Voltage stabilizer gear switching control method, device and equipment for nuclear power plant

Abstract

The embodiment of the invention discloses a voltage stabilizer gear switching control method, device and equipment for a nuclear power plant, a product and a storage medium, and is applied to a compensation type voltage stabilizer circuit. The method comprises the following steps: acquiring a voltage signal and a current signal output by the voltage stabilizer circuit; identifying type information of a load accessed to the voltage stabilizer circuit based on the voltage signal and the current signal; determining a control strategy of a voltage stabilizer in the voltage stabilizer circuit according to the type information; and performing gear switching control on the voltage stabilizer by using the control strategy.

Description

Technical Field

[0001] The present application relates to the field of electrical technology, and in particular to a voltage regulator switching control method, device, equipment, product and storage medium for a nuclear power plant. Background Art

[0002] For high-power compensation voltage stabilizers, the output voltage is used as feedback for voltage compensation, so that the output voltage is stabilized at 220±4V. When the output voltage exceeds this range, the output voltage can be raised or lowered by switching the compensation mode to achieve the purpose of voltage stabilization; however, different measures are taken for different loads. There is currently no effective solution to the problem of how to identify the load and take different switching measures for different loads. Summary of the invention

[0003] In view of this, the embodiments of the present application hope to provide a regulator switching control method, device, equipment, product and storage medium for a nuclear power plant.

[0004] The technical embodiment of the embodiment of the present application is implemented as follows:

[0005] The present application provides a voltage regulator switching control method for a nuclear power plant, which is applied to a compensated voltage regulator circuit; the method includes:

[0006] Acquiring a voltage signal and a current signal output by the voltage regulator circuit;

[0007] Identify type information of a load connected to the voltage regulator circuit based on the voltage signal and the current signal;

[0008] determining a control strategy of a voltage regulator in the voltage regulator circuit according to the type information;

[0009] The control strategy is used to control the voltage regulator to switch gears.

[0010] In the above solution, the identifying the type information of the load connected to the voltage regulator circuit based on the voltage signal and the current signal includes:

[0011] Determining a power parameter of the load according to the voltage signal and the current signal;

[0012] Determine whether the power parameter has changed, and obtain a first determination result;

[0013] Determine whether the voltage signal and / or the current signal changes, and obtain a second determination result;

[0014] The type information of the load is determined based on the first judgment result and the second judgment result.

[0015] In the above solution, the determining the type information of the load based on the first judgment result and the second judgment result includes:

[0016] When the first judgment result indicates that the power parameter has not changed, and the second judgment result indicates that both the voltage signal and the current signal have changed and the trends of the changes are opposite, determining that the type information of the load is a constant power load;

[0017] When the first judgment result indicates that the power parameter has changed, and the second judgment result indicates that both the voltage signal and the current signal have changed, determining that the type information of the load is a motor load;

[0018] When the first judgment result indicates that the power parameter changes, the second judgment result indicates that the voltage signal does not change, and the current signal changes, it is determined that the type information of the load is a constant resistance load or a nonlinear RCD load.

[0019] In the above solution, the changing trend of the current signal is increasing, and the changing trend of the voltage signal is decreasing.

[0020] In the above solution, when the voltage signal does not change but the current signal changes, the changing trend of the current signal is proportional to the changing trend of the resistance value of the load.

[0021] In the above solution, when the type information of the load is a constant power load; determining the control strategy of the voltage regulator in the voltage regulator circuit according to the type information includes:

[0022] Acquiring voltage data of the constant power load;

[0023] Performing standard deviation processing on the voltage data to obtain a processing result;

[0024] When the processing result indicates that the standard deviation of the voltage data is less than a preset threshold, it is determined that the output voltage of the voltage regulator is in a stable trend; and the control strategy is to control the voltage regulator to switch gears when the output voltage of the voltage regulator is in a stable trend.

[0025] In the above solution, when the type information of the load is a motor load; determining the control strategy of the voltage regulator in the voltage regulator circuit according to the type information includes:

[0026] Obtaining the gear position of the voltage stabilizer under the motor load;

[0027] The control strategy is determined to maintain the gear position of the voltage regulator.

[0028] In the above scheme, when the type information of the load is a constant resistance load or a nonlinear RCD load; determining the control strategy of the voltage regulator in the voltage regulator circuit according to the type information includes:

[0029] The control strategy is determined to immediately adjust the gear position of the voltage stabilizer to achieve the voltage stabilization effect.

[0030] The present application provides a voltage regulator switching control device for a nuclear power plant, which is arranged in a compensating voltage regulator circuit; the device comprises:

[0031] An acquisition unit, used for acquiring a voltage signal and a current signal output by the voltage regulator circuit;

[0032] an identification unit, configured to identify type information of a load connected to the voltage regulator circuit based on the voltage signal and the current signal;

[0033] a determining unit, configured to determine a control strategy of a voltage regulator in the voltage regulator circuit according to the type information;

[0034] A control unit is used to perform gear switching control on the voltage stabilizer using the control strategy.

[0035] The embodiment of the present application provides a voltage regulator switching control device for a nuclear power plant, including:

[0036] A memory for storing executable instructions;

[0037] The processor is used to implement any step of the above-mentioned method when executing the executable instructions stored in the memory.

[0038] An embodiment of the present application provides a computer program product, including a computer program, which implements any step of the above-mentioned method when executed by a processor.

[0039] An embodiment of the present application provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, any step of the method described above is implemented.

[0040] The embodiments of the present application provide a voltage regulator switching control method, device, equipment, product and storage medium for use in a nuclear power plant, which are applied to a compensated voltage regulator circuit; the method includes: obtaining a voltage signal and a current signal output by the voltage regulator circuit; identifying the type information of the load connected to the voltage regulator circuit based on the voltage signal and the current signal; determining the control strategy of the voltage regulator in the voltage regulator circuit according to the type information; and performing switching control on the voltage regulator using the control strategy. The technical solution of the embodiments of the present application is adopted to identify the type information of the load connected to the voltage regulator circuit through voltage signals and current signals; determining the control strategy of the voltage regulator in the voltage regulator circuit according to the type information; performing switching control on the voltage regulator using the control strategy; realizing automatic identification of the load type, and performing corresponding switching methods under different load conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a schematic diagram of a flow chart of a method for implementing a voltage regulator switching control method for a nuclear power plant according to an embodiment of the present application;

[0042] Figure 2 A schematic diagram of a specific application scenario of the compensation type voltage regulator circuit in the embodiment of the present application;

[0043] Figure 3 A schematic diagram of a constant power load identification algorithm according to an embodiment of the present application;

[0044] Figure 4 A schematic diagram of a motor load identification algorithm according to an embodiment of the present application;

[0045] Figure 5 A schematic diagram of a motor load identification algorithm according to an embodiment of the present application;

[0046] Figure 6 This is a schematic diagram of calculating voltage stability using the standard deviation method in an embodiment of the present application;

[0047] Figure 7 A schematic diagram of the voltage regulator switching control for a nuclear power plant according to an embodiment of the present application;

[0048] Figure 8 This is a schematic structural diagram of a voltage regulator switching control device for a nuclear power plant according to an embodiment of the present application;

[0049] Fig. 9 This is a schematic structural diagram of a voltage regulator switching control device for a nuclear power plant according to an embodiment of the present application. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the specific technical solution of the invention will be further described in detail below in conjunction with the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0051] The high-power compensation type voltage stabilizer uses the output voltage as feedback for voltage compensation, so that the output voltage is stable at 220±4V. When the output voltage exceeds this range, the output voltage can be raised or lowered by switching the compensation mode to achieve the purpose of voltage stabilization. During the experiment, it was found that under constant power load, if the output voltage changes after the gear is adjusted: if the output voltage increases, due to the constant power load, the output current will decrease, and the current flowing through the front-end main transformer and the compensation transformer will also decrease, so that the voltage drop of the three will decrease (the change process is slow), and finally the output voltage will become higher. During this change process, if the gear is adjusted, since the output voltage is not stable, the output voltage is used as feedback for closed-loop adjustment, which will lead to gear judgment errors and frequent gear switching. Therefore, load identification is required. Under constant power load, it is necessary to determine that the output voltage is stable before the next gear switching judgment can be made.

[0052] Under resistive load or RCD load, it is necessary to respond to the gear switching immediately and adjust the output voltage quickly to achieve the purpose of stabilizing the output voltage. Among them, RCD load is a nonlinear analog load composed of resistor (R), capacitor (C), and diode (D) as the main components.

[0053] When the load is a motor, a large current will be generated. Switching gears will result in a large reverse peak voltage being coupled across the compensation thyristor, which will cause overvoltage and overcurrent damage. Therefore, in this load case, a static voltage regulator needs to be switched.

[0054] Therefore, under different load conditions, corresponding gear switching methods are required, and the machine needs to automatically identify the load type.

[0055] Based on this, this embodiment proposes a regulator switching control method for a nuclear power plant. The method can be applied to the regulator switching control device for a nuclear power plant. The function implemented by the method can be implemented by calling the program code by the processor in the regulator switching control device for a nuclear power plant. Of course, the program code can be stored in the memory of the processing device. It can be seen that the processing device at least includes a processor and a memory.

[0056] Figure 1 1 is a schematic diagram of a flow chart of a voltage regulator switching control method for a nuclear power plant according to an embodiment of the present application, which is applied to a compensating voltage regulator circuit; Figure 1 As shown, the method includes:

[0057] Step S101: obtaining a voltage signal and a current signal output by the voltage regulator circuit.

[0058] Step S102: Identifying type information of a load connected to the voltage regulator circuit based on the voltage signal and the current signal.

[0059] Step S103: determining a control strategy of a voltage regulator in the voltage regulator circuit according to the type information.

[0060] Step S104: utilizing the control strategy to control the voltage regulator to switch gears.

[0061] It should be noted that the compensation type voltage regulator circuit can be determined according to the actual situation, and is not limited here. As an example, the compensation type voltage regulator circuit can be a high-power compensation type voltage regulator, and the output is used as the feedback amount for voltage compensation. The compensation type voltage regulator circuit can be single-phase or three-phase, and is not limited here. For the sake of ease of understanding, a single-phase compensation type voltage regulator circuit is used as an example here, which can be combined with Figure 2 To understand, Figure 2 A schematic diagram of a specific application scenario of the compensated voltage regulator circuit in an embodiment of the present application.

[0062] In step S101, the specific acquisition process of the voltage signal and the current signal output by the voltage regulator circuit can be determined according to actual conditions, and is not limited here. As an example, the voltage signal and the current signal output by the voltage regulator circuit can be obtained by sampling or measuring the voltage signal and the current signal output by the voltage regulator circuit. Among them, the voltage signal and the current signal can be determined according to actual conditions, and are not limited here. As an example, the voltage signal can be recorded as U(t); the current signal can be recorded as I(t).

[0063] In step S102, the specific identification process in the type information of the load connected to the voltage regulator circuit based on the voltage signal and the current signal can be determined according to actual conditions, and is not limited here. As an example, the type information of the load connected to the voltage regulator circuit based on the voltage signal and the current signal can include: determining the power parameter of the load according to the voltage signal and the current signal; judging whether the power parameter changes to obtain a first judgment result; judging whether the voltage signal and / or the current signal changes to obtain a second judgment result; determining the type information of the load based on the first judgment result and the second judgment result. Among them, the type information of the load connected to the voltage regulator circuit can be determined according to actual conditions, and is not limited here. As an example, the type information of the load connected to the voltage regulator circuit can include a constant power load, a motor load, a constant resistance load, or a nonlinear RCD load.

[0064] In step S103, the specific determination process in determining the control strategy of the voltage regulator in the voltage regulator circuit according to the type information can be determined according to actual conditions, and is not limited here. As an example, when the type information of the load is a motor load; the control strategy of the voltage regulator in the voltage regulator circuit according to the type information may include: obtaining the gear position of the voltage regulator under the motor load; and determining that the control strategy is to maintain the gear position of the voltage regulator. When the type information of the load is a motor load; the control strategy of the voltage regulator in the voltage regulator circuit according to the type information may include: obtaining the gear position of the voltage regulator under the motor load; and determining that the control strategy is to maintain the gear position of the voltage regulator. When the type information of the load is a constant resistance load or a nonlinear RCD load; the control strategy of the voltage regulator in the voltage regulator circuit according to the type information may include: determining that the control strategy is to immediately adjust the gear position of the voltage regulator to achieve the effect of voltage stabilization.

[0065] In step S104, the specific gear shift control process in the gear shift control of the voltage regulator using the control strategy can be determined according to actual conditions and is not limited here. As an example, the gear shift control of the voltage regulator using the control strategy can be to execute the control strategy to control the voltage regulator.

[0066] In this embodiment, the type information of the load connected to the voltage regulator circuit is identified through the voltage signal and the current signal; the control strategy of the voltage regulator in the voltage regulator circuit is determined according to the type information; the voltage regulator is switched using the control strategy; the load type is automatically identified, and the corresponding switching method is performed under different load conditions.

[0067] In an optional embodiment of the present application, the identifying type information of the load connected to the voltage regulator circuit based on the voltage signal and the current signal includes:

[0068] Determining a power parameter of the load according to the voltage signal and the current signal;

[0069] Determine whether the power parameter has changed, and obtain a first determination result;

[0070] Determine whether the voltage signal and / or the current signal changes, and obtain a second determination result;

[0071] The type information of the load is determined based on the first judgment result and the second judgment result.

[0072] In this embodiment, the voltage signal, the current signal and the power parameter of the load can be determined according to actual conditions and are not limited here. As an example, the voltage signal can be recorded as U(t); the current signal can be recorded as I(t); and the power parameter of the load can be recorded as P(t).

[0073] The specific determination process of determining the power parameter of the load according to the voltage signal and the current signal can be determined according to actual conditions and is not limited here. As an example, determining the power parameter of the load according to the voltage signal and the current signal can be understood as P(t)=U(t)I(t).

[0074] The specific judgment in the first judgment result obtained by judging whether the power parameter has changed can be determined according to actual conditions and is not limited here. As an example, the first judgment result obtained by judging whether the power parameter has changed can be the first judgment result characterizing that the power parameter has not changed or characterizing that the power parameter has changed.

[0075] The specific judgment process in determining whether the voltage signal and / or the current signal have changed and obtaining the second judgment result can be determined according to actual conditions and is not limited here. As an example, determining whether the voltage signal and / or the current signal have changed and obtaining the second judgment result can be determining whether the voltage signal and / or the current signal have changed and obtaining the second judgment result indicating that both the voltage signal and the current signal have changed or that the voltage signal or the current signal has changed.

[0076] The specific determination process in determining the type information of the load based on the first judgment result and the second judgment result can be determined according to actual conditions and is not limited here. As an example, the determination of the type information of the load based on the first judgment result and the second judgment result may include: when the first judgment result indicates that the power parameter has not changed, and the second judgment result indicates that both the voltage signal and the current signal have changed and the trends of the changes are opposite, determining that the type information of the load is a constant power load; when the first judgment result indicates that the power parameter has changed, and the second judgment result indicates that both the voltage signal and the current signal have changed, determining that the type information of the load is a motor load; when the first judgment result indicates that the power parameter has changed, and the second judgment result indicates that the voltage signal has not changed, and the current signal has changed, determining that the type information of the load is a constant resistance load or a nonlinear RCD load.

[0077] In an optional embodiment of the present application, determining the type information of the load based on the first judgment result and the second judgment result includes:

[0078] When the first judgment result indicates that the power parameter has not changed, and the second judgment result indicates that both the voltage signal and the current signal have changed and the trends of the changes are opposite, determining that the type information of the load is a constant power load;

[0079] When the first judgment result indicates that the power parameter has changed, and the second judgment result indicates that both the voltage signal and the current signal have changed, determining that the type information of the load is a motor load;

[0080] When the first judgment result indicates that the power parameter changes, the second judgment result indicates that the voltage signal does not change, and the current signal changes, it is determined that the type information of the load is a constant resistance load or a nonlinear RCD load.

[0081] In this embodiment, the first judgment result indicating that the power parameter has not changed can be understood as P(t) having almost no change or a very small change.

[0082] The second judgment result indicates that both the voltage signal and the current signal have changed and the changing trends are opposite, which can be understood as the voltage and current present opposite changing trends.

[0083] In practical applications, the voltage and current are sampled, P(t) = U(t)I(t), the instantaneous power is calculated, and the load type is determined by judging the power change trend. If P(t) has almost no change or changes very little and the voltage and current show opposite change trends, the load type can be determined to be a constant power load.

[0084] The first judgment result indicates that the power parameter has changed, which can be understood as a large change in P(t).

[0085] The second judgment result indicates that both the voltage signal and the current signal have changed, which can be understood as both the voltage signal and the current signal have changed.

[0086] In practical applications, the main consideration is that when the motor starts, it will draw a much higher current than when it is running normally, usually 6-8 times the rated current, and at this time the voltage of the voltage regulator will temporarily drop. By using this characteristic, we can judge the changes in the output voltage and current at this time to determine whether the load is a motor.

[0087] The first judgment result indicates that the power parameter has changed, which can be understood as a large change in P(t).

[0088] The second judgment result indicates that the voltage signal does not change, and the current signal changes, which can be understood as only the current signal changes.

[0089] In practical applications, other load types may include constant resistance load and RCD load. Under these two loads, when the load increases or decreases, the voltage remains unchanged, and the current will increase or decrease accordingly.

[0090] In an optional embodiment of the present application, the change trend of the current signal is increasing, and the change trend of the voltage signal is decreasing.

[0091] In this embodiment, the increasing trend of the current signal can be understood as a current surge above a preset threshold. The preset threshold can be determined according to actual conditions and is not limited here. As an example, the preset threshold can be 3. In actual applications, when the motor is started, it will draw a much higher current than in normal operation, usually 6-8 times the rated current.

[0092] The change trend of the voltage signal is a decrease, and the specific decrease process can be determined according to actual conditions, which is not limited here. As an example, the voltage of the regulator may temporarily decrease.

[0093] In actual applications, when the motor starts, it will draw a much higher current than in normal operation, usually 6-8 times the rated current, and the voltage of the voltage regulator will temporarily drop. By using this characteristic, we can determine whether the load is a motor by judging the changes in the output voltage and current at this time.

[0094] In an optional embodiment of the present application, when the voltage signal does not change but the current signal changes, the trend of the current signal change is proportional to the trend of the load resistance change.

[0095] In this embodiment, the voltage signal does not change, and the current signal changes, which can be understood as the voltage remains unchanged while the current changes.

[0096] The changing trend of the current signal is proportional to the changing trend of the resistance of the load. It can be understood that if the changing trend of the current signal increases, the changing trend of the resistance of the load increases; if the changing trend of the current signal decreases, the changing trend of the resistance of the load decreases.

[0097] In practical applications, under constant resistance load and RCD load, when the voltage stabilizer is under these two loads, the load increases or decreases, the voltage remains unchanged, and the current will increase or decrease accordingly.

[0098] In an optional embodiment of the present application, when the type information of the load is a constant power load; determining the control strategy of the voltage regulator in the voltage regulator circuit according to the type information includes:

[0099] Acquiring voltage data of the constant power load;

[0100] Performing standard deviation processing on the voltage data to obtain a processing result;

[0101] When the processing result indicates that the standard deviation of the voltage data is less than a preset threshold, it is determined that the output voltage of the voltage regulator is in a stable trend; and the control strategy is to control the voltage regulator to switch gears when the output voltage of the voltage regulator is in a stable trend.

[0102] In this embodiment, the specific acquisition process of obtaining the voltage data of the constant power load can be determined according to actual conditions and is not limited here. As an example, obtaining the voltage data of the constant power load can be understood as statistically analyzing the voltage data of the constant power load.

[0103] The performing standard deviation processing on the voltage data to obtain a processing result may be understood as performing standard deviation calculation on the voltage data to obtain a processing result.

[0104] The preset threshold value can be determined according to actual conditions and is not limited here. As an example, the preset threshold value can be 0.5.

[0105] When the processing result represents that the standard deviation of the voltage data is less than a preset threshold, it is determined that the output voltage of the regulator is in a stable trend. The specific determination process can be determined according to actual conditions and is not limited here. As an example, when the processing result represents that the standard deviation of the voltage data is less than a preset threshold, it is determined that the output voltage of the regulator is in a stable trend. It can be understood that the smaller the standard deviation, the smaller the voltage change, and the more stable the voltage.

[0106] The control strategy is to control the voltage regulator to switch gears when the output voltage of the voltage regulator is in a stable trend. This can be understood as controlling the voltage regulator to switch gears when the output voltage of the voltage regulator is in a stable trend.

[0107] In actual applications, for the regulation of constant power loads, it is necessary to wait for the output voltage to stabilize before making a gear switching judgment. In this process, it is necessary to first confirm whether it is a constant power load, and then make a voltage judgment based on the constant power load to confirm whether the voltage is stable. After determining that it is a constant power load, whether the output voltage is stable can be judged according to the following scheme:

[0108] Standard Deviation Analysis:

[0109] Whether the voltage is stable is determined by statistically analyzing the standard deviation of voltage data. The smaller the standard deviation, the smaller the voltage change and the more stable the voltage.

[0110] In an optional embodiment of the present application, when the type information of the load is a motor load; determining the control strategy of the voltage regulator in the voltage regulator circuit according to the type information includes:

[0111] Obtaining the gear position of the voltage stabilizer under the motor load;

[0112] The control strategy is determined to maintain the gear position of the voltage regulator.

[0113] In this embodiment, the step of obtaining the gear position of the voltage stabilizer under the motor load may be understood as obtaining the current gear position of the voltage stabilizer under the motor load.

[0114] Determining that the control strategy is to maintain the gear position of the voltage regulator may be understood as determining that the control strategy is to maintain the current gear position of the voltage regulator.

[0115] In practical applications, when the motor is under load, the current gear position needs to be maintained to avoid damage to the thyristor due to switching.

[0116] In an optional embodiment of the present application, when the type information of the load is a constant resistance load or a nonlinear RCD load; determining a control strategy of a voltage regulator in the voltage regulator circuit according to the type information includes:

[0117] The control strategy is determined to immediately adjust the gear position of the voltage stabilizer to achieve the voltage stabilization effect.

[0118] In this embodiment, determining that the control strategy is to immediately adjust the gear position of the voltage regulator can be understood as determining that the control strategy is to immediately adjust the gear position of the voltage regulator.

[0119] In practical applications, under constant resistance or RCD load, the voltage stabilizer immediately adjusts the gear to achieve voltage stabilization.

[0120] In order to facilitate the understanding of the present application, the voltage regulator switching control method used in a nuclear power plant is exemplified herein as a voltage regulator switching control method for self-identifying load types, which is applied to a compensating voltage regulator circuit.

[0121] The specific implementation steps are as follows:

[0122] 1. Constant power load identification and gear switching method under this working condition.

[0123] Constant power load identification scheme such as Figure 3 As shown, Figure 3 This is a schematic diagram of a constant power load identification algorithm according to an embodiment of the present application, which utilizes the characteristics of voltage and current changes and constant power under the load for identification.

[0124] Sample the voltage and current, P(t) = U(t)I(t), calculate the instantaneous power, and judge the load type by judging the power change trend. If P(t) has almost no change or changes very little and the voltage and current show opposite change trends, the load type can be judged as a constant power load.

[0125] 2. Motor load identification.

[0126] When the motor starts, it will draw much higher current than in normal operation, usually 6-8 times the rated current, and the voltage of the voltage regulator will temporarily drop. By using this characteristic, we can determine whether the load is a motor by judging the change of output voltage and current at this time. Figure 4 To understand, Figure 4 Schematic diagram of a motor load identification algorithm according to an embodiment of the present application.

[0127] 3. Identification of other load types.

[0128] For other load types, i.e. constant resistance load and RCD load, when the voltage stabilizer is under these two loads, the load increases or decreases, the voltage remains unchanged, and the current will increase or decrease accordingly. Figure 5 To understand, Figure 5 Schematic diagram of a motor load identification algorithm according to an embodiment of the present application.

[0129] 4. Overall software solution.

[0130] For the regulation of constant power load, it is necessary to wait until the output voltage is stable before making the gear switching judgment. In this process, it is necessary to first confirm whether it is a constant power load, and then make a voltage judgment based on the constant power load to confirm whether the voltage is stable. After confirming that it is a constant power load, whether the output voltage is stable can be judged according to the following scheme:

[0131] Standard Deviation Analysis:

[0132] The voltage stability is judged by statistically analyzing the standard deviation of voltage data. The smaller the standard deviation, the smaller the voltage change, and the more stable the voltage. Figure 6 To understand, Figure 6 This is a schematic diagram of calculating voltage stability using the standard deviation method in an embodiment of the present application.

[0133] The overall software solution mainly samples voltage and current and identifies the load type based on their changes. Under constant resistance or RCD load, the voltage stabilizer immediately adjusts the gear to achieve voltage stabilization. Under constant power load, the voltage stabilizer needs to wait for the output voltage to stabilize before switching gears to avoid frequent switching. Under motor load, the current gear needs to be maintained to avoid damage to the thyristor caused by switching. The specific process can be combined with Figure 7 To understand, Figure 7 A schematic diagram of the voltage regulator switching control for a nuclear power plant according to an embodiment of the present application.

[0134] The embodiment of the present application also provides a voltage regulator switching control device for a nuclear power plant, which is arranged in a compensating voltage regulator circuit; Figure 8 As shown, Figure 8 This is a schematic diagram of the structure of a voltage regulator switching control device for a nuclear power plant according to an embodiment of the present application. The early warning device 800 includes:

[0135] An acquisition unit 801 is used to acquire a voltage signal and a current signal output by the voltage regulator circuit;

[0136] An identification unit 802, configured to identify type information of a load connected to the voltage regulator circuit based on the voltage signal and the current signal;

[0137] A determining unit 803, configured to determine a control strategy of a voltage regulator in the voltage regulator circuit according to the type information;

[0138] The control unit 804 is used to perform gear switching control on the voltage regulator by using the control strategy.

[0139] In one embodiment, the identification unit 802 is further used to determine the power parameter of the load based on the voltage signal and the current signal; determine whether the power parameter has changed to obtain a first judgment result; determine whether the voltage signal and / or the current signal has changed to obtain a second judgment result; and determine the type information of the load based on the first judgment result and the second judgment result.

[0140] In one embodiment, the determination unit 804 is further used to determine that the type information of the load is a constant power load when the first judgment result indicates that the power parameter has not changed and the second judgment result indicates that both the voltage signal and the current signal have changed and the change trends are opposite; determine that the type information of the load is a motor load when the first judgment result indicates that the power parameter has changed and the second judgment result indicates that both the voltage signal and the current signal have changed; and determine that the type information of the load is a constant resistance load or a nonlinear RCD load when the first judgment result indicates that the power parameter has changed and the second judgment result indicates that the voltage signal has not changed and the current signal has changed.

[0141] In one embodiment, the change trend of the current signal is increasing, and the change trend of the voltage signal is decreasing.

[0142] In one embodiment, when the voltage signal does not change but the current signal changes, the changing trend of the current signal is proportional to the changing trend of the resistance value of the load.

[0143] In one embodiment, when the type information of the load is a constant power load; the determination unit 804 is further used to obtain voltage data of the constant power load; perform standard deviation processing on the voltage data to obtain a processing result; when the processing result indicates that the standard deviation of the voltage data is less than a preset threshold, determine that the output voltage of the voltage regulator is in a stable trend; the control strategy is to control the voltage regulator to switch gears when the output voltage of the voltage regulator is in a stable trend.

[0144] In one embodiment, when the type information of the load is a motor load, the determining unit 804 is further used to obtain the gear position of the voltage stabilizer under the motor load; and determine that the control strategy is to maintain the gear position of the voltage stabilizer.

[0145] In one embodiment, when the type information of the load is a constant resistance load or a nonlinear RCD load, the determination unit 804 is further used to determine that the control strategy is to immediately adjust the gear position of the voltage stabilizer to achieve voltage stabilization.

[0146] It should be noted that in the embodiments of the present application, if the above-mentioned voltage regulator switching control method for a nuclear power plant is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical embodiment of the embodiment of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product. The computer software product is stored in a storage medium, including a number of instructions to enable a voltage regulator switching control system for a nuclear power plant (which can be a personal computer, server, or network device, etc.) to execute all or part of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a U disk, a mobile hard disk, a read-only memory (ROM), a magnetic disk or an optical disk. In this way, the embodiments of the present application are not limited to any specific combination of hardware and software.

[0147] Based on the hardware implementation of the above-mentioned program module, an embodiment of the present application also provides a regulator switching control device for a nuclear power plant, including a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and when the processor executes the program, the steps in the regulator switching control method for a nuclear power plant provided in the above-mentioned embodiment are implemented.

[0148] Correspondingly, an embodiment of the present application provides a computer program product, which, when executed by a processor, implements the steps in the regulator switching control method for a nuclear power plant provided in the above embodiment.

[0149] Correspondingly, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the steps in the regulator switching control method for a nuclear power plant provided in the above embodiment are implemented.

[0150] It should be noted here that the description of the above storage medium and device embodiments is similar to the description of the above method embodiments, and has similar beneficial effects as the method embodiments. For technical details not disclosed in the storage medium and device embodiments of this application, please refer to the description of the method embodiments of this application for understanding.

[0151] Based on the hardware implementation of the above-mentioned program module, an embodiment of the present application also provides an information transmission device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of any one of the methods described above on the network device side are implemented; or, when the processor executes the program, the steps of any one of the methods described above on the terminal side are implemented;.

[0152] Correspondingly, an embodiment of the present application provides a computer program product, including a computer program, on which a computer program is stored, and when the computer program is executed by a processor, the steps of any one of the methods described in the above-mentioned network device side are implemented; or, when the processor executes the program, the steps of any one of the methods described in the above-mentioned terminal side are implemented.

[0153] Correspondingly, an embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of any one of the methods described in the above-mentioned network device side are implemented; or, when the processor executes the program, the steps of any one of the methods described in the above-mentioned terminal side are implemented.

[0154] It should be noted here that the description of the above storage medium and device embodiments is similar to the description of the above method embodiments, and has similar beneficial effects as the method embodiments. For technical details not disclosed in the storage medium and device embodiments of this application, please refer to the description of the method embodiments of this application for understanding.

[0155] It should be noted that Fig. 9 Schematic diagram of the structure of the voltage regulator switching control device for a nuclear power plant in the embodiment of the present application, such as Fig. 9 As shown, the control device 900 includes: a processor 901 and a memory 903 . Optionally, the control device 900 may also include a communication interface 902 .

[0156] It can be understood that the memory 903 can be a volatile memory or a non-volatile memory, and can also include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a magnetic random access memory (FRAM), a flash memory, a magnetic surface memory, an optical disc, or a compact disc read-only memory (CD-ROM); the magnetic surface memory can be a disk memory or a tape memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), synchronous static random access memory (SSRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM, SyncLink Dynamic Random Access Memory), and direct RAMbus random access memory (DRRAM, Direct Rambus Random Access Memory).The memory 903 described in the embodiments of the present application is intended to include but is not limited to these and any other suitable types of memories.

[0157] The method disclosed in the above embodiment of the present application can be applied to the processor 901, or implemented by the processor 901. The processor 901 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 901. The above processor 901 may be a general processor, a digital signal processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The processor 901 can implement or execute the methods, steps and logic block diagrams disclosed in the embodiments of the present application. The general processor can be a microprocessor or any conventional processor, etc. In combination with the steps of the method disclosed in the embodiment of the present application, it can be directly embodied as a hardware decoding processor to execute, or it can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium, which is located in the memory 903, and the processor 901 reads the information in the memory 903 and completes the steps of the above method in combination with its hardware.

[0158] In an exemplary embodiment, the device may be implemented by one or more application specific integrated circuits (ASIC), DSP, programmable logic device (PLD), complex programmable logic device (CPLD), field programmable gate array (FPGA), general processor, controller, microcontroller (MCU), microprocessor, or other electronic components to execute the aforementioned method.

[0159] It should be understood that "one embodiment" or "an embodiment" mentioned throughout the specification means that specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It should be understood that in various embodiments of the present application, the size of the sequence number of the above-mentioned processes does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. The above-mentioned sequence numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments.

[0160] It should be noted that, in this application, the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0161] The methods disclosed in several method embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments.

[0162] The features disclosed in several product embodiments provided in this application can be arbitrarily combined without conflict to obtain new product embodiments.

[0163] The features disclosed in several method or device embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments or device embodiments.

[0164] The above is only an implementation method of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for controlling the switching of a pressurizer for a nuclear power plant, characterized in that: Applicable to a compensated voltage regulator circuit; the method comprises: Acquiring a voltage signal and a current signal output by the voltage regulator circuit; Identify type information of a load connected to the voltage regulator circuit based on the voltage signal and the current signal; determining a control strategy of a voltage regulator in the voltage regulator circuit according to the type information; The control strategy is used to control the voltage regulator to switch gears.

2. The method according to claim 1, characterized in that The identifying type information of the load connected to the voltage regulator circuit based on the voltage signal and the current signal includes: Determining a power parameter of the load according to the voltage signal and the current signal; Determine whether the power parameter has changed, and obtain a first determination result; Determine whether the voltage signal and / or the current signal changes, and obtain a second determination result; The type information of the load is determined based on the first judgment result and the second judgment result.

3. The method according to claim 2, characterized in that The determining the type information of the load based on the first judgment result and the second judgment result includes: When the first judgment result indicates that the power parameter has not changed, and the second judgment result indicates that both the voltage signal and the current signal have changed and the trends of the changes are opposite, determining that the type information of the load is a constant power load; When the first judgment result indicates that the power parameter has changed, and the second judgment result indicates that both the voltage signal and the current signal have changed, determining that the type information of the load is a motor load; When the first judgment result indicates that the power parameter changes, the second judgment result indicates that the voltage signal does not change, and the current signal changes, it is determined that the type information of the load is a constant resistance load or a nonlinear RCD load.

4. The method according to claim 3, characterized in that The change trend of the current signal is increasing, and the change trend of the voltage signal is decreasing.

5. The method according to claim 3, characterized in that: When the voltage signal does not change but the current signal changes, the changing trend of the current signal is proportional to the changing trend of the resistance value of the load.

6. The method according to any one of claims 1 to 5, characterized in that: In a case where the type information of the load is a constant power load; determining a control strategy of a voltage regulator in the voltage regulator circuit according to the type information includes: Acquiring voltage data of the constant power load; Performing standard deviation processing on the voltage data to obtain a processing result; When the processing result indicates that the standard deviation of the voltage data is less than a preset threshold, it is determined that the output voltage of the voltage regulator is in a stable trend; and the control strategy is to control the voltage regulator to switch gears when the output voltage of the voltage regulator is in a stable trend.

7. The method according to any one of claims 1 to 5, characterized in that: In the case where the type information of the load is a motor load; determining the control strategy of the voltage regulator in the voltage regulator circuit according to the type information includes: Obtaining the gear position of the voltage stabilizer under the motor load; The control strategy is determined to maintain the gear position of the voltage regulator.

8. The method according to any one of claims 1 to 5, characterized in that: In a case where the type information of the load is a constant resistance load or a nonlinear RCD load; determining a control strategy of a voltage regulator in the voltage regulator circuit according to the type information includes: The control strategy is determined to immediately adjust the gear position of the voltage stabilizer to achieve the voltage stabilization effect.

9. A voltage regulator switching control device for a nuclear power plant, characterized in that: A voltage regulator circuit is provided in a compensation type; the device comprises: An acquisition unit, used for acquiring a voltage signal and a current signal output by the voltage regulator circuit; an identification unit, configured to identify type information of a load connected to the voltage regulator circuit based on the voltage signal and the current signal; a determining unit, configured to determine a control strategy of a voltage regulator in the voltage regulator circuit according to the type information; A control unit is used to perform gear switching control on the voltage stabilizer using the control strategy.

10. A voltage regulator switching control device for a nuclear power plant, characterized in that: include: A memory for storing executable instructions; The processor is used to implement the regulator switching control method for a nuclear power plant as described in any one of claims 1 to 8 when executing the executable instructions stored in the memory.

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