351 results about "Power supply failure" patented technology

The invention discloses a power supply fault rapid detection system and method based on an intelligent diagnosis engine, and belongs to the technical field of power electronic equipment fault diagnosis, and the system comprises a function region division module which is mainly used for dividing a plurality of function regions according to a power supply topological structure; the real-time data acquisition module is mainly used for acquiring parameter data of each functional area in a power supply operation stage; the current model building module is mainly used for building a current time sequence prediction model; the trend prediction module is mainly used for generating a future current change trend; the abnormity judgment module is mainly used for identifying an abnormal condition by performing similarity matching with real-time data; the fault positioning module is mainly used for matching with a fault mode based on an abnormal current waveform and constructing a directed graph to position a fault position; the method has the advantages that early warning and accurate positioning of the power supply fault are realized through multi-modal data fusion and a deep learning model, and the operation and maintenance efficiency and reliability of the power electronic equipment are remarkably improved.

The invention relates to a power equipment state self-healing operation and maintenance method, and belongs to the field of power equipment operation and maintenance, and the method comprises the steps: obtaining the real-time operation state data of a power supply in a current multi-source power supply system, collecting the data through a preset sampling frequency, and constructing a power supply state matrix; a conversion time constraint condition is set in advance, a zero-delay switching decision tree is constructed and a power supply switching decision is output in combination with a main power supply fault risk assessment result, and if the main power supply fault risk assessment result is abnormal, the standby power supplies are switched according to the determined switching priorities of the standby power supplies and the power supply switching decision; after the switching is completed, monitoring the power supply continuity index of the power equipment in real time, and if the power supply fluctuation time or the phase jump amplitude exceeds a preset allowable value, smoothing the power supply fluctuation by adopting the rapid power compensation function of the energy storage device; the stability and reliability of the multi-source power supply system are improved, and intelligent power supply switching and self-healing disaster recovery are realized.

The invention relates to the technical field of electrical fault detection, in particular to a mobile power supply fault detection method and system based on intelligent diagnosis, and the method comprises the following steps: collecting voltage and current data of a mobile power supply in a normal operation state, and generating an electrical performance baseline data set through recording the timestamp of the data and a corresponding electrical performance index; and based on the electrical performance baseline data set, extracting time sequence features of voltage and current to obtain electrical performance feature data. According to the invention, based on voltage and current data acquisition in a normal state of the mobile power supply, a baseline data set covering timestamps and electrical performance indexes is established, and detail information of electrical performance changes is captured by extracting time sequence features such as peak values, mean values and standard deviations; meanwhile, frequency spectrum features are accurately extracted by means of fast Fourier transform, the intensity and phase information of frequency components is mastered, then signals are decomposed through wavelet transform, and richer electrical performance anomaly information under multiple scales is obtained.

The invention discloses a power supply system, a server, a fault detection method, equipment and a storage medium, and relates to the technical field of servers, a first electronic switch and a fault processing circuit are arranged on a mainboard, and the reliability and complete fault record of the system can be ensured under the condition that a standby power supply fails. Specifically, when a first standby power supply provided by the power supply distribution board through the first electronic switch is abnormal, the first electronic switch is turned off, and the fault processing circuit can continue to work after the standby power supply breaks down, so that accurate and complete recording of fault information is realized, and data support is provided for subsequent fault reason analysis; therefore, the to-be-tested power supply can be effectively monitored.

The invention discloses a rapid communication and redundancy control method for an AGC substation of a distributed photovoltaic power station, and the method comprises the following steps: S1, receiving an automatic power generation control instruction from a power grid dispatching system in parallel and uploading real-time operation data of the photovoltaic power station through two independent communication links; according to the invention, the reliability and robustness of the system are fundamentally improved; by constructing a physical basis of parallel work of two paths of independent communication links and combining real-time state monitoring and a millisecond-level rapid switching mechanism, the method thoroughly changes the fragile situation that the whole substation is disconnected and the function is paralyzed due to a single communication channel or a power supply fault of a traditional system; when the main optical fiber link is interrupted due to construction damage or equipment failure, the system can automatically and seamlessly switch all communication services to the standby Ethernet or wireless link without depending on manual intervention, and it is ensured that the transmission path of the scheduling control instruction is always smooth.

The invention relates to the field of power supply fault prediction, in particular to a power supply power distribution fault prediction method and system based on BMS data analysis driving. The method comprises the following steps: calling a BMS (Battery Management System) to collect a historical monitoring log of a power supply, carrying out periodic power disturbance change analysis and normalized power perturbation evolution, and constructing a normalized power perturbation state diagram of a plurality of battery cells; state evolution mining is carried out on the battery cells one by one based on a power supply historical monitoring log, multi-dimensional personalized state perception is carried out, and a personalized state portrait of each battery cell is constructed; calculating request power deviation of the battery cells, performing power distribution coordination analysis among the battery cells, performing power distribution game logic mining based on the personalized state portrait, and identifying a power distribution game rule of the battery cells; and performing power distribution prediction and power distribution track deviation comparison according to the power distribution game rule, and extracting a continuous deviation accumulation region. According to the method, the accuracy and the real-time performance of power distribution fault prediction of the power supply are improved.

The invention relates to a cable branch box with an uninterruptible access interface, and relates to the technical field of cable branch boxes, the cable branch box comprises a box body and a box door installed on the box body, an interface seat is fixedly arranged on the rear wall of the box body, and an observation window close to the interface seat is detachably installed on the box door; a limiting block located above the interface base is arranged on the rear wall of the box body in a sliding mode, and a limiting notch is formed in the bottom face of the limiting block; vertically-downward connecting rods are fixedly arranged on the two opposite vertical faces of the limiting block, and an adjusting piece for driving the connecting rods to move downwards and a reset piece for driving the connecting rods to move upwards to reset are arranged on the inner wall of the box body. The upper part of the interface seat is clamped into the limiting notch when the connecting rod moves downwards, and is separated from the limiting notch when the connecting rod moves upwards; according to the invention, the installation stability of the interface seat is improved, the plugging stability of an external cable plug is ensured, a power supply fault caused by poor contact is avoided, and the reliability of power transmission is ensured.

The invention relates to the technical field of vehicles, in particular to a dual-redundancy power supply management system and method, and the system comprises an intelligent power distribution unit which is integrated with a first-stage power distribution circuit and a second-stage power distribution circuit; a plurality of MOS (Metal Oxide Semiconductor) tubes are arranged in the primary power distribution circuit and are used for executing corresponding switching operations according to different power failure modes; the secondary power supply distribution circuit comprises a plurality of high-side driving units and is used for providing controlled power supply output for a load, and the high-side driving units have the functions of current detection, temperature detection and fault protection; and the control unit is used for controlling the on-off states of the MOS tube and the high-side driving unit and realizing feedback and remote control of fault information through a bus. Therefore, the problems of low integration level, limited functions, insufficient safety, difficulty in meeting high-order intelligent driving requirements and the like of a vehicle power supply management scheme in related technologies are solved.

The invention discloses a base station power supply fault intelligent diagnosis method and system based on anomaly detection, and the method comprises the following steps: S1, collecting and preprocessing multi-modal monitoring data, and generating a multi-dimensional time series data set; s2, inputting the multi-dimensional time sequence data set into an improved ResNet-18 network for feature extraction, and generating a power supply fault feature vector; s3, inputting the power supply fault feature vector into an improved bee colony algorithm for anomaly detection, and outputting a power supply abnormal state mark and a power supply fault mode; s4, outputting a power supply fault diagnosis label through the classification function; s5, calling a power supply fault diagnosis label mapping rule, and outputting a power supply fault diagnosis result; and S6, based on the correlation matching degree, adjusting the convolutional layer weight of the improved ResNet-18 network and the fitness function parameter of the improved bee colony algorithm. According to the method, deep residual network modeling and a swarm intelligence anomaly identification mechanism are fused, and accurate identification, adaptive optimization and closed-loop diagnosis of the power supply fault of the base station are realized.

According to the intelligent storage battery state detection system and the control method, a dynamic early warning mechanism is constructed by monitoring voltage parameters of a storage battery device of an aerial work platform and real-time working condition parameters of a vehicle in real time, and early warning prompt is actively triggered when voltage abnormity or an electric quantity critical threshold value is detected; operation interruption caused by insufficient electric quantity in the operation process is effectively prevented, meanwhile, accurate monitoring of storage battery voltage early warning is enhanced through a closed-loop control algorithm, the operation reliability and the use safety of equipment are remarkably improved, and potential safety hazards caused by power supply faults are reduced to the maximum extent; according to the method, a self-adaptive charging strategy is synchronously integrated, bidirectional communication with a lithium battery management system is carried out based on periodic voltage monitoring data, accurate charging control is realized, continuous and stable operation of the aerial work platform is guaranteed, the use efficiency of the storage battery is synchronously improved, the maintenance cost is reduced, and a complete storage battery health management solution is formed.

Network optimization and repair using Artificial Intelligence (AI) / Machine Learning (ML) is disclosed. More specifically, AI / ML models are trained to predict hardware and software failures of Radio Access Network (RAN) components by analyzing telemetry data and / or trained to extend battery life during power failures. The telemetry data may include performance logs from performance monitors, fault logs from fault monitors, and traffic information for traffic flowing through the RAN. Hardware specifications of the RAN equipment, operating temperatures, power consumption, etc. may also be stored and monitored. This data may be monitored across the infrastructure, platform, and application layers. One or more rApps in a Non-Real Time RAN Intelligent Controller (NRT RIC) may use the AI / ML models to predict failures, and potentially, provide an indication of an estimated time when failure is predicted to occur.

The invention discloses a power fault detection device for a communication power supply, and belongs to the technical field of communication power supply fault detection, and the method comprises the steps: carrying out the hyper-parameter optimization of a deep learning model through employing the historical operation data in a normal operation state and the historical operation data in a fault operation state; and the real-time operation data is analyzed by adopting the optimized deep learning model, so that a power failure detection result of the communication power supply can be obtained, automatic power failure detection of the communication power supply is realized, and an optimization algorithm for the deep learning model is improved, so that the power failure identification accuracy can be effectively improved.

The invention provides an ESC controller fault injection test system. The system comprises a programmable power supply, a fault simulation development board, a probe, an upper computer, a CAN tester and a to-be-tested ESC controller. Wherein the upper computer is used for controlling the programmable power supply to provide a current signal and a voltage signal to the fault simulation development board through the first communication line; the upper computer is also used for sending a fault simulation instruction to the CAN tester through the second communication line; the CAN tester is used for converting the fault simulation instruction into a CAN instruction and providing the CAN instruction to the fault simulation development board through a third communication line; the fault simulation development board is connected with the ESC controller to be tested through a probe, and the fault simulation development board provides a power supply environment and a fault environment for the ESC controller to be tested based on the CAN instruction; the ESC controller to be tested is used for determining a fault code according to the power supply environment and the fault environment and feeding back the fault code to the CAN tester, and the CAN tester converts the fault code into fault information and feeds back the fault information to the upper computer. And the fault injection test can be automatically realized.

The invention relates to a scale out network backup path fast switching notification system and method, and aims to solve the problem that the existing VRRP / BFD protocol switching time cannot meet the high real-time requirement of an AI server scale out network. The scheme is realized through a collaborative architecture of a CPU (Central Processing Unit), an inspection FPGA (Field Programmable Gate Array) and power supply monitoring: the CPU runs a VRRP / BFD (Bidirectional Forwarding Detection) protocol stack and maintains a state table, and the FPGA is responsible for detecting a power supply fault, a port fault and GPU alarm in real time, and generating and sending a pre-installed message in one main frequency period; and the power supply monitoring module ensures that power supply is maintained for more than or equal to 5ms after sudden power failure through the energy storage capacitor, so that complete transmission of fault messages is ensured. The system has the advantages that the system supports multi-scale out interface redundancy, the end-to-end delay of fault detection and backup path switching is smaller than or equal to 1ms by adopting a low-power-consumption switching chip and independent minimum power domain design, the fault response speed and reliability of an AI server scale out network are remarkably improved, and the system is suitable for guaranteeing the network continuity of a high-density AI training cluster.

The present application relates to a power failure detection method and system for an air conditioning device. The method includes respectively obtaining the main board voltage detection value, transformer voltage detection value, and plug voltage detection value when the air conditioning device is powered on, and performing data cleaning processing to obtain the preprocessed air conditioning operation data. Furthermore, a power phase waveform among the main board, transformer, and power plug of the air conditioning device is drawn, and the power phase sequence balance relationship of the air conditioning device is analyzed. The abnormal power phase sequence is analyzed in combination with the historical fault data of the air conditioning device and the power phase sequence balance relationship. According to the analysis results, a power failure analysis model for analyzing the power failure of the air conditioning device is constructed. The power failure analysis model performs power failure analysis on the power phase data in the power failure state of the air conditioning device to obtain the power failure detection data corresponding to the current power failure phase. The present application has the effect of improving the intelligent degree of power failure detection of the air conditioning device.

The invention discloses a high-side driving circuit, an electronic device, a vehicle and a control method. False triggering of a short-circuit protection mechanism is avoided. The high-side driving circuit comprises a power distribution circuit, a sampling circuit and a fault protection circuit, the power distribution circuit comprises a PMOS transistor and a first resistance circuit; the grid electrode of the PMOS tube is grounded through the first resistance circuit, the drain electrode of the PMOS tube is connected with a load, and the source electrode of the PMOS tube and the input end of the fault protection circuit are connected with a power supply; the output end of the fault protection circuit is connected with the grid electrode of the PMOS tube; the sampling circuit is connected with the drain electrode of the PMOS tube and the ground; the output end of the sampling circuit and the control end of the fault protection circuit are connected to the control unit; the control unit judges whether load short circuit occurs or not according to the sampling voltage, if not, the fault protection circuit is forbidden to output voltage, and if yes, the fault protection circuit is controlled to convert input voltage into target voltage to be output; the PMOS tube is in a variable resistance region when the fault protection circuit has no voltage output, and enters a cut-off region when the PMOS tube outputs a target voltage.

The utility model relates to a dual-power-supply switching system suitable for a settling tank stirring motor, which belongs to the technical field of aluminum oxide production control and comprises a main power supply, a standby power supply, a zero-cross detection module, an overload protection module, a power supply switching module, a relay driving module and a stirring motor. The main power supply and the standby power supply are both connected with a zero-cross detection module and an overload protection module, the zero-cross detection module and the overload protection module are both connected with a power supply switching module, the power supply switching module is connected with a stirring motor through a relay driving module, and the power supply switching module is further connected with a main controller and a standby controller. According to the utility model, the main power supply and the standby power supply can be automatically switched, the power supply fault problem or the overload problem caused by material deposition can be overcome, and the stable and continuous operation of the settling tank stirring motor in the aluminum oxide production can be ensured.

The invention provides a control method for suppressing light-load turn-off stress of a synchronous rectifier tube. The control method comprises the following steps: determining a control module setting end level based on a preset high-level threshold voltage and a control module setting end voltage; receiving a power supply fault signal, and determining a control module data end level based on the power supply fault signal; receiving a clock signal, and determining the driving end level of the control module based on the clock signal; determining a control module output end level based on the control module data end level, the control module driving end level and the control module setting end level so as to generate a PWM closing signal based on the control module output end level; and controlling the main control module to close PWM output at a preset safety moment based on the PWM closing signal, thereby realizing suppression of the turn-off stress of the synchronous rectifier tube. According to the control method and circuit for suppressing the light-load turn-off stress of the synchronous rectifier tube, the power supply fault signal and the clock signal are combined to control the main control module to turn off PWM output at the safe moment, and the stress problem of the synchronous rectifier tube is avoided.

The invention relates to the technical field of electronic equipment, in particular to a power supply fault diagnosis device of a server system and a server wherein the power supply fault diagnosis device of the server system comprises a first programmable controller, a first baseboard management controller, a first power supply unit, a second power supply unit and an anomaly detection and switching unit. By arranging the anomaly detection and switching unit, the standby power supply module can be triggered in time when the first power supply unit of the server is abnormal, continuous power supply of the first programmable controller and the first substrate management controller is ensured, and an out-of-band management function is kept uninterrupted; therefore, real-time detection, recording and reporting of faults can still be realized under the condition of STBY power supply faults, the technical problem that power supply faults cannot be diagnosed due to power loss of the BMC and the CPLD in the prior art is effectively solved, and the power supply reliability, the fault diagnosis coverage rate and the maintainability of a server system are remarkably improved.

The invention discloses an efficient and accurate control system for a new energy commercial truck based on DSP redundancy. According to the invention, the dual-core DSP is adopted to improve the system performance. One core focuses on wave sending processing, voltage, current and temperature sampling work, operation control algorithm and communication functions; and the other core is used for detection and protection, fault processing, a self-learning algorithm and a fault pre-judgment algorithm. Meanwhile, the CAL coprocessor is used for sharing a signal calculation processing task, remarkably reducing CPU load and improving the overall operation efficiency of the system, and two groups of power modules are mutually backed up, so that when one group of power supply fails, the other group of power supply can be quickly switched, stable power supply of the system is ensured, system shutdown caused by power supply failure is effectively avoided, and the service life of the system is prolonged. Precise detection of three-phase current is achieved through a hardware addition circuit, three sets of data are displayed at the same time and verified mutually, data misjudgment caused by faults of a single collection point is prevented, and therefore reliable data support is provided for precise control of a system.

The invention discloses a method and a system for analyzing applicability of a power directional element for flexibly and directly sending new energy, which are combined with a specific action criterion and a power electronic power supply fault ride-through control strategy, select a proper electrical quantity as an evaluation index, depict an electrical quantity allowable change area mapped by a correct action of the power directional element, and analyze the applicability of the power directional element. And carrying out power direction element applicability analysis on the basis of depicting a protection correct action allowable change region. According to the method, the reliable action boundary of the power direction element under the complex fault working condition can be determined, an important theoretical basis and technical support are provided for adaptive transformation of relay protection in a large-scale new energy delivery system, and the safety and reliability of the system are improved.

The invention discloses a power supply fault detection method and electronic equipment, and relates to the technical field of integrated circuits, and the power supply fault detection method realizes fault detection of a power supply unit through the power supply unit, a control unit and a service system which are connected, and comprises the following steps: firstly, updating a timestamp of the power supply unit according to the time of the control unit; and the power supply log information is generated and stored in the power supply unit, so that the problem of inaccurate time of the power supply log information in related technologies can be relieved, and the accuracy of power supply fault detection is improved. And on the other hand, the power supply log information stored in the power supply unit is sent to the control unit through the received log reading instruction of the user, so that the problems of resource occupation and bandwidth occupation of the control unit caused by frequent access of the control unit to the power supply unit in related technologies can be relieved; and the operation efficiency of the control unit is improved.

The invention discloses a multi-path power source redundant power supply control method and system, and belongs to the technical field of power electronics, the system comprises a dynamic priority decision module, a zero-voltage-drop switching circuit and a fault safety framework, the dynamic priority decision module supports a user to customize a power source use priority rule through an MCU, and the zero-voltage-drop switching circuit is used for switching the zero-voltage-drop switching circuit to the fault safety framework. The MCU can autonomously carry out an automatic degradation and upgrading mechanism through voltage quality; according to the zero-voltage-drop switching circuit, when the MCU detects a fault of the main power supply, a target power supply pre-charging path is started, and when the target power supply is pre-charged until the voltage difference between the target power supply and the source voltage is smaller than or equal to 0.1 V, the target power supply GaNFET can be synchronously triggered to be switched on, and the pre-charging circuit and the original power supply GaNFET can be synchronously triggered to be switched off. The multi-path power supply input automatic switching circuit solves the problems of power-off risk, easy conduction loss and relatively high failure rate in the prior art, is suitable for a multi-path power supply input automatic switching system of a decoder and industrial control equipment, and is particularly suitable for a long-time uninterrupted power supply condition.

The invention relates to a novel intelligent calculation center power supply framework which comprises an A-path power supply module, a B-path power supply module, a diesel generator power supply module and a cabinet module. Wherein the A-path power supply module, the B-path power supply module and the diesel generator power supply module are used for supplying power to the cabinet module in a normal operation state, an A-path commercial power supply fault state, a B-path commercial power supply fault state and a double-path commercial power supply fault state respectively, and the cabinet module comprises an AC-DC rectifier module, a super capacitor and a cabinet. And the cabinet module is used for inputting the accessed power supply to the cabinet through the AC-DC rectifier module and the super capacitor. The power supply architecture is mainly formed by connecting the busbars and the dense buses, the connection mode is simple, the field construction amount and fault hidden danger points are greatly reduced, and the safety of the system is improved.

The invention relates to the technical field of computers, in particular to a server power supply monitoring method and device, electronic equipment and a storage medium. The method comprises the following steps: collecting an analog voltage signal output by a current server power supply, and converting the analog voltage signal into a digital voltage signal; calculating according to the digital voltage signal to obtain an output voltage parameter, comparing the output voltage parameter with a preset voltage parameter to obtain a comparison result, and judging whether the current server power supply is in a preset fault state or not according to the comparison result; and if the current server power supply is in the preset fault state, controlling a preset digital signal processing module to send a turn-off enable signal to the current server power supply so as to turn off the current server power supply. Therefore, the voltage parameters output by the server power supply are monitored and alarmed in real time, abnormal conditions can be found and processed in time, the server board burning risk caused by power supply faults is effectively avoided, and the reliability and stability of the server power supply system are improved.

The present application relates to a power failure detection circuit, the circuit comprises: a rectifying circuit for full-wave rectifying an alternating current voltage so as to obtain a first voltage; a switching circuit for converting the first voltage into a periodic voltage pulse; and a judgment circuit for providing an output signal to a fan control circuit for closing a fan when the periodic voltage pulse is not received within a preset time period, and providing the output signal to a micro-control unit for closing an electronic expansion valve. The present application also relates to a control circuit for a variable refrigerant flow VRF system.

The invention relates to the technical field of industrial automation control, in particular to a PLC (programmable logic controller) dual-redundancy power supply module supporting checking of operation quality information and a control method, comprising a master power supply, a slave power supply and matched control logic which are redundant to each other; each of the master power supply and the slave power supply comprises an AC input module, a rectification filtering module, a power conversion module, a protection module, an analog quantity acquisition module, an ADC module, an industrial grade MCU module, a nonvolatile storage module, a communication module, a state indication module and an onboard energy storage unit. The control logic comprises the steps that the PLC scans the number of modules to determine master and slave identities; the timer interrupts and triggers the ADC to collect voltage / current / temperature data, the data are stored in the SRAM after being converted, and abnormal data are stored in the nonvolatile storage unit in a classified mode; the 485 communication module responds to a PLC request to export data; and when the main power supply fails, the slave power supply is automatically switched to the main power supply and outputs 24V. According to the invention, real-time monitoring and accurate fault positioning can be realized, the reliability of the PLC system is improved, the cost is low, and the method is suitable for industrial automation scenes.

The present disclosure relates to utilizing a host failure recovery system to efficiently and accurately determine the health of host devices. For example, the host failure recovery system detects when a host server is failing by utilizing a power failure detection model that determines whether a host server is operating in a healthy power state or an unhealthy power state. In particular, the host failure recovery system utilizes a multi-layer power failure detection model that determines power-draw failure events on a host device. The failure detection model determines, with high confidence, the health of a host device based on power-draw signals and / or usage characteristics of the host device. Additionally, the host failure recovery system can initiate a quick recovery of a failing host device.

The invention discloses a driving power supply fault switching method and system, particularly relates to the technical field of power system relay protection, and is used for solving the problem that an existing relay power supply switching system causes misoperation due to common-mode interference caused by ground fault transient potential gradient. An earth screen potential gradient is collected in real time, a control cable orthogonal electric field component is measured synchronously, an electric field fiber bundle structure is reconstructed based on topology invariant distribution of a cable surface topology sequence substance, and a common-mode interference coupling coefficient is generated according to a space vector relation between an earth screen gradient direction and a reconstructed electric field; the coupling coefficient is converted into electrostrictive strain through the inverse piezoelectric effect, then a dynamic compensation voltage instruction is generated, finally, the compensation instruction is superposed to a power supply control loop to drive a standby power supply to be switched, the coupling influence of earth screen transient interference on a relay is eliminated from the physical mechanism level, the problem of misoperation is fundamentally solved, and the reliability of the relay is improved. And the reliability of power supply switching of the ultrahigh-voltage power transmission and transformation system is

The invention discloses a power supply module for a railway vehicle and a power supply system thereof. The power supply module comprises a multi-power input module, an intelligent switching module, a multi-mode rectifying and voltage-stabilizing module, an energy storage unit, a bidirectional DC / DC converter, a high-voltage direct-current bus, a traction inverter, an auxiliary inverter, a load output module and a comprehensive control module. Intelligent multi-source power supply in a real sense is realized by constructing a system architecture comprising a multi-power input module, an intelligent switching module and a comprehensive control module. The beneficial effect is that the power supply reliability and continuity are greatly improved. The system can monitor the state of each power supply in real time, automatically selects the optimal power supply or combination to supply power according to a preset strategy (such as priority, electric energy quality and cost), and seamlessly switches to the standby power supply when any power supply fails or is interrupted, so that the risk of downtime of the train auxiliary system due to the power supply problem is thoroughly avoided.