2276 results about "Thyristor" patented technology

The invention provides a valve actuator dispatching control method and system based on AI intelligence, and relates to the technical field of industrial automation control, and the method comprises the steps: collecting the running state parameters of a steam turbine in real time, determining the relation between the steam inlet amount and the valve opening degree under the current working condition to obtain a preliminary valve opening degree estimated value, and carrying out dynamic response compensation; the method comprises the following steps: carrying out comprehensive coupling analysis on a theoretical valve opening value and mechanical parameters such as response time, inertial parameters and an opening limit threshold value of a valve actuator, calculating a dynamic adjustment weight and carrying out boundary constraint processing to obtain a processed parameter, and calling a preset valve opening-silicon controlled trigger angle nonlinear mapping model in a single chip microcomputer based on the parameter; and calculating a final silicon controlled trigger angle by inquiring adjacent data points and a linear interpolation method. By fusing intelligent prediction, multi-dimensional adjustment and a closed-loop feedback mechanism, the valve control precision and response speed are improved, and efficient and intelligent operation of industrial automatic control is achieved.

The invention relates to the technical field of single-phase asynchronous motors, and discloses an electronic soft start control method for a single-phase asynchronous motor, which accurately controls the start process of the motor by combining an MCU (Microprogrammed Control Unit) with an electricity metering chip and a silicon controlled rectifier technology. After the system is powered on, the MCU control unit firstly carries out initialization and reads initial circuit parameters collected by the electricity metering chip, and whether starting conditions are met or not is judged based on the parameters. Once the starting condition is confirmed to be met, the MCU sequentially triggers the auxiliary silicon controlled rectifiers to switch on the starting winding and then triggers the main silicon controlled rectifiers to switch on the main winding, so that the motor enters a running state. As the motor reaches a stable operation state, the MCU control unit closes the auxiliary silicon controlled rectifier to reduce unnecessary energy consumption, and adaptively adjusts the conduction time of the starting winding according to the actual load condition, thereby ensuring that the whole starting process is stable and efficient.

The invention relates to the technical field of single-phase asynchronous motors, and discloses a single-phase asynchronous motor starting control circuit based on an MCU and double silicon controlled rectifiers, which comprises an MCU control unit, a main silicon controlled rectifier, an auxiliary silicon controlled rectifier, an electricity metering chip and a protection circuit. Particularly, in a starting stage, the MCU control unit firstly sends a trigger signal to the auxiliary silicon controlled rectifier to enable the auxiliary silicon controlled rectifier to be in a conducting state, and the auxiliary silicon controlled rectifier is controllably connected with the starting winding to provide extra starting torque for the single-phase asynchronous motor; and after a starting condition is met, the MCU control unit sends a trigger signal to the main silicon controlled rectifier to enable the main silicon controlled rectifier to be in a conducting state, and the main silicon controlled rectifier is connected with the live wire to enable the single-phase asynchronous motor to enter a normal operation state. Thus, the starting winding is only electrified when necessary, energy loss caused by continuous heating of the PTC is avoided, and the overall energy efficiency of the system is improved.

The invention discloses a high-voltage direct current transmission converter thyristor fault identification method based on reliability evaluation. The method comprises the following steps: constructing a stress-degradation-life mapping relation model through a stepped temperature-voltage cooperative stress test; establishing a three-stage Wiener degradation model, and predicting a critical failure point in combination with a dynamic threshold jump mechanism; an FPGA + CPU heterogeneous computing platform is adopted to execute an EM-MCMC joint estimation algorithm in parallel, and parameter updating is accelerated through assembly line MCMC sampling; designing a dynamic correction factor optimization reliability index based on the buffer layer parameters; constructing a dual-channel LSTM network to extract degradation features and generate a dynamic failure threshold value; a converter topology is reconstructed through a graph neural network, and fault positioning and damage grading are realized in combination with a three-level early warning mechanism. According to the method, fault identification is carried out through combination of multi-stress coupling modeling and a dynamic threshold value, the real-time performance is improved through a heterogeneous computing architecture, the false alarm rate is reduced through combination of a dynamic correction and topology reconstruction technology, and accurate identification and operation and maintenance decision support of the thyristor fault are realized.

The invention discloses an optimized reactive power control and fault ride-through method and system for a hybrid commutation converter, and the method comprises the steps: introducing reactive power control and considering the constant voltage control of negative turn-off angle limitation, achieving the control of an extremely low turn-off angle through the active turn-off of a full-control device in the converter under a steady-state working condition, and further meeting the demands of a high power factor; the investment of passive filter equipment is reduced; under the alternating current fault working condition, forced commutation and negative turn-off angle operation are achieved through active turn-off of a full-control device, the receiving end power grid voltage is effectively supported while commutation failure of a half-control thyristor in the hybrid commutation converter is avoided, and the active power transmission level during the fault period is improved. The full-control characteristic of the reverse blocking type integrated gate commutation thyristor in the hybrid commutation converter is fully utilized, reactive power control under the steady-state working condition and stable power transmission under the alternating-current fault are achieved by optimizing active turn-off control, and the method has wide applicability and good application prospects.

The invention relates to the technical field of power systems, and discloses a voltage regulation system of reactive power compensation equipment, which is characterized in that harmonic interference is filtered and eliminated through a voltage reactive power sensing unit, and accurate power grid parameters are acquired; a load trend pre-judgment unit analyzes the historical load curve and the real-time change trend to generate a future pre-judgment signal; the dynamic compensation calculation unit combines the current power grid state with the prediction to calculate the optimal compensation capacity and generate a switching instruction, after the hybrid switching actuator receives the instruction, a thyristor is triggered firstly to realize inrush current-free conduction, a contactor is switched to maintain low power consumption after the current is stable, and meanwhile, the compensation state monitoring unit performs closed-loop adjustment on parameter deviation, so that the optimal compensation capacity is obtained. The multi-dimensional protection unit prevents overvoltage, overcurrent and overheating, the double-path power supply guarantees continuous operation when the main power supply is abnormal, the intelligent communication unit realizes data uploading and remote cooperation, quick response switching of reactive compensation equipment and guarantee of safety of a large-scale power grid are realized, and inrush current impact in the switching process is effectively inhibited.

The invention relates to a direct-current circuit breaker based on a thyristor and an on-off method of the direct-current circuit breaker, and belongs to the technical field of direct-current middle-high voltage power system fault protection. The direct-current circuit breaker comprises a main switch branch, a current transfer branch, a voltage-limiting energy consumption branch and a pulse commutation loop, the direct-current circuit breaker is connected with a power system in series, and the main switch branch is connected with the current transfer branch. Two nodes connected in series are respectively marked as Q1 and Q2, the main switch branch and the voltage-limiting energy consumption branch are connected in parallel through the Q1 and Q2, one ends of secondary sides of two high-frequency transformers in the pulse commutation loop are respectively connected to the Q1 and Q2, and the other ends of the secondary sides of the two high-frequency transformers in the pulse commutation loop are respectively connected to two ends of the current transfer branch. The problem that in the prior art, a large number of pulse charging and discharging loops are configured for meeting the fault large-current breaking requirement, and consequently the size and cost are increased is effectively solved.

The present description concerns a converter comprising an AC-DC conversion stage comprising a first thyristor, a first power supply circuit delivering a first reference voltage between a first node and a second node, and a second power supply circuit delivering a second reference voltage between third and fourth nodes, the cathode of the first thyristor being coupled to the first node of the first power supply circuit by a first switch and being connected to the fourth node, the second power supply circuit comprising a first rectifying element coupled to the second node of the first power supply circuit and coupled to the third node.

A light source device includes: a light-emitting section including a light-emitting element, the light-emitting element including a thyristor; a setter that sets the light-emitting element of the light-emitting section as a light-emitting element that emits light; and a controller that cancels an ON setting received from the setter after shifting the light-emitting element to a state in which the light-emitting element is able to emit light and that causes the light-emitting element to emit light multiple times by turning ON and OFF a light-emitting current, the light-emitting current causing the light-emitting element to emit light.

The invention relates to the technical field of direct-current circuit breaker manufacturing, in particular to a direct-current circuit breaker with a rapid current suppression capability and a working method of the direct-current circuit breaker. The main branch is a line from the L side to the R side and sequentially passes through a secondary side winding N2 of the coupling inductor and a pair of anti-parallel thyristors. Each of the four charging branches comprises a diode and is matched with a resistor of the charging resistor branch to provide a charging loop for two capacitors in the two capacitor branches, and two buffer branches are respectively connected in parallel with the two capacitor branches. After a thyristor of the trigger branch is triggered, a capacitor of the capacitor branch can transmit energy to N2 in the main branch through a primary side winding N1 of a coupling inductor in the energy transfer branch, and then bidirectional current is cut off. The direct-current circuit breaker is designed by using the coupling inductor and the thyristor, and the direct-current circuit breaker has the advantages of high efficiency, rapid current suppression, good controllability, reprotection after reclosing, low cost and high reliability in the current breaking process.

The invention relates to the technical field of direct current transmission, and particularly provides a control pulse coding method and device for a controllable commutation converter valve control system, and the method comprises the steps: obtaining the trigger control time sequence information of a controllable commutation converter; generating a trigger signal of each device of the controllable commutation converter based on the trigger control time sequence information; coding the trigger signal of each device of the controllable commutation current converter based on the type of each device of the controllable commutation current converter; wherein the device types comprise a main branch thyristor, a main branch IGBT (Insulated Gate Bipolar Translator), an auxiliary branch thyristor and an auxiliary branch IGBT. According to the technical scheme provided by the invention, synchronous trigger control of the controllable commutation converter valve multistage thyristors and the full-control power device can be realized.

The invention discloses a bidirectional hybrid output direct-current transformer and a fault current limiting design method thereof, and the medium-voltage side and the high-voltage side of the bidirectional hybrid output direct-current transformer are respectively composed of three thyristor valve groups and three sub-module bridge arms, and are connected through a medium-frequency transformer. The thyristor valve group is formed by reversely connecting two groups of series thyristors in parallel, and the medium-voltage side sub-module bridge arm and the high-voltage side sub-module bridge arm are respectively composed of NM half-bridge sub-modules and NH half-bridge sub-modules. According to the invention, the sub-module bridge arms with strong control capability are combined with the thyristors and the diode valve groups which are low in cost, low in loss and high in power density, bidirectional power transmission and reliable turn-off of the thyristors can be realized through coordination and cooperation of the middle-voltage side bridge arms and the high-voltage side bridge arms, smooth direct current is ensured, and a filter does not need to be installed. When a short-circuit fault occurs in the outgoing submarine cable, a fault current active suppression strategy is provided, and the scheme can effectively reduce the peak value of the fault current and eliminate the current-limiting inductance.

FinFET multi-diode thyristor switches for protecting high data rate communication system interfaces are provided. In certain embodiments herein, high voltage tolerant FinFET thyristors are provided for handling high stress current and high RF power handling capability while providing low capacitance to allow wide bandwidth operation. Thus, the FinFET thyristors can be used to provide electrical overstress protection for ICs fabricated using FinFET technologies, while addressing tight radio frequency design window and robustness. In certain implementations, the FinFET thyristors include a first thyristor, a FinFET triggering circuitry and a second thyristor that serves to provide bidirectional blocking voltage and overstress protection. The FinFET triggering circuitry also enhances turn-on speed of the thyristor and / or reduces total on-state resistance.

The invention provides a metallurgical chemical solid waste pretreatment vertical electric heating roasting furnace device and a using method thereof.The furnace body is of a hollow cylindrical vertical structure, a barrel is divided into a solid reduction area, an oxidation reduction area and a furnace charge preheating area, the barrel of the solid reduction area and the barrel of the oxidation reduction area are surrounded by flat rectangular red copper pipes, and an auxiliary induction bar is arranged in the center of the barrel; and the feeding and discharging device is connected to the PLC automatic control module. The power supply control and heat supply device is connected with the red copper pipe through a silicon controlled rectifier medium-frequency power supply, and an air supply and exhaust device, a temperature control device and a sealing device are additionally arranged. Fossil fuel is replaced by electric heating, carbon emission is reduced, environmental protection is achieved, temperature control is accurate, heat efficiency is high, and energy consumption and cost can be saved. One set of equipment is suitable for different solid waste raw materials, pretreated products are obtained through different roasting methods, the equipment is simple, investment is saved, the technological process is short, applicability is high, heating is even through the structural design, sealing is good, continuous production can be achieved, and heat efficiency and production efficiency are improved.

The invention relates to the technical field of optocouplers, in particular to a planar SSR optocoupler. Through a light emitting diode arranged on an input loop and a bidirectional photosensitive silicon controlled rectifier and a bidirectional thyristor arranged on an output loop, the bidirectional photosensitive silicon controlled rectifier can be driven by light emitted by the light emitting diode to open a gate pole of the bidirectional thyristor, and the thyristors T1 and T2 are driven to control a load LOAD, so that the product can complete the function of a relay; the number of electronic components in the circuit is smaller, the probability that the whole circuit breaks down is greatly reduced, various electronic components can be protected by means of the shading body, the influence of external environment factors on the various electronic components is reduced, and therefore the probability that the electronic components in the circuit break down can be further reduced, and the service life of the circuit is prolonged. The fault probability of the whole circuit is reduced; the problem that the circuit damage probability is increased due to the fact that an existing relay circuit needs to be composed of a plurality of electronic components is solved.

The invention belongs to the technical field of extra-high voltage direct current transmission, and discloses an IGCT single-valve structure for a converter valve. The IGCT single-valve structure comprises a shielding cover assembly, an IGCT valve string unit, a frame assembly, a water pipe assembly, a resistance-capacitance absorption assembly and a water-cooled reactor. Wherein the IGCT valve string unit, the water pipe assembly and the resistance-capacitance absorption assembly are arranged on the frame assembly, and the shielding cover assembly covers the periphery of the outer portion of the frame assembly; the water-cooling reactor is arranged in the shielding case assembly and connected with the frame assembly and the shielding case assembly, and the water pipe assembly is connected with a water path of the water-cooling radiator in the IGCT valve string unit and a water path of the water-cooling reactor. The problem of hidden danger of commutation failure in the traditional direct-current power transmission converter valve technology can be solved, the function of the circuit breaker is added, fault current can be blocked, the new single valve structure can replace the single valve layer of the traditional direct-current power transmission converter valve of the thyristor, and the engineering replacement cost and the operation difficulty are greatly reduced.

The invention provides a current source type hybrid direct-current power transmission system based on an injection type power grid commutation converter, and relates to the field of high-voltage direct-current power transmission, and the system comprises a rectification station which at least comprises a thyristor-based power grid commutation converter and is used for converting alternating current into direct current; the inverter station at least comprises an injection type power grid commutation converter and is used for converting the direct current output by the rectifier station into alternating current; and the control module is used for controlling the operation of the rectifier station and the inverter station based on the trigger time sequence constraint, and has the advantages of completely inhibiting the commutation failure and reducing the loss.

According to the hair drier (hair dryer) temperature control adjusting circuit, a heating device is divided into two windings of a first heating wire and a second heating wire, the mains supply detection module is used for detecting the change of the voltage value of the mains supply, and the alternating current zero-crossing detection module is used for capturing the zero-crossing point of the alternating current of the mains supply; the MCU module is used for respectively controlling whether the first silicon controlled rectifier control module, the second silicon controlled rectifier control module and the third silicon controlled rectifier control module are conducted or not according to control signals sent by the mains supply detection module and the alternating current zero-crossing detection module, and controlling the conduction time to change the series-parallel connection mode and chopping of two windings of the first heating wire and the second heating wire according to control signals sent by the mains supply detection module and the alternating current zero-crossing detection module; combination of different powers under the condition that mains supplies with different voltages are input is achieved, so that the final power is stable or constant, the application range of the blower is wider, the blower can be compatible with the mains supplies with different input voltages and can be used in countries with different input mains supplies, the cost is effectively saved, and the application range of the blower is widened. And the size of the control circuit is mastered reasonably.

The invention discloses a thyristor failure test device, which relates to the technical field of thyristor life test, and comprises a power supply, a protective resistor, an artificial neutron source, a data acquisition device and a processing module, and is characterized in that the power supply is used for providing direct current bias voltages with different sizes and different polarities for a sample thyristor; the artificial neutron source is used for enabling random single-particle burnout events to occur in the sample thyristor; the protection resistor is used for limiting main loop current; the data acquisition equipment is used for acquiring bias voltage signals on the sample thyristors in real time; and the processing module is used for recording the occurrence time of the single-particle burnout event according to the bias voltage signal on the sample thyristor when the single-particle burnout event occurs in the sample thyristor, and fitting the occurrence time of the single-particle burnout event and the corresponding bias voltage signal to obtain the failure rate of the thyristor. According to the invention, the condition of irradiation failure of the thyristor under voltage bias under the actual working condition can be truly reflected.

Disclosed in the present invention is a ground fault device end-of-life self-test system. An induction coil and a neutral coil are used for sensing and acquiring a ground fault leakage current signal of a live wire or a neutral wire. A trip device is used for cutting off the power supply to a load in the event of a ground fault by driving a solenoid by means of a thyristor which is triggered by an IC1 to turn on. A manual test button is used for manually testing the function of a ground fault device. A rectifying circuit is used for rectifying an alternating current (AC) and outputting same to a direct current, and providing the direct current to IC1 and IC2 direct current power supplies. A ground fault detection circuit is used for completing ground fault detection, and controlling the drive to trigger the thyristor to turn on or off. A ground fault self-test control circuit is used for controlling the testing of a ground fault detection function without affecting normal ground fault detection and protection functions.

A semiconductor device has a first substrate and a first semiconductor layer formed over the first substrate. A second substrate is disposed over a surface of the first semiconductor layer opposite the first substrate. The first semiconductor layer and second semiconductor layer can be silicon carbide or cubic silicon carbide. The first substrate and a portion of the first semiconductor layer are removed to reduce defects in the first semiconductor layer. A second semiconductor layer is formed over a remaining portion of the first semiconductor layer. A third semiconductor layer is disposed over the second semiconductor layer. The third semiconductor layer can be silicon. The third semiconductor layer can be disposed over the second semiconductor layer by direct wafer bonding. An electrical component is formed within the third semiconductor layer. The electrical component can be a power MOSFET, IGBT, CTIGBT, diode, and thyristor.

The invention relates to the technical field of electrical engineering, and discloses a converter valve short-circuit current test system and method, and a generator branch in the system comprises a short-circuit generator, a short-circuit control unit and a bidirectional thyristor valve; one end of the generator branch is connected to one end of the sample valve through the short circuit control unit and the bidirectional thyristor valve in sequence; the other end of the sample valve is connected to the other end of the generator branch; the capacitor branch is arranged at two ends of the sample valve in parallel; the capacitor branch comprises a short-circuit valve body control unit, a capacitor bank and a direct-current power supply; one end of the short-circuit valve body control unit is connected to one end of the sample valve, and the other end is connected to the other end of the sample valve through the capacitor bank; the direct-current power supply is arranged on the capacitor bank in parallel; according to the invention, independent decoupling adjustment of the alternating current component and the direct current component of the short-circuit current is realized, and the test requirements on the gradually increased peak value of the short-circuit current, the thermal capacity and the short-circuit current containing the high-proportion direct current component are met.

The present invention discloses a bidirectional gate controlled thyristor structure, comprising a first P-type epitaxial layer, a second P-type epitaxial layer, a first N-type deep well doping type well region and a first N-type well doping type well region which are stacked; a first P-type high voltage doping type well region is provided on the first P-type epitaxial layer, a first P-type well doping type well region is provided inside one side of the first P-type high voltage doping type well region, a first P-type heavily doped active region is provided at the top of the other side of the first P-type high voltage doping type well region, a plurality of groups of second P-type heavily doped active regions and first N-type heavily doped active regions arranged in parallel are provided at the top of the first P-type well doping type well region, and the first P-type heavily doped active region and the plurality of groups of first P-type heavily doped active regions and first N-type heavily doped active regions arranged in parallel are isolated from each other. The ring-shaped gate controlled structure of the present invention adjusts the carrier transport path to a deeper level, solving the problems of low voltage maintenance and low current discharge efficiency of the existing thyristor structure.

The invention provides a simulation method and system with controllable split-phase voltage drop time difference, and relates to the technical field of electric power testing, and the method comprises the steps: adjusting voltage through a three-phase voltage regulator, employing a bidirectional silicon controlled rectifier and IGBT hybrid switch structure to achieve voltage drop, collecting and processing a three-phase voltage signal through a digital signal processor, and extracting zero crossing point information; and a control pulse signal with phase compensation is generated, the conduction time sequence of the switch element is controlled to realize soft switching, and the industrial computer receives and processes the signal and displays a voltage drop waveform. The split-phase voltage drop time difference can be accurately controlled, and the simulation precision and the system reliability are improved.

The invention relates to the technical field of solar cell manufacturing, and discloses a method for electroplating copper and tin grid lines on a solar cell, which comprises the following steps of: S1, copper electroplating: putting a cell piece on an electroplating tool, and putting the cell piece into a copper liquid tank for electroplating copper layers on a P surface and an N surface; wherein a very-low-frequency power supply is adopted. And S2, cleaning the copper liquid on the battery piece. S3, tin electroplating: the battery piece after the copper liquid is cleaned is placed in a tin liquid tank for electroplating tin layers on the P surface and the N surface; wherein a very-low-frequency power supply is adopted. And S4, cleaning the tin liquid on the battery piece. And S5, the cleaned battery piece is taken out, and grid line electroplating is completed. The very-low-frequency power supply is used for replacing a silicon controlled rectifier direct-current power supply, and self-developed voltage and current parameters are matched, so that the compactness and the conductivity of the HDT high-efficiency single-crystal heterojunction solar cell on an electroplated metal grid line film layer are improved, and the conversion efficiency of a cell piece is improved.

The invention discloses a converter valve multistage thyristor level closed-loop test device which comprises a CPU control module, a photoelectric conversion module, an analog quantity acquisition module, a switching value module, an output control unit, an impedance test unit, an overvoltage and overcurrent protection module, a safety protection module, a man-machine interaction unit module and a power supply module. The CPU control module is respectively connected with the photoelectric conversion module, the analog quantity acquisition module, the switching value module, the output control unit, the impedance test unit, the overvoltage and overcurrent protection module, the safety protection module and the man-machine interaction unit module; the power supply module is connected with the CPU control module, the safety protection module, the photoelectric conversion module, the analog quantity acquisition module, the overvoltage and overcurrent protection module, the switching value module, the output control unit, the impedance test unit and the man-machine interaction unit module. According to the invention, the automation degree and the field adaptability of the test are improved, and the field maintenance efficiency and the visual analysis capability of the operation state of the thyristor are improved.

The invention belongs to the technical field of power transformation equipment, and particularly relates to a low-voltage dynamic reactive compensation switching device which comprises a shell, a photoelectric isolation module and a communication module. The shell is in an inverted-T shape, a switching switch is arranged at the front end of the shell, wiring ports are symmetrically formed in the upper side and the lower side of the shell, and wiring bolts are installed on the wiring ports. A photoelectric isolation module is arranged on one side of the shell, and the heat dissipation holes dissipate heat for the photoelectric isolation module. According to the scheme, a thyristor and contactor hybrid switching switch is adopted, zero-crossing switching is realized by the thyristor during dynamic load fluctuation, and inrush current control is less than or equal to 10 times of rated current. And when the static state is stable, the contactor is automatically switched to be conducted, and the power consumption is reduced to 1.5 W and is greatly reduced compared with a pure thyristor scheme, so that the impact is avoided and the energy consumption is reduced. The thyristors are in bidirectional anti-parallel connection, and are matched with zero-cross detection logic of the controller, so that overvoltage and transient harmonic waves in the switching process are thoroughly eliminated, no interference is caused to a power grid, and the service life of the device and power grid equipment is prolonged.

The invention discloses a thyristor type device leakage current monitoring method and circuit and a power electronic device.The method comprises the steps that in response to a system turn-off instruction, a first control signal is sent to a device turn-off module; the device turn-off module is used for conducting a turn-off branch of the thyristor device according to the first control signal; acquiring a leakage current sampling signal from a leakage current monitoring module; the leakage current monitoring module is used for converting the gate current of the thyristor device into a leakage current sampling signal; and generating a leakage current monitoring result based on the leakage current sampling signal. According to the invention, real-time and accurate measurement of the leakage current can be realized on the premise of not influencing system operation.

The invention relates to the technical field of flexible direct-current power transmission, and particularly provides an optimal control method and device for an interlaced thyristor modular multilevel converter, and the method comprises the steps: obtaining an upper / lower bridge arm insertion index of the interlaced thyristor modular multilevel converter; correcting the insertion index of the upper / lower bridge arm by using the feed-forward gain of the working state change of the staggered thyristor modular multilevel converter; based on the corrected upper / lower bridge arm insertion index, determining the number of upper / lower bridge arm input working sub-modules of the staggered thyristor modular multilevel converter; on the basis of the number of working sub-modules put into the upper / lower bridge arm of the interleaved thyristor modular multilevel converter, a capacitor voltage balance algorithm is adopted to generate switching signals for controlling the sub-modules in the upper / lower bridge arm of the interleaved thyristor modular multilevel converter. According to the scheme, by changing the working principle of the redundant module and reducing the capacitor voltage reference value, the average conduction duration of the switching device with serious loss is reduced, and then loss distribution optimization is achieved, and the total loss is reduced.

The invention provides a multi-path vibration energy collection device, and the device comprises a mass block which can generate relative movement under the excitation effect; the piezoelectric cantilever beams are arranged on the two transverse sides of the mass block and used for responding to high-frequency micro-amplitude vibration energy; the permanent magnet assembly is fixed in the moving direction of the mass block and is matched with the induction coil to realize magnetoelectric energy conversion; the piezoelectric cantilever beam is connected with the bridge rectifier and the thyristor threshold trigger circuit 1, and the permanent magnet assembly is connected with the bridge rectifier and the thyristor threshold trigger circuit 2 to form a double-independent energy collection channel. The method has the following advantages: (1) a path orthogonal decoupling design is adopted, so that a structure and energy dual-independent acquisition path is realized; (2) the energy conversion efficiency is improved based on a coupling response mechanism of mass block inertia driving; and (3) a thyristor threshold triggering mechanism realizes micro-energy efficient conversion, and the output is stable and reliable.