2399 results about "Dc source" patented technology

The invention relates to the technical field of direct-current power supply fault diagnosis, in particular to a fault self-diagnosis modular direct-current power supply system, which is characterized in that a failure mechanism dynamic modeling unit constructs a multi-stress coupling degradation mapping library, adopts a degradation mechanism decoupling algorithm to separate and superpose failure effects and generates a dynamic degradation model; the early degradation capture unit deploys a high-frequency wide-domain sampling circuit and a noise suppression signal chain, combines time-frequency domain joint feature extraction and separates degradation feature signals from background noise, and the self-adaptive life prediction unit adopts a long short-term memory network and random forest fusion algorithm to dynamically correct parameters and output residual life probability distribution. The intelligent fault judgment unit realizes progressive diagnosis through a hierarchical threshold decision mechanism, and the health management cooperative execution unit triggers a pre-maintenance strategy, executes power flexible derating, redundancy switching or directional fusing isolation, and improves the reliability of the system.

The invention discloses an output voltage detection method and system based on an aviation power supply, and relates to the technical field of aviation power supply voltage detection. A differential voltage sensor is connected to the output end of an aviation power supply, a high-frequency suppression capacitor is connected in parallel, the sampling rate of 20-50 times of the working frequency is set according to the type of the power supply, and the signals are collected and converted into analog voltage signals; the analog signal is subjected to two-stage filtering, is amplified to 0-5V through an instrument amplifier, and is converted into a digital voltage sequence through a 16-bit ADC (Analog to Digital Converter); calculating AC power supply effective value, peak value and other parameters, DC power supply average value, ripple coefficient and other parameters; comparing the characteristic parameters with a preset threshold value, determining that the characteristic parameters exceed the threshold value and recording related information; and a detection result is transmitted to a monitoring terminal through an RS485, data is locally stored, and a switching value is output to an alarm device when the data is abnormal. The method adapts to aviation power supply load fluctuation and environment temperature change, detection precision is high, data transmission and storage are safe, abnormity is accurately identified and early warning is carried out in advance, and aviation power supply operation and maintenance reliability and efficiency are improved.

The invention relates to the technical field of radio frequency power matching, and discloses a direct-current radio frequency hybrid high-power network matching optimization method. The method comprises the following steps: collecting current fluctuation data of a direct-current power supply module and power reflection data of a radio-frequency emission module, and generating a hybrid network impedance characteristic set; calling a power grid topology analysis engine to analyze the set to obtain an impedance track characteristic matrix; performing dynamic trajectory optimization on the matrix based on a preset frequency domain stability constraint rule to generate corrected impedance trajectory distribution; fusing the corrected track distribution and the radio frequency load dynamic response data, and constructing multi-band matching topological feature representation; performing parameter decoupling on the topological feature representation through a nonlinear matching mapping engine to generate an optimal matching parameter configuration table; and finally adjusting the voltage stabilization coefficient of the DC power supply module and the tuning capacitance value of the radio frequency emission module according to the configuration table. According to the method, efficient matching optimization of the hybrid network is realized, and the stability and adaptability of system operation are improved.

The utility model relates to the technical field of energy storage power supplies, and mainly provides a direct-current power supply fault latch circuit and an energy storage system, the circuit comprises a switch module connected with a battery and a direct-current power supply, a latch module connected with the switch module, and a sampling resistor connected with the latch module, and the sampling resistor is also connected with the negative electrode of the battery and the negative electrode of the direct-current power supply. The switch module is also used for receiving the driving signal. The sampling resistor outputs a sampling voltage to the latch module according to the output current of the cathode of the DC power supply. The latch module is used for controlling the switch module to start working according to the driving signal when the sampling voltage is smaller than the preset voltage so as to output the power supply voltage of the battery to the direct-current power supply; and when the sampling voltage is greater than the preset voltage, it is considered that an overcurrent short circuit fault occurs, and at the moment, a turn-off signal is continuously output to the switch module to close the switch module and lock the closed state, so that output of the power supply voltage is stopped, and the service life of the energy storage system is prolonged while the energy storage system is protected.

The invention discloses a POL power supply automatic test method based on modular design, and belongs to the technical field of power supply test. The method comprises the following steps: firstly, under the control of an upper computer, automatically reading POL power supply basic parameters including key characteristic parameters such as input / output voltage, rated current and frequency from a preset Excel table, and establishing a judgment reference for testing; then, instrument initialization is completed, communication connection with test equipment such as an oscilloscope, an electronic load and a direct-current power supply is established, and configuration of initialization function parameters is completed; then, executing a measurement task of each core parameter of the POL power supply to be tested, and in the test process, executing a parallel measurement management mechanism, namely configuring each instrument parameter and channel state in real time according to a specific test item, and triggering a retry or interrupt logic under the conditions of communication abnormality, data timeout and the like until the test recovers a running state; and finally, after the test is completed, performing Excel storage and interaction on the standardized test data and the waveform screenshot, and finally safely exiting. According to the POL power supply automatic test method based on the modular design, the whole test process is divided into a plurality of serial or parallel function processing units such as parameter reading, instrument initialization, test execution and test management, data storage and interaction and the like, and high efficiency and usability of a test system are achieved.

The utility model relates to a rear-phase-cut single-live-wire type wall light modulator, which comprises an MOS (Metal Oxide Semiconductor) tube switch loop unit, a singlechip control unit and a direct-current power supply unit, the MOS tube switch loop unit comprises a wiring terminal J2 connected with an MOS tube Q1, a grid electrode of the MOS tube Q1 is connected with four resistors in series in sequence and then is connected with an MOS tube Q2, a drain electrode of the MOS tube Q2 is connected with a diode D2, the diode D2 is connected with a diode D1, a fixed end contact of a single-pole double-throw switch is connected with the MOS tube Q2, and two movable end contacts of the single-pole double-throw switch are connected with the wiring terminal J1 and the wiring terminal J3 respectively; the direct-current power supply unit comprises an alternating-current voltage waveform acquisition circuit, a direct-current voltage drop circuit, an overcurrent protection circuit and a filtering voltage stabilizing circuit; according to the single-chip microcomputer control unit, a linear sliding potentiometer is connected with the PC2 end of a single-chip microcomputer after being connected with a resistor in series, the linear sliding potentiometer and a rotary potentiometer are sequentially connected between the output end of the direct-current power supply unit and the ground in series, a triode Q6 is connected with a triode Q5 and then connected with the collector electrode of a triode Q7, and the base electrode of the triode Q7 is connected with the PA6 end of the single-chip microcomputer after being connected with a resistor in series.

The invention provides an energy storage and discharge circuit, and relates to the technical field of energy storage and discharge, and the circuit comprises a power supply input interface, a first current limiting assembly, a first switching device, a first electric control device, a start-stop control transmission device, and an energy storage assembly. The start-stop control transmission device is connected with the control end of the first switching device; a first port of the first switching device is externally connected with a direct-current power supply, and an output end is connected with a control system of the first electric control device; the power supply input interface is connected with an input end of the first current limiting assembly, an output end of the first current limiting assembly is connected with a first port of a controlled system of the first electric control device, and a second port of the controlled system of the first electric control device is connected with a port of the energy storage assembly; according to the invention, the sudden change of the voltage at the two ends of the capacitor when the capacitor is directly subjected to energy storage in the energy storage discharge circuit can be avoided, the capacitor is prevented from being damaged, and the reliability of the energy storage discharge circuit is improved.

The invention relates to the technical field of high-voltage electric appliance detection, in particular to a device and method for detecting the vacuum degree of a vacuum arc-extinguishing chamber, and the method comprises the steps: arranging a field emission cathode on one metal end cover of the vacuum arc-extinguishing chamber; an anode is arranged on the metal shielding cover close to the field emission cathode in the vacuum arc-extinguishing chamber; the high-voltage direct-current power supply is connected to the field emission cathode and the anode and is used for applying voltage to the electrodes so as to drive the field emission cathode to emit electron beams to impact the anode; the X-ray energy spectrum detector directly faces the anode, the X-ray energy spectrum detector is used for measuring bremsstrahlung X-ray energy spectrum generated when the electron beam impacts the anode, an electron emission source is actively arranged in the arc extinguish chamber, and the distribution of the X-ray energy spectrum generated by the electron emission source is measured. And high signal-to-noise ratio, high-precision and high-sensitivity vacuum degree quantitative detection is realized by utilizing the strong correlation between the energy spectrum form and the internal gas pressure.

The invention discloses a carbon felt electrode for a zinc-bromine flow battery as well as a preparation method and application, and belongs to the technical field of zinc-bromine flow battery production, the method comprises the following steps: immersing a carbon felt into an acid solution for chemical etching, etching uniform grooves in the carbon fiber surface of the carbon felt, cleaning and drying to obtain a pretreated carbon felt; the preparation method comprises the following steps: dissolving tin salt and nickel salt in deionized water, and adding a hydrolysis inhibitor to obtain a precursor solution; and immersing the pretreated carbon felt into the precursor solution, carrying out electro-deposition under constant current by adopting a direct-current power supply by taking the re-selected untreated carbon felt as a counter electrode, washing the pretreated carbon felt subjected to electro-deposition with water, and drying for the second time to obtain the carbon felt electrode for the zinc-bromine flow battery. By utilizing the zinc affinity of Sn and Ni, zinc is preferentially deposited on Sn and Ni sites of the carbon felt electrode, the deposition depth is obviously enlarged, the zinc deposition space is optimized, the zinc deposition area capacity is effectively improved, and the problem that the surface capacity of the carbon felt electrode is limited is solved.

The application relates to a power system for an explosion-proof carrier, and belongs to the field of power system design. The system comprises a central control explosion-proof box, a battery heating module, a DC 220V direct current power supply, an explosion-proof battery pack, an explosion-proof motor driver, an explosion-proof display and a charger. The application effectively solves the problems of low-temperature charging difficulty, short endurance time, poor battery pack data acquisition and equalization management effect and improper control strategy of the existing carrier, and realizes advanced reliability, controllable risk and long service life.

The invention discloses a multi-port DAB energy storage system directly connected with an elevator frequency converter bus and a cooperative control method of the multi-port DAB energy storage system, and is suitable for an elevator frequency converter direct-current bus direct-connection scene. Aiming at the defects in the aspects of elevator bus transient support, multi-branch extension and parallel operation safety access in the prior art, at least two DAB power branches are adopted, the low-voltage sides of the DAB power branches are connected into the same low-voltage direct-current source in parallel to realize current expansion, and the high-voltage sides of the DAB power branches are connected to a VFD direct-current bus through a parallel operation access switch to realize voltage expansion after being connected in series and laminated; the controller adopts fixed frequency phase shift control, and combines a two-line parallel operation or power-off time sequence and a zero-crossing residence strategy; through multi-branch phase interleaving, mutual exclusion amplitude limiting constraint, ZVS guarantee and a fault striding linkage mechanism, branch power balance, circulating current suppression and bus stable support are realized. According to the invention, the millisecond voltage of the bus can be efficiently suppressed, the response speed, the operation efficiency and the reliability of the system are improved, and the core requirements of elevator bus energy recovery and transient stability control are met.

The invention provides a charging system with high-voltage protection, which relates to the technical field of elevator emergency power supply and comprises a transformer, a voltage stabilizing circuit, a sampling circuit, an on-off circuit, a surge protection circuit, a constant current and voltage stabilizing circuit and a control circuit. The transformer reduces commercial power high voltage to low voltage; the voltage stabilizing circuit provides a stable direct-current power supply for the sampling and control circuit; the sampling circuit is used for conditioning the AC voltage and outputting a feedback signal; and the control circuit performs mode analysis by utilizing a pre-judgment algorithm according to the feedback signal so as to control the on-off circuit to cut off the mains supply input or switch the output mode of the constant current and voltage stabilizing circuit. Through an intelligent protection mechanism comprising sampling, control and on-off circuits, the device can be suitable for single-phase electric equipment, and quick and accurate response to abnormal high voltage is realized. And the transformer is adopted for voltage conversion and isolation, and the surge protection circuit and the on-off circuit are combined, so that the protection performance is ensured, and the overall cost and size of the system are effectively controlled.

Bidirectional isolated universal topology (BIUT) high power DC-DC converter assemblies and systems balance voltages and control currents between high power DC sources and high power DC loads where at least some of the high power DC sources are alternative energy or renewable energy power supplies and high power DC loads associated with alternative energy or renewable energy. The BIUT high power DC-DC converter assemblies and systems are capable of reversing current flow direction where loads become the sources and sources become the load in DC power systems where the supplies and loads are all connected to a common DC voltage bus.

A pulse generator is disclosed. The pulse generator includes a DC source; a plurality of switches, a transformer; and a pulsing output. The pulse generator can be coupled with a plasma chamber. The pulsing output outputs high voltage pulses having a peak-to-peak voltage greater than 1 kV and a voltage portion between consecutive high voltage bipolar pulses that has a negative slope that substantially offsets the voltage reduction on a wafer within a plasma chamber due to an ion current. The resulting voltage at the wafer may be substantially flat between consecutive pulses.

The application discloses a kind of excitation control circuit with multiple de-excitation loop for aviation three-stage power generation system, including: resonant de-excitation capacitor C2, de-excitation switch S1, de-excitation switch S2, anti-reverse diode D1, freewheeling diode D2, freewheeling diode D3, transient voltage suppression diode D4, voltage regulating MOS tube Q1, voltage regulating MOS tube Q2, de-excitation resistor R1 and excitation winding L;Wherein, the positive terminal of DC power supply DC+ is connected to the anode of anti-reverse diode D1, the cathode of anti-reverse diode D1 is sequentially connected to the negative terminal of DC power supply DC- by de-excitation switch S1 and resonant de-excitation capacitor C2;The cathode of anti-reverse diode D1 is respectively connected to the drain of voltage regulating MOS tube Q1, the negative electrode of freewheeling diode D3 and one end of de-excitation switch S2, the source of voltage regulating MOS tube Q1 is respectively connected to the positive electrode F+ of excitation winding L, the negative electrode of freewheeling diode D2;The anode of freewheeling diode D3 is respectively connected to the negative electrode F- of excitation winding L, the drain of voltage regulating MOS tube Q2 and the negative electrode of transient voltage suppression diode D4, the other end of de-excitation switch S2 is respectively connected to the positive electrode of transient voltage suppression diode D4 and one end of de-excitation resistor R1;The anode of freewheeling diode D2, the source of voltage regulating MOS tube Q2 and the other end of de-excitation resistor R1 are respectively connected to the negative terminal of DC power supply DC-.The technical scheme of the application solves the problem that the freewheeling diode added between excitation voltages in the existing excitation circuit cannot consume the energy of magnetic field, and the de-excitation speed is slow.

An electric vehicle (EV) charging station for fast charging (e.g. 5 to 15 minutes) an electric vehicle (EV). The EV charging station can be configured to charge multiple EVs and multiple conventional vehicles at the same time. The EV charging station can include a power source, an electric reservoir receiving power from the power source, an AC to DC power converter for receiving AC power from the power source and converting the AC power to DC power for supplying DC power to the electric reservoir, an EV charger receiving DC power from the electric reservoir; and a first DC to DC converter receiving DC power from the electrical reservoir and converting the DC power to DC power suitable for charging the electrical vehicle.

The invention discloses a hybrid parallel direct-current power supply system, a charge and discharge control method and a medium, and the system comprises the hybrid parallel direct-current power supply system which comprises a direct-current bus; the power conversion module comprises two groups of three-port converters and a plurality of groups of two-port converters, the three-port converters are connected in parallel with super capacitor banks and a storage battery pack, the storage battery pack comprises a plurality of storage batteries which are connected in series, the two super capacitor banks are connected in series and then connected with the direct current bus, and the two-port converters are connected with the storage battery pack; a three-port converter, wherein the two-port converter is electrically connected with the direct current bus; and the charging and discharging control module is electrically connected with the battery conversion module so as to control the battery conversion module to realize a constant-current, constant-voltage and floating-charge staged charging strategy and an anti-interference discharging strategy. According to the invention, the complementation of the short-time / instantaneous power fluctuation of the super-capacitor compensation direct-current bus and the long-time power fluctuation of the storage battery compensation direct-current bus is realized.

The invention provides a non-isolated LED power supply minuteness-removing turn-off circuit, which comprises a second power supply processing module, a minuteness-removing turn-off module and an LED lamp module, and is characterized in that the second power supply processing module is used for converting a high-voltage direct-current power supply into an LED lamp module working power supply; the micro-brightness removal turn-off module is arranged between the output end of the second power supply processing module and the LED lamp module and comprises a direct-current impedance conversion unit, an alternating-current impedance conversion unit and a switching tube, and the switching tube is arranged on a direct-current loop; and the control unit of the second power supply processing module reduces the DC voltage and the non-isolated AC induced voltage to be below the set voltage through the switching signal and the DC impedance conversion unit and the combined action of the switching signal and the AC impedance conversion unit, thereby realizing the minuteness-removing turn-off of the LED lamp module. According to the invention, contactless switch control can be realized, circuit loss is reduced, and working noise is reduced.

The invention relates to a cyclic aging test device for a power semiconductor device with a three-level three-phase bridge twin-dragging structure, which comprises a three-phase bridge test unit, a host control board and a slave control board, and is characterized in that the three-phase bridge test unit comprises a host three-phase bridge, a slave three-phase bridge and a three-phase inductive load with the same three-phase bridge structure; the three-phase bridge is connected with a power semiconductor device; the direct current ends of the host three-phase bridge and the slave three-phase bridge are connected in parallel, and the same group of direct current power supply Vdc supplies power to the host three-phase bridge and the slave three-phase bridge; the alternating current ends of the host three-phase bridge and the slave three-phase bridge are interconnected through the three-phase inductive load to form a twin-trawling structure; the slave control panel controls the voltage output of the three-phase bridge arm as the target of the current closed-loop control of the host control panel, and the host control panel simulates the actual working state of the power semiconductor device by adjusting a control strategy. The device has the beneficial effects that various real working conditions are simulated, and the cyclic aging test of the system-level AC type power semiconductor device is realized.

The invention discloses an electric aircraft high-voltage power distribution control method and system, a medium and a product thereof, and relates to the technical field of high-voltage power distribution, and the method comprises the steps: receiving a DC power supply outputted by a power battery pack, and achieving the power-on soft start through a pre-charging loop; distributing electric energy to a motor controller, an auxiliary power supply module, an air conditioning system and an electric heating system through a power distribution level according to the load priority; the power distribution stage integrates multiple solid-state relays or contactors to form load branches. An independent protection unit is configured for each load branch at a load output stage, and the independent protection units monitor voltage, current and temperature parameters in real time and execute fault isolation operation when the monitored parameters exceed corresponding preset thresholds. According to the invention, high-voltage power distribution control with load priority scheduling and branch-level rapid fault isolation is realized under the condition of high power density.

The invention discloses a plasma processing device and a working method thereof, and the plasma processing device comprises a vacuum reaction chamber which is internally provided with a lower electrode assembly; the direct current power supply and the first bias radio frequency power supply are electrically connected with the lower electrode assembly; the controller is used for controlling the direct-current power supply to provide a first pulse voltage for the lower electrode assembly, controlling the first bias radio frequency power supply to provide a first bias radio frequency voltage for the lower electrode assembly, and adjusting the phase difference between the first pulse voltage and the first bias radio frequency voltage to change the voltage of a plasma sheath layer on the surface of the substrate, the frequency of the first pulse voltage is consistent with the frequency of the first bias radio frequency voltage. The device has the advantages that the direct-current power supply, the first bias radio-frequency power supply and the controller are combined, the frequencies of voltages output by the direct-current power supply, the first bias radio-frequency power supply and the controller are controlled to be consistent through the controller, richer bias voltage waveforms are obtained under the condition that clutters are not introduced, and then accurate control over the substrate etching process is achieved.

An illumination device and method are provided for controlling light-emitting diodes (LEDs). The LEDs (specifically, the LED loads) are controlled, e.g., brightness and color of the LED loads, independent of a phase-cut dimmer applied to the AC mains feeding a DC power supply. The power supply is active dependent upon the duration of a conduction angle supplied from the dimmer. The power supply, however, produces drive currents that are independent from the conduction angle by using a two-stage power supply and a relatively slow and fast control loops that are controlled through a microprocessor-based control circuit. Parameters stored in the control circuit are drawn by the microprocessor to control the two-stage power supply to produce the drive currents independent and decoupled from the conduction angle yet dependent on the controller parameters.

The invention discloses a grid-forming type bipolar photovoltaic power generation system and a control method, a bipolar photovoltaic converter, namely a DC / DC converter and a DC / AC inverter, is configured between a photovoltaic DC power supply and a micro-grid bus, and a three-phase LC filter is configured between the output side of the inverter and the micro-grid bus; calculating a photovoltaic voltage reference value based on the photovoltaic voltage, the photovoltaic current and the DC voltage output by the converter by using a DC voltage-output power droop control structure so as to generate a PWM signal for controlling the converter; determining a vector angle of the inverter based on the DC voltage and rated parameters of the inverter, calculating reactive power by combining the voltage and current of the micro-grid bus, and further obtaining an output voltage amplitude of the inverter through a power-voltage droop equation; and generating a three-phase voltage control signal according to the voltage amplitude, the vector angle and the inductive current of the filter, and further generating an SVPWM signal for controlling an inverter, thereby realizing the target of automatically distributing the load capacity.

The invention belongs to the technical field of seabed hole domain electromagnetic detection, and relates to a hybrid multi-frequency reactive compensation method for a seabed electromagnetic emission system, which comprises the following steps of: designing a topological structure of a hybrid multi-frequency reactive compensation system according to an impedance matching requirement of a low-frequency emission frequency band of the seabed electromagnetic emission system; deducing a compensation strategy and an implementation method of the hybrid multi-frequency reactive power compensation system based on the multi-frequency reactive power compensation requirement of the load; and analyzing the influence of the reactive compensation combination proportion of the impedance matching part of the passive TCC and the impedance matching part of the active ICC on the requirement of the direct-current power supply voltage VICC, and carrying out parameter design of the passive TCC and the active ICC. According to the hybrid multi-frequency reactive compensation technology, the single-frequency reactive compensation capability is further expanded into self-adaptive dynamic compensation of multi-frequency reactive power in a wide frequency band; the additionally introduced active impedance matching part effectively improves the multi-frequency impedance matching precision, and the frequency spectrum energy utilization rate of multi-frequency transmitting signals is further improved in a low-frequency transmitting frequency band.

The invention relates to a mobile storage and charging all-in-one machine and an application method, the mobile storage and charging all-in-one machine comprises a storage and charging machine and a mobile station, the storage and charging machine is internally provided with an energy storage bin, an AC power distribution bin, a DC power distribution bin and an energy management system, and the energy storage bin is internally provided with a liquid-cooled battery pack; a PCS and an alternating current conversion device are arranged in the alternating current distribution bin, a power conversion unit and a direct current conversion device are arranged in the direct current distribution bin, a charging device is arranged on the outer wall of the direct current distribution bin, and the storage and charging machine is detachably installed on the moving table. The energy management system is in signal connection with the liquid-cooled battery pack, the PCS, the power conversion unit, the direct-current conversion equipment and the mobile station; the charging device outputs direct current outwards or receives an external direct current power supply to charge the liquid-cooled battery pack, and the alternating current conversion device outputs alternating current outwards or receives an external alternating current power supply to charge the liquid-cooled battery pack. The invention aims to provide the mobile storage and charging all-in-one machine which is low in cost, wide in application range, sufficient in electric energy, high in maneuverability, intelligent and capable of being remotely regulated and controlled and the application method.

The invention discloses a method for searching a ground fault point of a low-voltage cable by using a safe direct-current power supply, which is suitable for searching the ground fault point of the low-voltage cable of a preset street lamp along the street, comprises a plurality of lamp poles which are distributed at intervals, and is characterized in that a PE (Poly Ethylene) wire of the low-voltage cable is connected with a ground terminal of a control cabinet; a positive wire outlet end provided with a safe direct-current power supply is connected with a direct-current 0.5 A fuse in series, the other end of the fuse is respectively clamped on A, B, C and N phases of a cable, a negative wire outlet end is connected with an mA meter in series, the other end of the mA meter is clamped on a cable head of a PE (Poly Ethylene) wire, when a certain phase of cable is grounded and short-circuited, the mA meter is equivalent to a grounding resistor which is connected in series in a loop, and the direct current of the loop is measured, so that the grounding short circuit of the cable is measured. And searching positions of a fault phase and a ground fault point. The invention discloses a method for safely, quickly and reliably searching a grounding fault point of a low-voltage cable.

The invention belongs to the technical field of direct-current power supply system management, and provides an independent management method for a split type parallel direct-current power supply lithium battery of bidirectional DC / DC conversion, a direct-current power supply is of a movable structure, and the system architecture of the direct-current power supply comprises a central controller and a plurality of parallel power sub-modules, the method specifically comprises the following steps: a central controller identifies a newly added power sub-module and completes system architecture configuration based on acquired state parameters of existing power sub-modules and main bus operation state data; the central controller dynamically selects a control mode and generates an execution instruction of charging and discharging power based on the number and state parameters of the power sub-modules, and controls the charging and discharging of each power sub-module; on the premise of ensuring uninterrupted power supply of the direct-current power supply, the central controller controls the lithium battery pack in the power sub-module to perform online capacity checking or activation operation. According to the invention, plug-and-play and independent control of the power sub-modules are realized through modular design.

The invention belongs to the technical field of superconducting cable operation monitoring, and particularly discloses a superconducting direct-current cable full-load operation testing device and method, and the testing device comprises a functional loop unit, a power supply unit and a measurement and control unit. The functional loop unit comprises a direct current loop and a high potential generation loop; the direct-current loop comprises a direct-current power supply, and the direct-current power supply is arranged in the electromagnetic shielding structure and used for applying test current to the superconducting direct-current cable; the high-potential generation loop is used for applying test voltage to the superconducting direct-current cable; the power supply unit is used for providing isolated power supply for the direct current loop and the high potential generation loop; and the measurement and control unit is used for regulating and controlling the functional loop unit, monitoring the state of the functional loop unit and regulating and controlling the output current of the direct current loop and the output voltage of the high potential generation loop. The test cost and the implementation difficulty can be reduced, and the full-load working condition simulation accuracy and the test safety are improved.

The utility model discloses a power supply and a system used for nuclear fusion field anti-configuration. The power supply comprises a DC power supply, an inverter, a multi-output isolation transformer and N resonant branches. The direct-current power supply is electrically connected with the inverter; the inverter is used for converting the direct current into alternating current; the inverter is connected with the input end of the multi-output isolation transformer; and a plurality of output ends of the multi-output isolation transformer are respectively connected with one resonant branch. Structural improvement is carried out on the basis of a traditional field inversion configuration power supply technology, the charging function of capacitors of all branches of a coil is achieved through a transformer, all the branches are isolated from one another in the charging process, and mutual interference and influence are avoided; and meanwhile, the safety of other branches is not influenced when a single branch fails or is damaged in the working process.

A power storage system has a battery, a three-phase motor in which coils of three phases are connected at a neutral point, an inverter connected on an electric power transmission path between the battery and the three-phase motor, and a DC power supply circuit connected to a connection portion positioned on an electric power transmission path between the inverter and the battery. The battery includes two power storages and a switch unit that switches between a first voltage state where the two power storages are connected in series and chargeable at a first voltage, and a second voltage state where the two power storages are connected in parallel and chargeable at a second voltage. The DC power supply circuit has a branch circuit connected to a coil of any one phase among the coils of three phases at a positive electrode side of the DC power supply circuit.