82results about How to "Reduce reactive power consumption" patented technology

The invention provides an intelligent control method for a traffic light at a highway intersection, and belongs to the technical field of traffic signal light control methods. The intelligent control method comprises the steps of setting a lane and traffic flow detection meter for detecting lane sections of the lane and the traffic flow, setting the traffic light, and setting up an information processor for analyzing and processing the traffic flow and controlling the traffic light. The intelligent control method has the advantages that coexistence of lane blocking and lane idleness is eliminated, and whatever any time periods, any time frames and any reasons, all lane resources of the highway intersection are can be utilized to the maximum extent, intersection traffic efficiency is improved; due to improvement of the traffic efficiency, reactive power consumption of vehicle fuel and energy is reduced to the maximum extent, expenses and time are saved, and waste gas emission is reduced; waiting time for passing of a vehicle driver is relatively reduced in lane sections or time periods with a few traffic flow, impatient emotion of the driver can be effectively relieved, and second rushing, lane rushing and traffic accidents due to the second rushing and lane rushing are reduced.

The invention discloses an alternating current mains supply isolation zero crossing checking circuit combined with low-voltage power line carrier wave communication signal coupling, belonging to the field of low-voltage power line carrier wave communication and control. The circuit comprises a carrier wave signal coupling circuit, a zero crossing checking circuit and a protective circuit, wherein the carrier wave signal coupling circuit receives and sends the carrier wave signal in the carrier wave communication process in a mode of combining series resonance with a coupling transformer, and the active power consumption and the inactive power consumption of a system can be effectively lowered. in the zero crossing detection circuit, a biasing circuit is designed according to the conduction condition of a Darlington tube, the capacitance characteristics and the optocoupling working condition, so as to accurately detect the zero crossing point time of the alternating current mains supply; the carrier wave signal coupling circuit and the zero crossing detection circuit share one protective circuit to prevent impact interference, such as pulse or surge and the like; and strong current and weak current are completely isolated to guarantee system safety. In the alternating current mains supply isolation zero crossing checking circuit, a low-voltage power line carrier wave coupling circuit is combined; the characteristics of components are used for realizing the zero crossing point detection function; the coupling circuit and the detection circuit share one protective circuit, and the whole circuit is easy to realize, thereby correspondingly lowering cost, and lowering the active power consumption and the inactive power consumption of a system; and especially the zero crossing point detection accuracy required for carrier wave communication is guaranteed.

The invention relates to the technical field of oil field monitoring, in particular to an oil well failure intelligent analysis and decision system and method. The oil well failure intelligent analysis and decision system comprises a data collecting module, a remote measuring and controlling module, a server, a database connecting module and a function module. The data collecting module comprises an electrical parameter collecting module, a temperature sensor, a pressure sensor, a dynamic liquid level measuring instrument, an integrated dynamometer, a flow sensor and a combustible gas detector. The electrical parameter collecting module, the temperature sensor, the pressure sensor, the dynamic liquid level measuring instrument, the integrated dynamometer and the flow sensor are all in communication connection with the remote measuring and controlling module. A production database and an expert database are arranged in the server. The production database is in one-way communication connection with the data collecting module. The expert database is in two-way communication connection with the database connecting module. By building the oil field intelligent analysis and decision expert system, real-time monitoring, analyzing, fault diagnosing and predicting are conducted on the production parameters of an oil well, the cost of the oil field is saved, and manpower and material resources are saved.

The invention relates to a stress loading device. The stress loading device comprises a loading cabin, a hydraulic control system and a servo oil source; the loading cabin comprises an axial horizontal rear loading cover, an annular loading frame and a front counter-force cover; a test piece platform for horizontally bearing a model is arranged on the bottom side in the annular loading cabin frame; uniformly distributed loader arrays which are used for applying stress are arranged on the left side, the right side and the upper side, opposite to the left surface, the right surface and the upper surface of the model, in the annular loading frame; uniformly distributed loader arrays are arranged in the axial direction, opposite to the rear surface of the model, of the rear loading cover; a front counter-force plate is arranged in the axial direction, opposite to the front surface of the model, of the front counter-force cover. The uniformly distributed loaders in the loading cabin are connected with the servo oil source; a displacement sensor and an oil pressure sensor are arranged in the loading cabin; the displacement sensor and the oil pressure sensor are connected with a hydraulic control system. The annular loading frame is detachably connected with the rear loading cover and the front counter-force cover in a sealed manner. The device can apply a variety of modes of stress to the models with different sizes.

The invention discloses a soft switching high-efficiency wireless charging method based on bilateral phase shifting and frequency adjusting. The DC side of a sending end converter and the DC side of areceiving end converter of a wireless charging system are each connected with a soft switching auxiliary branch circuit, by reasonably controlling the on and off of an auxiliary switching tube and resonating the voltage of a bridge arm into zero before the switching tube is switched on, the zero-voltage on of all sending end switching devices and receiving end switching devices is realized. Meanwhile, according to the soft switching bilateral phase shifting control system, by means of the frequency adjusting method, the switching frequency is the same as the resonating frequency all the time,the loss problem caused by the idle work under detuning can be avoided, and efficiency is further improved. The method is simple in structure and convenient to implement, the soft switching work of the power converters of the wireless charging system is ensured, the partial efficiency of the converters is improved, and the low-reactive loss of original side coils and auxiliary side coils is realized through the frequency adjusting and phase shifting control mode.

A full-automatic EVA secondary foaming disk molding machine belongs to the technical field of rubber and plastics machines and is composed of a mounting frame, mold stations, a cooling system, a heating plate, rotating disks, an intensive mold, a driving positioning assembly and a control system. The mounting frame is a hexagon planar structure and is a bearing frame of the molding machine. Each mold station is a vertical square framework with an upper cover plate and a bearing plate. There are six mold stations which comprise heating mold stations and cooling mold stations and are respectively installed at the middle position of each straight edge of the mounting frame. The cooling system is a sealed inner loop heat exchange system with a refrigerating machine as a cold source. The rotating disks are a combined disk structure and installed on the bearing plate in the square framework of each mold station. The intensive mold is an open structure for holding multiple product models. Thecontrol system controls the molding machine to automatically operate according to preset program parameters. Output of the molding machine and the intensive mold which fits with the mold stations is2 times and above greater than output of traditional equipment, but unit energy consumption of the invention is only 50-60% of unit energy consumption of traditional equipment.

The invention discloses a hydraulic energy-saving fuzzy control system for excavators, which comprises a fuzzy controller, a variable displacement pump regulator, a throttle controller, an engine, a pump and a pressure sensor; the fuzzy controller is connected with the variable displacement pump regulator, the variable displacement pump regulator is connected with the pump, the pump is connected with the pressure sensor, the pressure sensor is connected with the fuzzy controller, the fuzzy controller is also connected with the throttle controller, the throttle controller is then connected with the engine, and the engine is then connected with the pump. The hydraulic energy-saving fuzzy control system for excavators increases the energy transfer efficiency of the system, and reduces idle energy consumption inside a hydraulic transmission system.

The invention belongs to the technical field of motor starting devices and provides a power-consumption-free starter for a commercial refrigeration compressor. The power-consumption-free starter comprises a current transformer L1, a bidirectional controllable silicon T, an inductor L2, a PTC element and a starting capacitor C1. One end of a primary coil and one end of a secondary coil of the current transformer L1 and the T1 pole of the bidirectional controllable silicon T are jointly connected with one end of an alternating current power source. The other end of the primary coil of the current transformer L1 is connected with the leading-out end M of a main winding of the motor, the other end of the secondary coil of the current transformer L1 is connected with the G pole of the bidirectional controllable silicon T, the inductor L2, the PTC element and the starting capacitor C1 are sequentially in series connection between the T2 pole of the bidirectional controllable silicon T and the leading-out end S of an auxiliary winding of the motor, and the combined leading-out end L of the main winding and the auxiliary winding of the motor is connected with the other end of the alternating current power source. The power-consumption-free starter can effectively reduce consumption of reactive power and meet the requirements for energy saving and environment friendliness; a coil of the auxiliary winding can bear large current, and the electrical property is stable; the power-consumption-free starter is good in generality and high in safety.

The invention discloses a high-voltage aluminium electrolysis capacitor. The high-voltage aluminium electrolysis capacitor comprises a capacitor element, an electrolyte contained in the capacitor element, and an outer package which seals both the capacitor element and the electrolyte, wherein the capacitor element comprises an anode foil provided with an dielectric layer on the surface thereof, a cathode foil, and a diaphragm arranged between the anode foil and the cathode foil; the formation voltage of the anode foil is 950-1200vf; the electrolyte comprises the following components in percentage by weight: 63-75% of ethylene glycol or polyhydric alcohols, 4-15% of 24-50 carbon atom branched-chain binary or tricarboxylic acid ammonium salt, 1-10% of ammonium pentaborate, 1-12% of mannitol, and 0.2-1% of butyl phosphate; the conductivity of the electrolyte at 25 degrees centigrade is 0.1-0.4ms and the pH (potential of hydrogen) at 25 degrees centigrade is 5.8-7.8. As the formation voltage of the anode foil is 950-1200Vf and the electrolyte has very high flash fire voltage which can reach more than 700V, the capacitor has the working voltage of 700V, and the capacitor is effectively prevented from breakdown.

The invention relates to a demolding power device, in particular to a launch canister demolding power device. The launch canister demolding power device comprises a power source motor pumping set, an oil tank, a plurality of pipelines, a control valve set, an air cooler, an oil return filter, an oil suction filter and a demolding actuator. The power source motor pumping set is mainly composed of a motor, a bell jar, a constant pressure variable pump and an auxiliary connecting piece. The control valve set is used for achieving the functions of oil cleaning, demolding actuator conversion, adjustment of demolding power and demolding speeds and demolding pressure detection. The demolding power device can meet the requirements that the demolding power is adjustable, the demolding speeds are controllable, operation is stable, and starting and stopping impact is small. The demolding task requirement of a composite material launch canister with a large diameter, a heavy core mold, a long core shaft and a small draft angle can be met.

The invention discloses a method for improving blast furnace hearth cooling efficiency. The method comprises the following steps: dividing the periphery of a blast furnace into (iend+1) symmetrical vertical section areas, calculating the hearth temperature changes and temperature gradients of 2*(iend+1) points in the periphery of the blast furnace; carrying out grading evaluation on the hearth, wherein the temperatures can be divided into three grades: abnormally high temperature, abnormally low temperature, and normal temperature; finally calculating the occurrence numbers of the three situations and the ratios of the points with three temperature grades in all points, and re-adjusting the flow distribution of hearth cooling water according to weight coefficients sigma H, sigma M, and sigma L. According to the corrosion situation in hearth, the cooling water distribution in hearth can be dynamically adjusted to strength the cooling effect in heavy corrosion areas, at the same time, the cooling water consumption is reduced, the cooling performance of the blast furnace cooling system is improved, and the blast furnace heart is prevented from being burnt through.

The present invention discloses a gear transmission stepless automatic speed changer. It includes two planetary gear groups, self-locking mechanism and starter clutch. Every planetary gear group is composed of central gear, planetary gear, internal gear and planetary carrier. The central gear is meshed with planetary gear, the planetary gear is meshed with internal gear, the planetary carrier is coupled with gear shaft of planetary gear, and the planetary carriers of two planetary gear groups are formed into one whole body, its self-locking mechanism is mounted between two planetary gear groups.

The invention discloses an isometric segmentation method for aluminum electrolysis cell cathode steel rods. A segmentation gap between two sections of cathode carbon rods is equal to a gap between two sets of anode carbon blocks of an aluminum electrolysis cell; and the two sections of cathode steel rods are symmetrical about the center line of the cathode carbon blocks of the aluminum electrolysis cell. The method is wide in application range, is applied to the production for real measurement, reduces the production voltage fluctuation by near 50%, reduces the level current by about 30%, is more obvious in current stabilizing and energy saving effect, is convenient for segmentation technology operation, and needs no complex design and calculation.

The invention discloses a direct current deicing device for an ultra high voltage transmission line. The device consists of a first 24-pulse rectifying transformer (1), a second 24-pulse rectifying transformer (4), a first 12-pulse rectifier (2), a second 12-pulse rectifier (3), a third 12-pulse rectifier (5) and a fourth 12-pulse rectifier (6), wherein the first and second 12-pulse rectifiers (2 and 3) are connected in parallel with the first 24-pulse rectifying transformer (1) respectively; the third and fourth 12-pulse rectifier (5 and 6) are connected in parallel with the second 24-pulse rectifying transformer (4) respectively; the first 12-pulse rectifier (2) has a positive electrode A and a negative electrode B; the second 12-pulse rectifier (3) has a positive electrode C and a negative electrode D; the third 12-pulse rectifier (5) has a positive electrode E and a negative electrode F; and the fourth 12-pulse rectifier (6) has a positive electrode G and a negative electrode H. The device is wide in application range, high in cost performance, time-saving and labor-saving in operation, simple in maintenance, low in reactive power consumption and high in power factor.

The invention provides an electromagnetic power device, which produces combined ampere forces to reduce the self-weight of the device or produces powers in other directions through circuits of asymmetric closed loops containing capacitors and AC (alternating current) or pulse DC (direct current) power sources. By using the conventional electromagnetism principle, the suspense problem for overcoming gravity is solved. The electromagnetic power device has the advantages of obvious power production effect, low cost and wide potential application.

The invention provides a liquid metal battery module insulation box, comprising an outer wall layer, a composite insulation layer, a radiation-inhibitory reflecting layer and an insulation box inner chamber sequentially from outside to inside, wherein the composite insulation layer includes an inner mullite fiber insulation layer, a middle metal vacuum insulation layer and an outer mullite fiber insulation layer, or the composite insulation layer includes inner, middle and outer mullite fiber insulation layers; the radiation-inhibitory reflecting layer is a single-mirror-side stainless steel plate, and the mirror side is arranged inward; liquid metal battery modules are arranged in tiers in the insulation box inner chamber. The liquid metal battery module insulation box including the outer layer, the composite insulation layer, the radiation-inhibitory reflecting layer and the insulation box inner chamber sequentially from outside to inside is simple in structure and low in insulation power consumption, can be made larger in size and can meet the requirement for large size of liquid metal battery modules.

The invention provides a method for stabilizing continuous production of a 400 KA aluminum electrolytic cell. The method includes the following steps that firstly, the working voltage of the 400 KA aluminum electrolytic cell is increased to 10 mV to 15 mV, the temperature of the 400 KA aluminum electrolytic cell is 935-940 DEG C, the temperature of the ledge of the cell is 300-350 DEG C, the electrolysis temperature is increased to 939-943 DEG C, and heat insulation of the 400 KA aluminum electrolytic cell is strengthened; secondly, the molecular ratio is controlled to be increased to 2.55-2.60 from 2.45-2.50, and the adding amount of aluminum fluoride is reduced by 20-40 weight percent; thirdly, a discharging NB interval is adjusted, and the concentration of aluminum oxide is reduced to 1.5-2.0%; and fourthly, the automatic control rate of the 400 KA aluminum electrolytic cell is increased to 95-99% from 70-80%, and the effect coefficient of the 400 KA aluminum electrolytic cell is adjusted to be 0.03-0.05 from 0.1. According to the method, the service life of the electrolytic cell is prolonged, energy is saved, production stability of the electrolytic cell is improved, and efficient and stable production of the electrolytic cell is ensured.

A direct current power transmission system includes a first and a second converter station that are coupled to each other via a direct current link. Each converter station includes a first or second line commutated converter, respectively. Before power reversal the first converter is operated as a rectifier and the direct current is controlled in the first station, while the second converter is operated as an inverter and in the second station the extinction angle of the second converter or the direct voltage is controlled. After power reversal, the first converter is operated as an inverter and the second converter as a rectifier. During power reversal a change is carried out in the first station from control of the direct current to control of the extinction angle of the first converter or to control of the direct voltage, which is performed in synchronization with a change in the second station from control of the extinction angle of the second converter or from control of the direct voltage to control of the direct current.

The invention relates to an inductive modular multilevel converter of bridge arm reactors and belongs to the field of power conversion. The modular multilevel converter comprises three phase units, and each phase unit comprises a sub-module set (SMs) and one bridge arm reactor (L); each sub-module set is formed by serially connecting multiple sub-modules, one end of each sub-module set is connected with the corresponding bridge arm reactor, the other end of each sub-module set is connected with a direct-current side positive pole or negative pole of an MMC, magnetic fluxes generated by common-mode components in upper and lower bridge arm currents in an iron core are superposed, differential-mode components in the upper and lower bridge arm currents are manually offset, accordingly upper bridge reactance and lower bridge reactance are superposed in the direct-current side, and the upper bridge reactance and the lower bridge reactance are mutually offset in the alternating-current side. Therefore, when the alternating-current side of the MMC is connected with a passive load, internal reactance of the MMC is reduced, and reactive power provided by the MCM is reduced.

The invention discloses an electrolytic production device for a rare earth alloy. The electrolytic production device comprises a graphite electrolytic bath, graphite anodes stretching into the graphite electrolytic bath, and a cathode stretching into the graphite electrolytic bath, and further comprises a protective jacket and a rotating driving mechanism, wherein a thermal insulation layer is arranged between the protective jacket and the graphite electrolytic bath; and the rotating driving mechanism is in transmission connection with the graphite electrolytic bath, so that the rotating driving mechanism can drive the graphite electrolytic bath to rotate. According to the electrolytic production device, during the electrolytic process, the rotating driving mechanism drives the graphite electrolytic bath to rotate, an electrolyte in the graphite electrolytic bath is dynamic, carbide slag is not liable to generate on the back surfaces of the graphite anodes, the direct voltage and current transmission of the graphite anodes to the graphite electrolytic bath is obstructed, the reactive current consumption is reduced, and the purpose of energy consumption is achieved; and the direct voltage and current transmission of the graphite anodes to the graphite electrolytic bath is obstructed, so that the service life of the graphite electrolytic bath is further prolonged.

The invention relates to the technical field of oil field monitoring, in particular to an oil well failure intelligent analysis and decision system and method. The oil well failure intelligent analysis and decision system comprises a data collecting module, a remote measuring and controlling module, a server, a database connecting module and a function module. The data collecting module comprises an electrical parameter collecting module, a temperature sensor, a pressure sensor, a dynamic liquid level measuring instrument, an integrated dynamometer, a flow sensor and a combustible gas detector. The electrical parameter collecting module, the temperature sensor, the pressure sensor, the dynamic liquid level measuring instrument, the integrated dynamometer and the flow sensor are all in communication connection with the remote measuring and controlling module. A production database and an expert database are arranged in the server. The production database is in one-way communication connection with the data collecting module. The expert database is in two-way communication connection with the database connecting module. By building the oil field intelligent analysis and decision expert system, real-time monitoring, analyzing, fault diagnosing and predicting are conducted on the production parameters of an oil well, the cost of the oil field is saved, and manpower and material resources are saved.

The dry-type high-frequency high-voltage transformer structure (1) of the present invention is characterized by comprising an EE-type magnetic core (2), a square skeleton (3), a square coil (4) and afixed support device (6) and further comprising a lead-out copper bar or copper wire (7) of the coil, wherein the EE magnetic core (2) is formed by installing two E-type magnetic cores (21) in such away that the openings of the two E-type magnetic cores are opposite to each other and the two E-type magnetic cores are aligned in the vertical direction; the square skeleton (3) sleeves the central pillar of the EE-type magnetic core (2); the square coil (4) is a vertical structure and is formed by winding a combination of a low-voltage coil (41) and a high-voltage coil (42) around the square skeleton (3); and the high-voltage coil ( 42) and the low-voltage coils are alternately wound around the square skeleton (3). The dry-type high-frequency high-voltage transformer structure solves the performance defects of low transmission capacity, low step-up voltage, low efficiency, incapability of long-term operation and low reliability in the current high-frequency and high-voltage fields such that a high-frequency and high-voltage power supply can be used widely and reliably.

A vertical axis wind machine having controllable output power, comprising a wind machine base, and an integrated shaftless circular three dimensional framework having a rigid connection with an annular floating body; blades are installed on the three dimensional framework; the angles of attack of the blades are controlled via a computer; the wind machine base is provided with an annular groove with water; the annular floating body using the rigid connection to support the three dimensional framework is the bottom structure of the wind machine rotating body, and the shape of the annular floating body is consistent with the inner cavity of the annular groove; the angles of attack and lifting force direction of the blades installed on the wind machine can be automatically controlled by computer according to the momentary wind force on the blades; the blades of the wind machine are of a double-sided lift type; the lift-type blades are in the shape of wings, and the front edges thereof are normally in the windward direction, and the rear edges are in the downwind direction.

The invention discloses a material conveying device for a concrete batching plant. The material conveying device for the concrete batching plant comprises a material conveying barrel. A material inlet and a material outlet are formed in the material conveying barrel. A rotary shaft driven by a driving mechanism to rotate is arranged in the material conveying barrel. A plurality of screw blades are arranged on the rotary shaft. The screw pitches among the screw blades are gradually increased from the material inlet end to the material outlet end. According to the material conveying device for the concrete batching plant, due to the fact that the screw pitches among the screw blades are gradually increased from the material inlet end to the material outlet end, in the conveying process of a material, the material blocking problem caused in the material conveying process can be effectively avoided; the reactive power consumption is reduced. Meanwhile, the conveying of the material is accelerated, and the efficiency is improved.

The invention discloses an anode carbon block for a clamped anode conductive device. On the upper part of the anode carbon block, a circular carbon bowl for casting a phosphorus iron hoop by using rainwater is cancelled, and the upper part of the anode carbon block is provided with a convex clamping table in clamping connection with an anode conductive clamp; and the lateral surface of the convex clamping table on the upper part of the carbon block is provided with a lug boss retaining wall for preventing electrolyte from eroding the anode conductive clamp.

The invention relates to the technical field of mining round-link chain production equipment, in particular to a ring extruder for a chain ring of a round-link chain for processing and producing a flat chain. An existing ring extruder has a problem of defects in product quality and appearance as mandrels are separated up and down and are misplaced left and right. According to the technical scheme,the ring extruder comprises a rack, a movable rack, forming mechanisms, a resetting mechanism and a ring retracting mechanism. A first movable rack is arranged in the rack, the forming mechanism in avertical direction and the forming mechanism in a first horizontal direction are mounted on the movable rack, the forming mechanism in a second horizontal direction is formed on the rack, the movablerack moves along the extruding direction of the forming mechanism in the second horizontal direction in a chain ring extruding process and are matched with the forming mechanism in the vertical direction and the forming mechanism in the first horizontal direction, so that the extruding force of the chain ring and plastic deformation tension generated by the extruded chain ring are balanced by theforming mechanism on the rack and the movable rack in the respective directions. A phenomenon that the mandrels are separated is avoided, and the mechanical efficiency and the product quality are improved greatly.

The invention discloses a method and system for controlling stability of voltage of an ultra-high-voltage direct-current layered feed-in power grid, and belongs to the technical field of electrical power systems. The method comprises the following steps: acquiring a low-value threshold UcthL, a high-value threshold UcthH and a set time threshold delta Teth of a voltage Uc of commutation buses of ahigh-end inverter and a low-end inverter; monitoring the voltage Uc of the commutation buses of the high-end inverter and the low-end inverter and the lasting time delta Te of the voltage Uc in realtime by using a voltage acquiring and measuring device; and when the voltage Uc of the commutation buses of the high-end inverter and the low-end inverter is smaller than the set low-value threshold UcthL and the lasting time delta Te is longer than the set time deltah Teth, starting direct-current power emergency fall-back control, and when the voltage Uc of the commutation buses of the high-endinverter and the low-end inverter recovers to be increased and is greater than the high-value threshold UcthH and the lasting time delta Tr is longer than the set time threshold delta Trth, starting direct-current power slow-speed increasing control. The stability of the voltage of the ultra-high-voltage direct-current layered feed-in power grid is controlled, and stable running of an alternating-current and direct-current parallel and series system is ensured.

A plasma display panel, includes rear and front substrates facing each other with a predetermined interval therebetween, barrier ribs between the rear and front substrates to define discharge cells, address electrodes on the rear substrate, the address electrodes extending in a first direction to correspond to the discharge cells, display electrodes on the front substrate, the display electrodes extending in a second direction to correspond to the discharge cells, the second direction intersecting the first direction, and a dielectric layer on the front substrate to cover the display electrodes, the dielectric layer having a dielectric constant of about 6 C2 / N·m2 to about 7 C2 / N·m2 and a thickness of about 16 μm to about 20 μm.

The present invention relates to a short net side low voltage dynamic reactive power compensation system in the metallurgical industry. Defects of low furnace transformation efficiency, oversized reactive power compensation and comparatively serious three-phase unbalance caused by a low equipment natural power factor in a power supply system in the present metallurgical industry are solved. The system comprises a high voltage power supply network system, a short net system which is in series connection with the high voltage power supply network system, and metallurgical equipment which is in series connection with the short net system. The metallurgical equipment is in parallel connection with a low voltage dynamic compensation device. Both the short net system and the metallurgical equipment are in parallel connection with a furnace transformation system. A high voltage side of the furnace transformation system is connected to the high voltage power supply network system. The metallurgical equipment and the low voltage dynamic compensation device are connected in series. A large amount of reactive current directly passes through a loop formed by a low voltage capacitor and the metallurgical equipment, without passing through the short net system, the furnace transformation system and the high voltage power supply network system, while improving the power factor, active output rate of furnace transformation can be improved, and the reactive power consumption of furnace transformation and the short net can be reduced.

The invention discloses a soft switching high-efficiency wireless charging method based on bilateral phase shifting and frequency adjusting. The DC side of a sending end converter and the DC side of areceiving end converter of a wireless charging system are each connected with a soft switching auxiliary branch circuit, by reasonably controlling the on and off of an auxiliary switching tube and resonating the voltage of a bridge arm into zero before the switching tube is switched on, the zero-voltage on of all sending end switching devices and receiving end switching devices is realized. Meanwhile, according to the soft switching bilateral phase shifting control system, by means of the frequency adjusting method, the switching frequency is the same as the resonating frequency all the time,the loss problem caused by the idle work under detuning can be avoided, and efficiency is further improved. The method is simple in structure and convenient to implement, the soft switching work of the power converters of the wireless charging system is ensured, the partial efficiency of the converters is improved, and the low-reactive loss of original side coils and auxiliary side coils is realized through the frequency adjusting and phase shifting control mode.