19 results about "Thyristor rectifier" patented technology

The invention provides a PWM / Buck cascade circuit auxiliary electrolytic hydrogen production rectification power supply and a control method, and relates to the technical field of electrolytic hydrogen production power supply and intelligent power grids, and the power supply comprises a main power loop and an auxiliary power loop; the main power loop comprises a multi-pulse thyristor rectifier, the power supply side of the multi-pulse thyristor rectifier is connected with an alternating-current power grid, the load side of the multi-pulse thyristor rectifier is connected with one end of a direct-current smoothing reactor, and the other end of the direct-current smoothing reactor is connected with the electrolytic bath; the auxiliary power loop comprises a PWM rectifier and a Buck circuit which are connected in series, the output end of the Buck circuit is connected to the output end of the main power loop in parallel through a direct-current LC filter, the output end of the Buck circuit and the output end of the main power loop are jointly connected into an electrolytic bath for ripple compensation, the multi-pulse rectifier adopts PI control, the PWM rectifier adopts voltage and current double-closed-loop control and SVPWM modulation, Buck adopts PI and feedforward compound control, and the output end of the Buck circuit and the output end of the main power loop are connected in parallel. The system has the advantages of improving the grid-side electric energy quality, the voltage utilization rate, the water electrolysis hydrogen production efficiency and the operation stability.

The intelligent control system comprises a three-phase thyristor rectifier bridge, a sampling unit and a master controller, the input end of the three-phase thyristor rectifier bridge is connected with a three-phase alternating current power supply, and the output end of the three-phase thyristor rectifier bridge is connected with the lifting electromagnetic chuck through a switch S1 and connected with a storage battery pack through a switch S2; and the storage battery pack is connected in series with the lifting electromagnetic chuck through the IGBT power switch Q1. According to the invention, the technical problems of unreliable magnetic retention intervention, uncontrollable magnetic force, logic conflict risk, huge volume, storage battery maintenance deficiency and the like of a traditional discrete system are solved, seamless switching between magnetic retention and excitation is realized, and accurate magnetic force control under all working conditions and intelligent maintenance of a storage battery in a full life cycle can be realized; the device has the advantages of high safety, strong reliability, compact structure, low cost and the like.

The invention discloses a 12 pulse wave / PWM hybrid rectifier based on multi-winding phase-shifting transformer power supply and a control method thereof, and relates to the technical field of hydrogen production equipment, and the 12 pulse wave / PWM hybrid rectifier comprises a three-phase AC power grid, a multi-winding phase-shifting transformer, a 12 pulse wave / PWM hybrid rectifier and an electrolytic cell. Wherein the additional winding of the multi-winding phase-shifting transformer adopts a type connection method, and provides a winding internal circulation path of harmonics of three times and multiple times of three; the control method comprises the steps of 12-pulse thyristor rectifier control, PWM rectifier control and DC-DC converter control, and a phase compensation mechanism is introduced for the phase difference generated by the main winding and the additional winding of the multi-winding phase-shifting transformer due to the structure. Through topology integration and an advanced coordination control strategy, the problems that in the prior art, water electrolysis equipment is complex, high in cost, large in harmonic wave and ripple wave, low in power factor, slow in dynamic response and the like are effectively solved.

The invention discloses an electrolytic hydrogen production hybrid rectifier control system for fluctuating power input, and the system comprises a three-phase multi-winding transformer which is used for achieving the transformation of voltage and supplying power through a network side; the output end of the thyristor rectifier is connected with the electrolytic bath and used for supplying power to the electrolytic bath; the output end of the IGBT rectifier is connected with the electrolytic bath, and the IGBT rectifier is used for supplying power to the electrolytic bath; and the controller is used for adjusting the running state of the three-phase multi-winding transformer and the running power of the thyristor rectifier and the IGBT rectifier according to a two-stage power fluctuation range by receiving a power instruction sent by the energy management system. Through innovative circuit design and control strategies, accurate control over the electrolytic hydrogen production process is achieved, the hydrogen production efficiency is improved, the cost is reduced, and harmonic pollution to a power grid is reduced. The hybrid rectifier can better adapt to the volatility of renewable energy power generation, and an efficient, stable and economical solution is provided for the field of electrolytic hydrogen production.

The static discharge protection device of the present application including thyristor rectifier comprises: a substrate of a first conductive type; a ring disposed in the substrate, belonging to a second conductive type different from the first conductive type, comprising a first part and a second part spaced apart from each other; a first well of the first conductive type disposed in the substrate and disposed between the first part of the ring and the second part of the ring, spaced apart from the first part of the ring and the second part of the ring; a second well of the first conductive type disposed in the substrate and disposed between the first part of the ring and the second part of the ring, spaced apart from the first well, the first part of the ring and the second part of the ring; a third well of the first conductive type disposed in the substrate and disposed between the first well and the second well, spaced apart from the first well and the second well; and a cathode electrode connected between the first well and the third well, connected to the third well, and connected between the second well and the third well.

This invention discloses an apparatus including a silicon controlled rectifier (SCR). The apparatus includes: a substrate; a plurality of floating wells disposed within the substrate and spaced apart from each other, belonging to a first conductivity type; a plurality of electrodes disposed on the substrate; a ring disposed within the substrate and surrounding the plurality of floating wells, belonging to a second conductivity type; a peripheral well disposed within the substrate and surrounding the ring, belonging to the first conductivity type; and a first buried layer disposed within the substrate and connected to the ring, belonging to the second conductivity type. The plurality of floating wells are interconnected at their respective ends and disposed between the first buried layer and the upper surface of the substrate.

The utility model provides a silicon controlled rectifier equipment flushing device and cooling system relates to silicon controlled rectifier equipment field. This silicon controlled rectifier equipment flushing device includes: liquid inlet pipeline has at least first main pipe section and shunt pipe row, be provided with liquid inlet total valve and monitoring component on first main pipe section, shunt pipe row with first port intercommunication of a plurality of silicon controlled rectifier cooling flow channel, and liquid return pipeline is connected with second port intercommunication of a plurality of silicon controlled rectifier cooling flow channel, be provided with liquid return total valve and blow-off pipe on liquid return pipeline, wherein, monitoring component can show the impurity content of fluid in liquid inlet pipeline, a plurality of shunt branch pipes of shunt pipe row all are provided with branch valve, be provided with blow-off valve on blow-off pipe, the utility model can show in time and fast processing the impurity in silicon controlled rectifier equipment cooling flow channel, avoid the cooling water circulation pipeline blockage and cause the heat dissipation efficiency and production stability to reduce.

The invention provides a hydrogen production rectifier transformer, and relates to the technical field of transformers. The main voltage regulating winding and the auxiliary voltage regulating winding are arranged, the main voltage regulating winding and the high-voltage winding are connected through the on-load voltage regulating switch, and the auxiliary voltage regulating winding and the high-voltage winding pass through the non-excitation voltage regulating switch. The access proportion of the main voltage regulating winding is adjusted through the on-load voltage regulating switch, so that variable flux voltage regulation is realized; when the hydrogen production rectifier transformer is the power supply of the IGBT rectifier equipment, the access proportion of the auxiliary voltage regulation winding is adjusted through the non-excitation voltage regulation switch, and constant magnetic flux voltage regulation is realized; the thyristor rectification and the IGBT rectification are matched at the same time, the investment cost can be reduced, meanwhile, the occupied area is reduced, and the problems that when the thyristor rectification and the IGBT rectification are used in a combined mode, the investment cost is high, and the occupied area is large are solved.

A high-power four-quadrant converter system includes a double-secondary-side oil-immersed rectifier transformer with an output connected to four three-phase bridge type thyristor rectifiers, wherein every two rectifier bridges share a group of rectifier transformer secondary sides; two rectifier bridges sharing a group of rectifier transformer secondary sides are inversely connected in parallel, one of the two rectifier bridges realizes a forward output, and the other one realizes a reverse output; two groups of rectifier bridges which output in the same direction can operate independently or in parallel; when the two groups of rectifier bridges operate in parallel, reactors are connected in parallel to realize current sharing; and the rectifier bridges for the forward output and the reverse output realize free smooth transition under control of a controller, so that a four-quadrant operation of an output current is realized. When the system operates, the electromagnetic compatibility of sensitive components is high.

The utility model discloses a solve the problem that the structure of wiring terminal is more complex in the existing thyristor rectifier module, provide a kind of thyristor module that intermediate trigger maintains lead-out, including thyristor structure, shell, cover;Wherein thyristor structure includes bottom plate and circuit board, and circuit board is fixed on bottom plate;Bottom plate is fixedly installed in the bottom of shell, and the top of shell is also fixedly connected with cover;Still include first electrode, second electrode and mounting seat;Mounting seat is fixedly arranged in shell interior;Mounting seat is provided with the plug-in hole, and the opening direction of plug-in hole is towards cover, and first electrode is inserted into plug-in hole;First electrode is also connected with circuit board through wiring;The other end of first electrode passes through cover, and is exposed on the upper surface of cover;One end of second electrode is directly connected with circuit board, and the other end of second electrode passes through cover, and is exposed on the upper surface of cover;Overall structure is simple, and connection is stable.

The invention discloses a thyristor rectification system control method based on power grid voltage zero crossing point detection. The method comprises the following steps: S1, sampling a first voltage, a second voltage and a charging current; s2, according to the effective value of any phase voltage, judging whether the three-phase alternating-current power grid has a fault or not, if the fault occurs, entering step S3, and if the fault does not occur, entering step S4; s3, a trigger pulse signal of the thyristor rectifier bridge is filled with a dead zone, and a high-magnification energy storage unit is started to supply power to a load; s4, performing zero-crossing detection according to the voltage value of any phase voltage at the current moment and the voltage value of any phase voltage at the previous moment so as to judge whether the voltage of the power grid is in a forward zero-crossing state, if so, entering step S5, and if not, entering step S5; and S5, performing phase compensation and boundary limitation on the initial trigger angle, and finally generating a trigger pulse signal of the thyristor rectifier bridge according to the trigger angle after phase compensation and boundary limitation so as to perform charging management on the high-magnification energy storage unit. The method has the advantages of high real-time performance, high robustness and high reliability.

The application discloses a control method and system for realizing soft starting of a thyristor rectifier bridge, and belongs to the technical field of power generation, power transformation or power distribution. According to the real-time obtained power grid voltage parameters and the power grid voltage frequency, the application introduces specific logic to accurately identify the half-cycle position of the power grid voltage, reduces the frequency measurement error caused by power grid voltage distortion, accurately generates the thyristor driving pulse according to the obtained power grid voltage frequency, introduces a thyristor turn-off point automatic correction algorithm, automatically adjusts the phase of the thyristor driving pulse cycle by cycle, avoids the failure of the thyristor slow starting, and thus ensures the reliable and accurate generation of the thyristor driving pulse.

The invention relates to the technical field of black-start auxiliary excitation, in particular to a black-start auxiliary excitation circuit and a wire connecting device. The system comprises an excitation silicon controlled rectifier bridge, an alternating current magnetic field circuit breaker and a direct current magnetic field circuit breaker which are electrically connected with the excitation silicon controlled rectifier bridge, an excitation transformer electrically connected with the alternating current magnetic field circuit breaker, and a generator and an alternating current branch which are electrically connected with the excitation transformer, the device comprises an AC power switch electrically connected with the excitation silicon controlled rectifier bridge, an excitation transformer electrically connected with the AC power switch, a first diode rectifier bridge electrically connected with the excitation transformer, and an auxiliary excitation control switch electrically connected with the first diode rectifier bridge. According to the black-start auxiliary excitation circuit, the problem that a conventional direct-current power supply cannot be adopted for auxiliary excitation in the excitation black-start process of a large generator set is solved, and the installation and maintenance efficiency of the black-start auxiliary excitation circuit is improved.

The invention relates to a thyristor rectifier driving synchronous triggering time sequence processing method and system, and the method comprises the following steps: carrying out the differential comparison of three-phase AC voltage through three hysteresis comparators, and generating three digital pulse signals; performing high-frequency sampling on the three paths of digital pulse signals by using a DSP with an EPWM module, wherein the sampling frequency is not lower than 10kHz; continuously sampling each path of signal for 16 times, and carrying out software filtering according to a sampling result to filter out high-frequency interference pulses with the width less than 1.6 ms; carrying out edge detection based on the filtered signal, and identifying an effective zero-crossing event under the positive sequence of the power grid in combination with phase relation verification, state machine index matching and time threshold verification; and according to the identified effective zero-crossing event, generating a thyristor trigger pulse, and controlling the rectifier to work.

The utility model provides an energy-adjustable high-energy igniter which comprises an on-off switching assembly, a voltage conversion assembly, a power supply trimming assembly, a discharge ignition assembly, a power supply sampling assembly, a discharge control assembly and a charge and discharge control assembly. Charging and discharging durations can be dynamically adjusted according to the power supply fluctuation state, accurate control over ignition energy is achieved, different application requirements are met, accurate discharging control over the discharging control assembly is achieved through a photoelectric triode and a silicon controlled rectifier, the accuracy of ignition time and energy is ensured, continuous adjustment of charging and discharging energy can be achieved, and the application range is wide. The applicability and flexibility of the product are improved, optical isolation of a high-voltage circuit and a control loop is realized, and the reliability of the product is improved.

The invention relates to the technical field of direct-current ice melting, in particular to a low-voltage dynamic simulation test platform for a control and protection system of a direct-current ice melting device, which comprises an alternating-current power supply access unit which forms an alternating-current input loop through a main circuit breaker, an electric reactor and a contactor; the first alternating current transformer is arranged in the alternating current input loop; the first thyristor rectifier module and the second thyristor rectifier module are connected with the first rectifier transformer and the second rectifier transformer in a one-to-one correspondence mode; the first circuit breaker and the second circuit breaker are used for switching rectification modes, the first circuit breaker controls the second rectifier transformer to be connected with the direct current side of the second thyristor rectifier module, and the second circuit breaker controls the direct current side of the first thyristor rectifier module and the direct current side of the second thyristor rectifier module to be connected in parallel. According to the invention, the rectification mode is switched through the first circuit breaker and the second circuit breaker, so that two functions and performance tests of the control and protection system of the DC deicing device can be realized.

The invention relates to the technical field of power electronics and energy storage system control, in particular to a charging control method and system for an energy storage battery, and the method comprises the following steps: S100, constructing a system dynamic prediction model; s200, system operation parameters are collected, and the internal state of the storage battery pack is estimated; s300, based on the system dynamic prediction model and the internal state of the storage battery pack, constructing and solving an optimization problem which takes the trigger angle of the thyristor rectifier as an optimization variable and comprises the state constraint of the storage battery pack in a prediction time domain, and generating an optimal trigger angle control scheme; the state constraint comprises a charging current upper limit, a terminal voltage upper limit and a temperature rise rate upper limit; and S400, outputting the optimal trigger angle corresponding to the current moment in the optimal trigger angle control scheme to a driving circuit of the thyristor rectifier, and returning to execute the S200. By adopting the scheme, power grid fluctuation can be actively adapted, multi-constraint safety control is realized, and undisturbed smooth transition from a constant current mode to a constant voltage mode is completed.

The utility model discloses an impressed current cathodic protection power supply special for offshore wind power with ultra-wide incoming line voltage, which relates to the technical field of jacket protection and comprises a main circuit system and a control system electrically connected with the main circuit system and used for controlling the main circuit system to work. The main circuit system comprises an AC-DC inlet wire voltage regulation module and a DC-DC voltage regulation module which are connected in sequence, the AC-DC inlet wire voltage regulation module comprises an inlet wire filtering unit and an inlet wire voltage regulation rectification unit, the AC-DC inlet wire voltage regulation module filters input three-phase alternating current, realizes voltage regulation and rectification based on a silicon controlled rectifier rectification circuit, outputs direct current adapting to wide fluctuation of the offshore wind turbine generator set, and outputs the direct current to the DC-DC voltage regulation module. The direct current is sequentially subjected to direct current filtering, high-frequency inversion, voltage regulation, synchronous rectification, output filtering and switch control through the DC-DC voltage regulation module, and protection current is output to an anode bar to realize cathode protection of the jacket; according to the utility model, the adaptability of the power supply to wind power wide fluctuation voltage can be improved, and the device is especially suitable for offshore wind power impressed current cathodic protection scenes.

The application discloses a high-voltage and low-voltage direct-current dual-output three-stage generator system and a design method. The system comprises a three-stage generator and a controller. The three-stage generator is composed of a permanent magnet auxiliary exciter, a main exciter, a main motor, a rotary transformer and a rotary rectifier. The controller comprises a voltage regulating circuit, a thyristor rectifier bridge, a diode rectifier bridge, a control circuit, a power generation control relay and a current sensor. The main motor is provided with a low-voltage three-phase winding and a high-voltage three-phase winding, which meet the requirements of low-voltage direct current and high-voltage direct current respectively. The application adjusts the excitation current of the excitation winding of the main exciter through the voltage regulating circuit, so as to realize the stable voltage of the low-voltage direct current at the expected voltage value. The output high-voltage direct current is stabilized at the expected voltage value by means of phase control rectification control. Meanwhile, the thyristor rectifier bridge generates power and stabilizes voltage by adopting the same switching frequency as the output frequency of the generator, and has the characteristics of low loss, low high-frequency ripple spectrum component, weak high-frequency conduction and radiation interference and high power density.