Nuclear power plant dcs power supply system current sharing monitoring method, power supply system and electronic equipment

Abstract

The embodiment of the application discloses a power supply system current sharing monitoring method, a power supply system and electronic equipment of a nuclear power plant DCS. The method acquires real-time current signals by setting current sensors on each power supply module, calculates the current difference between any two current signals, and then monitors the load distribution state between the modules by using the difference comparison mechanism. When the current difference reaches the first current threshold, the first alarm information for the corresponding two power supply modules is automatically generated, and the faulty power supply module is further locked, so that the small current deviation caused by module performance degradation or hidden failure can be accurately captured, the power supply imbalance risk caused by the single-point fault not being discovered in time is avoided, and the operation stability, fault response speed and overall reliability of the nuclear power plant DCS power supply system are significantly improved, thereby providing accurate decision basis for the operation and maintenance personnel.

Description

Technical Field

[0001] This application relates to the field of nuclear power instrumentation and control technology, and in particular to a current sharing monitoring method, power supply system and electronic equipment for a nuclear power plant DCS power supply system. Background Technology

[0002] The Distributed Control System (DCS) of a nuclear power plant serves as the core hub for its operation, and the reliability of its power supply system directly impacts the safe and stable operation of the unit. However, maintenance personnel typically assess the power supply status through periodic inspections or checking total current readings. This not only increases the difficulty of inspections and the risk of human error but also risks the potential for system power outages due to undetected single-point faults. Summary of the Invention

[0003] Based on this, this application provides a current sharing monitoring method, power supply system and electronic equipment for the power supply system of a nuclear power plant DCS, which can promptly detect and locate abnormal power modules in the power supply, thereby improving the operational stability, fault response speed and overall reliability of the power supply system.

[0004] In a first aspect, this application provides a current sharing monitoring method for the power supply system of a nuclear power plant DCS. The power supply system includes multiple power supply branches, each power supply branch includes multiple power modules, the input terminals of the multiple power modules are connected to form a first node, the first node is connected to a power supply, the output terminals of the multiple power modules are connected to form a second node, the second node is connected to multiple DCS loads, and each power module is equipped with a current sensor. The method includes: Acquire current signals from multiple current sensors and generate the current difference between any two current signals; If the current difference is greater than or equal to the preset first current threshold, generate the first alarm information for the two power modules corresponding to the current difference. Based on the first alarm information, the faulty power module is determined from the two power modules corresponding to the current difference, according to the current signals of the two power modules corresponding to the current difference.

[0005] Secondly, this application also provides a current sharing monitoring device for the power supply system of a nuclear power plant DCS. The power supply system includes multiple power supply branches, each power supply branch includes multiple power modules, the input terminals of the multiple power modules are connected to form a first node, the first node is connected to a power supply, the output terminals of the multiple power modules are connected to form a second node, the second node is connected to multiple DCS loads, and each power module is equipped with a current sensor. The device includes: The acquisition unit is used to acquire current signals collected by multiple current sensors and generate the current difference between any two current signals. The generation unit is used to generate the first alarm information of the two power modules corresponding to the current difference if the current difference is greater than or equal to a preset first current threshold. The determining unit is used to determine the faulty power module from the two power modules corresponding to the current difference based on the first alarm information and the current signals of the two power modules corresponding to the current difference.

[0006] Thirdly, this application also provides a power supply system for a nuclear power plant DCS, including multiple power supply branches, each power supply branch including multiple power modules, the input terminals of the multiple power modules are connected to form a first node, the first node is connected to a power supply, the output terminals of the multiple power modules are connected to form a second node, the second node is connected to multiple DCS loads, each power module is equipped with a current sensor, and the power supply system adopts the current sharing monitoring method of the nuclear power plant DCS power supply system of the first aspect for current sharing monitoring.

[0007] Fourthly, this application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, it implements the current sharing monitoring method for the power supply system of the nuclear power plant DCS provided in the first aspect above.

[0008] Fifthly, embodiments of this application also provide a computer-readable storage medium storing a computer program that, when executed by a processor, causes the processor to execute the current sharing monitoring method for the power supply system of a nuclear power plant DCS provided in the first aspect.

[0009] In a sixth aspect, embodiments of this application also provide a computer program product, including a computer program or instructions, wherein the computer program or instructions are executed by a processor to provide the current sharing monitoring method for the power supply system of a nuclear power plant DCS provided in the first aspect.

[0010] The current sharing monitoring method for the power supply system of a nuclear power plant DCS provided in this application acquires real-time current signals by setting current sensors in each power module and calculating the current difference between any two current signals. Then, a difference comparison mechanism is used to monitor the load distribution status between modules. When the current difference reaches a first current threshold, the first alarm information for the corresponding two power modules is automatically generated, and the faulty power module is further identified. This method can accurately capture minute current deviations caused by module performance degradation or latent faults, avoiding the risk of power supply imbalance caused by undetected single-point faults. It significantly improves the operational stability, fault response speed, and overall reliability of the nuclear power plant DCS power supply system, and provides accurate decision-making basis for operation and maintenance personnel. Attached Figure Description

[0011] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 A schematic block diagram of a power supply system provided in an embodiment of this application; Figure 2 A schematic block diagram of a power supply branch provided in an embodiment of this application; Figure 3 A flowchart illustrating the current sharing monitoring method for the power supply system of a nuclear power plant DCS provided in this application embodiment; Figure 4 A schematic block diagram of a current sharing monitoring device for the power supply system of a nuclear power plant DCS provided in this application embodiment; Figure 5 A schematic block diagram of an electronic device provided in an embodiment of this application. Detailed Implementation

[0013] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0014] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0015] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0016] It should also be further understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0017] Furthermore, in this application, unless otherwise explicitly specified or limited in the embodiments, the terms "installation," "connection," "joining," and "fixing" appearing in the embodiments should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral part; it can also be a mechanical connection, an electrical connection, etc. Of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication between two components, or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific implementation.

[0018] In related technologies, the power supply system of a nuclear power plant's DCS typically adopts an N+1 redundancy configuration. This means that multiple power modules are connected in parallel to form a power supply branch. The input terminals of each module are connected to the same power supply node, and the output terminals are connected to the load node to jointly bear the system load. Maintenance personnel assess the power supply status by periodically inspecting or checking the total current reading to determine whether the display modules are online and working.

[0019] However, the lack of a sophisticated mechanism for real-time acquisition and comparative analysis of the output current values ​​of each parallel power module makes it difficult to intuitively determine whether there is uneven load distribution among the modules. When a power module experiences performance degradation, a hidden fault, or a decrease in output capacity while still being in a conducting state, it is often impossible to promptly identify the current deviation between this module and other normal modules. This necessitates manual inspection or post-incident analysis, which not only increases the difficulty of inspections and the risk of human error but also leads to delayed fault location, increasing the risk of overall power supply disruption caused by a single point of failure.

[0020] To address this, this application provides a current sharing monitoring method for the power supply system of a nuclear power plant DCS. By setting a current sensor in each power module to obtain real-time current signals and calculating the current difference between any two current signals, the load distribution status between modules is monitored using a difference comparison mechanism. When the current difference reaches a first current threshold, a first alarm message is automatically generated for the corresponding two power modules, and the faulty power module is further identified. This method can accurately detect minute current deviations caused by module performance degradation or latent faults, avoiding the risk of power supply imbalance caused by undetected single-point faults. It significantly improves the operational stability, fault response speed, and overall reliability of the nuclear power plant DCS power supply system, providing accurate decision-making basis for maintenance personnel.

[0021] Please see Figure 1 and Figure 2 , Figure 1 A schematic block diagram of a power supply system provided in an embodiment of this application; Figure 2 This is a schematic block diagram of a power supply branch provided in an embodiment of this application. Figure 1 and Figure 2 As shown, the power supply system 100 includes multiple power supply branches 200, each power supply branch 200 includes multiple power modules, the input terminals of the multiple power modules are connected to form a first node, the first node is connected to the power supply, the output terminals of the multiple power modules are connected to form a second node, the second node is connected to multiple DCS loads, and each power module is equipped with a current sensor CT.

[0022] Meanwhile, the power module also includes a second switch K2, an AC / DC converter, a diode D1, and a third switch K3. One end of the second switch K2 is connected to the power supply via a filter module (Filter) and the first switch K1. A node is formed between the filter module (Filter) and the first switch K1. This node is connected to one end of a surge protector (SPD) via a fuse (FU). The other end of the surge protector (SPD) is grounded. The AC side of the AC / DC converter is connected to the second switch K2, and the DC side of the AC / DC converter is connected to the positive terminal of the diode D1. The negative terminal of the diode D1 is connected through a current sensor (CT) to one end of the third switch K3. The other end of the third switch K3 is connected to the DCS load via a fourth switch K4. The DCS load can be one or more of the following: a PCS (Power Conversion System) cabinet, an IO (Input / Output) cabinet, or a grid gateway cabinet.

[0023] Furthermore, the current sharing monitoring method for the power supply system of a nuclear power plant DCS provided in this application embodiment can be applied to the terminal equipment where the digital instrumentation and control system of a nuclear power plant is located. This method is executed by the DCS system installed in the terminal equipment. The terminal equipment can be a desktop computer, laptop computer, tablet computer, or mobile phone, etc.

[0024] It should be noted that the application scenarios described in the following embodiments of this application are for the purpose of more clearly illustrating the technical solutions of the embodiments of this application, and do not constitute a limitation on the technical solutions provided by the embodiments of this application. As those skilled in the art will know, with the emergence of new application scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.

[0025] The following is a detailed description of the current sharing monitoring method for the power supply system of the nuclear power plant DCS provided in this application.

[0026] like Figure 3 As shown, the method includes the following steps S310 to S330.

[0027] S310. Acquire current signals collected by multiple current sensors and generate the current difference between any two current signals; S320. If the current difference is greater than or equal to the preset first current threshold, generate the first alarm information of the two power modules corresponding to the current difference. S330. Based on the first alarm information, determine the faulty power module from the two power modules corresponding to the current difference according to the current signals of the two power modules corresponding to the current difference.

[0028] In this embodiment, the current signal can be understood as the output current data collected in real time by the current sensor on each power module. The current sensor can be a current transformer, which converts the analog current signal into a digital signal for transmission to the DCS system.

[0029] The current difference can be understood as the value obtained by subtracting the current signals of any two parallel power modules selected by the data processing unit in the DCS system. The current difference can reflect the degree of load distribution balance between the two power modules in the power supply branch.

[0030] The first current threshold can be understood as a judgment limit preset based on the rated output current of the power module and the allowable current sharing accuracy. The first current threshold can be set according to the characteristics of different models of power modules, for example, it can be set to 5% of the rated current or a fixed value of 3A.

[0031] The first alarm message can be understood as an automatic warning signal triggered by the DCS system when the detected current difference exceeds the allowable range. The warning signal may include the identifiers of the two power modules that triggered the alarm, the current current difference, and the timestamp of the alarm occurrence. The first alarm message alerts maintenance personnel to the potential for system imbalance and requires intervention.

[0032] Furthermore, after generating the first alarm information, the faulty power module can be determined from the two power modules corresponding to the current difference based on the current signals of the two power modules corresponding to the current difference.

[0033] Specifically, this application can compare the absolute values ​​and trends of the current of two power modules to identify the faulty power module. Typically, a faulty power module will exhibit a significantly lower output current than a normal power module, or its current will fail to rise with increasing load. This significantly improves the accuracy of fault detection, reduces the difficulty and workload for maintenance personnel, and enhances the overall reliability and safety of the DCS power supply system.

[0034] In addition, this application can also combine historical current curves. If the current of a power module shows a continuous downward trend until it approaches zero, its fault status can also be confirmed.

[0035] In this application, by setting a current sensor in each power module and acquiring signals in real time, combined with a calculation mechanism to generate current difference, it is possible to sensitively capture minute current sharing deviations. At the same time, by using a first current threshold for automatic comparison and generating a first alarm message, it is possible to realize immediate early warning of abnormal conditions. Furthermore, by deeply analyzing the current signal characteristics of the corresponding module, it is possible to accurately locate the faulty power module. This not only solves the problems of not being able to monitor current sharing in real time and the difficulty in quickly locating faulty modules, but also reduces the risk of human error through automated diagnostic processes, ensuring the high reliability and long-term stable operation of the DCS power supply of nuclear power units.

[0036] In some embodiments, after acquiring current signals collected by multiple current sensors, the method further includes: determining whether the current signal is greater than or equal to a preset second current threshold; if the current signal is greater than or equal to the second current threshold, generating second alarm information for the power supply module corresponding to the current signal.

[0037] In this embodiment, the second current threshold can be understood as a critical value used to determine whether the output current of a single power module is in an overload or abnormally high load state. The second current threshold can be preset based on the rated output current of the power module, its safety margin, and the load characteristics of the nuclear power plant's DCS system. This allows for independent evaluation of the individual operating state of each power module, preventing abnormal increases in output current due to internal faults in a single module.

[0038] The second alarm information can be understood as warning data generated for a specific power module that triggers an overcurrent condition. The second alarm information may include the unique identifier of the power module, the current real-time current value, the trigger time, and the alarm type (such as single-unit overload).

[0039] In this application, by setting a second current threshold judgment logic and coordinating it with the first current difference alarm logic, comprehensive health monitoring of the power supply system is achieved. This not only solves the problem of circulating current or efficiency reduction caused by uneven load between power modules, but also effectively fills the detection blind spot when a single power module is overloaded but does not cause a significant current sharing deviation. Therefore, when any power module malfunctions, whether it is due to a current surge caused by an individual fault or uneven current distribution caused by mismatch between power modules, corresponding alarm information can be generated in a timely manner to guide maintenance personnel to make precise adjustments or replacements, thereby minimizing human error and ensuring the continuity and stability of power supply to the nuclear power plant's DCS system.

[0040] In some embodiments, the power module further includes an AC / DC converter, one end of which is connected to the input terminal of the power module, and the other end of which is connected to the output terminal of the power module through a current sensor; before determining whether the current signal is greater than or equal to a preset second current threshold, the method further includes: acquiring parameter information of the AC / DC converter; and determining the second current threshold based on the parameter information.

[0041] In this embodiment, parameter information can be understood as key data characterizing the operating characteristics and hardware specifications of the AC / DC converter. Parameter information may include the AC / DC converter's rated power, rated input voltage, rated output voltage, maximum conversion efficiency, temperature coefficient, and current operating mode, etc.

[0042] Specifically, in the process of obtaining parameter information, this application can obtain parameter information by reading the device configuration table pre-stored in the electronic device memory or by acquiring it in real time from the control unit of the AC / DC converter via the communication bus. This can provide accurate reference data for the subsequent dynamic determination of the second current threshold, ensuring that the threshold setting matches the actual hardware capabilities of the current power module, thereby avoiding monitoring deviations caused by using uniform fixed parameters.

[0043] Furthermore, in the process of determining the second current threshold based on parameter information, this application can generate a current alarm upper limit value that adapts to the current AC / DC converter state through table lookup logic, so as to realize the adaptive adjustment of the alarm criterion. This ensures that the second current threshold can dynamically change with the actual operating capacity and environmental conditions of the AC / DC converter, effectively solving the problem that a fixed threshold cannot adapt to the characteristics of AC / DC converters under different specifications or operating conditions, and significantly reducing the false alarm rate and missed alarm rate.

[0044] As an example, this application can multiply the rated current of the AC / DC converter by a preset safety factor (such as 1.1 times) and then make corrections based on the current temperature coefficient.

[0045] As another example, this application can also pre-establish a mapping table between parameter information and threshold, and directly obtain the corresponding threshold based on the parameter index.

[0046] In this application, obtaining the parameter information of the AC / DC converter provides a real-time and accurate input variable for determining the second current threshold. Determining the second current threshold based on the parameter information transforms the static hardware specifications into a dynamic monitoring benchmark. This enables the power supply system to maintain a keen awareness of the overcurrent status of the power modules under different load capacities, aging levels, or ambient temperatures. This not only avoids the problem of frequent false alarms from low-power modules or protection lag in high-power modules caused by uniformly setting thresholds, but also further improves the overall reliability of the DCS power supply system under the N+1 redundancy architecture, providing maintenance personnel with a more accurate basis for fault early warning.

[0047] In some embodiments, the current sharing monitoring method for the power supply system of a nuclear power plant DCS further includes: determining the display area of ​​the current signal corresponding to the power module based on parameter information; and visually displaying the current signal corresponding to the power module in real time at the display area.

[0048] In this embodiment, the display area can be understood as a graphical window or pixel coordinate range specifically used to display the operating data of a specific power module on the host computer human-machine interface or operator station screen. The display area can be determined by parsing the physical location identifier and logical topology relationship in the parameter information.

[0049] Specifically, in determining the display area of ​​the current signal corresponding to the power module, this application can read the parameter information of the AC-DC converter, extract its power supply branch number and module serial number, and map them to the preset layout grid of the monitoring screen, thereby defining a unique display area. This ensures that the data display position on the monitoring interface is consistent with the actual physical distribution of the hardware, making it easier for maintenance personnel to quickly locate the data and significantly improving the rationality and maintainability of the information organization of the monitoring interface.

[0050] Furthermore, during the real-time visualization of the current signal corresponding to the power module in the display area, this application can display the instantaneous value of the current within the designated display area and change the background color or progress bar length according to the current magnitude. For example, green is displayed when the current value is within the normal range, and yellow is displayed when it is close to the threshold, so as to transform the abstract current data into intuitive visual information. This allows maintenance personnel to grasp the current sharing status of the system without consulting reports, effectively avoiding the delay in fault detection caused by data lag, and improving inspection efficiency and human factors engineering experience.

[0051] In this application, by automatically planning the display area using parameter information, the arrangement order of the power module data in the monitoring screen is ensured to strictly correspond to the actual power supply branches and cabinet positions, eliminating the risk of misalignment that may occur due to manual configuration. Combined with real-time collected current signals for dynamic refreshing, this allows maintenance personnel to intuitively compare the load status of different power modules under a unified view. This not only solves the problem of the lack of intuitiveness and operability in the display of current data in the DCS power supply system, but also significantly reduces the cognitive load of maintenance personnel during fault diagnosis, enabling them to quickly identify power modules with abnormal current deviations, thereby improving the monitoring reliability and maintenance convenience of the entire nuclear power plant DCS power supply system.

[0052] In some embodiments, after acquiring current signals collected by multiple current sensors, the method further includes: setting a vernier value corresponding to each current signal, associating the current signal with the vernier value corresponding to the current signal to obtain association information; and storing the current signal based on the association information.

[0053] In this embodiment, the cursor value can be understood as a feature value used to uniquely identify and index current data at a specific time or in a specific sequence. The cursor value can establish an ordered time series or logical sequence index for unordered or massive current sampling data. The cursor value can be obtained through a timestamp generated by the system's internal clock or an auto-incrementing sequence number generated based on the data acquisition order.

[0054] Specifically, in setting the cursor value corresponding to each current signal, this application can maintain a global counter. Each time data is collected, the counter is incremented by one, and the current count value is used as the cursor value.

[0055] Furthermore, this application associates the current signal with the vernier value, thereby encapsulating the original analog or digital current signal into a data packet with metadata (i.e., the vernier value), so that the originally isolated current value has a traceable timing attribute.

[0056] Meanwhile, during the storage of current signals based on associated information, this application allows data packets containing cursor values ​​and corresponding current signals to be written to a database, log file, or dedicated storage array. Specifically, during storage, the cursor value can be used as the primary key or index field for the write operation, ensuring that the data is neatly arranged according to time sequence or collection order. This effectively avoids data loss or confusion, ensuring that when fault review or long-term trend analysis is needed, the power supply system's operating status at any historical moment can be quickly and accurately reconstructed based on the cursor value.

[0057] In some embodiments, if the current difference is greater than or equal to a preset first current threshold, generating a first alarm message for the two power modules corresponding to the current difference includes: performing absolute value processing on the current difference to obtain an absolute current deviation value corresponding to the current difference; and generating a first alarm message if the absolute current deviation value is greater than or equal to the first current threshold.

[0058] In this embodiment, the absolute current deviation value can be understood as the magnitude of the current difference after eliminating the influence of directionality. The absolute current deviation value can be obtained by performing an absolute value operation on the original current difference between the two power modules. The original current difference may be positive or negative, depending on the acquisition order or magnitude relationship of the current signals of the two power modules being compared.

[0059] Specifically, this application eliminates sign differences caused by different calculation orders by processing the absolute value of the current difference, ensuring that subsequent alarm logic only focuses on the magnitude of the deviation, improving the standardization of data processing, and avoiding missed alarms due to sign issues. This significantly improves the sensitivity and consistency of fault detection, ensuring that as long as the magnitude exceeds the limit, it can be captured in time regardless of the direction of the current deviation. This effectively avoids monitoring blind spots caused by positive and negative cancellation or misjudgment of direction, providing a reliable basis for maintenance personnel to quickly locate faulty modules.

[0060] In some embodiments, the current sharing monitoring method for the power supply system of a nuclear power plant DCS further includes: responding to a fault query request from a power module, obtaining the fault time, fault type, identification information, and status information of the power module; and visually displaying the fault time, fault type, identification information, and status information based on preset rules.

[0061] In this embodiment, a fault query request can be understood as an instruction issued by maintenance personnel through the human-machine interface of the DCS system host computer to retrieve historical fault records of specific or all power modules.

[0062] The fault time can be understood as the specific moment when the power module triggers an alarm or is determined to be in a fault state, accurate to the second. The fault time can be obtained by synchronizing the system's internal clock with the time when the current sensor data becomes abnormal.

[0063] Fault types can be understood as the nature of faults classified according to current deviation characteristics or hardware self-test results, including but not limited to current sharing failure, overcurrent protection, communication interruption, or no output. Fault types can be mapped according to a preset fault code table.

[0064] The identification information can be a unique number or name that distinguishes each power module in the power supply system, and it corresponds one-to-one with the physical topology of the power supply system.

[0065] Status information can be understood as a snapshot of the power module's operating parameters at the moment of the fault and during its duration, including current values, voltage values, and switching status before and after the fault.

[0066] Preset rules can be understood as predefined logical strategies for organizing, sorting, and rendering fault data, including the order of data fields, color coding standards, and display formats.

[0067] Specifically, when maintenance personnel click the fault query button or enter a specific module number on the monitoring terminal, they can retrieve matching data fields from the structured fault log database maintained by the system. The obtained text and numerical data are then converted into intuitively readable tables, lists, or trend charts on the graphical user interface, arranged in reverse chronological order of fault time to prioritize the display of the most recently occurring faults. Alternatively, when the fault type is severe, the corresponding row is highlighted in red on the interface, while warning faults are displayed in yellow. This allows maintenance personnel to directly grasp the time distribution pattern of faults, the location of high-frequency fault modules, and the specific fault modes on the screen without consulting the original log files. This significantly improves the efficiency of fault diagnosis, reduces human error caused by information dispersion, and provides intuitive data support for formulating power module replacement or adjustment plans.

[0068] In the current sharing monitoring method for the power supply system of a nuclear power plant DCS provided in this application embodiment, a current sensor is set in each power module to obtain real-time current signals, and the current difference between any two current signals is calculated. Then, the load distribution status between modules is monitored by using a difference comparison mechanism. When the current difference reaches a first current threshold, a first alarm message is automatically generated for the corresponding two power modules, and the faulty power module is further identified. This allows for the accurate detection of minute current deviations caused by module performance degradation or latent faults, avoiding the risk of power supply imbalance caused by the failure to detect single-point faults in time. This significantly improves the operational stability, fault response speed, and overall reliability of the power supply system of the nuclear power plant DCS, providing accurate decision-making basis for operation and maintenance personnel.

[0069] In some embodiments, this application also provides a current sharing monitoring device 400 for the power supply system of a nuclear power plant DCS, which is used to execute any embodiment of the aforementioned current sharing monitoring method for the power supply system of a nuclear power plant DCS.

[0070] For details, please refer to Figure 4 , Figure 4 This is a schematic block diagram of the current sharing monitoring device 400 for the power supply system of a nuclear power plant DCS provided in this application embodiment.

[0071] like Figure 4As shown, the power supply system current sharing monitoring device 400 of the nuclear power plant DCS provided in this application includes: an acquisition unit 410, a generation unit 420 and a determination unit 430.

[0072] The acquisition unit 410 is used to acquire current signals collected by multiple current sensors and generate a current difference between any two current signals; the generation unit 420 is used to generate first alarm information for two power modules corresponding to the current difference if the current difference is greater than or equal to a preset first current threshold; the determination unit 430 is used to determine the faulty power module from the two power modules corresponding to the current difference based on the first alarm information and the current signals of the two power modules corresponding to the current difference.

[0073] The current sharing monitoring device 400 for the power supply system of the nuclear power plant DCS provided in this application embodiment can acquire real-time current signals by setting current sensors in each power module and calculating the current difference between any two current signals. Then, it uses a difference comparison mechanism to monitor the load distribution status between modules. When the current difference reaches a first current threshold, it automatically generates a first alarm message for the corresponding two power modules and further locks the faulty power module. This can accurately capture small current deviations caused by module performance degradation or latent faults, avoid the risk of power supply imbalance caused by the failure to detect single-point faults in time, significantly improve the operational stability, fault response speed and overall reliability of the power supply system of the nuclear power plant DCS, and provide accurate decision-making basis for operation and maintenance personnel.

[0074] It should be noted that those skilled in the art can clearly understand that the specific implementation process of the current sharing monitoring device and each unit of the power supply system of the above-mentioned nuclear power plant DCS can be referred to the corresponding description in the foregoing method embodiments. For the sake of convenience and brevity, it will not be repeated here.

[0075] In some embodiments, such as Figure 1 and Figure 2 As shown, this application also provides a power supply system 100 for a nuclear power plant DCS, including multiple power supply branches 200. Each power supply branch includes multiple power modules. The input terminals of the multiple power modules are connected to form a first node, which is connected to a power supply. The output terminals of the multiple power modules are connected to form a second node, which is connected to multiple DCS loads. Each power module is equipped with a current sensor. The power supply system uses the current sharing monitoring method for the nuclear power plant DCS power supply system provided in this application for current sharing monitoring.

[0076] In this embodiment, the power supply branch 200 is an independent or multiple redundant power transmission path that provides power to the DCS load, ensuring that if one branch fails, the other branches can still maintain the normal operation of the system. The power supply system 100 may include two or more power supply branches 200 to achieve dual or multiple redundant power supply. The number of power supply branches 200 can be set according to the load requirements and reliability level requirements of the nuclear power plant's DCS system; for example, it can be dual-path power supply, triple-path power supply, etc.

[0077] A power module can be understood as a conversion device that transforms input electrical energy into the voltage and current format required by the DCS load. A power module can convert input AC or DC power into a stable DC output and, through parallel connection with other power modules, share the load current. The connection between the input terminals of the power modules forms the first node, which can be understood as the common junction point of all power module input terminals, used to receive electrical energy from the power supply.

[0078] The output terminals of the power modules are connected to form a second node, which can be understood as a common junction point for all power module output terminals, used to distribute power to the DCS load. The number of power modules can be N+1 or more, where N is the minimum number of modules required for normal load operation, and 1 is the number of redundancy backups.

[0079] A current sensor can be understood as a component installed inside a power module or in the output circuit to detect the magnitude of current in real time. In this application, each power module is equipped with a current sensor, thereby enabling individual acquisition of the output current of each power module.

[0080] The output of the power module is connected to the second node via a connecting wire through a current sensor, which can provide the original data source required for current sharing monitoring. The current signal collected by the current sensor is transmitted to the monitoring unit to calculate the current difference, determine the fault and generate alarm information, thereby realizing real-time monitoring of the working status of each power module.

[0081] In this application, the power supply system 100 can use the power supply system current sharing monitoring method of the nuclear power plant DCS of this application to monitor the current sharing, thereby enabling real-time monitoring of the current balance between each power module. Once the deviation is found to exceed the preset range, an alarm can be automatically triggered and the faulty module can be located. This solves the problem of not being able to locate the faulty power module in time, greatly improves the reliability of the power supply of the nuclear power plant DCS system, and also reduces the difficulty of operation and maintenance and reduces human error.

[0082] In some embodiments, the current sharing monitoring device for the power supply system of a nuclear power plant's DCS can be implemented as a computer program, which can, for example... Figure 5It runs on the electronic device shown.

[0083] Please see Figure 5 , Figure 5 This is a schematic block diagram of the electronic device provided in the embodiments of this application.

[0084] See Figure 5 The device 500 includes a processor 502, a memory, and a network interface 505 connected via a system bus 501, wherein the memory may include a storage medium 503 and internal memory 504.

[0085] The storage medium 503 may store an operating system 5031 and a computer program 5032. When the computer program 5032 is executed, it enables the processor 502 to execute a current sharing monitoring method for the power supply system of the nuclear power plant's DCS.

[0086] The processor 502 provides computing and control capabilities to support the operation of the entire device 500.

[0087] The internal memory 504 provides an environment for the operation of the computer program 5032 in the non-volatile storage medium 503. When the computer program 5032 is executed by the processor 502, the processor 502 can execute the current sharing monitoring method of the power supply system of the nuclear power plant DCS.

[0088] This network interface 505 is used for network communication, such as providing the transmission of definition information. Those skilled in the art will understand that... Figure 5 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the device 500 to which the present application is applied. The specific device 500 may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0089] The processor 502 is used to run the computer program 5032 stored in the memory to perform the following functions: acquire current signals collected by multiple current sensors and generate a current difference between any two current signals; if the current difference is greater than or equal to a preset first current threshold, generate first alarm information for the two power modules corresponding to the current difference; based on the first alarm information, determine the faulty power module from the two power modules corresponding to the current difference according to the current signals of the two power modules corresponding to the current difference.

[0090] Those skilled in the art will understand that Figure 5The embodiments of device 500 shown do not constitute a limitation on the specific configuration of device 500. In other embodiments, device 500 may include more or fewer components than shown, or combine certain components, or have different component arrangements. For example, in some embodiments, device 500 may include only a memory and processor 502. In such embodiments, the structure and function of the memory and processor 502 are similar to those shown. Figure 5 The embodiments shown are consistent and will not be described again here.

[0091] It should be understood that in the embodiments of this application, the processor 502 may be a central processing unit (CPU), or it may be other general-purpose processors 502, digital signal processors 502 (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor 502 may be a microprocessor 502, or it may be any conventional processor 502, etc.

[0092] According to one aspect of this application, a computer program product or computer program is also provided, comprising computer instructions stored in a computer-readable storage medium. A processor of an electronic device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the electronic device to perform the following steps: acquiring current signals collected by multiple current sensors and generating a current difference between any two current signals; if the current difference is greater than or equal to a preset first current threshold, generating first alarm information for two power modules corresponding to the current difference; based on the first alarm information, determining the faulty power module from the two power modules corresponding to the current difference according to the current signals of the two power modules corresponding to the current difference.

[0093] It will be understood by those skilled in the art that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program includes program instructions and can be stored in a storage medium, which is a computer-readable storage medium. The program instructions are executed by at least one processor in the computer system to implement the process steps of the embodiments of the above methods.

[0094] In another embodiment of this application, a computer storage medium is provided. This storage medium can be a non-volatile computer-readable storage medium or a volatile storage medium. The storage medium stores a computer program 5032, which, when executed by a processor 502, performs the following steps: acquiring current signals collected by multiple current sensors and generating a current difference between any two current signals; if the current difference is greater than or equal to a preset first current threshold, generating first alarm information for two power modules corresponding to the current difference; based on the first alarm information, determining the faulty power module from the two power modules corresponding to the current difference according to the current signals of the two power modules corresponding to the current difference.

[0095] The storage medium can be any computer-readable storage medium that can store program code, such as a USB flash drive, external hard drive, read-only memory (ROM), magnetic disk, or optical disk.

[0096] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this application.

[0097] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For example, the division of each unit is merely a logical functional division, and there may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0098] The steps in the methods of this application embodiment can be adjusted, merged, or deleted according to actual needs. The units in the apparatus of this application embodiment can be merged, divided, or deleted according to actual needs. Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0099] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a storage medium. Based on this understanding, the technical solution of this application, in essence, 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. This computer software product is stored in a storage medium and includes several instructions to cause an electronic device (which may be a personal computer, a terminal, or a network device, etc.) to execute all or part of the steps of the methods provided in the various embodiments of this application.

[0100] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for monitoring current sharing in the power supply system of a nuclear power plant DCS, characterized in that, The power supply system includes multiple power supply branches, each power supply branch includes multiple power modules, the input terminals of the multiple power modules are connected to form a first node, the first node is connected to a power supply, the output terminals of the multiple power modules are connected to form a second node, the second node is connected to multiple DCS loads, each power module is equipped with a current sensor, and the method includes: Acquire current signals collected by multiple current sensors and generate a current difference between any two current signals; If the current difference is greater than or equal to a preset first current threshold, first alarm information for the two power modules corresponding to the current difference is generated. Based on the first alarm information, the faulty power module is determined from the two power modules corresponding to the current difference according to the current signals of the two power modules corresponding to the current difference.

2. The current sharing monitoring method for the power supply system of a nuclear power plant DCS according to claim 1, characterized in that, After acquiring the current signals collected by the multiple current sensors, the method further includes: Determine whether the current signal is greater than or equal to a preset second current threshold; If the current signal is greater than or equal to the second current threshold, a second alarm message for the power supply module corresponding to the current signal is generated.

3. The current sharing monitoring method for the power supply system of a nuclear power plant DCS according to claim 2, characterized in that, The power module also includes an AC / DC converter, one end of which is connected to the input terminal of the power module, and the other end of which is connected to the output terminal of the power module through the current sensor. Before determining whether the current signal is greater than or equal to a preset second current threshold, the method further includes: Obtain the parameter information of the AC / DC converter; The second current threshold is determined based on the parameter information.

4. The current sharing monitoring method for the power supply system of a nuclear power plant DCS according to claim 3, characterized in that, The method further includes: Based on the parameter information, the display area of ​​the current signal corresponding to the power module is determined; The current signal corresponding to the power module is displayed in real time in the display area.

5. The current sharing monitoring method for the power supply system of a nuclear power plant DCS according to any one of claims 1-4, characterized in that, After acquiring the current signals collected by the multiple current sensors, the method further includes: Set a vernier value corresponding to each current signal, and associate the current signal with the vernier value corresponding to the current signal to obtain association information; Based on the associated information, the current signal is stored.

6. The current sharing monitoring method for the power supply system of a nuclear power plant DCS according to any one of claims 1-4, characterized in that, If the current difference is greater than or equal to a preset first current threshold, generating first alarm information for the two power modules corresponding to the current difference includes: The absolute value of the current difference is processed to obtain the absolute current deviation value corresponding to the current difference; If the absolute current deviation value is greater than or equal to the first current threshold, the first alarm information is generated.

7. The current sharing monitoring method for the power supply system of a nuclear power plant DCS according to any one of claims 1-4, characterized in that, The method further includes: In response to the fault query request of the power module, obtain the fault time, fault type, identification information and status information of the power module when the fault occurred; Based on preset rules, the fault time, fault type, identification information, and status information are displayed visually.

8. A power supply system for a nuclear power plant DCS, characterized in that, The system includes multiple power supply branches, each of which includes multiple power modules. The input terminals of the multiple power modules are connected to form a first node, which is connected to a power supply. The output terminals of the multiple power modules are connected to form a second node, which is connected to multiple DCS loads. Each power module is equipped with a current sensor. The power supply system uses the current sharing monitoring method of the power supply system of a nuclear power plant DCS according to any one of claims 1-7 for current sharing monitoring.

9. An electronic device, characterized in that, The device includes a memory and a processor, the memory storing a computer program, characterized in that the processor executes the computer program to implement the steps of the current sharing monitoring method for the power supply system of a nuclear power plant DCS as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, causes the processor to perform the steps of the current sharing monitoring method for the power supply system of a nuclear power plant DCS as described in any one of claims 1 to 7.

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