. A UPS power supply, characterized in that: Comprising a redundant power supply device and a control module for a nuclear power plant as claimed in any one of claims 1 to 9; The redundant power supply device for the nuclear power plant is used to supply power to the control module.

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