432 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 discloses a protection measurement and control device power supply fault early warning method and system and a storage medium. The invention aims to solve the problem that fault early warning and detection cannot be accurately carried out when power supply fault early warning is carried out by monitoring ripple change in the prior art. The method comprises the following steps: establishing a transition mapping relation from a normal state to a fault state according to physical parameter characteristic changes in a historical fault scene; respectively acquiring each physical parameter characteristic according to a set sampling frequency, and respectively adjusting each sampling frequency according to the sampled physical parameter characteristics; the sampled physical parameter characteristics are imported into a power supply fault early warning model, and a fault scene of the power supply of the measurement and control device is matched; and executing preset processing preparation according to the matched and predicted fault scene. And a power supply fault early warning and evaluation model is established according to the transition mapping relationship, so that the fault occurrence precursor can be found as early as possible, and the power supply fault early warning and detection cannot be accurately carried out.

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 provides a gateway power supply circuit, a circuit board and edge gateway equipment, relates to the technical field of electronic circuits, and solves the problem of poor stability of the edge gateway equipment in the related art. The gateway power supply circuit realizes real-time monitoring of a main power supply voltage, and once it is detected that the main power supply voltage exceeds a preset safety range, the edge gateway equipment can be switched off. When the power supply fails, the system immediately triggers a power supply switching mechanism and seamlessly switches to the auxiliary power supply to supply power, so that the downtime of equipment caused by power supply failure is greatly shortened, and the continuity and the stability of the system are ensured. And when the power supply is suddenly interrupted, the power supply of a key circuit can be quickly cut off, and the power supply can be used as a back-up power supply to quickly provide electric energy support through a high-performance super capacitor, so that key data is not lost, and the data safety and integrity of the system are effectively protected.

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 discloses an intelligent high-side chip diagnosis circuit and method, electronic equipment and a storage medium, and the circuit comprises an intelligent high-side driving chip which comprises an input and output pin used for controlling the working mode of the intelligent high-side driving chip; the current monitoring circuit is connected to a current monitoring pin of the intelligent high-side driving chip; and the voltage detection circuit is used for judging a load open-circuit fault when the intelligent high-side driving chip is in a non-working mode and the output level of the current monitoring pin is a low level, and judging a short-circuit to power supply fault when the output level of the current monitoring pin is a high level. The technical problem that in the prior art, a technical means for conducting fault detection on the intelligent high-side chip is lacked is solved.

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 fault information holding circuit, a fault information monitoring system and an energy storage system. The fault information holding circuit comprises a magnetic latching relay, an instruction input circuit and an energy storage device. Wherein the energy storage device is responsible for providing energy required by action for the magnetic latching relay under the condition that a target power supply loses power, the instruction input circuit is responsible for generating a control signal aiming at the magnetic latching relay according to a fault signal of the target power supply, and the magnetic latching relay is responsible for switching an opening state and a closing state according to the control signal. A long-term reliable fault signal holding function is realized by converting a power supply fault signal from an electric signal to a magnetic signal, and the upper-level sampling time is not limited, so that the acquisition requirement can be effectively met.

The invention relates to the field of fault detection, and discloses a display screen power supply fault detection method and system, which is used for solving the problem that early warning is mistakenly touched due to environment temperature change during display screen power supply fault detection, and comprises the following steps: acquiring power supply temperature data, power supply current data and power supply voltage data in real time; evaluating to obtain a temperature stability coefficient, a current stability coefficient and a voltage stability coefficient, performing first fault judgment, evaluating to obtain a power supply fault index if the first fault judgment judges that the current power supply does not have a fault, performing second fault judgment, and acquiring an environment temperature in real time if the second fault judgment judges that the current power supply has a fault; the fault threshold value is dynamically adjusted in real time according to the environment temperature, the fault adjustment threshold value is obtained, third-time fault judgment is carried out, if it is judged that the current power supply breaks down, related workers are prompted that the power supply breaks down, and the accuracy of fault detection is effectively improved.

The present invention addresses the problem of achieving quick transition to a backup state upon detection of a failure of a power supply and ensuring reliable maintenance of the backup state. In order to solve this problem, a power supply control device (1) is provided with a comparator (31), a latch circuit (32), and a microcomputer (controller 3). The comparator (31) compares a voltage of a power system, to which power of a main power supply (10) is supplied, with a threshold, detects a failure of the power system, and outputs a detection signal. The latch circuit (32) latches the detection signal and outputs a latch signal, and a specific switch (backup switch 44) that controls power supply to a load is driven by the latch signal. Upon reception of the latch signal, the microcomputer (controller 3) determines whether the detection of the failure of the power system by the comparator (31) is correct, and, when it is determined that the power system has not failed, clears the latch circuit (32) and stops the output of the latch signal.

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.

The embodiment of the invention provides a power supply control method and device for a multi-node server, the multi-node server comprises multiple groups of server nodes and electric energy suppliers which are connected in a one-to-one correspondence manner, and a power supply controller, each server node is provided with an electric energy distributor, and the method comprises the following steps: detecting a power-on signal of the multi-node server; under the condition that the power-on signal is detected, fault electric energy suppliers with power supply faults in the electric energy suppliers are detected according to the power supply information corresponding to the electric energy suppliers; and under the condition that the fault electric energy supplier is detected, controlling a target electric energy distributor deployed on a target server node corresponding to the fault electric energy supplier to supply power to the target server node. According to the method and the device, the problem of relatively low power supply efficiency of the multi-node server is solved, and the effect of improving the power supply efficiency of the multi-node server is achieved.

The invention discloses an emergency power supply allocation method and system based on current detection. The method comprises the following steps: analyzing a total average current value and a total current change interval of a circuit to be managed; dividing power supply priorities; analyzing the access time of the emergency power supply; analyzing the power supply priority of the operation equipment; analyzing the total number of equipment supplied by the emergency power supply; establishing an optimal distribution function and constraint conditions, and optimizing the power supply of the emergency power supply; the priority of the emergency power supply for supplying power to the equipment is divided, normal operation of key equipment when the main power supply breaks down or is interrupted is guaranteed, the practicability of the emergency power supply is improved, meanwhile, after the emergency power supply is connected, power supply of the emergency power supply is optimized, the stability and safety of a circuit when the emergency power supply is connected are guaranteed, and the safety of the emergency power supply is improved. Moreover, the power distribution of the emergency power supply is more reasonable, and the maximum utilization of the limited capacity is realized. The method has the outstanding advantages of high efficiency, large application range, high reliability and the like.

The invention discloses an intelligent scheduling system for a distributed power supply coordination device, and relates to the technical field of power system automation. The distributed power supply fault early warning module is used for processing according to the power supply working state data to obtain a working state abnormal evaluation value of each distributed power supply unit, and performing fault early warning according to the working state abnormal evaluation value of each distributed power supply unit; the distributed power supply data processing module is used for performing comprehensive analysis according to the power supply energy management data, the environment data and the working state abnormity evaluation value of each distributed power supply unit to obtain an operation efficiency evaluation index of each distributed power supply unit; and the distributed power supply intelligent scheduling module is used for performing intelligent scheduling on each distributed power supply unit according to the operation efficiency evaluation index of each distributed power supply unit.

The invention discloses a train compartment illumination driving power supply fault control method and circuit and an illumination system. The method comprises the steps of obtaining output voltage values of at least two paths of driving power supplies; when it is detected that the output voltage value is abnormal, the corresponding driving power supply is restarted, and whether the output voltage value is abnormal or not is further detected; after the driving power supply is restarted, when the output voltage value is still abnormal, a fault signal is output to the upper computer; when it is detected that the output voltage value is normal, obtaining output current values of at least two paths of driving power supplies; when the output current value is abnormal, the corresponding driving power supply is restarted, and whether the output current value is abnormal or not is further detected; and when the driving power supply is restarted and the output current value is still abnormal, outputting a fault signal to the upper computer. According to the invention, the health condition of the train compartment lighting system can be monitored in real time, soft faults can be self-repaired in real time, and fault codes can be output to an upper computer, so that the faults of a driving power supply can be processed in time, and the safety and the reliability are improved.

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.

To enable quick detection of occurrence of power failure so as to contribute to cost reduction and suppression of increase in size of a power supply module.SOLUTION: A robot controller is provided with a power failure monitoring circuit 68 for monitoring a power failure. The power failure monitoring circuit 68 includes: a rectifier 72 that rectifies power (AC) supplied from an external power supply to input terminals 71a and 71b of the power failure monitoring circuit 68; a photocoupler 73 that converts the power rectified by the rectifier 72 into light to generate a pulse signal oscillating at a fixed period; and a monitoring signal generator 74 that generates a power failure monitoring signal on the basis of the pulse signal generated by the photocoupler 73. When a time that the pulse signal is at a LOW level reaches a determination reference time, the monitoring signal generator 74 outputs, to a digital port of a drive control unit 62, as the power failure monitoring signal, a power failure detection signal indicating occurrence of the power failure. A CPU of the drive control unit 62 executes power failure addressing processing on the basis of reception of the power failure detection signal.SELECTED DRAWING: Figure 6

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 embodiment of the invention provides a power supply system and a control method and device of the power supply system. The method comprises the steps that a conversion circuit is adopted to control a first direct-current power supply to supply power to the power supply system; and controlling the second direct-current power supply to supply power to the power supply system by adopting the conversion circuit in response to the first direct-current power supply outage. Through the method and the device, the problems of communication interruption and data loss caused by PSU power downtime and server interruption due to the fact that single-path HVDC input cannot completely achieve safe and reliable power supply and extreme conditions such as power failure of the input in the prior art are solved, real-time monitoring of the power supply state and automatic switching under abnormal conditions are realized, and the power supply reliability is improved. According to the invention, uninterrupted operation of key occasions such as a server or a data center is ensured, and the effects of remarkably improving the stability and reliability of the power supply, greatly reducing the system interruption time caused by power supply faults, and improving the continuity of key services and the security of data are achieved.