264 results about "Power supply failure" patented technology

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 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 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 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 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 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 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 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.

The invention belongs to the technical field of power supply and distribution systems, and discloses a direct current power supply and distribution system and method of a nuclear power station facing a computing power data center, and the system comprises a direct current power supply and distribution architecture of a main power supply system, a medium-voltage direct current system and a low-voltage direct current system. Alternating current of a main power supply system is converted into medium-voltage direct current to be supplied to a medium-voltage direct current system through a first voltage conversion module, then the medium-voltage direct current is converted into low-voltage direct current to be supplied to a low-voltage direct current system through a second voltage conversion module, and the medium-voltage direct current system directly supplies power to a low-voltage system when a main power supply fails. And when the main power supply and the medium-voltage system both fail, the low-voltage system operates independently to meet the load requirement. By adopting the system, the equipment investment and the operation cost are obviously reduced, the electric energy transmission efficiency and the power supply reliability are improved, the potential safety hazard is eliminated, and the efficient cooperative power supply of the station power of the nuclear power station and the load of the data center is realized.

The invention discloses an active intelligent lock system and a control method thereof, and belongs to Internet of Things safety equipment. The active intelligent lock system is provided with an environment energy collection module, a dual-channel power management module, a dynamic power consumption controller, a multi-mode authentication module, an authorization authentication module, a communication module and a master control MCU (Microprogrammed Control Unit), the environment energy collection module and the dual-channel power management module can improve the power supply endurance of the active intelligent lock system and the safety emergency processing of power supply faults, and the dynamic power consumption controller can provide three different power consumption modes to optimize the dynamic energy consumption in multiple use scenes, so that the utilization rate of electric energy is improved; the multi-mode authentication module and the authorization authentication module provide a multi-person combined unlocking mechanism, the industrial-grade centralized supervision requirement and intelligent management are met, and the use safety and operation convenience of the active intelligent lock system are effectively improved.

The application discloses an active power filter control method for preventing resonance, and relates to the technical field of power quality control.The method injects a harmonic current with a frequency of a pre-judged harmonic frequency into a power supply circuit, compares the change in the grid-side current and the load-side current before and after the injection, obtains a sensitive frequency point, separates the harmonic component corresponding to the sensitive frequency point from the harmonic components corresponding to other frequencies, and respectively generates compensation currents, wherein the harmonic component corresponding to the sensitive frequency point is adjusted through a feedback coefficient, different compensation currents are superimposed to obtain a comprehensive compensation current, the comprehensive compensation current is used to offset the load harmonic current, and the grid-side current is ensured to be undistorted.The technical scheme in the application can realize harmonic impedance adjustment, effectively prevent harmonic amplification, avoid passive element burning or power supply failure, and enhance the safety and reliability of power supply.

The embodiment of the invention provides an AC input PFD circuit and an electronic device with an AC input power supply. The AC input PFD circuit includes at least two AC input PFD sub-circuits having different detection thresholds corresponding to different time delays, each AC input PFD sub-circuit being provided with a detection threshold and configured to detect a DC bus voltage converted from an AC input power source and to detect a DC bus voltage converted from the AC input power source when the AC input power source fails and the DC bus voltage drops to the detection threshold. A PFD signal indicative of a failure of the AC input power supply is output after the corresponding time delay. According to the technical scheme, the application range of the AC input PFD circuit can be expanded.

The invention relates to a concurrent power-on logic sequencing networking method for an emergency lighting wireless system, and the method comprises the steps: enabling all emergency lighting nodes to be started concurrently and reading preset floor numbers and network roles under the triggering conditions that a main power supply fault is monitored and a standby battery is switched to supply power; calculating logic delay time according to the floor number and the network role, wherein the time is silent waiting time before the node executes a networking action; and the node keeps a silent receiving state in the logic delay time period, and executes a network networking action corresponding to the role after the delay is ended. According to the method, physical concurrent power-on is converted into ordered access on the time axis, so that channel congestion and signal collision are effectively avoided, and rapidity and reliability of network construction in an emergency scene are guaranteed.

The application discloses a power supply fault detection circuit of an energy storage battery. The power supply fault detection circuit comprises a direct-current power supply, a first resistor, a second resistor, a third resistor and a control device; the direct-current power supply is used for providing a detection power supply; the first resistor and the second resistor are connected in series between the direct-current power supply and a ground end, a connection point of the first resistor and the second resistor is connected with one end of the third resistor, and the other end of the third resistor is used for connecting a power supply end; the control device is provided with a detection end and a first control end, the detection end is connected with the connection point of the first resistor and the second resistor, and the first control end is used for connecting a switching device to control the on-off state of the switching device; and the control device is used for generating a first switching control signal according to the relative relationship between a detection voltage inputted by the detection end and a preset range, so as to control the on-off state of the switching device. In the case of connecting a load, the detection circuit provided by the application will not fail, and the reliability of the energy storage battery fault detection can be improved.

The utility model discloses an emergency power supply switching device and electronic equipment. The emergency power supply switching device comprises an input power supply switching module and a relay contact switching module, wherein the input power supply switching module outputs a first power supply and outputs a second power supply when a second power supply input end does not receive the first power supply and receives the second power supply; when the relay contact switching module does not receive the first power supply, the third power supply output end is switched to be communicated with the second power supply and outputs the second power supply to the input power supply switching module. According to the technical scheme, through the arrangement of the input power supply switching module and the relay contact switching module, rapid switching between the main power supply and the emergency power supply is achieved; and the elevator can be timely connected to the emergency power supply when the main power supply fails, so that the safety and the reliability of the system are improved.

This application belongs to the field of power electronics and automatic control technology, and relates to a power supply smooth switching control method for suppressing DC bus voltage surges. It solves the problem of DC bus voltage surges caused by potential changes during primary / standby power supply switching, including: dynamically matching the standby power supply output to the primary power supply voltage and reserving a voltage difference margin through voltage closed-loop feedback; initiating switching when a primary power supply fault is detected or the bus voltage drop rate exceeds a threshold; utilizing controlled current injection into the MOSFET gate to bring it into the Miller plateau region and allowing it to remain in the linear operating region for a preset transition period; controlling the MOSFET drain-source equivalent resistance to continuously decrease according to an S-shaped function to absorb transient energy; and locking the fully conducting state to complete seamless switching when the drain-source voltage difference approaches zero. This method effectively eliminates high-frequency oscillations, achieves microsecond-level potential transitions, significantly improves system reliability and response speed, and is suitable for high-reliability power supply scenarios with stringent "zero-inductive switching" requirements.

A power supply system according to the present invention comprises a power supply terminal, a load terminal, and a backup power supply unit. The power supply terminal is connected to a power supply. The load terminal is connected to a load. The backup power supply unit is connected to a power supply path. The power supply path connects the power supply terminal and the load terminal. The backup power supply unit includes a power storage unit and a power conversion unit. The power conversion unit is connected between the power storage unit and the power supply path. When the power supply has failed, the power conversion unit supplies regenerative power generated by the load via the power conversion unit to the power storage unit.

A network type power supply fault current suppression method based on additional virtual impedance and power angle control, comprising: if it is judged that the network type power supply with virtual synchronous generator (VSG) as the main structure is below the threshold after the fault occurs, the reactive power reference value is calculated and adjusted according to the drop degree to meet the low voltage ride through condition; the difference between the VSG output voltage and the grid voltage and the maximum bearing current of the inverter are used to quantitatively calculate the virtual impedance required for current limiting; the active power reference value is modified by using the reactive loop reference voltage before and after the fault to maintain the VSG power angle stability; the mathematical model of the inverter in the VSG is constructed, the virtual impedance is added to the control loop by using the coordinate transformation and the grid side current transformation, and the output drive signal is controlled by inputting the voltage modulation into the SVPWM, so that the inverter completes the overcurrent limiting. The application solves the problem that the output current of the network type new power system increases too fast to cause system instability when the fault occurs.

The invention discloses an inverter power supply fault joint protection circuit. A plurality of MOS tubes (S1, S2, S3 and S4) form a full-bridge conversion circuit, a current sampling resistor (RS1) is connected in series between the MOS tubes S1 and S2, a current sampling resistor (RS2) is connected in series between the MOS tube S2 and an input negative electrode, a current sampling resistor (RS3) is connected in series between the MOS tube S3 and S4, and a current sampling resistor (RS4) is connected in series between the MOS tube S4 and an output negative electrode. According to the invention, in order to realize quick response, signal processing and triggering, analog circuit construction is adopted, and functions of overvoltage and overcurrent flexible setting, sound and light alarm, fault display and the like are realized through software.

A hand-dialing double-color-temperature constant-power switch switching device for a lamp strip comprises a power supply, a control circuit and an LED load, the control circuit is connected between the power supply and the LED load, and the control circuit comprises a two-pole three-gear toggle switch, a plurality of balance diodes and a plurality of balance resistors. The LED load comprises a first LED lamp set and a second LED lamp set which are connected in parallel, the toggle switch controls the first LED lamp set and the second LED lamp set to be connected to different switch contacts, and the function of keeping input power constant in three different color temperatures is achieved by controlling combination of the balance diode and the balance resistor. According to the technical scheme, the problems of LED load over-temperature, advanced aging damage and advanced failure of the power supply due to overload are effectively avoided, the service life of the product is prolonged, in addition, switching of three color temperatures can be realized without reducing the load power or increasing the power of the power supply, and the application range of the product is expanded.