A multi-stage redundant power supply system for high-voltage frequency converter control power supply

Abstract

This invention relates to the field of power supply system technology, specifically a multi-level redundant power supply system for high-voltage frequency converter control power supply. The system includes a reference processing module, a health assessment module, an instruction determination module, a signal switching module, a bumpless switching module, and a stable output module. The system acquires real-time load demand signals and performs smoothing and filtering on these signals to obtain a load demand reference signal. It then assesses the health status of the power supply blocks in the high-voltage frequency converter to obtain health assessment coefficients; identifies faulty power supply blocks within the power supply blocks to determine the redundancy switching trigger instruction; performs energy efficiency collaborative optimization on the target power supply blocks within the power supply blocks to generate a power supply switching control signal; performs online bumpless switching of the high-voltage frequency converter, connecting the target power supply block to the power supply circuit and isolating the faulty power supply block from the power supply circuit; and determines output stability. This invention can improve the efficiency of multi-level redundant power supply for high-voltage frequency converter control power supply.

Description

Technical Field

[0001] This invention relates to the field of power supply system technology, and in particular to a multi-level redundant power supply system for high-voltage frequency converter control power supply. Background Technology

[0002] Existing technologies have significant shortcomings in load sensing and power supply health assessment for redundant power supplies in high-voltage frequency converters. They fail to synthesize and perform secondary smoothing and filtering of real-time current and voltage signals, simply collecting or filtering them as a reference for load demand. This results in poor stability of the load demand signal, numerous interference factors, and an inability to provide an accurate benchmark for power supply assessment. Furthermore, they fail to comprehensively calculate health assessment coefficients based on multi-dimensional deviation parameters and abnormal statistical data, relying solely on a single indicator or fixed threshold to judge the status of the power supply block. This makes it difficult to comprehensively and accurately reflect the true health status of the power supply block, easily leading to misjudgment or omission of faulty power supply blocks, thus creating safety hazards during redundant power supply switching.

[0003] Existing technologies do not perform energy efficiency optimization based on load demand reference signals and redundancy switching trigger commands. Instead, they randomly select redundant power supply blocks or switch them in a fixed order, resulting in poor adaptability between the target power supply block and load demand, and low power supply efficiency. Furthermore, they do not achieve seamless online switching at the current zero-crossing point, which can easily cause voltage surges and current fluctuations during the switching process, affecting the normal operation of the high-voltage frequency converter. After switching, they do not monitor the output voltage ripple and load response speed in real time, relying solely on experience to judge power supply stability. This makes it impossible to detect potential power supply problems after switching in a timely manner, resulting in insufficient power supply continuity and reliability of the high-voltage frequency converter, making it difficult to meet the needs of high-precision and high-requirement industrial application scenarios. Summary of the Invention

[0004] To achieve the above objectives, the present invention provides a multi-level redundant power supply system for high-voltage frequency converter control power supply, characterized in that the system includes a reference processing module, a health assessment module, an instruction determination module, a signal switching module, a disturbance-free switching module, and a stable output module, wherein:

[0005] The reference processing module is used to acquire the real-time load demand signal of the high-voltage frequency converter and perform smoothing filtering on the real-time load demand signal to obtain the load demand reference signal of the high-voltage frequency converter.

[0006] The health assessment module is used to assess the health status of the power supply block in the high-voltage frequency converter based on the load demand reference signal, and obtain the health assessment coefficient of the high-voltage frequency converter.

[0007] The instruction determination module is used to identify the faulty power supply block in the power supply block according to the health assessment coefficient, so as to determine the redundancy switching trigger instruction of the high voltage frequency converter.

[0008] The signal switching module is used to perform energy efficiency collaborative optimization on the target power supply block in the power supply block according to the redundancy switching trigger command and the load demand reference signal as signal indexes, so as to generate the power supply switching control signal of the high voltage frequency converter.

[0009] The disturbance-free switching module is used to perform online disturbance-free switching of the high-voltage frequency converter based on the power supply switching control signal, so that the target power supply block is connected to the power supply circuit of the high-voltage frequency converter, while isolating the faulty power supply block from the power supply circuit.

[0010] The stable output module is used to monitor the output voltage ripple and load response speed of the target power supply block in real time after the switching is completed, and to determine the output stability of the high-voltage frequency converter.

[0011] In a preferred embodiment, when the reference processing module acquires the real-time load demand signal of the high-voltage frequency converter and performs smoothing and filtering processing on the real-time load demand signal to obtain the load demand reference signal of the high-voltage frequency converter, it is specifically used for:

[0012] Acquire real-time current and voltage signals from the high-voltage frequency converter;

[0013] The real-time current signal and the real-time voltage signal are combined to obtain the real-time load demand signal of the high-voltage frequency converter.

[0014] The real-time load demand signal is low-pass filtered to obtain the primary smooth signal of the high-voltage frequency converter;

[0015] The primary smoothed signal is then subjected to secondary filtering and smoothing to obtain the load demand reference signal of the high-voltage frequency converter.

[0016] In a preferred embodiment, when the health assessment module performs a health status assessment of the power supply block in the high-voltage frequency converter based on the load demand reference signal to obtain the health assessment coefficient of the high-voltage frequency converter, it is specifically used for:

[0017] Real-time monitoring of the output voltage signal of the power supply block in the high-voltage frequency converter;

[0018] The output voltage signal is synchronously compared with the load demand reference signal to obtain the real-time deviation signal of the power supply block;

[0019] Amplitude analysis is performed on the real-time deviation signal to obtain the peak deviation amplitude and average deviation amplitude of the power supply block;

[0020] The duration of the real-time deviation signal is statistically analyzed to obtain the cumulative over-limit time and abnormal fluctuation frequency of the power supply block;

[0021] The health assessment coefficient of the high-voltage frequency converter is obtained by combining the peak deviation amplitude, the average deviation amplitude, the cumulative over-limit time, and the abnormal fluctuation frequency.

[0022] In a preferred embodiment, the formula for calculating the health assessment coefficient is as follows:

[0023] ;

[0024] In the formula, The health assessment coefficient is... The preset reference constant, The peak deviation amplitude, The average deviation amplitude, The cumulative time exceeding the limit, The frequency of the abnormal fluctuations.

[0025] In a preferred embodiment, when the instruction determination module executes the instruction to determine the redundancy switching trigger instruction of the high-voltage frequency converter by identifying the faulty power supply block in the power supply block based on the health assessment coefficient, it is specifically used for:

[0026] The real-time output current and internal temperature signals of the power supply block are collected simultaneously.

[0027] The health assessment coefficients are compared with preset fault thresholds item by item to obtain the power supply block to be confirmed.

[0028] Based on the real-time output current and the internal temperature signal, a second cross-verification is performed on the power supply block to be confirmed, and the abnormal confirmation status of the power supply block is obtained.

[0029] The abnormal confirmation status is used as a judgment criterion to extract the faulty power supply block in the power supply block to be confirmed.

[0030] The forced switching identifier of the faulty power supply block and the target object information are encoded into the redundancy switching trigger command of the high-voltage frequency converter.

[0031] In a preferred embodiment, when the instruction determination module performs secondary cross-validation on the power supply block to be confirmed based on the real-time output current and the internal temperature signal to obtain an abnormal confirmation status in the power supply block, it is specifically used for:

[0032] Based on the equipment specifications of the high-voltage frequency converter, set the corresponding rated current upper limit threshold and safe temperature upper limit threshold for the power supply block to be confirmed.

[0033] The amplitude and duration of the real-time output current are compared with the rated current upper limit threshold to obtain the current over-limit status indicator of the electron supply block to be confirmed.

[0034] By performing amplitude trend analysis on the internal temperature signal and the upper limit threshold of the safe temperature, the temperature over-limit status identifier of the electron supply block to be confirmed is obtained.

[0035] Logical operations are performed on the current over-limit status indicator and the temperature over-limit status indicator to obtain the abnormal confirmation status of the electron supply block to be confirmed.

[0036] In a preferred embodiment, when the signal switching module performs energy efficiency collaborative optimization on the target power supply block in the power supply block based on the redundancy switching trigger command and the load demand reference signal as signal indexes, it is specifically used for:

[0037] Based on the redundancy switching trigger command, the faulty power supply block is excluded from the topology connection relationship of the power supply block to obtain the redundant power supply block;

[0038] Based on the amplitude and trend of the load demand reference signal, the power demand trend of the high-voltage frequency converter is fitted with a characteristic trend to obtain the expected load profile of the high-voltage frequency converter.

[0039] Based on the expected load profile, the redundant power supply block is subjected to multi-dimensional state filtering to obtain the target power supply block.

[0040] In a preferred embodiment, when the signal switching module generates the power supply switching control signal for the high-voltage frequency converter, it is specifically used for:

[0041] The signal frame structure of the target electron donor block is determined based on its physical connection location.

[0042] The signal frame structure is redundantly encoded to obtain the original control command for the target electron block;

[0043] The original control command is pulse-width modulated to obtain the pulse drive waveform of the target electron block;

[0044] The driving capability of the pulse drive waveform is enhanced to obtain the power supply switching control signal of the high-voltage frequency converter.

[0045] In a preferred embodiment, when the disturbance-free switching module performs online disturbance-free switching of the high-voltage frequency converter based on the power supply switching control signal, connecting the target power supply block to the power supply circuit of the high-voltage frequency converter while isolating the faulty power supply block from the power supply circuit, it is specifically used for:

[0046] The power supply switching control signal is analyzed to obtain the access command for the target power supply block and the isolation command for the faulty power supply block, respectively.

[0047] According to the access command, control the static switch group corresponding to the target power supply block to close at the current zero-crossing point of the power supply circuit;

[0048] According to the isolation command, the static switch group corresponding to the faulty power supply block is controlled to disconnect at the current zero-crossing point of the power supply circuit;

[0049] After the static switch group corresponding to the target power supply block is confirmed to be closed and the static switch group corresponding to the faulty power supply block is confirmed to be open, a switching completion confirmation signal for the high-voltage frequency converter is obtained.

[0050] In a preferred embodiment, when the stable output module performs real-time monitoring of the output voltage ripple and load response speed of the target power supply block after switching is completed, and determines the output stability of the high-voltage frequency converter, it is specifically used for:

[0051] The switching completion confirmation signal is input to the terminal of the high-voltage frequency converter to collect the output voltage signal of the target power supply block;

[0052] The output voltage signal is subjected to high-frequency component separation processing to obtain the output voltage ripple of the output voltage signal;

[0053] The load current signal of the high-voltage frequency converter is acquired, and the response time when the load current signal undergoes a step change is extracted to obtain the load response speed of the high-voltage frequency converter.

[0054] The output voltage ripple and the load response speed are integrated to determine the stability confirmation signal of the high-voltage frequency converter.

[0055] Compared with the prior art, the present invention has the following beneficial effects:

[0056] 1. This invention provides reliable upfront protection for redundant power supply of high-voltage frequency converters through precise load sensing and power supply health assessment. Real-time current and voltage signals are collected to synthesize a load demand signal, which is then smoothed and filtered twice to generate a stable load demand reference signal. Based on this reference signal, a health assessment coefficient is calculated by integrating multi-dimensional deviation parameters and abnormal statistical data. This accurately identifies faulty power supply blocks and generates redundancy switching trigger commands, ensuring the timeliness and accuracy of switching decisions.

[0057] 2. This invention significantly improves the continuity and reliability of power supply for high-voltage frequency converters by utilizing intelligent switching and stability monitoring. It selects suitable target power supply modules through energy efficiency collaborative optimization, generates optimized power supply switching control signals, and achieves seamless online switching at the current zero-crossing point, quickly isolating faulty modules. After switching, it monitors output voltage ripple and load response speed in real time, dynamically confirming power supply stability and ensuring the continuous and stable operation of the high-voltage frequency converter, meeting the requirements of demanding power supply scenarios. Attached Figure Description

[0058] Figure 1 This is a system architecture diagram of a multi-level redundant power supply system for a high-voltage frequency converter control power supply provided in an embodiment of the present invention;

[0059] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0060] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments belong to some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0061] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “said” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two unless the context clearly indicates otherwise.

[0062] Depending on the context, the word "if" or "if" as used here can be interpreted as "when," "when," "in response to determination," or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination," "in response to determination," "when detection (of the stated condition or event)," or "in response to detection (of the stated condition or event)."

[0063] Furthermore, the timing of the steps in the following method embodiments is merely an example and not a strict limitation.

[0064] In practice, a server-side device deployed in a multi-level redundant power supply system for high-voltage frequency converter control power supply may consist of one or more devices. This multi-level redundant power supply system for high-voltage frequency converter control power supply can be implemented as: a business instance, a virtual machine, or hardware devices. For example, this multi-level redundant power supply system for high-voltage frequency converter control power supply can be implemented as a business instance deployed on one or more devices in a cloud node. Simply put, this multi-level redundant power supply system for high-voltage frequency converter control power supply can be understood as software deployed on a cloud node, used to provide a multi-level redundant power supply system for high-voltage frequency converter control power supply to each user terminal. Alternatively, this multi-level redundant power supply system for high-voltage frequency converter control power supply can also be implemented as a virtual machine deployed on one or more devices in a cloud node. This virtual machine contains application software for managing each user terminal. Alternatively, this multi-level redundant power supply system for high-voltage frequency converter control power supply can also be implemented as a server composed of numerous identical or different types of hardware devices, with one or more hardware devices configured to provide a multi-level redundant power supply system for high-voltage frequency converter control power supply to each user terminal.

[0065] In terms of implementation, the multi-level redundant power supply system for high-voltage frequency converter control power supply and the user terminal are mutually compatible. That is, if the multi-level redundant power supply system for high-voltage frequency converter control power supply is implemented as an application installed on a cloud service platform, then the user terminal is a client that establishes a communication connection with the application; or if the multi-level redundant power supply system for high-voltage frequency converter control power supply is implemented as a website, then the user terminal is implemented as a webpage; or if the multi-level redundant power supply system for high-voltage frequency converter control power supply is implemented as a cloud service platform, then the user terminal is implemented as a mini-program in an instant messaging application.

[0066] like Figure 1 The figure shown is a system architecture diagram of a multi-level redundant power supply system for high-voltage frequency converter control power supply provided by an embodiment of the present invention.

[0067] The multi-level redundant power supply system 100 for high-voltage frequency converter control power supply described in this invention can be set up in a cloud server. In terms of implementation, it can be used as one or more service devices, or as an application installed in the cloud (e.g., a mobile service operator's server, server cluster, etc.), or it can be developed into a website. Depending on the functions implemented, the multi-level redundant power supply system 100 for high-voltage frequency converter control power supply may include a reference processing module 101, a health assessment module 102, an instruction determination module 103, a signal switching module 104, a disturbance-free switching module 105, and a stable output module 106. The module described in this invention can also be called a unit, which refers to a series of computer program segments that can be executed by the processor of an electronic device and can perform a fixed function, stored in the memory of the electronic device.

[0068] In this embodiment of the invention, in a multi-level redundant power supply system for high-voltage frequency converter control power supply, each of the above-mentioned modules can be implemented independently and called upon with other modules. Here, "called upon" can be understood as a module connecting to multiple modules of another type and providing corresponding services to those connected modules. This embodiment of the invention provides a multi-level redundant power supply system for high-voltage frequency converter control power supply that allows for adjustment of the applicable scope of the system architecture without modifying the program code. This is achieved by adding modules and directly calling them, enabling cluster-based horizontal expansion and flexibly expanding the system. In practical applications, the above modules can be set in the same device or different devices, or they can be set in a virtual device, such as a service instance in a cloud server.

[0069] The following describes, with reference to specific embodiments, each component and its specific workflow in a multi-level redundant power supply system for high-voltage frequency converter control power supply:

[0070] The reference processing module 101 is used to acquire the real-time load demand signal of the high-voltage frequency converter and perform smoothing filtering on the real-time load demand signal to obtain the load demand reference signal of the high-voltage frequency converter.

[0071] In this embodiment of the invention, when the reference processing module acquires the real-time load demand signal of the high-voltage frequency converter and performs smoothing filtering on the real-time load demand signal to obtain the load demand reference signal of the high-voltage frequency converter, it is specifically used for:

[0072] Acquire real-time current and voltage signals from the high-voltage frequency converter;

[0073] The real-time current signal and the real-time voltage signal are combined to obtain the real-time load demand signal of the high-voltage frequency converter.

[0074] The real-time load demand signal is low-pass filtered to obtain the primary smooth signal of the high-voltage frequency converter;

[0075] The primary smoothed signal is then subjected to secondary filtering and smoothing to obtain the load demand reference signal of the high-voltage frequency converter.

[0076] Dedicated signal acquisition devices are deployed at the current output terminal and voltage output terminal of the high-voltage frequency converter. The acquisition devices continuously capture current and voltage data during operation at a fixed acquisition frequency. All acquired current data are continuously recorded in chronological order to form the real-time current signal of the high-voltage frequency converter, and all acquired voltage data are synchronously recorded in chronological order to form the real-time voltage signal of the high-voltage frequency converter.

[0077] The real-time current signal and real-time voltage signal are imported into a preset signal synthesis unit. Using time as a unified reference, the current data and voltage data corresponding to the same moment are extracted one by one. According to the calculation logic of load demand in the power system, the current data and voltage data at each moment are correlated and integrated. Through a fixed synthesis method, the two types of data are transformed into a unified signal that can reflect the real-time operating load of the high-voltage frequency converter. This signal is the real-time load demand signal of the high-voltage frequency converter.

[0078] The real-time load demand signal is processed by a preset low-pass filter. The low-pass filter has a fixed frequency filtering characteristic, which allows useful signals below the set frequency in the real-time load demand signal to pass smoothly, while blocking high-frequency interference signals above the set frequency. By removing high-frequency noise from the signal through this frequency filtering method, a smooth signal after filtering is obtained. This signal is the primary smoothing signal of the high-voltage frequency converter.

[0079] The primary smoothed signal is input into the secondary filtering unit, which uses the same core filtering logic as the low-pass filter to further refine the frequency selection range and filter out the subtle high-frequency fluctuations remaining in the primary smoothed signal. Through two consecutive filtering processes, various interference components in the signal are gradually eliminated, making the signal waveform more stable and regular, and finally obtaining a stable signal that can accurately reflect the actual load requirements of the high-voltage frequency converter. This signal is the load requirement reference signal of the high-voltage frequency converter.

[0080] The beneficial effects are that by simultaneously acquiring the real-time current and voltage signals of the high-voltage frequency converter, the core power parameters during equipment operation can be fully captured, providing complete and accurate raw data support for subsequent load demand analysis and avoiding the one-sidedness of load judgment caused by single signal acquisition.

[0081] The two types of real-time signals are synthesized and processed. The data is integrated according to the inherent logic of the power system load demand. The scattered current and voltage information is transformed into a unified signal that can directly reflect the operating load of the equipment, and the real-time load demand signal of the high-voltage frequency converter is accurately obtained.

[0082] Low-pass filtering is used to perform preliminary processing on the real-time load demand signal, effectively filtering out high-frequency interference noise and obtaining a stable primary smooth signal. This lays the foundation for further signal quality optimization and reduces the impact of interference factors on load benchmark judgment.

[0083] The primary smoothed signal is then subjected to secondary filtering and smoothing to further refine the signal processing flow, eliminate residual minor fluctuations, and make the signal waveform more regular and stable. Ultimately, a highly accurate and stable load demand reference signal is obtained, providing a reliable reference for subsequent stages such as power supply health assessment and redundancy switching decisions, and ensuring the accurate operation of the high-voltage frequency converter redundant power supply system.

[0084] The health assessment module 102 is used to assess the health status of the power supply block in the high-voltage frequency converter based on the load demand reference signal, and obtain the health assessment coefficient of the high-voltage frequency converter.

[0085] In this embodiment of the invention, when the health assessment module performs a health status assessment of the power supply block in the high-voltage frequency converter based on the load demand reference signal to obtain the health assessment coefficient of the high-voltage frequency converter, it is specifically used for:

[0086] Real-time monitoring of the output voltage signal of the power supply block in the high-voltage frequency converter;

[0087] The output voltage signal is synchronously compared with the load demand reference signal to obtain the real-time deviation signal of the power supply block;

[0088] Amplitude analysis is performed on the real-time deviation signal to obtain the peak deviation amplitude and average deviation amplitude of the power supply block;

[0089] The duration of the real-time deviation signal is statistically analyzed to obtain the cumulative over-limit time and abnormal fluctuation frequency of the power supply block;

[0090] The health assessment coefficient of the high-voltage frequency converter is obtained by combining the peak deviation amplitude, the average deviation amplitude, the cumulative over-limit time, and the abnormal fluctuation frequency.

[0091] The formula for calculating the health assessment coefficient is as follows:

[0092] ;

[0093] In the formula, The health assessment coefficient is... The preset reference constant, The peak deviation amplitude, The average deviation amplitude, The cumulative time exceeding the limit, The frequency of the abnormal fluctuations.

[0094] A dedicated voltage monitoring device is deployed at the output port of the power supply block of the high-voltage frequency converter. The monitoring device continuously captures the voltage data output by the power supply block during operation at a fixed monitoring frequency. All collected voltage data are continuously recorded in chronological order to form a signal that can reflect the changes in the output voltage of the power supply block in real time. This signal is the output voltage signal of the power supply block in the high-voltage frequency converter.

[0095] The output voltage signal and the load demand reference signal are imported into the signal synchronization comparison unit. Using a unified time axis as the reference, the two types of signals are fully aligned in the time dimension. The voltage value of the output voltage signal at the same moment is compared with the standard value of the load demand reference signal one by one. The difference between the two values ​​at each moment is calculated. The difference values ​​at all moments are integrated in chronological order to form a signal that can reflect the deviation between the power supply block output and the load demand. This signal is the real-time deviation signal of the power supply block.

[0096] A comprehensive analysis is performed on all the difference values ​​contained in the real-time deviation signal. The magnitude of each value is sorted out one by one, and the value with the largest difference is selected. This value is the peak deviation amplitude of the power supply block. At the same time, all the difference values ​​are summarized, and the overall average level of these values ​​is obtained through a fixed calculation method. This average level is the average deviation amplitude of the power supply block.

[0097] A fixed deviation threshold is set to define whether the difference value in the real-time deviation signal is within the normal range. The real-time deviation signal is tracked throughout the entire process, and all time periods when the difference value exceeds the deviation threshold are counted. The durations of these time periods are accumulated, and the total duration is the cumulative over-limit time of the power supply block. At the same time, the number of times the difference value exceeds the normal range and then returns to the normal range is recorded. This number is the abnormal fluctuation frequency of the power supply block.

[0098] Establish fixed comprehensive evaluation rules, and incorporate peak deviation amplitude, average deviation amplitude, cumulative over-limit time and abnormal fluctuation frequency into a unified evaluation system. Based on the degree of influence of each indicator on the health status of the power supply block, assign a fixed weight to each indicator. Through a fixed integration method, convert the values ​​of the four indicators into a single quantitative result, which is the health evaluation coefficient of the high-voltage frequency converter.

[0099] Among the parameters related to the health assessment coefficient, the preset benchmark constant is a fixed value pre-set according to the design standard of the high-voltage frequency converter power supply block, the normal operating parameter range and the industry health assessment specifications, which is used to provide a unified reference benchmark for health assessment.

[0100] The peak deviation amplitude is derived from the amplitude analysis of the real-time deviation signal of the power supply block. By sorting out all the difference values ​​in the real-time deviation signal, the largest difference value is selected.

[0101] The average deviation amplitude also originates from the amplitude analysis of the real-time deviation signal. It is obtained by summing up all the difference values ​​in the real-time deviation signal and calculating the overall average level of all the difference values.

[0102] The cumulative over-limit time is obtained by statistically analyzing the duration of the real-time deviation signal. After setting a fixed deviation threshold, the system tracks all time periods in the real-time deviation signal where the difference value exceeds the threshold and sums up the duration of these time periods.

[0103] The frequency of abnormal fluctuations is also the result of statistics on the duration of the real-time deviation signal. It is obtained by recording the number of times the difference value in the real-time deviation signal exceeds the normal range and then returns to the normal range.

[0104] The significance of this formula lies in its ability to quantitatively assess the health status of high-voltage frequency converters by integrating various deviations and abnormality-related indicators during the operation of the power supply block.

[0105] The formula constructs a proportional evaluation logic by using a preset benchmark constant as the numerator and the sum of the benchmark constant, peak deviation amplitude, average deviation amplitude, cumulative over-limit time, and abnormal fluctuation frequency as the denominator.

[0106] When the peak deviation amplitude is smaller, the average deviation amplitude is smaller, the cumulative over-limit time is shorter, and the frequency of abnormal fluctuations is less, the denominator value is closer to the reference constant, and the health assessment coefficient is closer to the fixed ideal value. This indicates that the output of the high-voltage frequency converter power supply block matches the load demand reference signal better, and the health status of the high-voltage frequency converter is better.

[0107] The larger the values ​​of various deviations and abnormal indicators, the larger the denominator value and the smaller the health assessment coefficient. This indicates that the operating deviation of the high-voltage frequency converter power supply block is greater, the abnormal situation is more frequent, and the health status of the high-voltage frequency converter is worse. Thus, the health level of the high-voltage frequency converter can be intuitively reflected through a single quantitative result.

[0108] The beneficial effects are that it can monitor the output voltage signal of the power supply block in real time, dynamically capture the voltage changes during the operation of the power supply block, ensure that the power supply status data obtained is true and timely, and provide continuous basic data support for health assessment.

[0109] The output voltage signal is synchronously compared with the load demand reference signal to accurately locate the difference between the actual output of the power supply block and the load demand, forming a real-time deviation signal that can directly reflect the power supply matching degree, providing a clear analysis object for subsequent evaluation.

[0110] Amplitude analysis of the real-time deviation signal is performed to extract the peak deviation amplitude and the average deviation amplitude, which not only captures the extreme cases of deviation but also reflects the overall level of deviation, thus comprehensively characterizing the amplitude characteristics of the power supply block output deviation.

[0111] By statistically analyzing the cumulative over-limit time and abnormal fluctuation frequency of real-time deviation signals, and quantifying the continuous impact and fluctuation frequency of deviations, the shortcomings of focusing only on amplitude while ignoring the time dimension are compensated for, making the assessment more in line with actual operating scenarios.

[0112] By comprehensively calculating the health assessment coefficient using multiple dimensions of indicators, and integrating key information such as amplitude, time, and frequency, the one-sidedness of assessment using a single indicator is avoided. This allows for the accurate quantification of the health status of the power supply block, providing a scientific and reliable basis for identifying faulty power supply blocks and reducing the risk of misjudgment or omission.

[0113] The formula takes a preset benchmark constant as the core reference and integrates multiple dimensions of indicators such as peak deviation amplitude, average deviation amplitude, cumulative over-limit time and abnormal fluctuation frequency. It comprehensively covers the amplitude, time and frequency characteristics of power supply block operation deviation, avoids the one-sidedness of single indicator evaluation, and makes the quantification of health status more comprehensive.

[0114] By using a fixed proportional calculation logic, the dispersed multi-dimensional operational data is transformed into a single health assessment coefficient, enabling intuitive quantification of the power supply block's health status. This facilitates rapid assessment of the power supply block's operational status and reduces the complexity of manual analysis.

[0115] The deviations and abnormal indicators in the formula are inversely correlated with the health assessment coefficient. The larger the deviation and the more frequent the abnormalities, the smaller the health assessment coefficient. This accurately reflects the actual health level of the power supply block, provides a clear quantitative basis for fault identification, and improves the accuracy of fault judgment.

[0116] The preset benchmark constant is set based on equipment design standards and industry specifications to ensure that the formula calculation results have a unified evaluation scale, which is applicable to the health evaluation of power supply blocks of high voltage frequency converters of different specifications, and enhances the universality and comparability of the evaluation results.

[0117] The formula calculation logic is simple and clear, and the evaluation results can be quickly output without complex calculations. It is easy to embed into the system for automatic operation, realize the real-time dynamic evaluation of the power supply block health status, provide timely support for redundancy switching decisions, and ensure the power supply stability of the high-voltage frequency converter.

[0118] The instruction determination module 103 is used to identify the faulty power supply block in the power supply block according to the health assessment coefficient, so as to determine the redundancy switching trigger instruction of the high voltage frequency converter.

[0119] In this embodiment of the invention, when the instruction determination module executes the instruction to determine the redundancy switching trigger instruction of the high-voltage frequency converter by identifying the faulty power supply block in the power supply block based on the health assessment coefficient, it is specifically used for:

[0120] The real-time output current and internal temperature signals of the power supply block are collected simultaneously.

[0121] The health assessment coefficients are compared with preset fault thresholds item by item to obtain the power supply block to be confirmed.

[0122] Based on the real-time output current and the internal temperature signal, a second cross-verification is performed on the power supply block to be confirmed, and the abnormal confirmation status of the power supply block is obtained.

[0123] The abnormal confirmation status is used as a judgment criterion to extract the faulty power supply block in the power supply block to be confirmed.

[0124] The forced switching identifier of the faulty power supply block and the target object information are encoded into the redundancy switching trigger command of the high-voltage frequency converter.

[0125] When the instruction determination module performs secondary cross-verification on the power supply block to be confirmed based on the real-time output current and the internal temperature signal to obtain the abnormal confirmation status of the power supply block, it is specifically used for:

[0126] Based on the equipment specifications of the high-voltage frequency converter, set the corresponding rated current upper limit threshold and safe temperature upper limit threshold for the power supply block to be confirmed.

[0127] The amplitude and duration of the real-time output current are compared with the rated current upper limit threshold to obtain the current over-limit status indicator of the electron supply block to be confirmed.

[0128] By performing amplitude trend analysis on the internal temperature signal and the upper limit threshold of the safe temperature, the temperature over-limit status identifier of the electron supply block to be confirmed is obtained.

[0129] Logical operations are performed on the current over-limit status indicator and the temperature over-limit status indicator to obtain the abnormal confirmation status of the electron supply block to be confirmed.

[0130] A current acquisition device is deployed at the output end of the power supply block, and a temperature sensing device is deployed in the key heat-generating area inside the power supply block. The two types of devices operate synchronously at the same acquisition frequency to continuously capture the current and temperature data of the power supply block during operation. All the acquired current data are continuously recorded in chronological order to form the real-time output current of the power supply block, and all the acquired temperature data are synchronously recorded in chronological order to form the internal temperature signal of the power supply block.

[0131] Based on the safety operation standards, fault judgment specifications, and industry technical requirements of the power supply block of the high-voltage frequency converter, a fixed fault threshold is pre-set. The calculated health assessment coefficient is directly compared with the fault threshold. If the health assessment coefficient is lower than the fault threshold, it indicates that the corresponding power supply block has a potential fault risk. Such power supply blocks are marked as objects that need further verification. These marked power supply blocks are the power supply blocks to be confirmed.

[0132] The real-time output current and internal temperature signals of the power supply block to be confirmed are retrieved. The current and temperature ranges under normal operating conditions of the power supply block are set as verification standards. The real-time output current and internal temperature signal of each power supply block to be confirmed are compared to see if they are within the normal range. If the real-time output current or internal temperature signal exceeds the normal range and is consistent with the fault risk reflected by the health assessment coefficient, the power supply block to be confirmed is determined to be abnormal. If both signals are within the normal range, the power supply block to be confirmed is determined to be normal. The judgment results of all power supply blocks to be confirmed are integrated to form the abnormal confirmation status of the power supply block.

[0133] Using the abnormal confirmation status as the core criterion, the power supply blocks that are identified as having abnormalities in the abnormal confirmation status are screened out. These power supply blocks have been confirmed to have faults after health assessment coefficient comparison and real-time signal secondary verification, and are identified as faulty power supply blocks in the power supply blocks.

[0134] Each faulty power supply block is assigned a unique forced switching identifier, which identifies the faulty component that needs to be shut down when redundancy switching is triggered. Simultaneously, the target object information of the standby power supply block in the high-voltage frequency converter is obtained, including key information such as the standby power supply block's location and model compatibility parameters. Through a fixed coding rule, the forced switching identifier and target object information are integrated into a unified instruction code. This instruction code accurately conveys the execution requirements for fault switching, serving as the redundancy switching trigger instruction for the high-voltage frequency converter.

[0135] Retrieve the equipment specification parameter file of the high-voltage frequency converter, extract the design and operation standards of the power supply block to be confirmed, and combine the circuit carrying capacity, heat dissipation design limits and industry safety operation specifications of the power supply block to determine the maximum current value that the power supply block to be confirmed can stably withstand. This value is the upper limit threshold of the rated current of the power supply block to be confirmed. At the same time, based on the temperature resistance performance of the internal components of the power supply block, the overall heat dissipation efficiency of the equipment and the long-term operational reliability requirements, determine the highest allowable temperature value of the power supply block during normal operation. This value is the upper limit threshold of the safe temperature of the power supply block to be confirmed.

[0136] The system continuously tracks the real-time output current of the power supply unit to be confirmed, records the current value at fixed time intervals, and compares the current value at each time point with the rated current upper limit threshold to determine whether the real-time output current exceeds the rated current upper limit threshold. If the real-time output current remains above the rated current upper limit threshold for a certain period of time, and the duration of this period reaches the preset judgment time standard, the power supply unit to be confirmed is marked as being in a current over-limit state. If the real-time output current never exceeds the rated current upper limit threshold, or the over-limit duration does not reach the judgment time, it is marked as being in a normal current state. This marking result is the current over-limit status identifier for the power supply unit to be confirmed.

[0137] The internal temperature signals are analyzed chronologically to determine the temperature trends, and each temperature value is compared to the upper limit of the safe temperature threshold. If the temperature shows a continuous upward trend and eventually exceeds the upper limit of the safe temperature threshold, or if the temperature does not show a continuous upward trend but repeatedly exceeds the upper limit of the safe temperature threshold, the electron supply block to be confirmed is marked as being in an over-temperature state. If the temperature remains below the upper limit of the safe temperature threshold and the trend is stable without abnormal fluctuations, it is marked as being in a normal temperature state. This marking result is the over-temperature status identifier for the electron supply block to be confirmed.

[0138] A fixed logical judgment rule is set, incorporating the current over-limit status indicator and the temperature over-limit status indicator into the same judgment system. If both the current over-limit status indicator and the temperature over-limit status indicator are both set to "current over-limit", the electron power supply block to be confirmed is determined to be in an abnormal state. Similarly, if the current over-limit status indicator is set to "current over-limit" but the temperature over-limit status indicator is set to "temperature normal", or if the current over-limit status indicator is set to "current normal" but the temperature over-limit status indicator is set to "temperature over-limit", the electron power supply block to be confirmed is also determined to be in an abnormal state. Only when both the current over-limit status indicator and the temperature over-limit status indicator are set to "current normal" is the electron power supply block to be confirmed in a normal state. This final judgment result is the abnormal confirmation state of the electron power supply block to be confirmed.

[0139] The beneficial effects are that the real-time output current and internal temperature signals of the power supply block are collected simultaneously, and the operating status of the power supply block is captured from two core dimensions: current load and heating status. This provides comprehensive and three-dimensional real-time data support for fault identification and avoids misjudgment of faults caused by a single signal dimension.

[0140] By comparing the health assessment coefficient with the preset fault threshold item by item, the system can quickly screen out the power supply blocks that have potential fault risks, identify the key objects for fault investigation, improve the targeting and efficiency of fault identification, and avoid the waste of resources caused by indiscriminate investigation.

[0141] The electron power supply block is cross-validated based on dual-dimensional real-time signals. By logically verifying the current and temperature over-limit states, the fault risk is further verified, the possibility of misjudgment of health assessment coefficient is eliminated, the accuracy of abnormal confirmation status is ensured, and the probability of missed fault detection is reduced.

[0142] Using the abnormal confirmation status as a clear judgment criterion, the verified faulty power supply block is directly extracted, so that the fault identification results have a clear judgment basis, avoiding the uncertainty brought about by subjective judgment, and ensuring the objectivity and accuracy of faulty power supply block identification.

[0143] The forced switching identifier of the faulty power supply block and the target object information are encoded into a redundant switching trigger command. This ensures that the command contains a clear switching object and target, guaranteeing the accurate execution of the redundant switching action. It also provides clear and reliable command support for subsequent seamless switching, ensuring the continuity of power supply to the high-voltage frequency converter.

[0144] Based on the specifications of the high-voltage frequency converter, set the upper limit threshold of rated current and the upper limit threshold of safe temperature to ensure that the thresholds are accurately matched with the design standards and operating limits of the power supply block to be confirmed. This provides a scientific and exclusive reference benchmark for subsequent over-limit judgments and avoids misjudgments caused by general thresholds.

[0145] The amplitude and duration of the real-time output current and the upper limit threshold of the rated current are judged. This not only focuses on whether the current exceeds the limit, but also considers the duration of the over-limit. It comprehensively captures the complete state of the current anomaly and obtains an accurate current over-limit status indicator, avoiding misjudgment of the power supply block status based solely on the instantaneous current value.

[0146] By combining the upper limit threshold of safe temperature with amplitude trend analysis of internal temperature signals, it can not only determine whether the temperature exceeds the limit, but also track the temperature change trend, identify potential overheating risks in advance, and form a comprehensive temperature over-limit status indicator, making up for the limitations of only focusing on instantaneous temperature.

[0147] Logical operations are performed on the two types of out-of-limit status indicators to integrate abnormal information from the current and temperature dimensions, forming a unified abnormal confirmation status. This ensures that fault diagnosis covers the core operating indicators of the power supply block, avoids fault omissions caused by single-dimensional verification, and improves the comprehensiveness and accuracy of fault confirmation.

[0148] The entire secondary cross-validation process is based on equipment-specific thresholds and multi-dimensional status analysis, which provides clear criteria for determining abnormal statuses, provides reliable support for subsequent fault supply block extraction, further ensures the accuracy of redundancy switching decisions, and reduces the operational risks of high-voltage frequency converters.

[0149] The signal switching module 104 is used to perform energy efficiency collaborative optimization on the target power supply block in the power supply block according to the redundancy switching trigger command and the load demand reference signal as signal indexes, so as to generate the power supply switching control signal of the high voltage frequency converter.

[0150] In this embodiment of the invention, when the signal switching module performs energy efficiency collaborative optimization on the target power supply block in the power supply block based on the redundancy switching trigger command and the load demand reference signal as signal indexes, it is specifically used for:

[0151] Based on the redundancy switching trigger command, the faulty power supply block is excluded from the topology connection relationship of the power supply block to obtain the redundant power supply block;

[0152] Based on the amplitude and trend of the load demand reference signal, the power demand trend of the high-voltage frequency converter is fitted with a characteristic trend to obtain the expected load profile of the high-voltage frequency converter.

[0153] Based on the expected load profile, the redundant power supply block is subjected to multi-dimensional state filtering to obtain the target power supply block.

[0154] When the signal switching module generates the power supply switching control signal for the high-voltage frequency converter, it is specifically used for:

[0155] The signal frame structure of the target electron donor block is determined based on its physical connection location.

[0156] The signal frame structure is redundantly encoded to obtain the original control command for the target electron block;

[0157] The original control command is pulse-width modulated to obtain the pulse drive waveform of the target electron block;

[0158] The driving capability of the pulse drive waveform is enhanced to obtain the power supply switching control signal of the high-voltage frequency converter.

[0159] The faulty power supply block forced switching identifier contained in the redundancy switching trigger command is analyzed, and the topology connection diagram of the power supply blocks is retrieved. This diagram clearly shows the connection logic, signal transmission paths, and cooperative working relationships between all power supply blocks. Based on the forced switching identifier, the corresponding faulty power supply block is locked, and the connection between this faulty power supply block and other power supply blocks and the main circuit of the high-voltage frequency converter is severed in the topology connection diagram. It is then excluded from the effective working units of the power supply system. The remaining power supply blocks that are not excluded and have normal power supply capabilities are the redundant power supply blocks of the power supply block.

[0160] Amplitude data at all times is extracted from the load demand baseline signal. The amplitude changes are analyzed chronologically to clarify the high and low amplitude distribution ranges and fluctuation patterns, thereby capturing the trend of the load demand baseline signal and determining whether it is stable, rising, or declining. Based on these amplitude characteristics and trends, and referring to the correspondence between the high-voltage frequency converter's power output and load demand, the trend of the high-voltage frequency converter's power demand change over a future period is fitted. By restoring the core characteristics of load demand, a virtual load model that accurately reflects the future load size and change rhythm is constructed. This model is the expected load profile of the high-voltage frequency converter.

[0161] Using the anticipated load profile as the core reference standard, a multi-dimensional status screening was conducted on all redundant power supply blocks. First, it was verified whether the rated power of the redundant power supply blocks matched the load size in the anticipated load profile, ensuring that the power supply blocks had the power supply capacity to meet future load demands. Second, the output stability of the redundant power supply blocks was checked by retrieving their historical operating data to confirm whether the fluctuation range of their output voltage and current was within the allowable range. Simultaneously, the topology compatibility of the redundant power supply blocks was verified to ensure smooth connection and conflict-free operation with the remaining parts of the power supply system. Based on the results of these multi-dimensional status checks, redundant power supply blocks with matching power, stable output, and topology compatibility were selected; these power supply blocks are the target power supply blocks for the power supply module.

[0162] Retrieve the topology diagram of the high-voltage frequency converter power supply system to determine the specific physical installation location of the target power supply block in the entire power supply circuit, as well as the corresponding signal transmission interface, pin definitions, and communication protocol requirements. Based on these physical connection parameters and communication specifications, determine the specific structure of the start identifier, data field, check field, and end identifier of the signal frame, clarifying the functional arrangement of each field to ensure that the signal frame can accurately match the signal reception specifications of the target power supply block. This determined signal structure is the signal frame structure of the target power supply block.

[0163] A fixed redundancy coding method is used to encode the signal frame structure, adding extra redundancy check information to the data field of the signal frame. This redundancy check information corresponds one-to-one with the original data of the signal frame, completely replicating the core characteristics of the original data. The encoding process strictly adheres to the signal frame structure specifications, ensuring that the redundancy check information is transmitted synchronously with the original data without interfering with its validity. The resulting complete instruction, containing both the original data and the redundancy check information, constitutes the original control instruction for the target electron block.

[0164] The original control command is input to the pulse width modulation (PWM) processing unit, which converts the original control command into a series of pulse signals according to a fixed modulation rule. By adjusting the on-time and off-time of the pulse signals, the average level of the pulse signals is made consistent with the level of the original control command, while ensuring that the pulse signals have a stable frequency and amplitude. The pulse sequence obtained after modulation processing is the pulse drive waveform of the target electron block.

[0165] The pulse drive waveform is fed into the drive capability enhancement circuit. This circuit amplifies the current and voltage amplitudes of the pulse drive waveform to improve its driving capability, ensuring that the pulse drive waveform can effectively drive the switching devices inside the target power supply block to operate normally. During the enhancement process, waveform distortion is strictly controlled to maintain the frequency and pulse width of the pulse drive waveform, avoiding any impact on control accuracy due to waveform distortion. The stable pulse drive signal obtained after drive capability enhancement processing is the power supply switching control signal for the high-voltage frequency converter.

[0166] The beneficial effects are that, based on the redundancy switching trigger command, faulty power supply blocks are eliminated, and redundant power supply blocks with normal power supply capabilities are accurately selected, avoiding interference from faulty modules on subsequent power supply adaptation, thus laying a reliable foundation for the selection of target power supply blocks.

[0167] By fitting the power demand trend with the amplitude and change trend of the load demand reference signal, the constructed expected load profile can accurately predict the future load state of the high-voltage frequency converter, making the selection of target power supply blocks more in line with actual power supply needs.

[0168] Redundant power supply blocks are screened from multiple dimensions based on the expected load profile, taking into account key indicators such as power matching, output stability and topology compatibility, to ensure that the target power supply block is highly adapted to the load requirements and improve power supply efficiency.

[0169] The entire energy efficiency optimization process revolves around the dual cores of load demand and fault isolation, systematically selecting the optimal target power supply block to avoid poor adaptability caused by random selection or fixed switching, thus ensuring the stability of subsequent power supply switching.

[0170] By combining topology analysis, load trend prediction, and multi-dimensional screening, the selection of target power supply modules is both scientific and targeted, ensuring that the high-voltage frequency converter can operate efficiently and stably after redundancy switching, meeting the needs of high-demand power supply scenarios.

[0171] The signal frame structure is determined based on the physical connection location of the target power supply block, so that the signal frame is precisely matched with the interface specifications and communication protocol of the power supply block. This ensures that the control signal can be accurately identified and received by the target power supply block, and avoids the failure of switching commands due to incompatibility of signal structure.

[0172] Redundant encoding of the signal frame structure and the addition of verification information to the original data can effectively resist interference during transmission, promptly detect and correct signal errors, ensure the integrity and reliability of the original control commands, and provide a precise command basis for power supply switching.

[0173] The original control command is converted into a pulse drive waveform by pulse width modulation, so that the command signal has stable frequency and amplitude characteristics, which can be adapted to the driving requirements of the internal switching devices of the power supply block, and ensure the accurate triggering and smooth execution of the switching action.

[0174] The driving capability of the pulse drive waveform is enhanced, the current and voltage amplitude of the signal are increased, and the driving signal can overcome the influence of the internal resistance of the device, effectively drive the switching device to operate, and ensure that the target power supply block is quickly and reliably connected to the power supply circuit.

[0175] The entire signal generation process is optimized from multiple dimensions, including adaptability, reliability, and drive capability. The resulting power supply switching control signal combines accuracy and strong drive capability, providing strong support for seamless online switching and ensuring smooth and stable power supply switching for high-voltage frequency converters.

[0176] The disturbance-free switching module 105 is used to perform online disturbance-free switching of the high-voltage frequency converter based on the power supply switching control signal, so that the target power supply block is connected to the power supply circuit of the high-voltage frequency converter, while isolating the faulty power supply block from the power supply circuit.

[0177] In this embodiment of the invention, when the disturbance-free switching module performs online disturbance-free switching of the high-voltage frequency converter based on the power supply switching control signal, so that the target power supply block is connected to the power supply circuit of the high-voltage frequency converter, and the faulty power supply block is isolated from the power supply circuit, it is specifically used for:

[0178] The power supply switching control signal is analyzed to obtain the access command for the target power supply block and the isolation command for the faulty power supply block, respectively.

[0179] According to the access command, control the static switch group corresponding to the target power supply block to close at the current zero-crossing point of the power supply circuit;

[0180] According to the isolation command, the static switch group corresponding to the faulty power supply block is controlled to disconnect at the current zero-crossing point of the power supply circuit;

[0181] After the static switch group corresponding to the target power supply block is confirmed to be closed and the static switch group corresponding to the faulty power supply block is confirmed to be open, a switching completion confirmation signal for the high-voltage frequency converter is obtained.

[0182] The power supply switching control signals were retrieved and fully analyzed to extract two types of core instructions. One type is the instruction for controlling the target power supply block to access the power supply circuit. This instruction clearly includes the identifier of the target power supply block, the access timing, and the action requirements, which is the access instruction for the target power supply block. The other type is the instruction for controlling the faulty power supply block to disconnect from the power supply circuit. This instruction clearly includes the identifier of the faulty power supply block, the isolation timing, and the action requirements, which is the isolation instruction for the faulty power supply block. This ensures that the two types of instructions are clearly separated, unambiguous, and the original control requirements are fully preserved.

[0183] The system extracts the target power supply block identifier from the access command and locks the corresponding static switch group based on this identifier. This static switch group directly controls the on / off state of the target power supply block and the power supply circuit. It monitors the current changes in the high-voltage inverter's power supply circuit in real time, continuously tracking the current value's trajectory and accurately capturing the instant the current value reaches zero—the zero-crossing point of the power supply circuit. Upon capturing the zero-crossing point, a closing control signal is immediately sent to the corresponding static switch group, controlling its smooth closure to ensure the target power supply block can gradually connect to the power supply circuit without current surges.

[0184] The faulty power supply block identifier is extracted from the isolation command. Based on this identifier, the corresponding static switch group is locked. This static switch group directly controls the connection status between the faulty power supply block and the power supply circuit. The current changes in the high-voltage inverter power supply circuit are continuously and synchronously monitored, maintaining consistency with the monitoring logic when the target power supply block is connected. The zero-crossing point of the power supply circuit current is accurately captured to ensure that the isolation and connection actions are synchronized. At the instant the current crosses zero, a disconnection control signal is sent to the static switch group corresponding to the faulty power supply block, controlling the static switch group to disconnect smoothly, avoiding current arcing or surges during disconnection, and ensuring that the faulty power supply block can safely disconnect from the power supply circuit.

[0185] The system provides real-time feedback on the operational status of the static switch groups corresponding to the target power supply block and the faulty power supply block. A dedicated monitoring unit verifies whether the static switch group corresponding to the target power supply block is fully closed, confirming good contact, no looseness, and stable current transmission. Simultaneously, it verifies whether the static switch group corresponding to the faulty power supply block is fully open, confirming no continuity and complete isolation from the power supply circuit. When both verifications are confirmed as successful—that is, the static switch group corresponding to the target power supply block is confirmed closed and the static switch group corresponding to the faulty power supply block is confirmed open—it indicates that the high-voltage frequency converter's online seamless switching operation has been successfully completed. At this point, a signal characterizing the switching completion status is generated; this signal is the high-voltage frequency converter's switching completion confirmation signal.

[0186] The beneficial effects are that the power supply switching control signal can be analyzed to obtain clear access and isolation instructions, accurately distinguish the operation requirements of the target power supply block and the faulty power supply block, avoid execution errors caused by confusion of switching instructions, and provide clear instruction guidance for seamless switching.

[0187] Choosing the zero-crossing point of the power supply circuit current as the closing time of the static switch group minimizes the current surge, avoiding voltage fluctuations or device damage when the target power supply block is connected, ensuring a smooth and uninterrupted connection process, and guaranteeing the continuous operation of the high-voltage frequency converter.

[0188] Synchronously disconnect the static switch group corresponding to the faulty power supply block at the current zero-crossing point to reduce current arcing and energy loss during disconnection, reduce interference from the faulty module isolation to the power supply circuit, and prevent the fault from spreading and affecting other components.

[0189] The closed and open states of the static switch group are double-confirmed to ensure reliable access to the target power supply block and complete isolation of the faulty power supply block, thereby avoiding power supply abnormalities caused by incomplete switch operation and ensuring the effectiveness and safety of the switching results.

[0190] A switching completion confirmation signal is generated, providing clear feedback on the switching execution status and a clear trigger basis for the subsequent monitoring of the stable output module. This forms a complete closed loop of switching-confirmation-monitoring, further improving the reliability of the high-voltage frequency converter power supply system.

[0191] The stable output module 106 is used to monitor the output voltage ripple and load response speed of the target power supply block in real time after the switching is completed, and to determine the output stability of the high voltage frequency converter.

[0192] In this embodiment of the invention, when the stable output module performs real-time monitoring of the output voltage ripple and load response speed of the target power supply block after switching is completed, and determines the output stability of the high-voltage frequency converter, it is specifically used for:

[0193] The switching completion confirmation signal is input to the terminal of the high-voltage frequency converter to collect the output voltage signal of the target power supply block;

[0194] The output voltage signal is subjected to high-frequency component separation processing to obtain the output voltage ripple of the output voltage signal;

[0195] The load current signal of the high-voltage frequency converter is acquired, and the response time when the load current signal undergoes a step change is extracted to obtain the load response speed of the high-voltage frequency converter.

[0196] The output voltage ripple and the load response speed are integrated to determine the stability confirmation signal of the high-voltage frequency converter.

[0197] The switching completion confirmation signal is transmitted to the terminal control unit of the high-voltage frequency converter. Upon receiving the signal, the terminal control unit immediately triggers the output monitoring function of the target power supply block and starts the preset voltage acquisition device at the output port of the target power supply block. The acquisition device continuously captures the voltage data output by the target power supply block at a fixed monitoring frequency. All acquired voltage data are continuously recorded in chronological order to form a signal that can reflect the real-time changes in the output voltage of the target power supply block. This signal is the output voltage signal of the target power supply block.

[0198] The acquired output voltage signal is imported into the high-frequency component separation processing unit. This unit uses a fixed signal separation method to distinguish and filter different frequency components in the output voltage signal, and accurately separates the high-frequency fluctuation components in the output voltage signal. These high-frequency fluctuation components are the redundant ripple components in the output voltage signal. The high-frequency fluctuation signal obtained after separation processing is the output voltage ripple of the output voltage signal.

[0199] A dedicated current acquisition device is deployed at the load connection end of the high-voltage frequency converter. This device operates synchronously with the voltage acquisition device, continuously capturing load current data during the operation of the high-voltage frequency converter at the same acquisition frequency. All acquired current data are continuously recorded in chronological order to form the load current signal of the high-voltage frequency converter. The load current signal is tracked and analyzed throughout its entire lifecycle to accurately identify the moment when the load current signal value undergoes a sudden step change. Simultaneously, the complete time from the step change in the load current signal to the target power supply block's output voltage adjusting to a stable state is recorded. This time is the load response speed of the high-voltage frequency converter.

[0200] Establish fixed collaborative integration rules to incorporate output voltage ripple and load response speed into a unified stability evaluation system, and conduct comprehensive analysis and judgment on the two indicators. If the fluctuation amplitude of the output voltage ripple is within the preset normal range and the load response speed can meet the stable operation requirements of the high-voltage frequency converter, it indicates that the output of the high-voltage frequency converter is stable after switching, and a signal characterizing output stability is generated. If either indicator fails to meet the requirements, it indicates that there is a potential for output instability, and a signal characterizing output instability is generated. This generated signal is the stability confirmation signal of the high-voltage frequency converter.

[0201] The beneficial effects are that by using the confirmation signal for the completion of the switch as the trigger, the acquisition of the output voltage signal of the target power supply block is accurately initiated, ensuring a seamless connection between the monitoring and switching processes, avoiding the distortion of results caused by the timing deviation of the monitoring, and providing timely and synchronous basic data for stability judgment.

[0202] The output voltage signal is processed by high-frequency component separation to accurately extract the output voltage ripple, which directly reflects the stability of the power supply voltage, promptly detects potential voltage fluctuations, and makes up for the shortcomings of traditional monitoring that ignores subtle ripples.

[0203] By synchronously acquiring load current signals and extracting the response time during step changes, the adaptability of the target electron-donating block to load changes is quantified, and the stability assessment is improved from the perspective of dynamic response, avoiding the one-sidedness of judging solely by static indicators.

[0204] By synergistically integrating two core indicators—output voltage ripple and load response speed—a multi-dimensional stability evaluation system is constructed, comprehensively covering voltage stability and dynamic adaptability. This ensures that the evaluation results are scientific, comprehensive, and accurately reflect the actual operating status of the high-voltage frequency converter after switching.

[0205] It generates clear stability confirmation signals, provides clear feedback on power supply stability results, and provides an intuitive basis for subsequent operation and maintenance decisions. If there are potential instability risks, it can provide timely warnings, further ensuring the continuous and reliable operation of the high-voltage frequency converter and meeting the power supply requirements of high-precision industrial scenarios.

[0206] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0207] This application embodiment can acquire and process relevant data based on artificial intelligence technology. Artificial intelligence is the theory, method, technology, and application system that uses digital computers or machines controlled by digital computers to simulate, extend, and expand human intelligence, perceive the environment, acquire knowledge, and use that knowledge to obtain optimal results.

[0208] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A multi-level redundant power supply system for high-voltage frequency converter control power supply, characterized in that, The system includes a reference processing module, a health assessment module, an instruction determination module, a signal switching module, a disturbance-free switching module, and a stable output module, wherein: The reference processing module is used to acquire the real-time load demand signal of the high-voltage frequency converter and perform smoothing filtering on the real-time load demand signal to obtain the load demand reference signal of the high-voltage frequency converter. The health assessment module is used to assess the health status of the power supply block in the high-voltage frequency converter based on the load demand reference signal, and obtain the health assessment coefficient of the high-voltage frequency converter. The instruction determination module is used to identify the faulty power supply block in the power supply block according to the health assessment coefficient, so as to determine the redundancy switching trigger instruction of the high voltage frequency converter. The signal switching module is used to perform energy efficiency collaborative optimization on the target power supply block in the power supply block according to the redundancy switching trigger command and the load demand reference signal as signal indexes, so as to generate the power supply switching control signal of the high voltage frequency converter. The disturbance-free switching module is used to perform online disturbance-free switching of the high-voltage frequency converter based on the power supply switching control signal, so that the target power supply block is connected to the power supply circuit of the high-voltage frequency converter, while isolating the faulty power supply block from the power supply circuit. The stable output module is used to monitor the output voltage ripple and load response speed of the target power supply block in real time after the switching is completed, and to determine the output stability of the high-voltage frequency converter.

2. The multi-level redundant power supply system for high-voltage frequency converter control power supply as described in claim 1, characterized in that, When the reference processing module acquires the real-time load demand signal of the high-voltage frequency converter and performs smoothing and filtering processing on the real-time load demand signal to obtain the load demand reference signal of the high-voltage frequency converter, it is specifically used for: Acquire real-time current and voltage signals from the high-voltage frequency converter; The real-time current signal and the real-time voltage signal are combined to obtain the real-time load demand signal of the high-voltage frequency converter. The real-time load demand signal is low-pass filtered to obtain the primary smooth signal of the high-voltage frequency converter; The primary smoothed signal is then subjected to secondary filtering and smoothing to obtain the load demand reference signal of the high-voltage frequency converter.

3. A multi-level redundant power supply system for high-voltage frequency converter control power supply as described in claim 1, characterized in that, When the health assessment module performs a health status assessment of the power supply block in the high-voltage frequency converter based on the load demand reference signal to obtain the health assessment coefficient of the high-voltage frequency converter, it is specifically used for: Real-time monitoring of the output voltage signal of the power supply block in the high-voltage frequency converter; The output voltage signal is synchronously compared with the load demand reference signal to obtain the real-time deviation signal of the power supply block; Amplitude analysis is performed on the real-time deviation signal to obtain the peak deviation amplitude and average deviation amplitude of the power supply block; The duration of the real-time deviation signal is statistically analyzed to obtain the cumulative over-limit time and abnormal fluctuation frequency of the power supply block; The health assessment coefficient of the high-voltage frequency converter is obtained by combining the peak deviation amplitude, the average deviation amplitude, the cumulative over-limit time, and the abnormal fluctuation frequency.

4. A multi-level redundant power supply system for high-voltage frequency converter control power supply as described in claim 3, characterized in that, The formula for calculating the health assessment coefficient is as follows: ； In the formula, The health assessment coefficient is... The preset reference constant, The peak deviation amplitude, The average deviation amplitude, The cumulative time exceeding the limit, The frequency of the abnormal fluctuations.

5. A multi-level redundant power supply system for high-voltage frequency converter control power supply as described in claim 1, characterized in that, When the instruction determination module executes the instruction to determine the redundancy switching trigger instruction of the high-voltage frequency converter by identifying the faulty power supply block in the power supply block based on the health assessment coefficient, it is specifically used for: The real-time output current and internal temperature signals of the power supply block are collected simultaneously. The health assessment coefficients are compared with preset fault thresholds item by item to obtain the power supply block to be confirmed. Based on the real-time output current and the internal temperature signal, a second cross-verification is performed on the power supply block to be confirmed, and the abnormal confirmation status of the power supply block is obtained. The abnormal confirmation status is used as a judgment criterion to extract the faulty power supply block in the power supply block to be confirmed. The forced switching identifier of the faulty power supply block and the target object information are encoded into the redundancy switching trigger command of the high-voltage frequency converter.

6. A multi-level redundant power supply system for high-voltage frequency converter control power supply as described in claim 5, characterized in that, When the instruction determination module performs secondary cross-verification on the power supply block to be confirmed based on the real-time output current and the internal temperature signal to obtain the abnormal confirmation status of the power supply block, it is specifically used for: Based on the equipment specifications of the high-voltage frequency converter, set the corresponding rated current upper limit threshold and safe temperature upper limit threshold for the power supply block to be confirmed. The amplitude and duration of the real-time output current are compared with the rated current upper limit threshold to obtain the current over-limit status indicator of the electron supply block to be confirmed. By performing amplitude trend analysis on the internal temperature signal and the upper limit threshold of the safe temperature, the temperature over-limit status indicator of the electron supply block to be confirmed is obtained. Logical operations are performed on the current over-limit status indicator and the temperature over-limit status indicator to obtain the abnormal confirmation status of the electron supply block to be confirmed.

7. A multi-level redundant power supply system for high-voltage frequency converter control power supply as described in claim 1, characterized in that, When the signal switching module executes energy efficiency collaborative optimization of the target power supply block in the power supply block based on the redundancy switching trigger command and the load demand reference signal as signal indexes, it is specifically used for: Based on the redundancy switching trigger command, the faulty power supply block is excluded from the topology connection relationship of the power supply block to obtain the redundant power supply block; Based on the amplitude and trend of the load demand reference signal, the power demand trend of the high-voltage frequency converter is fitted with a characteristic trend to obtain the expected load profile of the high-voltage frequency converter. Based on the expected load profile, the redundant power supply block is subjected to multi-dimensional state filtering to obtain the target power supply block.

8. A multi-level redundant power supply system for high-voltage frequency converter control power supply as described in claim 7, characterized in that, When the signal switching module generates the power supply switching control signal for the high-voltage frequency converter, it is specifically used for: The signal frame structure of the target electron donor block is determined based on its physical connection location. The signal frame structure is redundantly encoded to obtain the original control command for the target electron block; The original control command is pulse-width modulated to obtain the pulse drive waveform of the target electron block; The driving capability of the pulse drive waveform is enhanced to obtain the power supply switching control signal of the high-voltage frequency converter.

9. A multi-level redundant power supply system for high-voltage frequency converter control power supply as described in claim 1, characterized in that, When the disturbance-free switching module executes online disturbance-free switching of the high-voltage frequency converter based on the power supply switching control signal, enabling the target power supply block to connect to the power supply circuit of the high-voltage frequency converter, and simultaneously isolating the faulty power supply block from the power supply circuit, it is specifically used for: The power supply switching control signal is analyzed to obtain the access command for the target power supply block and the isolation command for the faulty power supply block, respectively. According to the access command, control the static switch group corresponding to the target power supply block to close at the current zero-crossing point of the power supply circuit; According to the isolation command, the static switch group corresponding to the faulty power supply block is controlled to disconnect at the current zero-crossing point of the power supply circuit; After the static switch group corresponding to the target power supply block is confirmed to be closed and the static switch group corresponding to the faulty power supply block is confirmed to be open, a switching completion confirmation signal for the high-voltage frequency converter is obtained.

10. A multi-level redundant power supply system for high-voltage frequency converter control power supply as described in claim 1, characterized in that, After the switching is completed, the stable output module monitors the output voltage ripple and load response speed of the target power supply block in real time to determine the output stability of the high-voltage frequency converter. Specifically, it is used for: The switching completion confirmation signal is input to the terminal of the high-voltage frequency converter to collect the output voltage signal of the target power supply block; The output voltage signal is subjected to high-frequency component separation processing to obtain the output voltage ripple of the output voltage signal; The load current signal of the high-voltage frequency converter is acquired, and the response time when the load current signal undergoes a step change is extracted to obtain the load response speed of the high-voltage frequency converter. The output voltage ripple and the load response speed are integrated to determine the stability confirmation signal of the high-voltage frequency converter.

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