Nuclear power plant comprising independent bypass control

Abstract

The application provides a nuclear power supply device comprising independent bypass control, including a main control module, an independent bypass control module and a voltage sampling module; the voltage sampling module collects total output voltage and bypass voltage of the nuclear power supply device; the main control module outputs a first inverter main path operation signal and a first bypass operation signal; when the first inverter main path operation signal is a first signal, the total output voltage is abnormal and the bypass voltage is normal, the independent bypass control module determines that an inverter main path driving signal is a second driving signal and a bypass driving signal is a third driving signal, instructs the inverter main path switch to be turned off, the inverter main path to not supply power, instructs the bypass switch to be turned on and the bypass to supply power. The application can control the bypass to supply power for the load when the main control module instructs the inverter main path to work, but the total output voltage is abnormal and the bypass voltage is normal due to reasons such as sampling failure or connection line fault, so that the nuclear power supply device can normally supply power and the power supply demand is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power supply, in particular to a nuclear power supply device containing independent bypass control. BACKGROUND

[0002] In order to ensure uninterrupted power supply, the conventional power supply device usually includes an inverter main supply and a bypass supply. When the inverter main supply has a problem, the bypass supply is used.

[0003] At present, the switching of the inverter main supply and the bypass supply of the power supply device is controlled by a main control module. The main control module determines whether to switch the bypass supply by detecting whether the input of the inverter main supply can normally supply power. However, this control mode may cause the power supply device to output power failure or output voltage lower than normal power supply voltage due to sampling failure or connection line fault, etc., and cannot meet the power supply demand. SUMMARY

[0004] The embodiment of the present application provides a nuclear power supply device containing independent bypass control, so as to solve the problem that the existing control mode may cause the power supply device to output power failure or output voltage lower than normal power supply voltage due to sampling failure or connection line fault, etc., and cannot meet the power supply demand.

[0005] In a first aspect, the embodiment of the present application provides a nuclear power supply device containing independent bypass control, comprising a main control module, an independent bypass control module and a voltage sampling module;

[0006] The voltage sampling module is used for collecting the total output voltage and the bypass voltage of the nuclear power supply device.

[0007] The main control module is used for outputting a first inverter main running signal and a first bypass running signal.

[0008] The independent bypass control module is used for determining that the inverter main drive signal is a second drive signal and the bypass drive signal is a third drive signal when the first inverter main running signal is a first signal, the total output voltage is abnormal and the bypass voltage is normal; the first signal is used for indicating the inverter main running; the inverter main drive signal is used for controlling the state of the inverter main switch, and the second drive signal is used for indicating that the inverter main switch is turned off and the inverter main supply is not supplied; the bypass drive signal is used for controlling the state of the bypass switch, and the third drive signal is used for indicating that the bypass switch is turned on and the bypass supply is supplied.

[0009] In a possible implementation manner, the independent bypass control module comprises an independent bypass control unit and a drive unit.

[0010] The independent bypass control unit is configured to determine the second inverter main path operation signal as the second signal and the second bypass operation signal as the third signal when the first inverter main path operation signal is the first signal and the total output voltage is abnormal, and determine the third bypass operation signal as the third signal when the bypass voltage is normal; the second signal is used to indicate that the inverter main path does not operate, and the third signal is used to indicate that the bypass operates;

[0011] The driving unit is configured to determine the inverter main path driving signal as the second driving signal when the first inverter main path operation signal is the first signal and the second inverter main path operation signal is the second signal, and determine the bypass driving signal as the third driving signal when the second bypass operation signal is the third signal and the third bypass operation signal is the third signal.

[0012] In a possible implementation, the independent bypass control unit is further configured to determine the second inverter main path operation signal as the first signal and the second bypass operation signal as the fourth signal when the first inverter main path operation signal is the first signal and the total output voltage is normal, determine the second inverter main path operation signal as the second signal and the second bypass operation signal as the third signal when the first inverter main path operation signal is the second signal, and determine the third bypass operation signal as the fourth signal when the bypass voltage is abnormal.

[0013] The fourth signal is used to indicate that the bypass does not operate.

[0014] In a possible implementation, the nuclear power supply device comprising the independent bypass control further comprises a main power supply and a bypass backup power supply.

[0015] The main control module is powered by the main power supply, and the driving unit, the independent bypass control unit and the voltage sampling module are jointly powered by the main power supply and the bypass backup power supply.

[0016] The independent bypass control unit is configured to determine and output the second inverter main path operation signal and the second bypass operation signal according to the first inverter main path operation signal, the total output voltage and the voltage of the main power supply.

[0017] In a possible implementation, the independent bypass control unit is specifically configured to determine the second inverter main path operation signal as the first signal and the second bypass operation signal as the fourth signal when the first inverter main path operation signal is the first signal, the total output voltage is normal and the voltage of the main power supply is normal, and determine the second inverter main path operation signal as the second signal and the second bypass operation signal as the third signal when the first inverter main path operation signal is the second signal, the total output voltage is abnormal or the voltage of the main power supply is abnormal.

[0018] The fourth signal is used to indicate that the bypass does not operate.

[0019] In a possible implementation, the independent bypass control unit comprises a first voltage detection unit, a second voltage detection unit, a third voltage detection unit, a first AND gate, a second AND gate, and a NOT gate;

[0020] The first voltage detection unit is configured to detect whether the total output voltage is normal, and output a total output voltage detection signal;

[0021] The second voltage detection unit is configured to detect whether the bypass voltage is normal, and output a third bypass operation signal;

[0022] The third voltage detection unit is configured to detect whether the voltage of the main power supply is normal, and output a main power supply voltage detection signal;

[0023] The first AND gate takes the total output voltage detection signal and the first inverter main circuit operation signal as inputs, and outputs a third inverter main circuit operation signal;

[0024] The second AND gate takes the third inverter main circuit operation signal and the main power supply voltage detection signal as inputs, and outputs a second inverter main circuit operation signal;

[0025] The NOT gate takes the second inverter main circuit operation signal as an input, and outputs a second bypass operation signal.

[0026] In a possible implementation, the independent bypass control unit further comprises a latch;

[0027] The latch is configured to latch the third inverter main circuit operation signal when the third inverter main circuit operation signal output by the first AND gate is a second signal;

[0028] The second AND gate takes the output signal of the latch and the main power supply voltage detection signal as inputs, and outputs the second inverter main circuit operation signal.

[0029] In a possible implementation, the driving unit is further configured to: determine that the inverter main circuit driving signal is a first driving signal when the first inverter main circuit operation signal is a first signal and the second inverter main circuit operation signal is the first signal, and determine that the inverter main circuit driving signal is a second driving signal when the first inverter main circuit operation signal is the second signal, and determine that the bypass driving signal is a third driving signal when the first bypass operation signal is a third signal and the third bypass operation signal is the third signal, or determine that the bypass driving signal is a fourth driving signal when the first bypass operation signal is a fourth signal and the second bypass operation signal is the fourth signal, or when the third bypass operation signal is the fourth signal;

[0030] The fourth signal is configured to indicate that the bypass is not running;

[0031] The first driving signal is configured to indicate that the inverter main circuit switch is turned on and the inverter main circuit is powered; and the fourth driving signal is configured to indicate that the bypass switch is turned off and the bypass is not powered.

[0032] In a possible implementation, the driving unit comprises a third AND gate, an OR gate and a fourth AND gate;

[0033] The third AND gate takes the first inverter main path operation signal and the second inverter main path operation signal as input and outputs an inverter main path driving signal;

[0034] The OR gate takes the first bypass operation signal and the second bypass operation signal as input and outputs a fourth bypass operation signal;

[0035] The fourth AND gate takes the third bypass operation signal and the fourth bypass operation signal as input and outputs a bypass driving signal.

[0036] In a possible implementation, the total output voltage is the voltage after the outputs of the inverter main path switch and the bypass switch are connected in parallel, and the bypass voltage is the input voltage of the bypass switch.

[0037] The embodiment of the present application provides a nuclear power supply device comprising independent bypass control, which comprises a main control module, an independent bypass control module and a voltage sampling module; the voltage sampling module can collect the total output voltage and the bypass voltage of the nuclear power supply device; the main control module is used for outputting the control signals of the inverter main path and the bypass when the independent bypass control is not added, i.e. the first inverter main path operation signal and the first bypass operation signal; the independent bypass control module is used for controlling the bypass to work and supply power to the load when the first inverter main path operation signal is the first signal, the total output voltage is abnormal and the bypass voltage is normal, i.e. when the main control module indicates that the inverter main path works, but the total output voltage is abnormal (the inverter main path works abnormally) due to sampling failure or connection line fault and the like, at this moment, if it is detected that the bypass voltage is normal, the bypass is controlled to work, thereby the nuclear power supply device can supply power normally even when the sampling failure or the connection line fault and the like occur, and the power supply demand can be met. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0039] Figure 1 is a structural schematic diagram of a nuclear power supply device comprising independent bypass control provided by an embodiment of the present application;

[0040] Figure 2 is a structural schematic diagram of a nuclear power supply device comprising independent bypass control provided by another embodiment of the present application;

[0041] Figure 3 is a structural schematic diagram of a nuclear power supply device with independent bypass control provided by another embodiment of the present application. DETAILED DESCRIPTION

[0042] In the following description, specific details are set forth, such as particular system configurations, techniques, etc., in order to provide a thorough understanding of the embodiments of the present application. However, persons skilled in the art will understand that the present application can be practiced without these specific details. In other instances, well-known structures, devices, circuits, and methods have not been described in detail in order to avoid obscuring the present application.

[0043] In order to make the objects, technical solutions and advantages of the present application clearer, the following will be described in detail through specific embodiments in conjunction with the accompanying drawings.

[0044] Referring to Figure 1 and Figure 2 which shows a structural schematic diagram of a nuclear power supply device with independent bypass control provided by an embodiment of the present application. The nuclear power supply device with independent bypass control includes a main control module 11, an independent bypass control module 13 and a voltage sampling module 12.

[0045] The voltage sampling module 12 is configured to collect a total output voltage U1 and a bypass voltage U2 of the nuclear power supply device.

[0046] The main control module 11 is configured to output a first inverter main path operation signal N1 and a first bypass operation signal P1.

[0047] The independent bypass control module 13 is configured to determine that an inverter main path driving signal D1 is a second driving signal and a bypass driving signal D2 is a third driving signal when the first inverter main path operation signal N1 is a first signal, the total output voltage U1 is abnormal and the bypass voltage U2 is normal. The first signal is used to indicate inverter main path operation. The inverter main path driving signal D1 is used to control the state of an inverter main path switch K1. The second driving signal is used to indicate that the inverter main path switch K1 is turned off, and the inverter main path is not powered. The bypass driving signal D2 is used to control the state of a bypass switch K2. The third driving signal is used to indicate that the bypass switch K2 is turned on, and the bypass is powered.

[0048] The voltage sampling module 12 and the main control module 11 are both connected with the independent bypass control module 13. The independent bypass control module 13 is configured to output the inverter main path driving signal D1 used to control the state of the inverter main path switch K1 and the bypass driving signal D2 used to control the state of the bypass switch K2.

[0049] Referring to Figure 1The inverter main circuit supplies power to the load through the inverter main circuit switch K1. The state of the inverter main circuit switch K1 affects the working state of the inverter main circuit. When the inverter main circuit switch K1 is off, the inverter main circuit does not supply power to the load. When the inverter main circuit switch K1 is on, the inverter main circuit can supply power to the load. The bypass supplies power to the load through the bypass switch K2. The state of the bypass switch K2 affects the working state of the bypass. When the bypass switch K2 is off, the bypass does not supply power to the load. When the bypass switch K2 is on, the bypass can supply power to the load.

[0050] In order to ensure the reliability of the power supply device, the inverter main circuit and the bypass are connected to different input sources. When one of them cannot supply power normally, the other one is switched to supply power.

[0051] The inverter main circuit switch K1 and the bypass switch K2 can be static switches SCR. For example, the inverter main circuit switch K1 is a first static switch, and the bypass switch K2 is a second static switch.

[0052] The first inverter main circuit operation signal N1 and the first bypass operation signal P1 output by the main control module 11 are signals for driving the inverter main circuit switch K1 and the bypass switch K2 respectively when the independent bypass control module 13 is not included. That is, when the independent bypass control module 13 is not set, the first inverter main circuit operation signal N1 is used as an inverter main circuit driving signal D1 to control the state of the inverter main circuit switch K1. When it is a first signal, the inverter main circuit switch K1 is driven to be on, the inverter main circuit operates (supplies power), and when it is a second signal, the inverter main circuit switch K1 is off, and the inverter main circuit does not operate (does not supply power). When the independent bypass control module 13 is not set, the first bypass operation signal P1 is used as a bypass driving signal D2 to control the state of the bypass switch K2. When it is a third signal, the bypass switch K2 is driven to be on, the bypass operates (supplies power), and when it is a fourth signal, the bypass switch K2 is off, and the bypass does not operate (does not supply power).

[0053] The first inverter main circuit operation signal N1 and the first bypass operation signal P1 do not indicate that the inverter main circuit and the bypass operate at the same time. The first inverter main circuit operation signal N1 and the first bypass operation signal P1 can be opposite signals. That is, when the first inverter main circuit operation signal N1 is a first signal, indicating that the inverter main circuit switch K1 is on, the first bypass operation signal P1 is a fourth signal, indicating that the bypass switch K2 is off. When the first inverter main circuit operation signal N1 is a second signal, indicating that the inverter main circuit switch K1 is off, the first bypass operation signal P1 is a third signal, indicating that the bypass switch K2 is on. Or, the first inverter main circuit operation signal N1 is a second signal and the first bypass operation signal P1 is a fourth signal.

[0054] The first signal, the second signal, the third signal and the fourth signal can be set according to actual requirements. The first signal and the second signal are opposite, and the third signal and the fourth signal are opposite. For example, the first signal can be "1", the second signal can be "0", the third signal can be "1", and the fourth signal can be "0".

[0055] For example, when the switch signal is "1" and the inverter comprehensive protection signal is "1", the main control module 11 can determine that the first inverter main circuit operation signal N1 is the first signal and the first bypass operation signal P1 is the fourth signal; when the switch signal is "0" or the inverter comprehensive protection signal is "0", the main control module 11 can determine that the first inverter main circuit operation signal N1 is the second signal, and when the first inverter main circuit operation signal N1 is the second signal and the bypass comprehensive protection signal is "1", the main control module 11 can determine that the first bypass operation signal P1 is the third signal; if the bypass comprehensive protection signal is "0", the main control module 11 can determine that the first bypass operation signal P1 is the fourth signal. When in the boot state, the switch signal is "1", otherwise, the switch signal is "0". When the main control module 11 preliminarily detects that the state of the inverter main circuit is normal and can be normally operated, the inverter comprehensive protection signal is "1", otherwise, the inverter comprehensive protection signal is "0". When the main control module 11 preliminarily detects that the state of the bypass is normal and can be normally operated, the bypass comprehensive protection signal is "1", otherwise, the bypass comprehensive protection signal is "0".

[0056] In order to ensure that the nuclear power supply device supplies power normally, that is, does not drop or the output voltage is lower than the normal power supply voltage, when the main control module 13 detects that the first inverter main circuit operation signal N1 is the first signal, that is, indicates that the main circuit is running, if it is detected that the total output voltage U1 is abnormal and the bypass voltage U2 is normal, it indicates that the inverter main circuit operation cannot guarantee the normal output voltage, and in the case that the bypass voltage U2 is normal, the bypass switch K2 can be driven to be turned on, powered by the bypass, and the inverter main circuit switch K1 is controlled to be turned off, and the inverter main circuit stops supplying power.

[0057] The total output voltage U1 is abnormal, which means that the total output voltage U1 is less than the preset normal voltage, and the bypass voltage U2 is normal, which means that the bypass voltage U2 is greater than or equal to the preset normal voltage. The preset normal voltage can be set according to actual requirements, which can be the minimum voltage when the nuclear power supply device supplies power normally.

[0058] In some possible implementations, the nuclear power supply device containing the independent bypass control can be an uninterruptible power supply device, which is applied to a nuclear power plant.

[0059] The nuclear power supply device provided by the embodiment comprises a main control module 11, an independent bypass control module 13 and a voltage sampling module 12. The voltage sampling module 12 can collect the total output voltage U1 and the bypass voltage U2 of the nuclear power supply device. The main control module 11 is used to output the control signals of the inverter main circuit and the bypass in the state without the independent bypass control, i.e. the first inverter main circuit operation signal N1 and the first bypass operation signal P1. When the first inverter main circuit operation signal N1 is the first signal, the total output voltage U1 is abnormal and the bypass voltage U2 is normal, i.e. the main control module 11 indicates that the inverter main circuit works, but the total output voltage U1 is abnormal (the inverter main circuit works abnormally) due to sampling failure or connection line fault, etc., at this time, if it is detected that the bypass voltage U2 is normal, the bypass works to supply power to the load, so that the nuclear power supply device can supply power normally even when sampling failure or connection line fault, etc. occurs, and the power supply demand is met.

[0060] In some embodiments, referring to Figure 2 , the independent bypass control module 13 comprises an independent bypass control unit 131 and a driving unit 132.

[0061] The independent bypass control unit 131 is used to determine that the second inverter main circuit operation signal N2 is the second signal and the second bypass operation signal P2 is the third signal when the first inverter main circuit operation signal N1 is the first signal and the total output voltage U1 is abnormal, and determine that the third bypass operation signal P3 is the third signal when the bypass voltage U2 is normal. The second signal is used to indicate that the inverter main circuit does not work, and the third signal is used to indicate that the bypass works.

[0062] The driving unit 132 is used to determine that the inverter main circuit driving signal D1 is the second driving signal when the first inverter main circuit operation signal N1 is the first signal and the second inverter main circuit operation signal N2 is the second signal, and determine that the bypass driving signal D2 is the third driving signal when the second bypass operation signal P2 is the third signal and the third bypass operation signal P3 is the third signal.

[0063] The main control module 11 and the voltage sampling module 12 are connected with the independent bypass control unit 131, the independent bypass control unit 131 is connected with the driving unit 132, the main control module 11 is connected with the driving unit 132, and the driving unit 132 is used to send the inverter main circuit driving signal D1 to the inverter main circuit switch K1 and send the bypass driving signal D2 to the bypass switch K2.

[0064] In the embodiment, the independent bypass control unit 131 can generate and output the second inverter main circuit operation signal N2 and the second bypass operation signal P2 based on the first inverter main circuit operation signal N1 and the total output voltage U1, and generate and output the third bypass operation signal P3 based on the bypass voltage U2. The second inverter main circuit operation signal N2 and the second bypass operation signal P2 are opposite signals, that is, when the second inverter main circuit operation signal N2 is the first signal indicating that the inverter main circuit switch K1 is turned on, the second bypass operation signal P2 is the fourth signal indicating that the bypass switch K2 is turned off; when the second inverter main circuit operation signal N2 is the second signal indicating that the inverter main circuit switch K1 is turned off, the second bypass operation signal P2 is the third signal indicating that the bypass switch K2 is turned on. The first signal and the third signal are both signals indicating operation, for example, both can be “1”, but in order to distinguish the inverter main circuit and the bypass operation, two different signal names are used, and for the same reason, the second signal and the fourth signal are both signals indicating non-operation, for example, both can be “0”, but in order to distinguish the inverter main circuit and the bypass non-operation, two different signal names are used.

[0065] The driving unit 132 can generate and output the inverter main circuit driving signal D1 according to the first inverter main circuit operation signal N1 and the second inverter main circuit operation signal N2, and generate and output the bypass driving signal D2 according to the first bypass operation signal P1, the second bypass operation signal P2 and / or the third bypass operation signal P3.

[0066] In some embodiments, the independent bypass control unit 131 is further configured to: when the first inverter main circuit operation signal N1 is the first signal and the total output voltage U1 is normal, determine that the second inverter main circuit operation signal N2 is the first signal and the second bypass operation signal P2 is the fourth signal, and when the first inverter main circuit operation signal N1 is the second signal, determine that the second inverter main circuit operation signal N2 is the second signal and the second bypass operation signal P2 is the third signal, and when the bypass voltage U2 is abnormal, determine that the third bypass operation signal P3 is the fourth signal.

[0067] The fourth signal is used to indicate that the bypass is not in operation.

[0068] In the embodiment, the independent bypass control unit 131 determines the second inverter main path operation signal N2 as the first signal and the second bypass operation signal P2 as the fourth signal when the first inverter main path operation signal N1 is the first signal and the total output voltage U1 is normal, and determines the second inverter main path operation signal N2 as the second signal and the second bypass operation signal P2 as the third signal when the first inverter main path operation signal N1 is the second signal or the total output voltage U1 is abnormal. That is, the independent bypass control unit 131 outputs the second inverter main path operation signal N2 indicating the inverter main path operation and the second bypass operation signal P2 indicating the bypass non-operation when the main control module 11 instructs the inverter main path operation and the total output voltage U1 is normal, indicating that the inverter main path can operate normally, and outputs the second inverter main path operation signal N2 indicating the inverter main path non-operation and the second bypass operation signal P2 indicating the bypass operation when the main control module 11 instructs the inverter main path non-operation or the total output voltage U1 is abnormal, indicating that the main control module 11 controls the inverter main path non-operation based on its own logic or the total output voltage U1 is abnormal due to disconnection of a certain line or failure of a certain device of the inverter main path.

[0069] If the bypass power supply is needed, the bypass voltage U2 needs to be normal to supply power normally, and therefore the independent bypass control unit 131 is further configured to determine the third bypass operation signal P3 as the third signal when the bypass voltage U2 is normal and determine the third bypass operation signal P3 as the fourth signal when the bypass voltage U2 is abnormal. That is, the independent bypass control unit 131 outputs the third bypass operation signal P3 indicating the bypass operation when the bypass voltage U2 is normal, and outputs the third bypass operation signal P3 indicating the bypass non-operation when the bypass voltage U2 is abnormal (possibly due to disconnection of a certain line or failure of a certain device of the bypass).

[0070] Here, the total output voltage U1 normal means that the total output voltage U1 is greater than or equal to a preset normal voltage, and the bypass voltage U2 abnormal means that the bypass voltage U2 is less than the preset normal voltage.

[0071] In some embodiments, the nuclear power supply device comprising the independent bypass control further comprises a main power supply and a bypass backup power supply.

[0072] The main control module 11 is powered by the main power supply, and the driving unit 132, the independent bypass control unit 131 and the voltage sampling module 12 are powered by the main power supply and the bypass backup power supply.

[0073] Referring to Figure 3 The independent bypass control unit 131 is configured to determine and output the second inverter main path operation signal N2 and the second bypass operation signal P2 according to the first inverter main path operation signal N1, the total output voltage U1 and the voltage U3 of the main power supply.

[0074] In order to ensure the reliability of the independent bypass control module 13 and the voltage sampling module 12, a main power supply and a bypass standby power supply are used to supply power to the two modules, and when one of the power supplies fails, the other power supply can supply power. In addition, in order to improve the reliability of the main control module 11, the main power supply can be supplied by two power supply boards, and when one of the power supply boards fails, the other power supply board can supply power, and when both of the power supply boards fail, the main power supply fails.

[0075] The main control module 11 can be integrated on a control board; the independent bypass control unit 131 and the driving unit 132 can be integrated on one driving board or separately arranged on two driving boards, which is not specifically limited here.

[0076] Since the main control module 11 is independently supplied by the main power supply, the independent bypass control unit 131 also needs to consider the voltage U3 of the main power supply to determine the second inverter main circuit operation signal N2 and the second bypass operation signal P2.

[0077] In some embodiments, referring to Figure 3 The independent bypass control unit 131 is specifically configured to: when the first inverter main circuit operation signal N1 is a first signal, the total output voltage U1 is normal, and the voltage U3 of the main power supply is normal, determine that the second inverter main circuit operation signal N2 is the first signal and the second bypass operation signal P2 is a fourth signal, and when the first inverter main circuit operation signal N1 is a second signal, the total output voltage U1 is abnormal, or the voltage U3 of the main power supply is abnormal, determine that the second inverter main circuit operation signal N2 is the second signal and the second bypass operation signal P2 is a third signal.

[0078] The fourth signal is used to indicate that the bypass does not operate.

[0079] In this embodiment, when the main control module 11 indicates that the inverter main circuit operates and the total output voltage U1 is normal and the voltage U3 of the main power supply is normal, it means that the main control module 11 can work normally and the inverter main circuit can work normally. At this time, the independent bypass control unit 131 can output the second inverter main circuit operation signal N2 indicating that the inverter main circuit operates and the second bypass operation signal P2 indicating that the bypass does not operate. When the main control module 11 indicates that the inverter main circuit does not operate, or the total output voltage U1 is abnormal, or the voltage U3 of the main power supply is abnormal, it means that the main control module 11 controls the inverter main circuit to not operate based on its own logic, or the total output voltage U1 is abnormal due to the disconnection of a certain line or the failure of a certain device of the inverter main circuit, or the voltage U3 of the main power supply is abnormal, causing the main control module 11 to fail to work normally. At this time, the independent bypass control unit 131 outputs the second inverter main circuit operation signal N2 indicating that the inverter main circuit does not operate and the second bypass operation signal P2 indicating that the bypass operates.

[0080] The voltage U3 of the main power supply is normal means that the main power supply can provide the voltage required by the main control module 11, and the voltage U3 of the main power supply is abnormal means that the main power supply cannot provide the voltage required by the main control module 11.

[0081] In some embodiments, referring to Figure 3 The independent bypass control unit 131 includes a first voltage detection unit J1, a second voltage detection unit J2, a third voltage detection unit J3, a first AND gate AND1, a second AND gate AND2, and a NOT gate NOT.

[0082] The first voltage detection unit J1 is configured to detect whether the total output voltage U1 is normal, and output a total output voltage detection signal.

[0083] The second voltage detection unit J2 is configured to detect whether the bypass voltage U2 is normal, and output a third bypass operation signal P3.

[0084] The third voltage detection unit J3 is configured to detect whether the voltage U3 of the main power supply is normal, and output a main power supply voltage detection signal.

[0085] The first AND gate AND1 takes the total output voltage detection signal and the first inverter main path operation signal N1 as inputs, and outputs a third inverter main path operation signal.

[0086] The second AND gate AND2 takes the third inverter main path operation signal and the main power supply voltage detection signal as inputs, and outputs a second inverter main path operation signal N2.

[0087] The NOT gate NOT takes the second inverter main path operation signal N2 as input, and outputs the second bypass operation signal P2.

[0088] The first voltage detection unit J1 is connected with the voltage sampling module 12 and the first AND gate AND1 respectively, the second voltage detection unit J2 is connected with the voltage sampling module 12 and the driving unit 132 respectively, the first AND gate AND1 is further connected with the main control module 11 and the second AND gate AND2, the second AND gate AND2 is further connected with the third voltage detection unit J3, the driving unit 132 and the NOT gate NOT, and the NOT gate NOT is connected with the driving unit 132.

[0089] In some possible implementations, the voltage sampling module 12 can collect the voltage U3 of the main power supply and send it to the third voltage detection unit J3.

[0090] The first voltage detection unit J1, the second voltage detection unit J2 and the third voltage detection unit J3 can be hardware circuits for realizing voltage detection.

[0091] Exemplarily, the first voltage detection unit J1 can determine the total output voltage U1 detection signal as "1" when the total output voltage U1 is normal, and determine the total output voltage U1 detection signal as "0" when the total output voltage U1 is abnormal. The second voltage detection unit J2 can determine the third bypass operation signal P3 as the third signal, i.e. "1", when the bypass voltage U2 is normal, and determine the third bypass operation signal P3 as the fourth signal, i.e. "0", when the bypass voltage U2 is abnormal. The third voltage detection unit J3 can determine the main power supply voltage detection signal as "1" when the voltage U3 of the main power supply is normal, and determine the main power supply voltage detection signal as "0" when the voltage U3 of the main power supply is abnormal. The first AND gate AND1 can determine the third inverter main circuit operation signal as the first signal, i.e. "1", when the total output voltage U1 detection signal is "1" and the first inverter main circuit operation signal N1 is the first signal, and otherwise determine the third inverter main circuit operation signal as the second signal, i.e. "0". The second AND gate AND2 can determine the second inverter main circuit operation signal N2 as the first signal, i.e. "1", when the third inverter main circuit operation signal is the first signal and the main power supply voltage detection signal is "1", and otherwise determine the second inverter main circuit operation signal N2 as the second signal, i.e. "0". The NOT gate NOT can determine the second bypass operation signal P2 as the fourth signal, i.e. "0", when the second inverter main circuit operation signal N2 is the first signal, i.e. "1", and determine the second bypass operation signal P2 as the third signal, i.e. "1", when the second inverter main circuit operation signal N2 is the second signal, i.e. "0".

[0092] In some possible implementation manners, the independent bypass control unit 131 further comprises a signal filter connected with the main control module 11 and the first AND gate AND1 respectively, and configured to perform signal filtering on the first inverter main circuit operation signal N1 and input the filtered first inverter main circuit operation signal N1 to the first AND gate AND1.

[0093] In order to ensure the accuracy of the signals, a corresponding signal filter can be added after each signal to perform filtering.

[0094] In some embodiments, referring to Figure 3 , the independent bypass control unit 131 further comprises a latch S1;

[0095] The latch S1 is configured to latch the third inverter main circuit operation signal when the third inverter main circuit operation signal output by the first AND gate AND1 is the second signal.

[0096] The second AND gate AND2 takes the output signal of the latch S1 and the main power supply voltage detection signal as inputs and outputs the second inverter main circuit operation signal N2.

[0097] The latch S1 is connected with the first AND gate AND1 and the second AND gate AND2 respectively, and can latch the third inverter main circuit operation signal (second signal) when the third inverter main circuit operation signal is the second signal. When the third inverter main circuit operation signal is the first signal, the third inverter main circuit operation signal is not latched.

[0098] If the latch S1 is not set, assuming that the total output voltage U1 is abnormal due to a line problem or a device damage problem of the inverter main circuit, but the bypass voltage U2 is normal, at this time, the third inverter main circuit operation signal output by the first AND gate AND1 is the second signal, and the second inverter main circuit operation signal N2 output by the second AND gate AND2 is also the second signal, resulting in that the inverter main circuit driving signal D1 output by the driving unit 132 controls the inverter main circuit switch K1 to be turned off, and at this time, the bypass voltage U2 is normal, the bypass switch K2 can be controlled to be turned on, and when the bypass is powered, the total output voltage U1 is normal, at this time, when other conditions are met, the inverter main circuit driving signal D1 will drive the inverter main circuit switch K1 to be turned on, and the bypass driving signal D2 will control the bypass switch K2 to be turned off. However, the line problem or the device damage problem of the inverter main circuit still exists, at this time, the total output voltage U1 is abnormal, and the bypass switch K2 is still driven to be turned on, and the inverter main circuit switch K1 is turned off. That is, if the latch S1 is not set, the inverter main circuit switch K1 and the bypass switch K2 will be switched back and forth, affecting the reliability.

[0099] After the latch S1 is added, when the third inverter main circuit operation signal output by the first AND gate AND1 is the second signal due to the above-mentioned problem, the latch S1 latches the signal, the third inverter main circuit operation signal input into the second AND gate AND2 remains the second signal unchanged, and thus the bypass switch K2 is kept turned on and the inverter main circuit switch K1 is kept turned off, and will not be switched back and forth. The latch S1 is provided with a corresponding button, and the latch S1 can be switched to no longer latch through the button.

[0100] In some embodiments, referring to Figure 3 , the driving unit 132 is further configured to: determine the inverter main circuit driving signal D1 to be a first driving signal when the first inverter main circuit operation signal N1 is the first signal and the second inverter main circuit operation signal N2 is the first signal, and determine the inverter main circuit driving signal D1 to be a second driving signal when the first inverter main circuit operation signal N1 is the second signal, and determine the bypass driving signal D2 to be a third driving signal when the first bypass operation signal P1 is a third signal and the third bypass operation signal P3 is the third signal, and determine the bypass driving signal D2 to be a fourth driving signal when the first bypass operation signal P1 is a fourth signal and the second bypass operation signal P2 is the fourth signal, or when the third bypass operation signal P3 is the fourth signal;

[0101] The fourth signal is used to indicate that the bypass is not running.

[0102] The first driving signal is used to indicate that the inverter main path switch K1 is turned on, and the inverter main path is powered.

[0103] In the embodiment, the driving unit 132 can determine that the inverter main path driving signal D1 is the first driving signal when the first inverter main path operation signal N1 is the first signal and the second inverter main path operation signal N2 is the first signal, that is, the inverter main path switch K1 is driven to be turned on, and determine that the inverter main path driving signal D1 is the second driving signal when the first inverter main path operation signal N1 is the second signal or the second inverter main path operation signal N2 is the second signal, that is, the inverter main path switch K1 is controlled to be turned off. That is, when the main control module 11 indicates that the inverter main path is running and the independent bypass control unit 131 indicates that the inverter main path is running, the inverter main path switch K1 is controlled to be turned on, and the inverter main path is powered; when the main control module 11 indicates that the inverter main path is not running or the independent bypass control unit 131 indicates that the inverter main path is not running, the inverter main path switch K1 is controlled to be turned off, and the inverter main path is not powered.

[0104] The driving unit 132 is further configured to determine that the bypass driving signal D2 is the third driving signal when the first bypass operation signal P1 is the third signal and the third bypass operation signal P3 is the third signal, or when the second bypass operation signal P2 is the third signal and the third bypass operation signal P3 is the third signal, and determine that the bypass driving signal D2 is the fourth driving signal when the first bypass operation signal P1 is the fourth signal and the second bypass operation signal P2 is the fourth signal, or when the third bypass operation signal P3 is the fourth signal. That is, when the main control module 11 indicates that the bypass is running and the bypass voltage U2 is normal, or when the independent bypass control unit 131 indicates that the bypass is running due to the total output voltage U1 being abnormal or the voltage U3 of the main power supply being abnormal or the main control module 11 indicating that the inverter main path is not running, and the bypass voltage U2 is normal, the bypass switch K2 is controlled to be turned on, and the bypass is powered; when the main control module 11 indicates that the bypass is not running and the independent bypass control unit 131 indicates that the bypass is not running, or when the bypass voltage U2 is abnormal, the bypass switch K2 is controlled to be turned off, and the bypass is not powered.

[0105] In some embodiments, referring to Figure 3 , the driving unit 132 includes a third AND gate AND3, an OR gate OR, and a fourth AND gate AND4;

[0106] The third AND gate AND3 takes the first inverter main path operation signal N1 and the second inverter main path operation signal N2 as inputs and outputs the inverter main path driving signal D1;

[0107] The OR gate OR takes the first bypass operation signal P1 and the second bypass operation signal P2 as inputs and outputs the fourth bypass operation signal;

[0108] The fourth AND gate AND4 takes the third bypass operation signal P3 and the fourth bypass operation signal as inputs and outputs a bypass driving signal D2.

[0109] The third AND gate AND3 is connected with the master control module 11, the independent bypass control unit 131 and the inverter main circuit switch K1 respectively, or the OR gate is connected with the master control module 11, the independent bypass control unit 131 and the fourth AND gate AND4, and the fourth AND gate AND4 is further connected with the independent bypass control unit 131 and the bypass switch K2.

[0110] The third AND gate AND3 determines that the inverter main circuit driving signal D1 is a first driving signal when the first inverter main circuit operation signal N1 is the first signal and the second inverter main circuit operation signal N2 is the first signal, drives the inverter main circuit switch K1 to be on, and the inverter main circuit is powered, otherwise, determines that the inverter main circuit driving signal D1 is a second driving signal, controls the inverter main circuit switch K1 to be off, and the inverter main circuit is not powered. The OR gate determines that the fourth bypass operation signal is the third signal when the first bypass operation signal P1 is the third signal or the second bypass operation signal P2 is the third signal, otherwise, determines that the fourth bypass operation signal is the fourth signal. The fourth AND gate AND4 determines that the bypass driving signal D2 is a third driving signal when the third bypass operation signal P3 and the fourth bypass operation signal are both the third signal, drives the bypass switch K2 to be on, and the bypass is powered, otherwise, determines that the bypass driving signal D2 is a fourth driving signal, controls the bypass switch K2 to be off, and the bypass is not powered.

[0111] In the present application, in order to avoid common-cause failure, each device is an independent device and is not shared. For example, the first AND gate AND1, the second AND gate AND2, the third AND gate AND3 and the fourth AND gate AND4 are all independent AND gates, and so on.

[0112] In some embodiments, the total output voltage U1 is the voltage after the outputs of the inverter main circuit switch K1 and the bypass switch K2 are connected in parallel; and the bypass voltage U2 is the input voltage of the bypass switch K2.

[0113] Among them, the bypass is always in standby state, when it is fault-free, even if the bypass switch K2 is not on, the bypass voltage U2 can still detect normal voltage.

[0114] Referring to Figure 1 , the total output voltage U1 can be the voltage of the first sampling point M1, and the bypass voltage U2 can be the voltage of the second sampling point M2.

[0115] The embodiment of the present application judges whether the inverter main circuit can supply power normally by collecting the total output voltage when the inverter main circuit supplies power, and judges whether the bypass can supply power normally by collecting the bypass voltage, and further judges whether the bypass needs to be switched. In the prior art, whether the bypass needs to be switched is judged by collecting the states of the inverter main circuit switch and the bypass switch. For example, in the case that the inverter main circuit switch and the bypass switch are both disconnected, the bypass supplies power. When the inverter main circuit switch is connected, the bypass does not supply power. However, in the case that the inverter main circuit switch fails, for example, cannot be switched from the on state to the off state, if a section of the inverter main circuit or other devices fail to output normal voltage, the bypass needs to supply power, but the inverter main circuit switch is still in the on state, and according to the control logic, the bypass does not supply power, which causes the power supply to drop.

[0116] In addition, since the inverter main circuit switch and the bypass switch are both static switches, the states of the two switches cannot be directly obtained. The most direct and fastest method is to determine the states of the two switches by obtaining the driving signals of the two switches. If the connection between the driving of the inverter main circuit switch and the inverter main circuit switch fails, the inverter main circuit switch cannot be switched according to the driving signal. If the driving of the inverter main circuit switch indicates that the inverter main circuit switch is closed, due to the connection failure between the two, the inverter main circuit switch cannot receive the driving signal and cannot be closed and is still in the off state. However, according to the control logic, the bypass switch is not driven to be closed. However, the actual situation is that the inverter main circuit switch is not closed, which causes the power supply to drop.

[0117] The embodiment of the present application can ensure that the output drops in the case of inverter main circuit switch failure, inverter main circuit switch driving connection failure between the inverter main circuit switch, or other device or connection failure of the inverter main circuit, and can accurately determine the output drop and timely switch to the bypass power supply, which has high reliability.

[0118] For the nuclear power supply device with the independent bypass control described above, the following function verification is performed to ensure the effectiveness of the scheme.

[0119] First, in the case of no load and full load, the main control module can normally control the switching of the inverter main circuit and the bypass, and is not affected by the newly added independent bypass control unit.

[0120] Second, simulate the failure of the main power supply, and supply power to the independent bypass control module by the standby bypass power supply. The main control module is powered off. At this time, the inverter main circuit driving signal outputs the second driving signal, the bypass driving signal outputs the third driving signal, and the bypass supplies power.

[0121] Third, simulate the individual failure of the wire to the inverter main switch, resulting in output power failure; simulate the failure of the drive circuit components of the inverter main circuit, resulting in functional failure, and then resulting in output power failure; simulate the failure of the inverter main switch, resulting in output power failure; at this time, the inverter main switch is off, the total output voltage is abnormal, the bypass switch is opened, and the bypass power supply is supplied.

[0122] Fourth, simulate the individual failure of the wire to the drive unit of the main control module, resulting in output power failure; simulate the failure of the main control module switching circuit, resulting in switching failure, and then resulting in output power failure; at this time, the total output voltage is abnormal, the bypass switch is opened, and the bypass power supply is supplied.

[0123] Fifth, simulate the failure of the inverter main circuit fuse, resulting in output power failure, at this time the inverter main circuit output voltage suddenly drops, the total output voltage is abnormal, the inverter main switch is closed, and the bypass power supply is switched to.

[0124] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is exemplified, and in actual application, the above-mentioned functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be realized in the form of hardware or software function unit. In addition, the specific name of each functional unit and module is only for easy distinction, and does not limit the protection scope of the present application. The specific working process of the unit and module in the above-mentioned system can refer to the corresponding process in the foregoing method embodiment, which will not be described here.

[0125] In the above embodiments, the description of each embodiment has its own emphasis, and the parts not described or recorded in a certain embodiment can be referred to the related description of other embodiments.

[0126] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized in electronic hardware or a combination of computer software and electronic hardware. Whether the functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0127] In the embodiments provided by the present application, it should be understood that the mutual coupling or direct coupling or communication connection between the units or components shown or discussed can be indirect coupling or communication connection through some interfaces, devices or units, and can be in electrical, mechanical or other forms.

[0128] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e. can be located in one place, or can be distributed on multiple network units. Part or all of the units can be selected to achieve the purpose of the embodiments according to actual needs.

[0129] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically independently, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0130] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A nuclear power plant comprising independent bypass control, characterized in that, The nuclear power supply device comprises a main control module, an independent bypass control module and a voltage sampling module. The voltage sampling module is configured to collect a total output voltage and a bypass voltage of the nuclear power supply device. The main control module is configured to output a first inverter main circuit operation signal and a first bypass operation signal. The independent bypass control module is configured to determine that a first inverter main circuit driving signal is a second driving signal and a bypass driving signal is a third driving signal when the first inverter main circuit operation signal is a first signal, the total output voltage is abnormal and the bypass voltage is normal; the first signal is used to indicate that the inverter main circuit is running; the inverter main circuit driving signal is used to control the state of an inverter main circuit switch; the second driving signal is used to indicate that the inverter main circuit switch is turned off and the inverter main circuit is not powered; and the bypass driving signal is used to control the state of a bypass switch; and the third driving signal is used to indicate that the bypass switch is turned on and the bypass is powered. The independent bypass control module comprises an independent bypass control unit and a driving unit. The independent bypass control unit is configured to determine that a second inverter main circuit operation signal is a second signal and a second bypass operation signal is a third signal when the first inverter main circuit operation signal is a first signal and the total output voltage is abnormal, and determine that a third bypass operation signal is the third signal when the bypass voltage is normal; the second signal is used to indicate that the inverter main circuit is not running; and the third signal is used to indicate that the bypass is running. The driving unit is configured to determine that the inverter main circuit driving signal is the second driving signal when the first inverter main circuit operation signal is the first signal and the second inverter main circuit operation signal is the second signal, and determine that the bypass driving signal is the third driving signal when the second bypass operation signal is the third signal and the third bypass operation signal is the third signal.

2. A nuclear power plant comprising independent bypass control according to claim 1, characterized in that, The independent bypass control unit is further configured to determine that the second inverter main circuit operation signal is the first signal and the second bypass operation signal is a fourth signal when the first inverter main circuit operation signal is the first signal and the total output voltage is normal, determine that the second inverter main circuit operation signal is the second signal and the second bypass operation signal is the third signal when the first inverter main circuit operation signal is a second signal, and determine that the third bypass operation signal is the fourth signal when the bypass voltage is abnormal. The fourth signal is used to indicate that the bypass is not running.

3. The nuclear power plant of claim 1, wherein, The nuclear power supply device further comprises a main power supply and a bypass standby power supply. The main control module is powered by the main power supply, and the driving unit, the independent bypass control unit and the voltage sampling module are jointly powered by the main power supply and the bypass standby power supply. The independent bypass control unit is configured to determine and output the second inverter main circuit operation signal and the second bypass operation signal according to the first inverter main circuit operation signal, the total output voltage and the voltage of the main power supply.

4. A nuclear power plant according to claim 3, wherein, The independent bypass control unit is specifically configured to determine that the second inverter main path operation signal is a first signal and the second bypass operation signal is a fourth signal when the first inverter main path operation signal is a first signal, the total output voltage is normal, and the voltage of the main power supply is normal, and determine that the second inverter main path operation signal is a second signal and the second bypass operation signal is a third signal when the first inverter main path operation signal is a second signal, the total output voltage is abnormal, or the voltage of the main power supply is abnormal. The fourth signal is used for indicating that the bypass is not running.

5. The nuclear power plant of claim 3, wherein, The independent bypass control unit comprises a first voltage detection unit, a second voltage detection unit, a third voltage detection unit, a first AND gate, a second AND gate and a NOT gate. The first voltage detection unit is used for detecting whether the total output voltage is normal, and outputs a total output voltage detection signal. The second voltage detection unit is used for detecting whether the bypass voltage is normal, and outputs a third bypass operation signal. The third voltage detection unit is used for detecting whether the voltage of the main power supply is normal, and outputs a main power supply voltage detection signal. The first AND gate takes the total output voltage detection signal and the first inverter main path operation signal as inputs, and outputs a third inverter main path operation signal. The second AND gate takes the third inverter main path operation signal and the main power supply voltage detection signal as inputs, and outputs a second inverter main path operation signal. The NOT gate takes the second inverter main path operation signal as an input, and outputs a second bypass operation signal.

6. A nuclear power plant according to claim 5, wherein, The independent bypass control unit further comprises a latch. The latch is used for latching the third inverter main path operation signal when the third inverter main path operation signal output by the first AND gate is a second signal. The second AND gate takes the output signal of the latch and the main power supply voltage detection signal as inputs, and outputs a second inverter main path operation signal.

7. The nuclear power plant of claim 1, wherein, The driving unit is further configured to determine that an inverter main path driving signal is a first driving signal when the first inverter main path operation signal is a first signal and the second inverter main path operation signal is a first signal, determine that the inverter main path driving signal is a second driving signal when the first inverter main path operation signal is a second signal, and determine that a bypass driving signal is a third driving signal when the first bypass operation signal is a third signal and the third bypass operation signal is a third signal, determine that the bypass driving signal is a fourth driving signal when the first bypass operation signal is a fourth signal and the second bypass operation signal is a fourth signal, or when the third bypass operation signal is a fourth signal. The fourth signal is used for indicating that the bypass is not running. The first driving signal is used for indicating that the inverter main path switch is turned on and the inverter main path is powered, and the fourth driving signal is used for indicating that the bypass switch is turned off and the bypass is not powered.

8. A nuclear power plant according to claim 7, characterised in that, The driving unit comprises a third AND gate, an OR gate and a fourth AND gate. The third AND gate takes the first inverter main path operation signal and the second inverter main path operation signal as inputs, and outputs an inverter main path driving signal. The fourth AND gate takes the first bypass operation signal and the third bypass operation signal as inputs, and outputs a bypass driving signal. The or gate takes the first bypass running signal and the second bypass running signal as inputs and outputs a fourth bypass running signal; The fourth and gate takes the third bypass running signal and the fourth bypass running signal as inputs and outputs a bypass driving signal.

9. A nuclear power plant comprising independent bypass control according to any of claims 1 to 8, characterized in that, The total output voltage is the voltage after the outputs of the inverter main circuit switch and the bypass switch are connected in parallel; and the bypass voltage is the input voltage of the bypass switch.

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