17 results about "Saturable reactor" patented technology

The application discloses a high-stability shell-type saturated reactor and relates to the technical field of reactors. The high-stability shell-type saturated reactor comprises a device base and a reactor shell. The reactor shell is fixedly installed on the top surface of the device base. A waterproof telescopic pipe is fixedly installed on the inner wall bottom end surface of the reactor shell. A damper is fixedly installed on the inner wall of the waterproof telescopic pipe. The damper is lifted by the adjusting lead screw through the rotation of the turbine. The polyurethane contact plate and the clamping plate form a rigid vibration conduction path. After the vibration is absorbed by the two-stage buffer spring and damper, the residual energy is guided into the foundation through the conduction platform. The damper is lifted synchronously to pull the oil distribution pipe. The oil distribution is redistributed so that most of the cooling oil enters the inside of the hose. The reactor is forcibly cooled, so as to make up for the defects that the service life of the reactor is reduced due to vibration and high temperature when the core winding suspended in the inside of the reactor shell is in high-load operation.

The invention relates to a system (2) for converting a first voltage (U1) into a second voltage (U2), comprising an electromagnetic interference filtering stage (4) and an active power factor correction stage (6) connected to an output of the electromagnetic interference filtering stage (4), the active power factor correction stage (6) comprises a bidirectional synchronous bridge rectifier (16) and at least one high-frequency electronic switching branch (18) connected to the output of the rectifier (16) via at least one main inductor (8), the number of high-frequency electronic switching branches being equal to the number of main inductors, the electrical energy conversion system (2) further comprises a saturable reactor (9) having a saturation current threshold, the inductance of said reactor (9) when unsaturated being substantially equal to the inductance of the main inductor (8).

The invention discloses a chip-type saturable reactor unit and a saturable reactor group, and relates to the technical field of direct current transmission, the chip-type saturable reactor unit comprises an iron core of a sheet-shaped annular structure, a sheet-shaped winding fixed on the iron core, and a first busbar and a second busbar which are electrically connected with the winding; one end of the first busbar and one end of the second busbar are electrically connected with two leading-out terminals in the winding respectively; the other end of the first busbar and the other end of the second busbar are leading-out ends of the chip type saturable reactor unit and are used for being connected with other chip type saturable reactor units. The chip-type saturable reactors are connected in series and in parallel to form the saturable reactor group, so that the electrical parameters, the through-flow level and the insulation level of the saturable reactors for any engineering can be achieved; the series-parallel connection of the reactor unit structure can be realized only by adjusting the positions of the busbars and the busbar lead-out holes, and the design compactness and integrity of the reactor are ensured to the greatest extent.

The utility model discloses a high-heat-dissipation low-loss converter valve, which comprises a heat dissipation bottom plate, a first power control assembly, a second power control assembly, a damping capacitor, a voltage-sharing capacitor, a damping resistor, a voltage-sharing resistor and a saturable reactor, the first power control assembly, the second power control assembly, the damping capacitor, the voltage-sharing capacitor, the damping resistor, the voltage-sharing resistor and the saturable reactor are all fixedly installed on the upper surface of the heat dissipation bottom plate, and the first power control assembly and the second power control assembly are connected through a connecting bridge; the first lower pole piece is connected with the first upper pole piece and matched with the first fins to achieve effective heat dissipation of the first thyristor, the second lower pole piece is connected with the second upper pole piece and matched with the second fins to achieve effective heat dissipation of the second thyristor, and meanwhile the connecting bridge is matched with the grid plate through the structure of the connecting bridge to further conduct auxiliary heat dissipation. And the first thyristor and the second thyristor carry out self heat dissipation through self structures, so that the power loss of the thyristors caused by high temperature is reduced.

The invention relates to a portable voltage surge characteristic detection device for a saturable reactor, which comprises a shell, a relay is arranged on one side of the bottom in the shell, and a battery mounting groove for mounting a rechargeable battery pack is formed in one side of the relay. The battery mounting groove comprises a first fixing plate, a second fixing plate and clamping plates located on the two sides of the battery mounting groove. A sliding groove is formed in each clamping plate, a sliding block is connected in each sliding groove in a sliding mode, the sliding blocks are connected with hinge shafts, and the two sliding blocks are hinged to a first fixing plate and a second fixing plate through the hinge shafts respectively; first telescopic grooves located in the two sides of the battery mounting groove are formed in the bottom of the interior of the shell. A clamping plate is elastically connected into the first telescopic groove; and the rechargeable battery pack supplies power to the detection device. Compared with the prior art, the device has the advantages of being small in size, capable of being adjusted and stabilized according to the size of the rechargeable battery pack, capable of achieving portable detection of the voltage impact characteristic of the saturable reactor and the like.

The invention provides a design method of a magnetic saturable reactor based on a composite material and the reactor, and belongs to the technical field of magnetic saturable reactors. A double-phase composite magnetic material is prepared by adopting a melt rapid quenching method, a magnetic circuit equivalent circuit model of a four-column type iron core structure is established, and air gap geometric parameters are optimized; a game model with the purposes of minimizing eddy current loss and maximizing an iron core lamination coefficient is constructed to carry out silicon steel sheet thickness sequence optimization, silicon steel sheets and a composite material are processed into a specified geometric structure according to a section shape function calculation result, and a complete magnetic circuit is formed through a connection mode that a working winding is connected in series and a control winding is connected in parallel. And finally, the residual magnetism state of the double-phase composite magnetic material is changed by adjusting and controlling the current of the winding, so that the reactance value is linearly adjusted and controlled within a rated range, and the technical problem that the adjustment precision and the response speed are difficult to guarantee simultaneously in the wide-range reactance value adjustment process of the magnetic saturable reactor is solved.

The invention relates to the technical field of reactor thermal design, in particular to a reverse design method and system for an anode saturable reactor iron core structure, and the method comprises the steps: constructing a reverse generation network and a forward verification network; generating a recommended iron core thickness combination through a reverse generation network according to target temperature distribution set by a designer, and generating predicted temperature distribution and manufacturing tolerance sensitivity according to the recommended iron core thickness combination and the forward verification network; generating adjusted target temperature distribution according to the target temperature distribution, the predicted temperature distribution, the manufacturing tolerance sensitivity and a preset design qualified threshold; and generating an optimal iron core thickness combination and optimal temperature distribution according to the adjusted target temperature distribution. Through the bidirectional coupling neural network model and the interactive feedback mechanism, the physical realizability of the target temperature distribution can be evaluated at the initial stage of design, a designer is guided to correct an unpractical target, and invalid design is avoided.

The invention provides an equivalent circuit of a controllable commutation converter and a control method thereof, the equivalent circuit comprises a first simulation module, a second simulation module, a saturable reactor and a power assembly, the power assembly comprises a semiconductor device, the first simulation module comprises a first charging unit and a first discharging unit, the first charging unit is used for charging the first discharging unit, and the second simulation module comprises a second charging unit and a second discharging unit. The first discharge unit is used for discharging to the second simulation module through the saturable reactor so as to simulate discharge of lightning arresters connected in parallel to two ends of a single converter valve in the controllable commutation converter; the second simulation module comprises a second charging unit and a second discharging unit, the second charging unit is used for charging the second discharging unit, and the second discharging unit is used for discharging the semiconductor device so as to simulate the discharge current of the lightning arrester connected in parallel to the two ends of the semiconductor device in the converter valve; the problem that the aperiodic trigger working condition of simultaneous discharge of two lightning arresters in the hybrid controllable commutation converter cannot be accurately simulated is solved.

The utility model provides a current conversion system, which comprises an alternating current source end, a direct current line end and at least one phase of main circuit, the at least one phase of main circuit is connected between the alternating current source end and the direct current line end, the at least one phase of main circuit comprises an upper bridge arm and a lower bridge arm, the upper bridge arm and the lower bridge arm are respectively connected to the direct current line end; the reactor assembly is arranged between the upper bridge arm and the lower bridge arm of the at least one phase of main circuit; when the upper bridge arm and the lower bridge arm of the at least one phase of main circuit work, the current rising rate is limited through at least one part of the reactor assembly. The converter system provided by the utility model not only can greatly reduce the demand for the saturable reactor, but also can effectively suppress the current oscillation caused by the discharge of the stray capacitor in the periodic trigger opening process, and meanwhile, the reactor is externally arranged, thereby reducing the risk of the vibration of the valve and the water leakage of the reactor to the safe operation of the valve.

The invention discloses an anti-saturation reactor, and belongs to the technical field of reactors. An annular magnetic core structure is adopted, the magnetic core is made of a soft magnetic material and is provided with a closed or non-closed magnetic circuit, continuous or quasi-continuous magnetic performance gradient distribution is formed on at least one dimension of a magnetic circuit path, and the gradient shows that a material corresponding to an area with high magnetic field intensity has higher anti-saturation capacity; and the anti-saturation capability is relatively weak in a region with relatively low magnetic field intensity. According to the scheme, the problems of complex process, serious flux leakage, insufficient anti-saturation capability, high high-frequency loss and the like caused by the fact that a traditional electric reactor depends on air gaps or dissimilar material splicing are solved. The magnetic circuit design is simplified through integrated forming, the air gap defect is eliminated, the anti-saturation capacity and the energy storage efficiency are remarkably improved, the gradient magnetic performance is naturally matched with magnetic field distribution, the local saturation risk is reduced, splicing is avoided, the mechanical reliability is improved, the cost is controllable and the performance is stable due to high-automation preparation, and the requirements for high magnetic conductivity and anti-saturation are met.

The invention relates to a saturable reactor fault identification method and system based on an adaptive sampling frequency, and the method comprises the steps: obtaining fault identification influence parameters of a target saturable reactor under overvoltage impact, the fault identification influence parameters comprising an initial sampling frequency and a response current time sequence; evaluating the fault identification influence parameter to obtain a sampling frequency unreasonable index, and judging whether frequency adjustment is needed or not according to the sampling frequency unreasonable index; if frequency adjustment is needed, actual sampling frequency is obtained through calculation according to the sampling frequency unreasonable index and the initial sampling frequency, and initial response data of the reactor are collected according to the actual sampling frequency; filtering the initial response data to obtain actual response data, and calculating actual characteristic parameters; and comparing the actual characteristic parameters with the parameter base line of the reactor to identify the fault. Compared with the prior art, the method has the advantages of adaptively adjusting the sampling frequency, effectively improving the feature parameter and fault recognition accuracy and the like.

The invention discloses a saturable reactor and a power electronic switch, relates to the technical field of power electronic switches, and is used for solving the problems that in the prior art, a saturable reactor is large in parameter margin, large in weight, heavy in size, not suitable for protecting a single-stage thyristor in a low-voltage valve assembly and not capable of meeting the application requirement of the low-voltage valve assembly. The saturable reactor comprises an iron core, a diversion column, a first electrode plate and a second electrode plate; the first electrode plate and the second electrode plate are respectively fixed at two ends of the diversion column; the first electrode plate and the second electrode plate are used as leading-out busbars of the saturable reactor; and the iron core is closed and surrounds the diversion column, and / or the diversion column winds the iron core. The saturable reactor provided by the invention is simple in structure, more compact in size and lower in voltage class, a single thyristor can be configured with a single saturable reactor provided by the invention, and the performance of an original saturable reactor can be realized by connecting a plurality of saturable reactors in series.

This invention discloses a modular integrated plate-type saturated reactor assembly, comprising a main body, a magnetic core, and a base. The magnetic core is fixedly mounted on the upper surface of the base, and several windings are fixedly arranged on its peripheral side. Several partition structures and busbar assemblies are provided on the magnetic core, and several guide brackets are positioned above it. A magnetically guided slider slides within each guide bracket. A driving mechanism is provided within the guide brackets to drive the magnetically guided sliders to slide along the guide brackets. When the driving mechanism is activated, the magnetically guided sliders move above two adjacent magnetic core partitions, connecting or disconnecting these two partitions in the magnetic circuit. This invention uses magnetically shielding sheets filled in the partition slots to divide the magnetic core into multiple independent partitions. Electromagnets drive the magnetically guided sliders to move above two adjacent magnetic core partitions, connecting or disconnecting these two partitions in the magnetic circuit, thereby changing the magnetic circuit length and volt-second product of the magnetic core, avoiding customized design and reducing repetitive work.

The invention discloses a compression joint heat dissipation integrated module of a reverse resistance IGCT valve assembly, which comprises an HCC single valve, the HCC single valve comprises a support disc, the edge of the upper surface of the support disc is provided with a frame, the frame is fixedly connected with a shielding cover, the upper surface of the support disc is fixedly connected with a saturable reactor, and the saturable reactor is fixedly connected with the HCC single valve. A damping capacitor is arranged in the middle of the upper surface of the supporting disc, an IGCT valve assembly is arranged on one side of the damping capacitor, a cooling water channel is arranged on one side of the IGCT valve assembly, a conveying pipe is arranged at the upper end of the cooling water channel, a backflow device is arranged at the lower end of the cooling water channel, and a cooling device is arranged on the outer side of the backflow device. Cooling water passing for the first time can be cooled, then the cooling water is pumped back into a follow-up pipeline, the temperature of the cooling water is reduced, accumulated heat is reduced, meanwhile, the water pressure of return water is increased, and the cooling rate is increased. And the cooling water moves into the cooling device through the descending pipeline.

The invention discloses a submarine cable performance test system and method, and the system achieves the synchronous application of two voltages through a DC impact superposition module, and a DC blocking saturable reactor effectively isolates a DC source from an impact loop, avoids the impact waveform from the internal resistance of the DC power supply, and improves the performance of a submarine cable. Meanwhile, dynamic distribution of space charges, dielectric loss change and partial discharge characteristic quantity are synchronously acquired through the composite data acquisition module, synchronous acquisition and comprehensive analysis of multiple physical quantities are realized, and the problem that a traditional discrete test cannot reflect the actual working condition coupling effect is solved; and a reliable test means is provided for evaluating the insulation performance degradation rule of the submarine cable under the action of complex electromagnetic stress, so that the performance test accuracy of the submarine cable is improved.

The application provides a power grid auxiliary frequency modulation method and system and a storage medium, comprising the following steps: establishing a load model based on a preset current stabilizing system of a high-load electrolytic aluminum load, and determining a load power variation characteristic curve; describing the load power variation characteristic curve of the electrolytic aluminum through a first-order inertia link, fitting through a least square method, and generating a curve parameter; determining a reference current setting range of the current stabilizing system of the electrolytic aluminum load through a preset saturation reactor working voltage critical value, and calculating an electrolytic aluminum load power variation range; generating a load controller through each link parameter of the electrolytic aluminum load; and the load controller controls the electrolytic aluminum load to respond to system frequency disturbance. The application solves the problem of inaccurate and poor effect of the existing electrolytic aluminum auxiliary power grid frequency modulation.

The invention provides a soft switching power circuit, a sub-module, an MMC and a flexible direct current converter valve. The soft switching power circuit can comprise a power tube, a turn-on current limiting module and a turn-off voltage limiting module. The turn-on current-limiting module is connected in series with the power tube, and the turn-off voltage-limiting module is connected in parallel with the power tube. Wherein the turn-on current limiting module comprises a saturable reactor, and the turn-off voltage limiting module comprises a buffer capacitor. The turn-on current limiting module is used for controlling soft turn-on of the power tube through the saturable reactor. The turn-off voltage limiting module is used for controlling soft turn-off of the power tube through the buffer capacitor. According to the invention, the soft switching-on of the power tube is realized through the saturable reactor, the soft switching-off of the power tube is realized through the buffer capacitor, the switching-on loss and the switching-off loss of the power tube are greatly reduced in the soft switching-on and soft switching-off processes, and the through-current capability of the power tube is greatly improved.