Nuclear power unit voltage stabilizer control device and voltage stabilizer

Abstract

The utility model provides a nuclear power unit voltage stabilizer control device and a voltage stabilizer. The nuclear power unit voltage stabilizer control device comprises a temperature sensor; a first input end of the first comparator is connected with the temperature sensor; the first input end of the PID controller is connected with the output end of the first comparator; the input end of the nonlinear saturation controller is connected with the output end of the PID controller; the input end of the bias arithmetic unit is connected with the output end of the nonlinear saturation controller; the input end of the first transfer function arithmetic unit is connected with the output end of the bias arithmetic unit; the input end of the first delay arithmetic unit is connected with the output end of the first transfer function arithmetic unit, and the output end of the first delay arithmetic unit is connected with the second input end of the first comparator. According to the embodiment of the utility model, the stability of heating power can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power, in particular to a voltage stabilizer control system and a voltage stabilizer. Background Art

[0002] Among the technologies for generating electricity in nuclear power plants, the construction of a steam chamber in the pressurizer of a nuclear power unit is one of the key technologies. In the related technology, a steam chamber is formed inside the pressurizer by filling the pressurizer with water and heating the water with a heating component. In the related technology, the power of the heating component mainly depends on the manual control of the operator, and the power of the heating component is unstable. If the power of the heating component is too large, the pressure inside the pressurizer may be too high, and the steam chamber construction may fail. If the power of the heating component is too small, it may take too long for the pressurizer to build the steam chamber, and it is impossible to quickly build the steam chamber.

[0003] It can be seen that the related art has the problem of poor stability of heating power of the stabilizer during the steam chamber construction process. Utility Model Content

[0004] The embodiment of the utility model provides a nuclear power unit voltage regulator control device and a voltage regulator to solve the problem of poor stability of heating power of the voltage regulator during steam chamber construction in the related art.

[0005] In order to achieve the above-mentioned purpose, the embodiment of the utility model provides a voltage stabilizer control device for a nuclear power plant, comprising:

[0006] A temperature sensor, the temperature sensor is used to monitor the temperature of the voltage regulator;

[0007] A first comparator, wherein a first input terminal of the first comparator is connected to the temperature sensor;

[0008] A proportional-integral-differential (PID) controller, wherein a first input terminal of the PID controller is connected to an output terminal of the first comparator;

[0009] A nonlinear saturation controller, wherein the input end of the nonlinear saturation controller is connected to the output end of the PID controller, and the output end of the nonlinear saturation controller is used to connect to a heating component provided in the voltage stabilizer;

[0010] A bias operator, wherein the input end of the bias operator is connected to the output end of the nonlinear saturation controller;

[0011] A first transfer function operator, wherein an input terminal of the first transfer function operator is connected to an output terminal of the bias operator;

[0012] A first delay operator, wherein the input end of the first delay operator is connected to the output end of the first transfer function operator, and the output end of the first delay operator is connected to the second input end of the first comparator.

[0013] In one embodiment, the voltage regulator control device of the nuclear power unit further comprises:

[0014] A second comparator, wherein a first input terminal of the second comparator is connected to an output terminal of the first comparator, and an output terminal of the second comparator is connected to the PID controller;

[0015] A second transfer function operator, wherein an input terminal of the second transfer function operator is connected to an output terminal of the bias operator;

[0016] A third comparator, wherein a first input terminal of the third comparator is connected to an output terminal of the second transfer function operator, and an output terminal of the third comparator is connected to a second input terminal of the second comparator;

[0017] A second delay operator, wherein the input end of the second delay operator is connected to the output end of the second transfer function operator, and the output end of the second delay operator is connected to the second input end of the third comparator.

[0018] In one embodiment, the first input terminal and the second input terminal of the second comparator are positive feedback input terminals, the first input terminal of the third comparator is a positive feedback input terminal, and the second input terminal of the third comparator is a negative feedback input terminal.

[0019] In one embodiment, the first input terminal of the first comparator is a positive feedback input terminal, and the second input terminal of the first comparator is a negative feedback input terminal.

[0020] In one embodiment, the voltage regulator control device of the nuclear power unit further comprises:

[0021] A first oscilloscope, wherein the first oscilloscope is connected to an output end of the nonlinear saturation controller, and the first oscilloscope is used to display the power of the heating component controlled by the nonlinear saturation controller to perform heating.

[0022] In one embodiment, the voltage regulator control device of the nuclear power unit further comprises:

[0023] A second oscilloscope, wherein the input end of the second oscilloscope is connected to the output end of the temperature sensor, and the second oscilloscope is used to display the real-time temperature of the voltage stabilizer.

[0024] The utility model also provides a voltage stabilizer, which is a hollow structure, and a heating component is provided inside the voltage stabilizer. The voltage stabilizer includes any one of the above-mentioned voltage stabilizer control devices for nuclear power plants.

[0025] One of the above technical solutions has the following advantages or beneficial effects:

[0026] In an embodiment of the utility model, a nuclear power unit voltage regulator control device is provided, comprising: a temperature sensor, wherein the temperature sensor is used to monitor the temperature of the voltage regulator; a first comparator, wherein the first input end of the first comparator is connected to the temperature sensor; a proportional integral differential PID controller, wherein the first input end of the PID controller is connected to the output end of the first comparator; a nonlinear saturation controller, wherein the input end of the nonlinear saturation controller is connected to the output end of the PID controller, and the output end of the nonlinear saturation controller is used to be connected to a heating component provided in the voltage regulator; a bias operator, wherein the input end of the bias operator is connected to the output end of the nonlinear saturation controller; a first transfer function operator, wherein the input end of the first transfer function operator is connected to the output end of the bias operator; and a first delay operator, wherein the input end of the first delay operator is connected to the output end of the first transfer function operator, and the output end of the first delay operator is connected to the second input end of the first comparator. In this way, the temperature of the voltage stabilizer is collected by the temperature sensor, and the first target time is determined by the bias operator, the first transfer function operator and the first delay operator, so that the PID controller can control the heating component to heat the voltage stabilizer through the nonlinear saturation controller based on the first target time, thereby realizing automated control of the steam chamber building process of the voltage stabilizer and improving the stability of the heating power of the voltage stabilizer during the steam chamber building process. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0028] Figure 1 This is one of the schematic diagrams of a voltage stabilizer control device for a nuclear power unit provided by an embodiment of the utility model;

[0029] Figure 2 It is a schematic diagram of a voltage stabilizer for a nuclear power unit provided by an embodiment of the utility model;

[0030] Figure 3 This is the second schematic diagram of the voltage stabilizer control device for a nuclear power unit provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] like Figure 1 As shown, the embodiment of the utility model provides a voltage stabilizer control device for a nuclear power unit, comprising:

[0033] A temperature sensor 10, wherein the temperature sensor 10 is used to monitor the temperature of the voltage stabilizer;

[0034] A first comparator 20, wherein a first input terminal of the first comparator 20 is connected to the temperature sensor 10;

[0035] A proportional integral derivative (PID) controller, wherein a first input terminal of the PID controller 30 is connected to an output terminal of the first comparator 20;

[0036] A nonlinear saturation controller 40, wherein the input end of the nonlinear saturation controller 40 is connected to the output end of the PID controller 30, and the output end of the nonlinear saturation controller 40 is used to connect to a heating component 90 provided in the voltage stabilizer;

[0037] A bias operator 50, wherein an input end of the bias operator 50 is connected to an output end of the nonlinear saturation controller 40;

[0038] a first transfer function operator 60, wherein an input end of the first transfer function operator 60 is connected to an output end of the bias operator 50;

[0039] A first delay operator 70 , wherein an input terminal of the first delay operator 70 is connected to an output terminal of the first transfer function operator 60 , and an output terminal of the first delay operator 70 is connected to a second input terminal of the first comparator 20 .

[0040] The above-mentioned voltage stabilizer is a voltage stabilizer in a nuclear power unit, and a heating component 90 is arranged in the voltage stabilizer. Figure 2 As shown, the pressurizer is filled with water before the steam cavity is built, and the water is heated to saturation temperature by the heating assembly 90, thereby forming a steam cavity above the level of the interior of the pressurizer.

[0041] The temperature sensor 10 is arranged inside the pressurizer, usually below the horizontal level inside the pressurizer, so that after the pressurizer is filled with water before the steam chamber is built, the water level is higher than the temperature sensor 10, and the temperature sensor 10 detects the water temperature to determine the heating effect of the heating component 90. Optionally, multiple temperature sensors 10 can be arranged, evenly distributed inside the pressurizer, and the real-time temperature inside the pressurizer is obtained by weighted calculation of the temperature measured by each temperature sensor 10.

[0042] Furthermore, during the process of building the steam chamber of the pressurizer, the temperature needs to be maintained within a set temperature range, for example, 223°C to 226°C. In this case, the temperature input of the nuclear power unit pressurizer control device is set as a step input. When the temperature sensor 10 detects that the temperature of the pressurizer is within the set temperature range, the temperature of the pressurizer is controlled by the nuclear power unit pressurizer control device. When the temperature sensor 10 detects that the temperature of the pressurizer is not within the set temperature range, the steam chamber building process of the pressurizer is not performed.

[0043] The first comparator 20 is used to receive the output of the temperature sensor 10 and the output of the first delay operator 70, and the PID controller 30 is used to perform negative feedback control based on the inside of the regulator, so that when the heating component 90 heats the regulator until the pressure reaches the preset pressure, the temperature of the regulator is also maintained at the set temperature, so as to avoid the situation where the power of the heating component 90 is too high, resulting in excessive pressure in the regulator and failure to build the steam chamber, and the power of the heating component 90 is too low, resulting in the regulator taking too long to build the steam chamber, and the steam chamber cannot be built quickly.

[0044] The nonlinear saturation controller 40 is directly connected to the heating component 90, and the nonlinear saturation controller 40 controls the heating component 90 to heat the voltage regulator within a set power range. The set power range is the heating power pre-set in the nonlinear saturation controller 40, and the set power range is within the range that the heating component 90 can achieve, for example, the set power range is 0 to 432kW. Optionally, the power regulation of the heating component 90 by the nonlinear saturation controller 40 can be achieved by constant current transformer or constant voltage transformer. For example, when the voltage remains unchanged, the heating component 90 is connected in series with an adjustable resistor, and the power of the heating component 90 is regulated by changing the resistance value of the adjustable resistor.

[0045] The above-mentioned bias operator 50 is used to correct the output power of the heating component 90. It should be noted that there is a certain loss in the heating power of the heating component 90, and part of the heat will be dissipated during the heating process. The expected temperature inside the voltage regulator cannot be directly calculated by the total heating power, and the lost heat needs to be eliminated. Among them, the bias operator 50 is used to convert the power output of the heating component 90 controlled by the nonlinear saturation controller 40 into the effective power after the output power loss, so as to improve the accuracy of the time when the nonlinear saturation controller 40 controls the output of the heating component 90.

[0046] The first transfer function operator 60 is used to calculate the transfer function of the nuclear power unit pressurizer control device, and then determine the time required for heating. The transfer function is the ratio of output to input, that is, the ratio of output temperature to input temperature, and / or the ratio of output pressure to input pressure. In the first transfer function operator 60, the first input-output ratio of pressure and / or temperature corresponding to different times in the pressurizer is calculated based on the first transfer function, and then the heating time is determined.

[0047] The first transfer function is expressed by the following formula:

[0048]

[0049] In the formula, G(s) represents the first ratio at time s, k and τ are constants, and s represents the current time.

[0050] The first delay operator 70 is used to calculate the first target time for controlling the heating pressurizer to the set pressure based on the first ratio obtained by the first transfer function operator 60. The PID controller 30 controls the heating component 90 to heat the pressurizer through the nonlinear saturation controller 40 based on the first target time, thereby realizing automatic control of the steam chamber building process of the pressurizer, improving the stability of the control process, and avoiding the situation where the power of the heating component 90 is too high, resulting in excessive pressure in the pressurizer and failure to build the steam chamber, and the power of the heating component 90 is too low, resulting in the time for the pressurizer to build the steam chamber being too long, and the steam chamber cannot be built quickly.

[0051] In an embodiment of the utility model, a nuclear power unit voltage regulator control device is provided, comprising: a temperature sensor 10, wherein the temperature sensor 10 is used to monitor the temperature of the voltage regulator; a first comparator 20, wherein the first input end of the first comparator 20 is connected to the temperature sensor 10; a proportional integral differential PID controller 30, wherein the first input end of the PID controller 30 is connected to the output end of the first comparator 20; a nonlinear saturation controller 40, wherein the input end of the nonlinear saturation controller 40 is connected to the output end of the PID controller 30, and the output end of the nonlinear saturation controller 40 is used to be connected to a heating component 90 provided in the voltage regulator; a bias operator 50, wherein the input end of the bias operator 50 is connected to the output end of the nonlinear saturation controller 40; a first transfer function operator 60, wherein the input end of the first transfer function operator 60 is connected to the output end of the bias operator 50; and a first delay operator 70, wherein the input end of the first delay operator 70 is connected to the output end of the first transfer function operator 60, and the output end of the first delay operator 70 is connected to the second input end of the first comparator 20. In this way, the temperature of the pressurizer is collected by the temperature sensor 10, and the first target time is determined by the bias operator 50, the first transfer function operator 60 and the first delay operator 70, so that the PID controller 30 can control the heating component 90 to heat the pressurizer through the nonlinear saturation controller 40 based on the first target time, thereby realizing automated control of the steam chamber building process of the pressurizer and improving the stability of the heating power of the pressurizer during the steam chamber building process.

[0052] It should be noted that Figure 1 The shown nuclear power unit pressurizer control device controls the process of building a steam chamber for the pressurizer, takes 30% of the maximum power of the heating component 90 as the loss, controls the temperature in the pressurizer to the set temperature, and controls the pressure in the pressurizer to the set pressure. The experimental results show that the total control time is 3300s. For the scenario where the steam chamber needs to be built quickly, the total control time needs to be reduced. Therefore, in one embodiment, if Figure 3 As shown, the voltage stabilizer control device of the nuclear power unit further includes:

[0053] A second comparator 21, wherein a first input terminal of the second comparator 21 is connected to an output terminal of the first comparator 20, and an output terminal of the second comparator 21 is connected to the PID controller 30;

[0054] a second transfer function operator 61, wherein an input terminal of the second transfer function operator 61 is connected to an output terminal of the bias operator 50;

[0055] A third comparator 22, wherein a first input terminal of the third comparator 22 is connected to an output terminal of the second transfer function operator, and an output terminal of the third comparator 22 is connected to a second input terminal of the second comparator 21;

[0056] The second delay operator 71 has an input terminal connected to the output terminal of the second transfer function operator 61 , and an output terminal of the second delay operator 71 connected to the second input terminal of the third comparator 22 .

[0057] The second comparator 21 is used for receiving the output of the first comparator 20 and the output of the third comparator 22 . The third comparator 22 is used for receiving the output of the second transfer function operator 61 and the second delay operator 71 .

[0058] The second transfer function operator 61 is used to calculate the transfer function of the nuclear power unit pressurizer control device, and then determine the time required for heating. The transfer function is the ratio of output to input, that is, the ratio of output temperature to input temperature, and / or the ratio of output pressure to input pressure. In the second transfer function operator 61, the second input-output ratio of pressure and / or temperature corresponding to different times in the pressurizer is calculated based on the second transfer function, and then the heating time is determined.

[0059] The second transfer function is expressed by the following formula:

[0060] W s (s) = W0(s)(1-e -τs )

[0061] W in the formula s (s) represents the second ratio at time s, W0(s) represents the initial ratio at the initial time, the initial ratio is a constant, τ is a constant, and s represents the current time. The second transfer function is different from the first transfer function. The second transfer function is used to estimate the heating time, which can effectively predict the temperature response of the regulator, thereby offsetting the influence of the time delay and reducing the control time.

[0062] The second delay operator 71 is used to calculate the second target time for controlling the heating pressurizer to the set pressure based on the second ratio obtained by the second transfer function operator 61. The PID controller 30 controls the heating component 90 to heat the pressurizer through the nonlinear saturation controller 40 based on the second target time, thereby realizing automatic control of the steam chamber building process of the pressurizer, improving the stability of the control process, and avoiding the situation where the power of the heating component 90 is too high, resulting in excessive pressure in the pressurizer and failure to build the steam chamber, and the power of the heating component 90 is too low, resulting in the time for the pressurizer to build the steam chamber being too long, and the steam chamber cannot be built quickly.

[0063] When the current temperature is within the set temperature range, the PID controller 30 controls the heater to heat the regulator through the nonlinear saturation controller 40 based on the first target time and the second target time.

[0064] Furthermore, by Figure 3 The nuclear power unit pressurizer control device shown controls the steam chamber building process of the pressurizer, takes 30% of the maximum power of the heating component 90 as the loss, controls the temperature in the pressurizer to the set temperature, and controls the pressure in the pressurizer to the set pressure. The experimental results show that the total control time is 926s, which effectively reduces the total control time.

[0065] In an embodiment of the utility model, the voltage stabilizer control device of a nuclear power unit further includes a second comparator 21, a first input end of the second comparator 21 is connected to an output end of the first comparator 20, and an output end of the second comparator 21 is connected to a PID controller 30; a second transfer function operator 61, an input end of the second transfer function operator 61 is connected to an output end of a bias operator 50; a third comparator 22, a first input end of the third comparator 22 is connected to an output end of the second transfer function operator 61, and an output end of the third comparator 22 is connected to a second input end of the second comparator 21; a second delay operator 71, an input end of the second delay operator 71 is connected to an output end of the second transfer function operator 61, and an output end of the second delay operator 71 is connected to a second input end of the third comparator 22. In this way, the nuclear power unit voltage stabilizer control device calculates the first target time through the first transfer function operator 60 and the first delay operator 70, and calculates the second target time through the second transfer function operator 61 and the second delay operator 71, so that the PID controller 30 can control the power of the heating component 90 through the nonlinear saturation controller 40 based on the first target time and the second target time, thereby effectively reducing the control time.

[0066] In one embodiment, the first input terminal and the second input terminal of the second comparator 21 are positive feedback input terminals, the first input terminal of the third comparator 22 is a positive feedback input terminal, and the second input terminal of the third comparator 22 is a negative feedback input terminal.

[0067] It should be noted that the first input end of the second comparator 21 receives the output of the first comparator 20, and the second input end receives the output of the third comparator 22. The output feedback of the first comparator 20 and the output feedback of the third comparator 22 are the same, and are both connected to the second comparator 21 as positive feedback, and are input to the PID controller 30 by the second comparator 21 to realize feedback control.

[0068] At the same time, the first input end of the third comparator 22 is connected to the output of the second transfer function operator 61, and the second input end of the third comparator 22 is connected to the output of the second delay operator 71. The larger the output of the second transfer function operator 61, the longer the PID control time, and the input end of the third comparator 22 connected to the output of the second transfer function operator 61 is a positive feedback input end; and for the output of the second delay operator 71, the longer the output second target time is, the higher the temperature rises, and negative feedback is required to maintain temperature stability, and the input end of the third comparator 22 connected to the output of the second delay operator 71 is a negative feedback input end.

[0069] In the embodiment of the utility model, the first input terminal and the second input terminal of the second comparator 21 are positive feedback input terminals, the first input terminal of the third comparator 22 is a positive feedback input terminal, and the second input terminal of the third comparator 22 is a negative feedback input terminal, so as to realize feedback control of the second transfer function operator 61 and the second delay operator 71 in the PID controller 30.

[0070] Furthermore, the first input terminal of the first comparator 20 is connected to the output of the temperature sensor 10, and the first input terminal of the first comparator 20 is a positive feedback input terminal; and the second input terminal of the first comparator 20 is connected to the output of the first delay operator 70, so the second input terminal of the first comparator 20 is a negative feedback input terminal, so as to realize feedback control of the first transfer function operator 60 and the first delay operator 70 in the PID controller 30.

[0071] In one embodiment, the voltage regulator control device of the nuclear power unit further comprises:

[0072] A first oscilloscope 80 , wherein the first oscilloscope 80 is connected to an output end of the nonlinear saturation controller 40 , and the first oscilloscope 80 is used to display the power of the heating component 90 controlled by the nonlinear saturation controller 40 to perform heating.

[0073] In an embodiment of the utility model, the first oscilloscope 80 is used to display the power of the nonlinear saturation controller 40 to control the heating component 90 for heating, so as to monitor the heating power of the heating component 90 and make timely adjustments when the heating power of the heating component 90 is abnormal.

[0074] In one embodiment, the voltage regulator control device of the nuclear power unit further comprises:

[0075] A second oscilloscope 81 , wherein the input end of the second oscilloscope 81 is connected to the output end of the temperature sensor 10 , and the second oscilloscope 81 is used to display the real-time temperature of the voltage stabilizer.

[0076] The second oscilloscope 81 is used to display the real-time temperature of the voltage stabilizer, so as to monitor the internal environment of the voltage stabilizer and make timely adjustments when there is an abnormality inside the voltage stabilizer (for example, the temperature is too high).

[0077] The embodiment of the present application also relates to a voltage stabilizer, which is a hollow structure, a heating component is provided inside the voltage stabilizer, and the voltage stabilizer includes the above-mentioned nuclear power unit voltage stabilizer control device.

[0078] It should be noted that the implementation method of the above-mentioned nuclear power unit voltage regulator control device embodiment is also applicable to the embodiment of the voltage regulator and can achieve the same technical effect, which will not be repeated here.

[0079] It should be noted that, in this article, the terms "include", "comprises" or any other variations 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 "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0080] The embodiments of the utility model are described above in conjunction with the accompanying drawings, but the utility model is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the utility model, ordinary technicians in this field can also make many forms without departing from the scope of protection of the utility model and the claims, all of which are within the protection of the utility model.

Claims

1. A voltage stabilizer control device for a nuclear power unit, characterized in that: include: A temperature sensor, the temperature sensor is used to monitor the temperature of the voltage regulator; A first comparator, wherein a first input terminal of the first comparator is connected to the temperature sensor; A proportional-integral-differential (PID) controller, wherein a first input terminal of the PID controller is connected to an output terminal of the first comparator; A nonlinear saturation controller, wherein the input end of the nonlinear saturation controller is connected to the output end of the PID controller, and the output end of the nonlinear saturation controller is used to connect to a heating component provided in the voltage stabilizer; A bias operator, wherein the input end of the bias operator is connected to the output end of the nonlinear saturation controller; A first transfer function operator, wherein an input terminal of the first transfer function operator is connected to an output terminal of the bias operator; A first delay operator, wherein the input end of the first delay operator is connected to the output end of the first transfer function operator, and the output end of the first delay operator is connected to the second input end of the first comparator.

2. The voltage stabilizer control device for a nuclear power plant according to claim 1, characterized in that: Also includes: A second comparator, wherein a first input terminal of the second comparator is connected to an output terminal of the first comparator, and an output terminal of the second comparator is connected to the PID controller; A second transfer function operator, wherein an input terminal of the second transfer function operator is connected to an output terminal of the bias operator; A third comparator, wherein a first input terminal of the third comparator is connected to an output terminal of the second transfer function operator, and an output terminal of the third comparator is connected to a second input terminal of the second comparator; A second delay operator, wherein the input end of the second delay operator is connected to the output end of the second transfer function operator, and the output end of the second delay operator is connected to the second input end of the third comparator.

3. The voltage stabilizer control device for a nuclear power plant according to claim 2, characterized in that: The first input terminal and the second input terminal of the second comparator are positive feedback input terminals, the first input terminal of the third comparator is a positive feedback input terminal, and the second input terminal of the third comparator is a negative feedback input terminal.

4. The voltage stabilizer control device for a nuclear power plant according to claim 1 or 2, characterized in that: The first input terminal of the first comparator is a positive feedback input terminal, and the second input terminal of the first comparator is a negative feedback input terminal.

5. The voltage stabilizer control device for a nuclear power plant according to claim 1 or 2, characterized in that: Also includes: A first oscilloscope, wherein the first oscilloscope is connected to an output end of the nonlinear saturation controller, and the first oscilloscope is used to display the power of the heating component controlled by the nonlinear saturation controller to perform heating.

6. The voltage stabilizer control device for a nuclear power plant according to claim 1 or 2, characterized in that: Also includes: A second oscilloscope, wherein the input end of the second oscilloscope is connected to the output end of the temperature sensor, and the second oscilloscope is used to display the real-time temperature of the voltage stabilizer.

7. A voltage stabilizer, the voltage stabilizer is a hollow structure, a heating component is provided inside the voltage stabilizer, characterized in that: The voltage stabilizer comprises the voltage stabilizer control device for a nuclear power plant unit according to any one of claims 1 to 6.

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