Synchronous power supply system and method for control rod position detector and related equipment

Abstract

The invention provides a control rod position detector synchronous power supply system and method and related equipment.The control rod position detector synchronous power supply system comprises a plurality of detector power supply cabinets and clock signal lines, each detector power supply cabinet comprises a power module and a sine wave generator set which are sequentially cascaded, and each sine wave generator set comprises a plurality of sine wave generators connected in parallel; the other branch of each sine wave generator is provided with a phase synchronization module, and the module is connected with all clock signal lines; the sine wave generator is used for receiving the phase synchronization signal and providing sine excitation voltage for the control rod position detector based on the phase synchronization signal; the phase synchronization module is used for receiving alternative clock signals in all clock signal lines, determining a phase synchronization signal in the alternative clock signals according to a preset signal determination rule and providing the phase synchronization signal to the sine wave generator; according to the embodiment of the invention, the problems of inaccurate measurement rod position and frequent jump of the measurement rod position caused by different frequencies and different phases of power supply of a plurality of rod position detectors can be solved.

Description

Technical Field

[0001] The present application relates to the field of nuclear power plant commissioning, and in particular to a control rod position detector synchronous power supply system, method and related equipment. Background Art

[0002] Control rods are used to control the reactivity of the reactor core and provide shutdown margin, which is crucial to reactor safety. The actual position of the control rod in the reactor is monitored by the rod position measurement system. The rod position detector includes a primary winding, multiple secondary windings, induction windings and auxiliary windings. The magnetic drive rod moves in multiple sets of windings. The drive rod position is calculated through the induced voltage of the winding, thereby obtaining the control rod position.

[0003] In the related technology, multiple rod position detectors are installed on the same nuclear reactor. When the excitation voltages of the primary windings of each rod position detector have different frequencies and phases, the amplitude of the induced voltage of the secondary winding of the rod position detector will fluctuate greatly, thereby affecting the stability and accuracy of the control rod position measurement. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application provides a control rod position detector synchronous power supply system, method and related equipment, which can solve the problem of inaccurate rod position measurement and frequent rod position jump caused by different frequencies and phases of power supply to multiple rod position detectors.

[0005] In a first aspect, an embodiment of the present application provides a control rod position detector synchronous power supply system, which is used to supply power to the control rod position detector, including:

[0006] A plurality of detector power supply cabinets and clock signal lines, each of the detector power supply cabinets comprises a power supply module and a sine wave generator group which are cascaded in sequence, the sine wave generator group comprises a plurality of parallel sine wave generators, each of the sine wave generators is used to provide an excitation voltage to the corresponding control rod position detector, a phase synchronization module is arranged on another branch of each of the sine wave generators, and the phase synchronization module is connected to all the clock signal lines;

[0007] The sine wave generator is used to receive the phase synchronization signal of the phase synchronization module, and provide a sinusoidal excitation voltage to the control rod position detector based on the phase synchronization signal;

[0008] The phase synchronization module is used to receive the alternative clock signals in all the clock signal lines, and determine the phase synchronization signal in the alternative clock signals according to a preset signal determination rule and provide it to the sine wave generator; wherein the alternative clock signal in each of the clock signal lines comes from the pulse signal sent by the corresponding detector power supply cabinet.

[0009] In some embodiments, the power supply module of each detector primary winding power supply cabinet includes a first power supply submodule and a second power supply submodule connected in parallel, the first power supply submodule is configured as an AC power supply submodule or a DC power supply submodule, and the second power supply submodule is configured as an AC power supply submodule or a DC power supply submodule;

[0010] The AC power supply submodule includes an AC power supply, an AC transformer and a first diode connected in sequence, the AC transformer is used to step down the voltage output by the AC power supply and output a DC voltage to the sine wave generator, the positive electrode of the first diode is electrically connected to the positive electrode of the AC power supply, and the negative electrode of the first diode is electrically connected to the negative electrode of the AC power supply;

[0011] The DC power supply submodule includes a DC power supply, a DC transformer and a second diode connected in sequence, the DC transformer is used to step down the voltage output by the DC power supply and output the DC voltage to the sine wave generator, the anode of the second diode is electrically connected to the positive electrode of the DC power supply, and the cathode of the second diode is electrically connected to the negative electrode of the DC power supply.

[0012] In some embodiments, the phase synchronization module includes a clock signal voter and a voltage-controlled oscillator connected in sequence, the signal voter is connected to each of the clock signal lines, the signal voter is used to determine a phase synchronization signal from a plurality of alternative clock signals according to the signal determination rule, and send the phase synchronization signal to the voltage-controlled oscillator so that the voltage-controlled oscillator generates a voltage signal with the same phase and frequency as the phase synchronization signal.

[0013] In some embodiments, the phase synchronization module includes a clock signal voter and a voltage-controlled oscillator connected in sequence, the signal voter is connected to each of the clock signal lines, the signal voter is used to determine a phase synchronization signal from a plurality of alternative clock signals according to the signal determination rule, and send the phase synchronization signal to the voltage-controlled oscillator so that the voltage-controlled oscillator generates a voltage signal with the same phase and frequency as the phase synchronization signal.

[0014] In some embodiments, a phase detector is further arranged between the clock signal voter and the voltage-controlled oscillator, and a feedback branch is further arranged between the phase detector and the output end of the voltage-controlled oscillator. The phase detector receives the excitation voltage and the phase synchronization signal output by the voltage-controlled oscillator through the feedback branch, and adjusts the excitation voltage according to the phase synchronization signal so that the phase and frequency of the excitation power supply are the same as the phase synchronization signal.

[0015] In a second aspect, an embodiment of the present application provides a control rod position detector synchronous power supply method, which is applied to the control rod position detector synchronous power supply system as described in the first aspect, including:

[0016] Control each detector power supply cabinet to send a corresponding pulse signal to a corresponding clock signal line as an alternative clock signal in the clock signal line;

[0017] Acquire the candidate clock signal in each of the clock signal lines through a phase synchronization module, and determine a phase synchronization signal from the plurality of candidate clock signals according to a preset signal determination rule;

[0018] Based on the phase synchronization signal, the sine wave generator is controlled to process the DC voltage output by the transformer to provide an excitation voltage with the same frequency and phase to each control rod position detector.

[0019] In some embodiments, acquiring the candidate clock signal in each of the clock signal lines through the phase synchronization module, and determining a phase synchronization signal from the plurality of candidate clock signals according to a preset signal determination rule, comprises:

[0020] Get the preset detector power supply cabinet priority sequence;

[0021] Based on the priority sequence of the detector power supply cabinet, a search is performed among the multiple candidate clock signals to determine the candidate clock signal with the highest priority as the phase synchronization signal.

[0022] In some embodiments, the controlling the sine wave generator to process the DC voltage output by the transformer based on the phase synchronization signal to provide an excitation voltage with the same frequency and phase to each control rod position detector includes:

[0023] Controlling a voltage controlled oscillator to generate a voltage signal based on the phase synchronization signal;

[0024] adjusting the voltage signal based on the phase detector and the phase synchronization signal so that the phase and frequency of the voltage signal are equal to the phase synchronization signal;

[0025] The sine wave generator is controlled based on the voltage signal to process the DC voltage output by the transformer, so as to provide an excitation voltage with the same frequency and phase to each control rod position detector.

[0026] In some embodiments, after controlling the sine wave generator to process the DC voltage output by the transformer based on the phase synchronization signal to provide an excitation voltage with the same frequency and phase to each control rod position detector, the method further includes:

[0027] Control each detector power supply cabinet to send a corresponding pulse signal to a corresponding clock signal line according to a preset transmission frequency, and update the candidate clock signal in the clock signal line;

[0028] Acquire the updated candidate clock signal in each of the clock signal lines through a phase synchronization module, and determine a phase synchronization signal from a plurality of updated candidate clock signals according to a preset signal determination rule;

[0029] Based on the phase synchronization signal, the sine wave generator is controlled to process the DC voltage output by the transformer to provide an excitation voltage with the same frequency and phase to each control rod position detector.

[0030] In a third aspect, an embodiment of the present application provides a control rod detection device, including a control rod position detector synchronous power supply system and a plurality of control rod position detectors as described in the first aspect;

[0031] A plurality of control rod position detectors are evenly arranged on the detection plane; wherein the positions in the detection plane for arranging the control rod position detectors are detector positions;

[0032] In the detection area of ​​the detection plane, the adjacent alternating magnetic field corresponding to each detector site is zero; wherein the adjacent alternating magnetic field is the alternating magnetic field synthesized at the detector site by the control rod position detectors adjacent to the detector site.

[0033] In some embodiments, the control rod position detector includes a primary winding and an auxiliary winding, the primary winding is used to generate an alternating magnetic field according to the excitation voltage provided by the sine wave generator, and a regulation loop is also included between the sine wave generator and the primary winding. The auxiliary winding is connected to the regulation loop and is used to generate a feedback current according to the alternating magnetic field and send it to the regulation loop, so that the regulation loop adjusts the power supply current of the primary winding according to the feedback current.

[0034] In some embodiments, a reverse power supply switch is provided inside the rod position detector, and the reverse power supply switch is used to control the rod position detector to perform reverse power supply so that the rod position detector generates an opposite alternating magnetic field.

[0035] In a fourth aspect, an embodiment of the present application provides an electronic device, comprising: a memory, a processor, the memory storing a computer program, and the processor implementing the control rod position detector synchronous power supply method as described in any one of the embodiments of the second aspect of the present application when executing the computer program.

[0036] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the storage medium stores a program, and the program is executed by a processor to implement a method for synchronous power supply to a control rod position detector as described in any one of the embodiments of the second aspect of the present application.

[0037] The synchronous power supply system for the control rod position detector according to the embodiment of the present application has at least the following beneficial effects:

[0038] According to the synchronous power supply system of the control rod position detector of the embodiment of the present application, it includes: multiple detector power supply cabinets and clock signal lines, each detector power supply cabinet includes a power supply module and a sine wave generator group cascaded in sequence, the sine wave generator group includes multiple parallel sine wave generators, each sine wave generator is used to provide an excitation voltage to the corresponding control rod position detector, and a phase synchronization module is arranged on another branch of each sine wave generator, and the phase synchronization module is connected to all clock signal lines; the sine wave generator is used to receive the phase synchronization signal of the phase synchronization module, and provide a sinusoidal excitation voltage to the control rod position detector based on the phase synchronization signal; the phase synchronization module is used to receive the alternative clock signals in all clock signal lines, and determine the phase synchronization signal in the alternative clock signals according to a preset signal determination rule and provide it to the sine wave generator; wherein the alternative clock signal in each clock signal line comes from the pulse signal sent by the corresponding detector power supply cabinet.

[0039] The present application sets up multiple detector power supply cabinets and clock signal lines, and each detector power supply cabinet contains a power supply module and a sine wave generator group. The sine wave generator group is composed of multiple parallel sine wave generators, each of which is responsible for providing an excitation voltage to the corresponding control rod position detector. A phase synchronization module is provided on another branch of each sine wave generator. The function of the phase synchronization module is to receive the alternative clock signals from each clock signal line, and according to the preset signal determination rule, select one of these alternative clock signals as a phase synchronization signal, and then provide it to the sine wave generator. After the sine wave generator receives the phase synchronization signal, it provides a sinusoidal excitation voltage to the control rod position detector based on this signal. Since all sine wave generators receive the same phase synchronization signal, it can ensure that the excitation voltages they provide to their corresponding control rod position detectors are of the same frequency and phase. In this way, the present solution solves the control rod position measurement error problem caused by different frequency and different phase excitation voltages in the prior art.

[0040] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0042] Figure 1 A working principle diagram of a control rod position detector provided in an embodiment of the present application;

[0043] Figure 2 A schematic diagram of a synchronous power supply system for a control rod position detector provided in an embodiment of the present application;

[0044] Figure 3 A schematic diagram of another synchronous power supply system for a control rod position detector provided in an embodiment of the present application;

[0045] Figure 4 A schematic diagram of another synchronous power supply system for a control rod position detector provided in an embodiment of the present application;

[0046] Figure 5 A schematic diagram of another synchronous power supply system for a control rod position detector provided in an embodiment of the present application;

[0047] Figure 6 A flow chart of an optional control rod position detector synchronous power supply method provided in an embodiment of the present application;

[0048] Figure 7 A flow chart of another optional control rod position detector synchronous power supply method provided in an embodiment of the present application;

[0049] Figure 8 A flow chart of another optional control rod position detector synchronous power supply method provided in an embodiment of the present application;

[0050] Fig. 9 A flow chart of another optional control rod position detector synchronous power supply method provided in an embodiment of the present application;

[0051] Fig.10 A schematic diagram of a control rod detection device provided in an embodiment of the present application;

[0052] Fig.11 A schematic diagram of another control rod detection device provided in an embodiment of the present application;

[0053] Fig.12 It is a schematic diagram of the hardware structure of the electronic device provided in the embodiment of the present application. DETAILED DESCRIPTION

[0054] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0055] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first", "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0056] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, left, right, front, back, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0057] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0058] In the description of this application, it should be noted that, unless otherwise clearly defined, the terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application in combination with the specific content of the technical solution. In addition, the identification of specific steps below does not represent a limitation on the order of steps and execution logic. The execution order and execution logic between each step should be understood and inferred with reference to the contents described in the embodiment.

[0059] Control rods are used to control the reactivity of the reactor core and provide shutdown margin, which is crucial to reactor safety. The actual position of the control rod in the reactor is monitored by the rod position indication system (RPI). The control rod assembly is connected to the drive rod, and the rod position detector of the RPI actually measures the position of the drive rod, thereby indirectly determining the position of the control rod assembly in the core.

[0060] The principle of the control rod position detector is as follows Figure 1 As shown, the magnetic driving rod moves in multiple sets of windings, and the induced voltage of the windings is processed by the RPI system to obtain a binary signal ("0" or "1") representing the position of the driving rod. The driving rod position is obtained by calculating the signal, thereby obtaining the control rod position.

[0061] According to the working principle of the rod position detector, the rod position detector includes a primary winding (primary winding), multiple secondary windings (secondary windings) and auxiliary windings. The primary winding is excited by AC power, and the magnitude of the induced voltage of the secondary winding is related to the position of the control rod drive rod in the detector. The main function of the auxiliary winding is to act as a feedback control to adjust the primary winding power supply current. The factors affecting the induced voltage of the secondary winding of the RPI rod position detector include: the quality of the excitation voltage of the primary winding of the rod position detector body, and the excitation of the primary winding of the adjacent rod position detector. It is known that multiple RPI rod position detectors are installed on the same nuclear reactor. When the excitation voltage of the primary winding of each rod position detector has different frequencies and phases, the amplitude of the induced voltage of the secondary winding of the rod position detector will fluctuate greatly, thereby affecting the stability and accuracy of the control rod position measurement.

[0062] In the prior art, the 220V AC power distribution of a nuclear power plant is often used as the upstream power supply for the detector. The power supply current is adjusted by a transformer step-down and current conditioning circuit to power the rod-position detector, or the AC power distribution or DC power distribution is converted into DC power by an AC / DC transformer. The DC power generates a sine wave through an oscillating current, and the sine wave provides AC power to the detector through a regulating circuit. However, for the transformer step-down amplitude modulation power supply scheme, since the detectors at different locations in the nuclear power plant are powered by different cabinets, the upstream power supply of these cabinets comes from different AC power distributions, and different AC power distributions cannot be connected. To achieve the same frequency and phase, the primary winding excitation power supply of each detector cannot achieve the same frequency and phase; for the DC oscillation excitation amplitude modulation power supply scheme, since the power-on time of each detector is different, and there are always differences in electrical parameters between the electronic components that constitute the oscillation circuit, the primary winding excitation power supply between the detectors cannot achieve the same frequency and phase; since the two existing technologies cannot achieve the same frequency and phase for the primary winding power supply of the detector, unstable electromagnetic interference is inevitably present between the core detectors, which causes the secondary winding induced voltage to fluctuate, and then causes unexpected jumps in the control rod measurement rod position.

[0063] Based on this, the present invention constructs a synchronous power supply system for a control rod position detector. By setting a plurality of detector power supply cabinets and clock signal lines, each detector power supply cabinet contains a power module and a sine wave generator group. The sine wave generator group is composed of a plurality of parallel sine wave generators, each of which is responsible for providing an excitation voltage to the corresponding control rod position detector. A phase synchronization module is arranged on another branch of each sine wave generator. The function of the phase synchronization module is to receive the alternative clock signals from each clock signal line, and select one of these alternative clock signals as a phase synchronization signal according to a preset signal determination rule, and then provide it to the sine wave generator. After the sine wave generator receives the phase synchronization signal, it provides a sinusoidal excitation voltage to the control rod position detector based on this signal. Since all sine wave generators receive the same phase synchronization signal, it can be ensured that the excitation voltages they provide to their corresponding control rod position detectors are of the same frequency and phase. In this way, the present scheme solves the control rod position measurement error problem caused by different frequency and different phase excitation voltages in the prior art.

[0064] See also Figure 2 , Figure 2 A schematic diagram of a synchronous power supply system for a control rod position detector provided in an embodiment of the present application includes:

[0065] A plurality of detector power supply cabinets 1000 and clock signal lines, each detector power supply cabinet 1000 includes a power supply module 1100 and a sine wave generator group 1200 which are cascaded in sequence, the sine wave generator group includes a plurality of parallel sine wave generators 1210, each sine wave generator 1210 is used to provide an excitation voltage to a corresponding control rod position detector 2000, and a phase synchronization module 1220 is arranged on another branch of each sine wave generator 1210, and the phase synchronization module 1220 is connected to all clock signal lines;

[0066] The sine wave generator 1210 is used to receive the phase synchronization signal of the phase synchronization module 1220, and provide a sinusoidal excitation voltage to the control rod position detector 2000 based on the phase synchronization signal;

[0067] The phase synchronization module 1220 is used to receive alternative clock signals in all clock signal lines, and determine the phase synchronization signal in the alternative clock signal according to a preset signal determination rule and provide it to the sine wave generator 1210; wherein the alternative clock signal in each clock signal line comes from the pulse signal sent by the corresponding detector power supply cabinet 1000.

[0068] Among them, the main function of the power module 1100 is to convert the external power supply into a voltage and current suitable for use by the sine wave generator group 1200. The sine wave generator group 1200 is composed of a plurality of parallel sine wave generators 1210, which are located after the power module 1100. The sine wave generator 1210 is a single component in the sine wave generator group 1200 and is responsible for generating a sine wave excitation voltage. These sine wave generators 1210 work in parallel, and each generator 1210 corresponds to a control rod position detector 2000. The sine wave generator 1210 receives a phase synchronization signal from the phase synchronization module 1220, and generates a sine wave excitation voltage with the same frequency and phase according to the signal to ensure that all detectors receive synchronized excitation voltages.

[0069] The phase synchronization module 1220 is located on another branch of the sine wave generator 1210, and its core function is to ensure that the excitation voltages generated by all sine wave generators 1210 have the same phase. The phase synchronization module 1220 receives the candidate clock signals from each clock signal line and selects a suitable clock signal as a phase synchronization signal according to a preset signal determination rule. This phase synchronization signal is used to guide the sine wave generator 1210 to generate the excitation voltage, thereby achieving synchronization of the excitation voltages of all control rod position detectors.

[0070] The clock signal line connects each detector power supply cabinet 1000 and transmits the pulse signal sent by each cabinet. These pulse signals represent the alternative clock signals in the clock signal line corresponding to each cabinet, which is the basis for the phase synchronization module 1220 to perform phase synchronization. The clock signal line ensures that different cabinets can share the same time reference, which is crucial for achieving synchronization of the excitation voltage in the entire system.

[0071] In conjunction with the accompanying drawings, it can be seen that each of cabinets A, B, C and D includes a power module, a sine wave generator group and a phase synchronization module, which are interconnected through a clock signal line. The phase synchronization module 1220 of each cabinet receives a clock signal from the clock signal line and selects one as a phase synchronization signal to ensure that the excitation voltage generated by its sine wave generator 1210 is synchronized with the rest of the system. In this way, no matter where the control rod position detector 2000 is located in the reactor, it can receive a stable and synchronized excitation voltage, thereby improving the accuracy and reliability of the measurement.

[0072] In some embodiments, the power supply module of each detector primary winding power supply cabinet includes a first power supply submodule and a second power supply submodule connected in parallel, the first power supply submodule is configured as an AC power supply submodule or a DC power supply submodule, and the second power supply submodule is configured as an AC power supply submodule or a DC power supply submodule.

[0073] See also Figure 3 In some embodiments, the first power supply submodule is an AC power supply submodule 1110, comprising an AC power supply 1111, an AC power supply 1112 and a first diode 1113 connected in sequence, the AC power supply 1112 is used to step down the voltage output by the AC power supply 1111 and output a DC voltage to the sine wave generator, the positive electrode of the first diode 1113 is electrically connected to the positive electrode of the AC power supply 1111, and the negative electrode of the first diode 1113 is electrically connected to the negative electrode of the AC power supply 1111;

[0074] See also Figure 3 In some embodiments, the first power supply submodule is a DC power supply submodule 1120, comprising a DC power supply 1121, a DC transformer 1122 and a second diode 1123 connected in sequence, the DC transformer 1122 is used to step down the voltage output by the DC power supply 1121 and output a DC voltage to the sine wave generator, the positive electrode of the second diode 1123 is electrically connected to the positive electrode of the DC power supply 1121, and the negative electrode of the second diode 1123 is electrically connected to the negative electrode of the DC power supply 1121.

[0075] Among them, the AC power supply submodule 1110 is composed of three main parts: an AC power supply 1111, an AC power supply 1112 and a first diode 1113. The AC power supply 1111 is responsible for receiving an external AC power supply and providing it to the AC power supply 1112. The function of the AC power supply 1112 is to step down the voltage output by the AC power supply 1111 and output the processed DC voltage to the sine wave generator. The first diode 1113 plays a protective role here, and its positive and negative poles are respectively electrically connected to the positive and negative poles of the AC power supply 1111 to ensure the unidirectional flow of current and prevent the current from reversing, thereby protecting the safety of the circuit.

[0076] The DC power supply submodule 1120 is also composed of three main parts: a DC power supply 1121, a DC transformer 1122, and a second diode 1123. The DC power supply 1121 is responsible for receiving an external DC power supply and providing it to the DC transformer 1122. The function of the DC transformer 1122 is to step down the voltage output by the DC power supply 1121 and output the processed DC voltage to the sine wave generator. The second diode 1123 also plays a protective role here, and its positive and negative poles are respectively electrically connected to the positive and negative poles of the DC power supply 1121 to ensure the unidirectional flow of current and prevent the current from reversing.

[0077] In conjunction with the accompanying drawings, it can be seen that the AC power supply submodule 1110 and the DC power supply submodule 1120 of the power supply module are connected in parallel. This configuration allows the system to continue to provide a stable DC voltage to the sine wave generator through the other module when either the AC or DC power supply module fails. The sine wave generator requires a stable DC voltage to generate a sine wave voltage for excitation control of the rod position detector.

[0078] This design not only improves the reliability of the power supply, but also protects the safety of the circuit by using diodes to prevent current reverse. This redundant power supply strategy is crucial for critical infrastructure such as nuclear power plants because it ensures that the system can continue to operate stably even in the event of partial equipment failure.

[0079] See also Figure 4 In some embodiments, the phase synchronization module 1220 includes a clock signal voter 1222 and a voltage-controlled oscillator 1221 connected in sequence, the signal voter 1222 is connected to each clock signal line, the signal voter 1222 is used to determine a phase synchronization signal from multiple alternative clock signals according to a signal determination rule, and send the phase synchronization signal to the voltage-controlled oscillator 1221, so that the voltage-controlled oscillator 1221 generates a voltage signal with the same phase and frequency as the phase synchronization signal.

[0080] Among them, the clock signal voter 1222 is responsible for receiving alternative clock signals from multiple clock signal lines. These alternative clock signals are pulse signals sent by each detector power supply cabinet, representing different clock sources. The clock signal voter 1222 compares and selects these alternative clock signals according to a preset signal determination rule to determine a most suitable phase synchronization signal. This rule can be based on the strength, stability or other parameters of the signal. The selected phase synchronization signal is then sent to the voltage controlled oscillator 1221.

[0081] The voltage controlled oscillator 1221 receives the phase synchronization signal from the clock signal voter 1222. The voltage controlled oscillator 1221 generates a voltage signal with the same phase and frequency according to the received phase synchronization signal. This voltage signal will be used as a reference signal for the sine wave generator 1210 to guide it to generate an excitation voltage.

[0082] This design ensures synchronization of the excitation voltage of the control rod position detectors even in a complex electromagnetic environment such as a nuclear power plant, thereby improving the accuracy and reliability of the control rod position measurement. This synchronous power supply system is crucial to the safe operation of a nuclear power plant, as it directly affects the accurate monitoring of the control rod position, and thus affects the control and safety of the reactor.

[0083] See also Figure 5 In some embodiments, a phase detector 1223 is further provided between the clock signal voter 1222 and the voltage controlled oscillator 1221, and a feedback branch is further provided between the phase detector 1223 and the output end of the voltage controlled oscillator 1221 to form a phase-locked loop. The phase detector 1223 receives the excitation voltage and the phase synchronization signal output by the voltage controlled oscillator through the feedback branch, and adjusts the excitation voltage according to the phase synchronization signal so that the phase and frequency of the excitation power supply are the same as the phase synchronization signal.

[0084] The clock signal voter 1222 is used as the input part of the phase-locked loop structure, and is responsible for receiving candidate clock signals from multiple clock signal lines. These signals represent different clock sources, and the clock signal voter 1222 selects the most suitable phase synchronization signal according to the preset signal determination rule, and sends this signal to the subsequent phase detector 1223.

[0085] The phase detector 1223 is located between the clock signal voter 1222 and the voltage controlled oscillator 1221. The function of the phase detector 1223 is to compare the received phase synchronization signal with the excitation voltage output by the voltage controlled oscillator 1221. The phase detector 1223 measures the phase difference between the two signals and adjusts the phase of the excitation voltage according to the phase difference to ensure that the phase and frequency of the excitation power supply are the same as the phase synchronization signal.

[0086] The voltage controlled oscillator 1221 is the output part of the phase locked loop structure, and the voltage controlled oscillator 1221 generates the excitation voltage according to the adjustment of the phase detector 1223. The output end of the voltage controlled oscillator 1221 is connected to the input end of the phase detector 1223 to form a feedback branch. This feedback branch allows the phase detector 1223 to monitor the phase and frequency of the excitation voltage in real time and make necessary adjustments.

[0087] Through this phase-locked loop structure, the system can accurately synchronize the phase and frequency of the excitation voltage, ensuring that the excitation voltages received by all control rod position detectors are completely synchronized. This precise synchronization is crucial to improving the stability and accuracy of control rod position measurement, which helps improve the safety and reliability of nuclear power plants.

[0088] See also Figure 6 A control rod position detector winding synchronous power supply method provided in an embodiment of the present invention is applied to the above control rod position detector synchronous power supply system, and may include, but not limited to, the following steps 601 to 603:

[0089] Step 601 : Control each detector power supply cabinet to send a corresponding pulse signal to a corresponding clock signal line as an alternative clock signal in the clock signal line.

[0090] Step 602: Acquire candidate clock signals in each clock signal line through a phase synchronization module, and determine a phase synchronization signal from a plurality of candidate clock signals according to a preset signal determination rule.

[0091] Step 603: Based on the phase synchronization signal, the sine wave generator is controlled to process the DC voltage output by the transformer to provide an excitation voltage with the same frequency and phase to each control rod position detector.

[0092] In step 601 of some embodiments, each detector power supply cabinet is configured to send a pulse signal to its corresponding clock signal line. These pulse signals serve as alternative clock signals on the clock signal line, providing a basis for subsequent phase synchronization. The pulse signal generated by each power supply cabinet has a specific frequency and phase, representing the clock signal of the cabinet.

[0093] In step 602 of some embodiments, a phase synchronization module is used to receive and process candidate clock signals from each clock signal line. The phase synchronization module first obtains these candidate clock signals, and then selects a most suitable phase synchronization signal from multiple candidate signals according to a preset signal determination rule. The preset rule may consider the strength, stability or other relevant parameters of the signal to ensure that the selected phase synchronization signal can maximize the synchronization of power supply. The selected phase synchronization signal will be used to guide the subsequent excitation voltage generation.

[0094] In step 603 of some embodiments, after the phase synchronization signal is determined, the sine wave generator is controlled to process the DC voltage output by the transformer to generate an excitation voltage. The sine wave generator adjusts its output according to the frequency and phase requirements of the phase synchronization signal to ensure that the excitation voltage provided to each control rod position detector has the same frequency and phase. This process is achieved by a voltage controlled oscillator inside the sine wave generator, which adjusts its output according to the phase synchronization signal to generate the required excitation voltage.

[0095] Through step 601 to step 603, the method of the present invention can ensure that multiple control rod position detectors receive synchronous excitation voltages, thereby improving the accuracy and reliability of control rod position measurement in a nuclear power plant. This synchronous power supply method is crucial to the safe operation of a nuclear power plant because it directly affects the accurate monitoring of the control rod position, and further affects the control and safety of the reactor.

[0096] See also Figure 7 In some embodiments, step 602 may include, but is not limited to, steps 701 to 702:

[0097] Step 701, obtaining a preset detector power supply cabinet priority sequence.

[0098] Step 702: Based on the priority sequence of the detector power supply cabinet, a search is performed among multiple candidate clock signals to determine a candidate clock signal with the highest priority as the phase synchronization signal.

[0099] In step 701 of some embodiments, the detector power cabinet priority sequence predefines the priority of each detector power cabinet. This priority sequence is determined based on factors such as power supply reliability, historical performance, geographic location, or other strategic considerations. For example, cabinet A may be given the highest priority because of its high reliability and proximity to key control rod position detectors. The priority sequence can be stored in the memory of the controller or hard-coded in the firmware of the controller as a constant or configuration parameter.

[0100] In step 702 of some embodiments, after obtaining the preset priority sequence, this step involves searching among multiple candidate clock signals to determine a candidate clock signal with the highest priority. This process ensures that the best clock signal can be selected, thereby improving the stability and reliability of the entire synchronous power supply.

[0101] Exemplarily, the phase synchronization module checks the alternative clock signals provided by each cabinet one by one according to the priority sequence list. If the clock signal provided by the cabinet A with the highest priority is normal, then the signal will be selected as the phase synchronization signal. If the signal of the cabinet A with the highest priority is lost or lower than the expected performance, the search will continue according to the priority sequence and select the signal provided by the cabinet with the next priority. For example, if the signal of cabinet A is lost or unstable, it will automatically switch to the signal of cabinet B. If the signal of cabinet B also does not meet the requirements, the search will continue until a signal that meets the requirements is found.

[0102] Through step 701 and step 702, the method of the present invention ensures that even when a problem occurs in some power supply cabinets or signal paths, the best candidate clock signal can be quickly and accurately selected as the phase synchronization signal. This selection mechanism not only improves the system robustness, but also ensures that the control rod position detector can continuously receive high-quality excitation voltage, thereby ensuring the stability and accuracy of the control rod position measurement of the nuclear power plant.

[0103] See also Figure 8 In some embodiments, step 603 may include, but is not limited to, steps 801 to 803:

[0104] Step 801: Control a voltage controlled oscillator to generate a voltage signal based on a phase synchronization signal.

[0105] Step 802, adjusting the voltage signal based on the phase detector and the phase synchronization signal so that the phase and frequency of the voltage signal are equal to the phase synchronization signal.

[0106] Step 803, based on the voltage signal, the sine wave generator is controlled to process the DC voltage output by the transformer, so as to provide an excitation voltage with the same frequency and phase to each control rod position detector.

[0107] In step 801 of some embodiments, a phase synchronization signal is used to control a voltage controlled oscillator (VCO) to generate an initial voltage signal. The phase synchronization signal provides the necessary frequency and phase reference to ensure that the generated voltage signal is consistent with system requirements. For example, the phase synchronization signal indicates that a voltage signal with a frequency of 1000 Hz and a phase of 0 degrees is required, and the voltage controlled oscillator will adjust its output to match these parameters.

[0108] In steps 802 to 803 of some embodiments, after the initial voltage signal is generated, the phase and frequency of the voltage signal are precisely adjusted using a phase detector to ensure that it is completely consistent with the phase synchronization signal. The phase detector (PD) is a component in a phase-locked loop that is used to compare the phases of two signals. It outputs an error signal that reflects the phase difference between the input signal and the VCO output signal. In this step, the phase detector compares the phase synchronization signal and the output signal of the VCO and generates an error voltage representing their phase difference. The specific process is: the phase detector compares the phase and frequency of the phase synchronization signal and the VCO output signal, and the error voltage generated reflects the phase difference between the two signals. The output phase difference is used to adjust the VCO to reduce the phase difference and lock to the frequency of the phase synchronization signal. After locking to the phase synchronization signal, the output signal of the VCO is used to control the sine wave generator. The sine wave generator generates an excitation voltage based on the output signal of the VCO, and the excitation voltage is used to control the DC voltage output by the transformer.

[0109] See also Fig. 9 In some embodiments, after step 603, the following steps may also be included, but not limited to, steps 901 to 903:

[0110] Step 901 : Control each detector power supply cabinet to send a corresponding pulse signal to a corresponding clock signal line according to a preset transmission frequency, and update the candidate clock signal in the clock signal line.

[0111] Step 902: Acquire the updated candidate clock signal in each clock signal line through the phase synchronization module, and determine a phase synchronization signal from a plurality of updated candidate clock signals according to a preset signal determination rule.

[0112] Step 903, based on the phase synchronization signal, the sine wave generator is controlled to process the DC voltage output by the transformer to provide an excitation voltage with the same frequency and phase to each control rod position detector.

[0113] In step 901 of some embodiments, during the long-term operation of the system, the clock source of each detector power supply cabinet may cause a slight frequency drift due to factors such as temperature and component aging. In order to prevent such drift accumulation from causing a large deviation, it is necessary to periodically update the alternative clock signal in the clock signal line. According to the preset transmission frequency, each detector power supply cabinet is controlled to send a pulse signal to its corresponding clock signal line. The pulse signal is transmitted to the phase synchronization module as the updated alternative clock signal.

[0114] In step 902 of some embodiments, the phase synchronization module receives the updated alternative clock signals transmitted by each clock signal line, and selects one of them as a new phase synchronization signal according to a preset signal determination rule. For example, the reliability of each detector power supply cabinet can be sorted in advance, and the clock signal sent by the cabinet with the highest reliability is preferentially selected. Alternatively, the alternative clock signals are voted and the majority signal is selected as the phase synchronization signal. This can minimize the impact of individual clock source anomalies. The phase synchronization module distributes the determined phase synchronization signal to each sine wave generator. The sine wave generator performs frequency conversion modulation on the DC voltage rectified by the transformer according to the phase synchronization signal to generate a new excitation voltage output. Since all sine wave generators use the same phase synchronization signal, the output excitation voltage has the same frequency and phase synchronization. The excitation voltage is supplied to the primary winding of each control rod position detector through the rod position detector power supply circuit, and the driving winding generates an alternating magnetic field. Due to the high synchronization of the excitation voltage, the magnetic field frequency phase output by each detector is consistent, thereby avoiding mutual interference and improving the accuracy and reliability of the rod position measurement.

[0115] Through steps 901 to 903, by periodically sending alternative clock signals, updating phase synchronization signals and generating new excitation voltages, this synchronous power supply method can continuously suppress the frequency drift of the clock source, and the slight frequency differences caused by the differences in the power supply circuits of each detector will not accumulate over time, thereby ensuring the consistency of the power supply output frequency and phase of the primary windings of all rod-position detectors, which is of great significance in ensuring the safe operation of nuclear power plants.

[0116] A control rod detection device provided by an embodiment of the present invention comprises the above-mentioned control rod position detector synchronous power supply system and a plurality of control rod position detectors and a detection plane;

[0117] A plurality of control rod position detectors are evenly arranged on the detection plane; wherein the positions in the detection plane for setting the control rod position detectors are detector positions;

[0118] In the detection area of ​​the detection plane, the adjacent alternating magnetic field corresponding to each detector site is zero; wherein the adjacent alternating magnetic field is the alternating magnetic field synthesized at the detector site by the control rod position detectors adjacent to the detector site.

[0119] In order to improve the accuracy of detection and reduce electromagnetic interference, the detection plane is specially designed so that the adjacent alternating magnetic field corresponding to each detector position in the detection area is zero. This means that at each detector position, the alternating magnetic fields generated by adjacent detectors can cancel each other out, thereby reducing electromagnetic interference to the current detector position.

[0120] See also Fig.10Taking the H4 position as an example, among the four detector sites closest to the H4 position, two detector sites generate an alternating magnetic field with a phase of 0°, and the other two detector sites generate an alternating magnetic field with a phase of 180°. Since the magnetic fields of 0° and 180° cancel each other out in space, at the H4 detector site, the electromagnetic interference to H4 caused by the alternating magnetic fields generated by these adjacent detector sites will be effectively offset after being synthesized. This layout design significantly reduces electromagnetic interference and improves the performance and measurement accuracy of the control rod position detector. By ensuring that the electromagnetic environment of each detector site is not interfered with by other detectors, the detection device of the present invention can more accurately monitor the position of the control rod, which is crucial to the safe operation and effective control of nuclear power plants.

[0121] In the control rod detection device of the present invention, the arrangement and layout of the control rod position detectors on the detection plane is flexible and is not limited to any specific form. Fig.10 The arrangement shown in is only an exemplary layout, which is used to illustrate how to achieve the mutual cancellation of the alternating magnetic fields of adjacent detector sites in the detection plane. The embodiments of the present invention do not limit the specific arrangement. As long as the arrangement can achieve the purpose of this solution, that is, reduce or eliminate electromagnetic interference, it can be considered as an acceptable implementation of the present invention. Fig.10 The arrangement shown in the figure can also be used to control the rod position detectors in a honeycomb arrangement. Honeycomb arrangement is a common layout method that can provide uniform coverage area and help reduce electromagnetic interference between adjacent detectors. In the honeycomb arrangement, each detector site can be designed to produce an alternating magnetic field with its nearest neighboring detector site to cancel each other, thereby minimizing electromagnetic interference on the entire detection plane.

[0122] In addition, any other arrangement that can achieve similar effects, such as linear arrangement, spiral arrangement or any other irregular arrangement, can be considered as an embodiment of the present invention as long as they can ensure that the adjacent alternating magnetic fields of each detector position cancel each other out. The key to the present invention is to achieve synchronous power supply and reduce electromagnetic interference of the control rod position detectors through a reasonable arrangement and layout, rather than being limited to a specific arrangement.

[0123] In some embodiments, a reverse power supply switch is provided inside the rod position detector, and the reverse power supply switch is used to control the rod position detector to perform reverse power supply so as to control the rod position detector to generate an opposite alternating magnetic field.

[0124] Specifically, the rod position detector usually includes a primary winding and a secondary winding. The primary winding receives the excitation voltage and generates an alternating magnetic field. When the control rod or its extension rod is inserted, the alternating magnetic field is absorbed by the magnetic conductor, causing the induced voltage of the secondary winding to change, thereby determining the position of the control rod.

[0125] Under normal circumstances, the primary winding of each rod position detector generates an alternating magnetic field with consistent frequency phase according to the excitation voltage provided by the synchronous power supply system. However, under certain special working conditions, it is necessary to locally adjust the magnetic field direction of individual rod position detectors to suppress electromagnetic interference between detectors and improve measurement accuracy. For this reason, a reverse power supply switch is set inside the rod position detector. The switch is connected to the power supply circuit of the primary winding, and the polarity of the excitation voltage can be reversed as needed, so that the primary winding generates a reverse alternating magnetic field.

[0126] For example, when the alternating magnetic fields of two adjacent rod position detectors are in opposite directions, their combined magnetic field strength in the middle of the detection area is close to zero, which has the least impact on the judgment of the control rod position. Therefore, by properly setting the reverse power supply switch of some rod position detectors, the comprehensive magnetic field distribution of the detector array can be optimized without changing the excitation voltage, and the mutual inductance interference in the local area can be reduced.

[0127] Among them, the control strategy of the reverse power supply switch can be determined according to actual needs. Usually, a preset fixed combination can be used, that is, during the installation and commissioning stage, the optimal reverse power supply combination is determined and the switch state is solidified based on electromagnetic field simulation analysis. A real-time adaptive strategy can also be used to dynamically optimize the power supply direction of each rod position detector according to the reactor operating conditions and control rod position distribution.

[0128] The reverse power supply switch set inside the rod position detector provides a flexible and controllable means for optimizing the magnetic field distribution of the detector array. It works in conjunction with the synchronous power supply system to further suppress electromagnetic interference between detectors on the basis of ensuring the consistency of the excitation voltage frequency phase, and improves the reliability and accuracy of the control rod position measurement, which is of great significance for ensuring the safe and stable operation of nuclear power plants.

[0129] See also Fig.11 In some embodiments, the control rod position detector 2000 includes a primary winding 2100 and an auxiliary winding 2200. The primary winding 2100 is used to generate an alternating magnetic field according to the excitation voltage provided by the sine wave generator 1210. A regulating loop 1230 is also included between the sine wave generator 1210 and the primary winding 2100. The auxiliary winding 2200 is connected to the regulating loop 1230 and is used to generate a feedback current according to the alternating magnetic field and send it to the regulating loop 1230, so that the regulating loop 1230 adjusts the power supply current of the primary winding 2100 according to the feedback current.

[0130] Among them, the control rod position detector usually includes a primary winding excitation coil (primary winding) and multiple secondary winding induction coils, wherein the primary winding is excited by an AC power supply to generate an alternating magnetic field. When the control rod driving rod is inserted into the detector, the magnetic permeability changes, causing the amplitude of the secondary winding induced voltage to change with the control rod position, thereby realizing the measurement of the control rod position.

[0131] The main function of setting up the auxiliary winding is to act as a feedback control to dynamically adjust the supply current of the primary winding. Specifically, the auxiliary winding senses the alternating magnetic field generated by the primary winding, and generates a feedback current in the regulation loop according to the change in the magnetic field strength. The regulation loop adjusts the supply current of the primary winding accordingly according to the magnitude of the feedback current to maintain the alternating magnetic field within the optimal measurement range, improve the linearity and sensitivity of the control rod position measurement, and the feedback mechanism composed of the auxiliary winding and the regulation loop can suppress electromagnetic interference to a certain extent, optimize the measurement performance of a single detector, and improve the system fault tolerance.

[0132] According to the synchronous power supply system of the control rod position detector of the embodiment of the present application, it includes: multiple detector power supply cabinets and clock signal lines, each detector power supply cabinet includes a power supply module and a sine wave generator group cascaded in sequence, the sine wave generator group includes multiple parallel sine wave generators, each sine wave generator is used to provide an excitation voltage to the corresponding control rod position detector, and a phase synchronization module is arranged on another branch of each sine wave generator, and the phase synchronization module is connected to all clock signal lines; the sine wave generator is used to receive the phase synchronization signal of the phase synchronization module, and provide a sinusoidal excitation voltage to the control rod position detector based on the phase synchronization signal; the phase synchronization module is used to receive the alternative clock signals in all clock signal lines, and determine the phase synchronization signal in the alternative clock signals according to a preset signal determination rule and provide it to the sine wave generator; wherein the alternative clock signal in each clock signal line comes from the pulse signal sent by the corresponding detector power supply cabinet.

[0133] The present application sets up multiple detector power supply cabinets and clock signal lines, and each detector power supply cabinet contains a power supply module and a sine wave generator group. The sine wave generator group is composed of multiple parallel sine wave generators, each of which is responsible for providing an excitation voltage to the corresponding control rod position detector. A phase synchronization module is provided on another branch of each sine wave generator. The function of the phase synchronization module is to receive the alternative clock signals from each clock signal line, and according to the preset signal determination rule, select one of these alternative clock signals as a phase synchronization signal, and then provide it to the sine wave generator. After the sine wave generator receives the phase synchronization signal, it provides a sinusoidal excitation voltage to the control rod position detector based on this signal. Since all sine wave generators receive the same phase synchronization signal, it can ensure that the excitation voltages they provide to their corresponding control rod position detectors are of the same frequency and phase. In this way, the present solution solves the control rod position measurement error problem caused by different frequency and different phase excitation voltages in the prior art.

[0134] Reference Fig.12 , Fig.12 The hardware structure of an electronic device of another embodiment is illustrated, and the electronic device includes:

[0135] The processor 1201 may be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of the present application;

[0136] The memory 1202 can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory 1202 can store an operating system and other application programs. When the technical solution provided in the embodiment of this specification is implemented by software or firmware, the relevant program code is stored in the memory 1202, and the processor 1201 calls and executes the synchronous power supply method for the control rod position detector of the embodiment of this application;

[0137] Input / output interface 1203, used to implement information input and output;

[0138] The communication interface 1204 is used to realize the communication interaction between the device and other devices. The communication can be realized through a wired manner (such as USB, network cable, etc.) or a wireless manner (such as mobile network, Wi-Fi, Bluetooth, etc.);

[0139] A bus 1205 that transmits information between various components of the device (e.g., the processor 1201, the memory 1202, the input / output interface 1203, and the communication interface 1204);

[0140] The processor 1201 , the memory 1202 , the input / output interface 1203 and the communication interface 1204 are connected to each other in communication within the device via the bus 1205 .

[0141] The embodiment of the present application also provides a computer program product, which includes a computer program. A processor of a computer device reads and executes the computer program, so that the computer device executes the above-mentioned control rod position detector synchronous power supply method.

[0142] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present disclosure described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "comprises" and "comprising" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0143] It should be understood that in the present disclosure, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one item (one) of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0144] It should be understood that in the description of the embodiments of the present application, the meaning of multiple (or multiple items) is more than two, greater than, less than, exceed, etc. are understood to not include the number, and above, below, within, etc. are understood to include the number.

[0145] In the several embodiments provided in the present disclosure, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0146] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0147] In addition, each functional unit in each embodiment of the present disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0148] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present disclosure is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the various embodiments of the present disclosure. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, referred to as ROM), random access memory (Random Access Memory, referred to as RAM), disk or optical disk and other media that can store program codes.

[0149] It should also be understood that the various implementations provided in the embodiments of the present application can be combined arbitrarily to achieve different technical effects.

[0150] The above is a specific description of the implementation methods of the present disclosure, but the present disclosure is not limited to the above implementation methods. Technical personnel familiar with the art can also make various equivalent modifications or substitutions without violating the spirit of the present disclosure. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present disclosure.

Claims

1. A synchronous power supply system for a control rod position detector, characterized in that: Used to supply power to the control rod position detector, including: a plurality of detector power supply cabinets and a clock signal line, each of the detector power supply cabinets includes a power supply module and a sine wave generator group cascaded in sequence, the sine wave generator group includes a plurality of parallel sine wave generators, each of the sine wave generators is used to provide an excitation voltage to the corresponding control rod position detector, and a phase synchronization module is provided on another branch of each of the sine wave generators, and the phase synchronization module is connected to all the clock signal lines; The sine wave generator is used to receive the phase synchronization signal of the phase synchronization module, and provide a sinusoidal excitation voltage to the control rod position detector based on the phase synchronization signal; The phase synchronization module is used to receive the alternative clock signals in all the clock signal lines, and determine the phase synchronization signal in the alternative clock signals according to a preset signal determination rule and provide it to the sine wave generator; wherein the alternative clock signal in each of the clock signal lines comes from the pulse signal sent by the corresponding detector power supply cabinet.

2. The control rod position detector synchronous power supply system according to claim 1, characterized in that: The power supply module of each detector primary winding power supply cabinet includes a first power supply submodule and a second power supply submodule connected in parallel, the first power supply submodule is configured as an AC power supply submodule or a DC power supply submodule, and the second power supply submodule is configured as an AC power supply submodule or a DC power supply submodule; The AC power supply submodule includes an AC power supply, an AC transformer and a first diode connected in sequence, the AC transformer is used to step down the voltage output by the AC power supply and output a DC voltage to the sine wave generator, the positive electrode of the first diode is electrically connected to the positive electrode of the AC power supply, and the negative electrode of the first diode is electrically connected to the negative electrode of the AC power supply; The DC power supply submodule includes a DC power supply, a DC transformer and a second diode connected in sequence, the DC transformer is used to step down the voltage output by the DC power supply and output the DC voltage to the sine wave generator, the anode of the second diode is electrically connected to the positive electrode of the DC power supply, and the cathode of the second diode is electrically connected to the negative electrode of the DC power supply.

3. The control rod position detector synchronous power supply system according to claim 1, characterized in that: The phase synchronization module includes a clock signal voter and a voltage-controlled oscillator connected in sequence, wherein the signal voter is connected to each of the clock signal lines, and the signal voter is used to determine a phase synchronization signal from a plurality of alternative clock signals according to the signal determination rule, and send the phase synchronization signal to the voltage-controlled oscillator so that the voltage-controlled oscillator generates a voltage signal with the same phase and frequency as the phase synchronization signal.

4. The control rod position detector synchronous power supply system according to claim 3 is characterized in that: A phase detector is also arranged between the clock signal voter and the voltage-controlled oscillator, and a feedback branch is also arranged between the phase detector and the output end of the voltage-controlled oscillator. The phase detector receives the excitation voltage and the phase synchronization signal output by the voltage-controlled oscillator through the feedback branch, and adjusts the excitation voltage according to the phase synchronization signal so that the phase and frequency of the excitation power supply are the same as the phase synchronization signal.

5. A control rod position detector synchronous power supply method, applied to the control rod position detector synchronous power supply system according to any one of claims 1 to 4, characterized in that: include: Control each detector power supply cabinet to send a corresponding pulse signal to a corresponding clock signal line as an alternative clock signal in the clock signal line; Acquire the candidate clock signal in each of the clock signal lines through a phase synchronization module, and determine a phase synchronization signal from the plurality of candidate clock signals according to a preset signal determination rule; Based on the phase synchronization signal, the sine wave generator is controlled to process the DC voltage output by the transformer to provide an excitation voltage with the same frequency and phase to each control rod position detector.

6. The method according to claim 5, characterized in that The method of acquiring the candidate clock signal in each of the clock signal lines through the phase synchronization module and determining a phase synchronization signal from the plurality of candidate clock signals according to a preset signal determination rule includes: Get the preset detector power supply cabinet priority sequence; Based on the priority sequence of the detector power supply cabinet, a search is performed among the multiple candidate clock signals to determine the candidate clock signal with the highest priority as the phase synchronization signal.

7. The method according to claim 5, characterized in that The controlling of the sine wave generator based on the phase synchronization signal to process the DC voltage output by the transformer to provide an excitation voltage with the same frequency and phase to each control rod position detector comprises: Controlling a voltage controlled oscillator to generate a voltage signal based on the phase synchronization signal; adjusting the voltage signal based on the phase detector and the phase synchronization signal so that the phase and frequency of the voltage signal are equal to the phase synchronization signal; The sine wave generator is controlled based on the voltage signal to process the DC voltage output by the transformer, so as to provide an excitation voltage with the same frequency and phase to each control rod position detector.

8. The method according to claim 5, characterized in that After controlling the sine wave generator to process the DC voltage output by the transformer based on the phase synchronization signal to provide an excitation voltage with the same frequency and phase to each control rod position detector, the method further includes: Control each detector power supply cabinet to send a corresponding pulse signal to a corresponding clock signal line according to a preset transmission frequency, and update the candidate clock signal in the clock signal line; Acquire the updated candidate clock signal in each of the clock signal lines through a phase synchronization module, and determine a phase synchronization signal from a plurality of updated candidate clock signals according to a preset signal determination rule; Based on the phase synchronization signal, the sine wave generator is controlled to process the DC voltage output by the transformer to provide an excitation voltage with the same frequency and phase to each control rod position detector.

9. A control rod detection device, characterized in that: It comprises a control rod position detector synchronous power supply system as claimed in any one of claims 1 to 4, a plurality of control rod position detectors and a detection plane; A plurality of control rod position detectors are evenly arranged on the detection plane; wherein the positions in the detection plane for arranging the control rod position detectors are detector positions; In the detection area of ​​the detection plane, the adjacent alternating magnetic field corresponding to each detector site is zero; wherein the adjacent alternating magnetic field is the alternating magnetic field synthesized at the detector site by the control rod position detectors adjacent to the detector site.

10. The control rod detection device according to claim 9, characterized in that: The control rod position detector includes a primary winding and an auxiliary winding. The primary winding is used to generate an alternating magnetic field according to the excitation voltage provided by the sine wave generator. A regulation loop is also included between the sine wave generator and the primary winding. The auxiliary winding is connected to the regulation loop and is used to generate a feedback current according to the alternating magnetic field and send it to the regulation loop, so that the regulation loop adjusts the power supply current of the primary winding according to the feedback current.

11. The control rod detection device according to claim 9, characterized in that: A reverse power supply switch is arranged inside the rod position detector, and the reverse power supply switch is used to control the rod position detector to perform reverse power supply, so that the rod position detector generates an opposite alternating magnetic field.

12. An electronic device, characterized in that: include: A memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the method for synchronous power supply to a control rod position detector as described in any one of claims 5 to 8 is implemented.

13. A computer-readable storage medium, characterized in that: The storage medium stores a program, and the program is executed by a processor to implement the method for synchronous power supply to a control rod position detector as described in any one of claims 5 to 8.

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