38results about How to "Reduce running loss" patented technology

The invention relates to the technical field of motor control, and discloses a control method and system of a permanent magnet direct current brushless slotless motor. The method comprises the following steps: performing temperature compensation and signal filtering on voltage data of a Hall sensor to obtain rotor position information and temperature characteristic data; performing magnetic field intensity dynamic compensation calculation according to the rotor position and the temperature data to obtain magnetic field intensity parameters; adjusting the amplitude and phase of the three-phase current according to the magnetic field intensity parameter, and generating a current control quantity; extracting and compensating a harmonic component to obtain a torque smooth control instruction; all losses are calculated and optimized, and efficiency optimization parameters are generated; and performing feature extraction and anomaly judgment on the operation parameters, and outputting a protection control strategy. Accurate detection of motor position signals, stable control of torque, optimal control of loss and real-time monitoring and protection of abnormal states are achieved under the high-temperature working condition, and therefore stable operation and the service life of the motor under the high-temperature environment are guaranteed.

The invention discloses a reconfiguration-based operation optimization method for a power distribution system containing a reconfigurable soft switch. The method comprises the following steps of: 1, constructing a self-energy-storage type reconfigurable intelligent soft switch topology based on asymmetric voltage source converter capacity and feeder line selection; 2, modeling is carried out on the self-energy-storage recombined intelligent soft switch; and 3, modeling the reconfiguration-based flexible power distribution system containing the reconfigurable soft switch, and obtaining an optimal operation strategy of the power distribution system by solving the optimization operation model. According to the invention, the multi-element controllable equipment of the power distribution system can be reasonably utilized to improve the utilization rate of the traditional multi-terminal intelligent soft switch to the capacity of the voltage source converter, and the maximum transmission power of the traditional multi-terminal intelligent soft switch can be improved, so that the operation loss of the power distribution system can be reduced, and the new energy consumption can be improved.

The invention discloses an improved SSA-BP-based photovoltaic array dust deposition prediction method, which adopts a method of combining a sparrow search algorithm and a BP neural network, and introduces Levy flight optimization SSA to enhance global search capability and local development capability and improve the problems of excessive gathering, diversity reduction and easy falling into local optimum when approaching an optimal position. The convergence precision is improved, and the optimal weight and threshold of the BP neural network are obtained by adopting the algorithm; and meanwhile, an electrical detection method principle is utilized, a simulation model is established in MATLAB / Simulink to analyze output PV and IV curves of the photovoltaic array in different fault states, characteristic quantities are extracted, sample data are acquired, and the algorithm is utilized to perform classification prediction on the data, so that the photovoltaic dust deposition degree and the shadow shielding condition are conveniently and accurately identified, and the accuracy of the detection result is improved. The optimal cleaning period is determined, the operation loss is reduced, and the economic benefit is improved.

The invention provides an underwater robot power supply system and a power supply control method, and the system comprises a common power supply connection bus point, the common power supply connection bus point is connected with a power adjusting and starting loop, a load power utilization main circuit, a first power utilization common connection point, a second power utilization common connection point and a third power utilization common connection point. And the power regulator is used for carrying out switching-off, switching-off and switching-on control processing on the switches of the main power utilization main circuit and the branch circuit according to the control mode. The method has the beneficial effects that the investment of early-stage equipment of an underwater robot system and a marine power matched generator set is reduced, the starting current in the operation stage and the loss during operation are reduced, the system electric energy quality is improved, the equipment operation cost is reduced, and the service life is prolonged.

The self-adaptive reclosing hybrid direct-current circuit breaker suitable for the direct-current power transmission and distribution system has a two-stage current limiting function and comprises a first-stage current limiting branch and a second-stage current limiting branch, the defect of a single fixed current limiting mechanism of an existing circuit breaker can be overcome by adopting two-stage current limiting, and when faults of different types and different severity occur, the current limiting mechanism can be changed, and the current limiting mechanism can be changed. The current change rate and the change range at the moment of a fault are large, the two-stage current limiting structure can preliminarily limit the rapid change of the fault current through the first-stage current limiting branch after the fault occurs, then the fault current is limited step by step through the two-stage current limiting structure, and the purpose of stably limiting the current is achieved. And energy impact and electromagnetic interference on other elements and equipment in the circuit caused by sudden, large and rapid change of the current are reduced. The structure of the fault discrimination branch circuit does not need to use a power supply to charge a capacitor C3, and only uses the inductance energy of a fault side line, thereby effectively avoiding the waste of energy.

The invention belongs to the technical field of oil and gas leakage detection and alarm, and particularly relates to a safety valve inner leakage detection prompt sealing gasket and a use method.The safety valve inner leakage detection prompt sealing gasket comprises a sealing washer, a reinforcing ring is embedded in the inner ring of the sealing washer, and a diaphragm piece is fixedly connected to the inner side of the reinforcing ring; the blowing end of the sound production part faces the inner cavity of the safety valve and is used for ensuring that gas from the inner cavity of the safety valve blows the sound production part, and a plurality of cracking grooves are uniformly formed in the diaphragm piece in the radial direction; the safety valve can give a sound alarm when small flow passes through and give a fracture alarm when large flow passes through, can timely discover internal sealing leakage caused by environmental temperature, valve body quality, spring failure, unreasonable adjustment and the like in the production process of the safety valve, especially can timely discover small leakage, provides timely discrimination capability for production abnormity, and improves production efficiency. Production operation and maintenance activities are greatly facilitated, material loss is reduced, production is stable, and the operation and maintenance cost is reduced.

The utility model discloses continuous catalyst feeding equipment which comprises a catalyst tank, a first discharging pipe is arranged at the bottom of the catalyst tank, a second control valve is installed on the first discharging pipe, a discharging pipeline is connected to the bottom of the first discharging pipe, a discharging device is connected to the lower portion of the discharging pipeline, and a second control valve is installed on the second control valve. The continuous catalyst feeding equipment comprises a discharging device, a fixed air pipe is embedded in the side face of the discharging device, the lower end of the fixed air pipe is connected with an air blowing pipeline located in an inner cavity of the discharging device, and a plurality of air blowing holes are downwards formed in the circumferential face of the air blowing pipeline. The feeding position of the catalyst in the FCC device is changed, the catalyst is not directly injected into the regenerator any more, the catalyst is injected into the settler with the mild temperature condition, and meanwhile, the fresh catalyst is conveyed by adopting nitrogen, dry gas or high-temperature steam, so that the heat collapse rate of the fresh catalyst is reduced, and the loss of the catalyst is reduced.

The invention relates to the technical field of rana nigromaculata slaughtering, in particular to a rana nigromaculata slaughtering machine. Comprising a rack, and a supporting plate, a rolling belt, a blade, a viscera removing piece, a conveying belt, a push rod, a pneumatic clamping jaw, a head removing blade and the like are arranged above the rack; the lower portion of the supporting plate is driven by a rolling motor, so that the rolling belts on the two sides rotate at the same rotating speed. The rana nigromaculata is clamped by the rolling belts on the two sides and conveyed along a straight line, belly opening and viscera removing operation is sequentially completed, then the rana nigromaculata is conveyed to the baffle through the conveying belt to be subjected to peeling and head removing, the rana nigromaculata is pushed out through the push rod after peeling and head removing are completed, and continuous slaughtering of the next rana nigromaculata is achieved circularly. The device has the advantages of short time consumption, high efficiency, low labor cost, small operation difficulty, small occupied area, simple structure, high automation degree and the like, can meet the large-scale slaughtering requirements of rana nigromaculata, and has a good application prospect.

The invention relates to the technical field of electric energy routers, in particular to a power distribution area flexible mutual aid system based on an electric energy router, and the system is characterized in that a DC bus in a flexible mutual aid device is connected with an external power distribution area through a plurality of bidirectional DC / AC ports, and is used for completing electrical coupling and power intercommunication; the plurality of bidirectional DC / AC ports are connected with the direct current bus in parallel, the direct current bus is connected with an energy storage port and a photovoltaic port, the energy storage port is communicated with an external energy storage device, the photovoltaic port is communicated with an external photovoltaic device, and the flexible mutual aid device is communicated with an external power grid dispatching through a controller. According to the invention, normalized flexible interconnection between feeder lines is realized through the flexible mutual aid device, potential safety hazards caused by frequent displacement of a conventional switch based on an interconnection switch are avoided, the control flexibility and rapidity of the power distribution network are improved, and the power distribution network has the advantages of open-loop operation and closed-loop operation at the same time.

The present invention relates to a method for converting methanol to olefins, which comprises: allowing a raw material containing methanol to enter a fluidized bed reactor, contacting with a catalyst, and generating an olefin product, wherein the process causes the catalyst to be at least partially deactivated to form an at least partially deactivated catalyst; allowing a catalyst to be regenerated from the at least partially deactivated catalyst to enter a regenerator for regeneration, thereby forming a regenerated catalyst, and allowing an activated catalyst from the regenerated catalyst to return to the reactor via a regenerated catalyst pipeline; characterized in that, on the regenerated catalyst pipeline, the volume content of oxygen in the gas phase component at the outlet of the regenerated catalyst pipeline is controlled to be less than 0.1%, preferably less than 0.05%, and more preferably less than 0.01%.

The invention discloses an air supply device and method for automatically adjusting the air supply amount and the oxygen content based on the boiler temperature. The device comprises a draught fan, an air supply pipeline, an auxiliary oxygen pipeline, an adjusting mechanism, an air storage part, a heating part and a thermal expansion and cold contraction part. One end of the air supply pipeline is communicated with the fan, and the other end is butted with a boiler air inlet; two ends of the auxiliary oxygen pipeline are respectively communicated with the air storage cavity of the air storage part and the air supply pipeline; the heating piece is assembled on the gas storage piece and is used for heating oxygen in the gas storage cavity and the thermal expansion and cold contraction piece; the heat expansion and cold contraction piece is fixedly connected with the sealing plate, the sealing plate can be driven to move in a reciprocating mode through the heat expansion and cold contraction effect so as to adjust the through-flow area of a communication channel between the gas storage cavity and the auxiliary oxygen pipeline, the heat expansion and cold contraction piece and the draught fan cooperate to achieve automatic adjustment of the air supply amount and the oxygen content based on the boiler temperature, manual intervention is reduced, and the efficiency is improved. The service life of equipment is prolonged, and stable and efficient operation of the boiler is guaranteed.

The utility model relates to the technical field of feeders, and discloses a vibration feeder convenient to adjust, which comprises a vibration assembly and a screening assembly, the screening assembly is arranged on the inner walls of the two sides of the vibration assembly, the vibration assembly comprises a side plate, and a feeding notch is welded at the tail end of the top of the side plate. A slope sliding plate is welded to the feeding notch and the inner wall of one side of the side plate, a sieve plate is fixedly installed on the inner walls of the two sides of the top of the side plate, a row of classification blocks are evenly arranged on the outer wall of the bottom of the sieve plate, an upper-layer inclined plate and a bottom-layer inclined plate are arranged on the inner walls of the two sides of the bottom of the side plate, and a certain gap exists between the upper-layer inclined plate and the slope sliding plate. The large materials move backwards under the vibration effect and slide downwards to the bottom layer inclined plate along the inclined plane sliding plate, the small particle materials screened by the screen plate fall to the upper layer inclined plate, preliminary classification is achieved, through vibration of the screen plate, the large materials move backwards and slide to the bottom layer inclined plate through the inclined plane sliding plate, and the small particle materials fall to the upper layer inclined plate. And automatic classification is realized.

The invention provides a reactive compensation voltage regulation device and system for a small low-voltage power grid, and belongs to the technical field of reactive compensation of power systems. The device comprises a microprocessor, a voltage sampling module and a plurality of capacitor branches connected in parallel; one path of the fuse of each capacitor branch is connected to the live wire of the confluence busbar, the other path of the fuse is connected to the input end of the voltage sampling module, one path of the capacitor of each capacitor branch is connected to the zero wire of the confluence busbar, and the other path of the capacitor is connected to the input end of the voltage sampling module; the microprocessor determines a phase voltage and a load reactive power according to the obtained incoming current and compensation current of the reactive compensation voltage regulation device and the total afflux voltage of each capacitor branch; and controlling a relay of the capacitor branch to execute switching according to the phase voltage and the load reactive power. Based on the device, the invention also provides a reactive compensation voltage regulation system. According to the invention, the requirements of reactive compensation precision and response speed in a low-voltage small power grid environment are met.

The application discloses a trigger optimization operation method suitable for a hybrid power grid commutation converter. When detecting that a fault occurs in an inverter-side alternating current system, a synchronous commutation voltage phase value corresponding to a current to-be-conducted bridge arm is assumed as a trigger angle to trigger, then a prediction means is used to obtain specific conditions of a supplied commutation area and a demanded commutation area in a next commutation process after triggering, and whether triggering is executed at present is judged based on the specific conditions. If the specific conditions do not satisfy preset optimal trigger conditions, a pulse signal is blocked, phase value updating is waited for, and the same operation of the new trigger angle corresponding to the phase value is executed until the preset conditions are satisfied. When the conditions are satisfied, a trigger pulse signal is directly sent to perform actual triggering, so that an optimal trigger time is found. The application can significantly improve the power transmission capacity of a direct current power transmission system during a fault in the inverter-side alternating current system, and improve the ability of the hybrid power grid commutation converter to resist commutation failure.

This invention discloses a soil monitoring sampling device with linked filtration and cleaning functions, belonging to the field of soil monitoring. It includes a base plate, with a bracket fixedly installed on the top of the base plate. A lifting assembly is mounted on the bracket, and a first motor is mounted on the lifting assembly. An installation plate is fixedly installed at the output end of the first motor. Upon startup of the second motor, two core operations can be driven simultaneously. Firstly, through the meshing transmission of a first rotating rod, a first bevel gear, and a second bevel gear, a rotating rod and a notched disc cam rotate, cooperating with a first spring to achieve reciprocating vibration of the filter screen, completing the soil sample screening operation. Secondly, through the transmission action of the first rotating rod, a first transmission wheel, a transmission belt, and a second transmission wheel, a second rotating rod and a cleaning brush rotate, achieving the cleaning operation of the outer surface of the sampling tube. The two operations are performed synchronously and in coordination, reducing the number of power components and simplifying the overall structure of the device.

The invention discloses a power distribution network flexible networking method based on a decision converter model, and the method comprises the steps: obtaining historical operation data of a power distribution network in a normal operation state and a fault operation state, and constructing an expert data set based on the historical operation data; dividing the expert data set into discrete data and continuous data, performing marking processing, and uniformly converting the discrete data and the continuous data into a discrete integer marking sequence to construct a training sample set; constructing a decision converter model comprising an encoder, a converter and a decoder; extracting training samples from the training sample set in batches to train a decision converter model; and performing recursive solution on a flexible networking problem in a real-time operation scene of the power distribution network by using the trained decision converter model, and outputting an approximate optimal decision scheme for flexible networking of the power distribution network. According to the method, the flexible networking decision scheme of the power distribution network can be quickly generated under different operation conditions such as a normal operation state and a fault operation state of the power distribution network, and the operation economy and the operation reliability of the power distribution network are improved.

The application discloses a heat management system, an energy storage system and a heat management method thereof, and belongs to the technical field of heat management. The heat management system comprises a compressor, a first heat exchanger, a power module, a second heat exchanger and a battery cooling module which are connected in series into a circulating loop. In the first working mode, the heat management system exchanges heat between the battery and the power module by using compression refrigeration. In the second working mode, the battery and the power module exchange heat by using liquid cooling heat exchange respectively. In the third working mode, the heat management system exchanges heat between the power module by using compression refrigeration and exchanges heat between the battery by using liquid cooling heat exchange. The integration of the power module and the battery cooling module can reduce the number of components, and the liquid cooling loop of the power module does not need to be arranged separately, so that the layout of the heat management system is more compact, the occupied space is reduced, and thus the cost, the operation loss and the refrigerant leakage risk can be reduced, and the stability and reliability of the heat management system are improved.

The utility model provides an anti-disproportionated resin adsorption column, which relates to the technical field of polycrystalline silicon, and comprises a shell, a plurality of resin adsorption columns and a plurality of resin adsorption columns, a resin filling area is arranged between the material inlet and the material outlet, and the resin filling area is communicated with the resin inlet; the feeding distributor is connected with the material inlet; the discharge distributor is connected with the material outlet; wherein the feeding distributor comprises a feeding main pipe, a plurality of feeding distribution holes are uniformly distributed in the feeding main pipe, and feeding wedge-shaped wire filter pipes are in threaded connection with the feeding distribution holes and are fixedly welded to the feeding distribution holes. An original water cap is changed into the wedge-shaped wire filter pipe, so that the phenomenon of loss of resin is effectively reduced, the filter area is increased, and local pressure drop is also reduced. The feeding wedge-shaped wire filter pipe and the discharging wedge-shaped wire filter pipe are mounted in a welding manner, so that the loss amount of resin is reduced, the purchasing and filling cost of the resin is saved, and the maintenance frequency of downstream equipment is reduced.

The present application relates to the field of smart grid and distribution network flexible control technology, and particularly relates to a voltage and reactive power collaborative management adaptive control method for distribution network, which freezes the shunt compensation control state before the gear switching by identifying the transition state of the equivalent impedance of the distribution network in the gear switching process of the series compensation unit; and establishes the mapping relationship between the control reference state before the switching and the operation state of the distribution network after the switching according to the target compensation gear, to generate the initial control reference state after the switching; then the initial control reference state after the switching is used to maintain the stable compensation output of the shunt compensation unit, and the dynamic correction is carried out after the distribution network exits the equivalent impedance transition state, to realize the smooth transition to the steady-state compensation output; the present application can reduce the control state mismatch and compensation output mutation caused by the gear switching, and improve the dynamic stability and power supply quality in the voltage regulation and reactive power compensation collaborative management process.

The utility model discloses a hydrogen peroxide production oxidation tail gas energy recovery device which comprises a cold box, the cold box is sequentially communicated with a first aromatic hydrocarbon separation tank and a tail gas turbine expansion generator through pipelines, and a discharge port of the tail gas turbine expansion generator is communicated with a second aromatic hydrocarbon separation tank through a pipeline. And the second aromatic hydrocarbon separation tank is respectively communicated with the cold box and the tail gas unit through pipelines. According to the utility model, oxidized tail gas pressure energy and heat energy are recovered for power generation, and the power consumption per ton of hydrogen peroxide is reduced by 10kw. The temperature of oxidized tail gas entering a tail gas unit is reduced, the adsorption effect is improved, the VOCs content of tail gas emission is reduced, and the loss of an aromatic solvent is reduced.

The present invention belongs to the technical field of energy storage equipment planning, and specifically relates to a method and system for energy storage equipment planning of a medium and low voltage AC / DC hybrid distribution network. The method includes, in the planning layer, taking an annual cycle and the minimum comprehensive planning cost as the goal, deciding on a solution for converter capacity, energy storage equipment capacity and line model, and transmitting the solution to the operation layer, clustering based on the historical data of DG output and load to obtain multiple typical scenarios of "source-load", and optimizing the results with the goal of minimizing the operating cost of each typical scenario. The planning layer multiplies the normal operating loss of the distribution network of each typical scenario by the corresponding number of days and then adds them to obtain the distribution network operating cost, and determines the feasibility level of the solution. The present invention solves the problem that the energy storage planning in the traditional hybrid power grid is not accurate enough and cannot cope with complex multi-objective optimization requirements, and helps to ensure that the energy storage system can maintain stable and efficient operation under a variety of complex conditions.

The invention discloses a method and device for reducing loss, preventing explosion and prolonging the service life of a cable sheath protector, and the method comprises the steps: S1, constructing a protection device voltage reduction circuit which comprises a resistor Rg and a capacitor Cg connected with the resistor Rg in parallel, the resistor Rg has a preset resistance characteristic, and the capacitor Rg has a preset capacitance characteristic; s2, constructing an equivalent circuit of the cable sheath protector, wherein the equivalent circuit of the cable sheath protector comprises an equivalent resistor Rcsp and an equivalent capacitor Ccsp connected with the equivalent resistor Rcsp in parallel; and S3, the protection device step-down circuit and the cable sheath protector circuit are connected in series, so that the voltage at the two ends of the cable sheath protector can be automatically adjusted according to the preset resistance characteristic and capacitance characteristic. According to the invention, the operation loss of the cable sheath protector can be reduced, misoperation during power frequency overvoltage and lightning overvoltage is prevented, and the service life of the cable sheath protector is prolonged.

The application relates to the technical field of power distribution equipment, and discloses a high-energy-efficiency intelligent hybrid type terminal voltage management device for distribution areas, which comprises a current and voltage sampling module, an intelligent voltage regulating controller module, a voltage regulating transformer module and an intelligent capacitor bank connected to a terminal line of a distribution area; further comprises an environment regulation unit, a safety protection unit, a seamless bypass unit and an Internet of Things remote control device; the current and voltage sampling module is used for collecting electrical parameters of the distribution line, and the intelligent voltage regulating controller module is used for overall planning and control of the voltage regulating transformer module and the intelligent capacitor; the terminal voltage regulation and dynamic reactive power compensation are realized; the device is combined with hierarchical temperature control, low-temperature anti-freezing, multi-stage safety protection and Internet of Things remote control; the device has local man-machine interaction and fault bypass switching functions, is reliable in operation, high in integration, strong in intelligence and wide in adaptability, and is suitable for terminal voltage management and power quality optimization of various urban and rural low-voltage distribution areas.

This invention belongs to the field of power technology, specifically relating to a method, system, equipment, and medium for regulating the power of electric vehicle charging piles. The method includes the following steps: acquiring historical power grid operation data for each distribution area and establishing an objective function; obtaining a Pareto optimal solution set using a multi-objective optimization method based on particle swarm optimization algorithm according to the objective function; calculating the per-unit voltage values ​​of all distribution network nodes in each time period based on the Pareto optimal solution set; selecting solutions where no voltage crossover occurs at the per-unit voltage values ​​of the distribution network nodes, calculating the corresponding total voltage deviation; selecting the solution with the smallest total voltage deviation as the optimal solution for day-ahead optimization; and controlling the charging and discharging of the charging piles according to the optimal solution for day-ahead optimization. Accuracy is improved by filtering the Pareto solution set obtained from the multi-objective optimization results.

The lifting packaging machine comprises a machine frame, a lifting device, a film feeding device and a heat sealing device, the lifting device, the film feeding device and the heat sealing device are installed on the machine frame, the lifting device comprises a lifting frame arranged on the machine frame in a lifting and sliding mode, and a material storage mechanism is arranged in the lifting frame; the material storage mechanism comprises a plurality of material storage cavities used for independently storing packaging materials, a feeding assembly allowing the packaging materials to enter each material storage cavity and a plurality of discharging assemblies communicating with the material storage cavities, and the multiple discharging assemblies and the multiple material storage cavities are arranged in a one-to-one correspondence mode. The lifting frame is provided with a control assembly which is matched with the discharging assembly and controls the discharging assembly to be switched between the opening state and the closing state. The packaging machine has the following advantages and effects that the output efficiency of single lifting can be improved, so that the overall processing efficiency of the packaging machine is improved, and the operation loss of equipment is reduced.

The utility model relates to the technical field of cable conductors, in particular to an energy-saving consumption-reducing monofilament mixed stranded cable conductor, which comprises a conductor, the conductor comprises a plurality of buckle type special-shaped monofilaments and a plurality of circular monofilaments, the cross section of each circular monofilament is circular, and the buckle type special-shaped monofilaments are interlocked and meshed. The utility model has the following advantages: (1) buckle type special-shaped monofilaments and round monofilaments with specific specifications are produced, the number of filaments is small, the number of times of wire drawing and die changing is small, the production efficiency can reach the round monofilament wire drawing capacity and production efficiency on the premise that two wire drawing machines are matched, the capacity is high, the requirement on equipment is low, and the requirement on the operating skill of workers is not high; and (2) low-oxygen copper and oxygen-free copper are adopted, only the inner-layer circular monofilament needs to be replaced when the resistor richness is too large or too small, the inner-layer circular monofilament is easy to repair, the later-period out-of-period problems are few, the after-sale cost is reduced, and copper material consumption can be saved to the maximum extent.

The present application relates to the technical field of industrial big data, and particularly to a transformer loss reduction intelligent control method and system based on a power generation end, comprising: establishing an industrial big data set of source-load space-time association and establishing an operation benchmark, synchronously monitoring real-time electrical parameters; performing load component decoupling, stripping basic load components and extracting power fluctuation deviation parameters; reconstructing equivalent control power of the power generation end based on a nonlinear fluctuation compensation strategy; constructing a power grid energy efficiency function to perform loss minimization optimization, determining a power supply voltage setting value and driving on-load voltage regulation. The present application solves the problem that traditional methods are difficult to cope with random fluctuations of load through multi-dimensional data fusion and nonlinear load reconstruction, realizes collaborative optimization of transformer loss and line transmission loss, and effectively reduces the operation energy consumption of the power supply loop of the power generation end.

The invention discloses a multivariable cooperative control method and system for a wind generating set, and relates to the field of wind generating sets, and the system comprises a fusion module which is used for collecting the wind speed, rotating speed, pitch angle, cabin vibration and power grid voltage signals of the wind generating set, and carrying out the normalization processing of each signal, so as to construct a multi-dimensional data matrix; the analysis module is used for receiving the multi-dimensional data matrix, mining a nonlinear association relationship among variables in the multi-dimensional data matrix and outputting a quantized coupling coefficient table and an association direction identifier; according to the multi-variable cooperative control method, the nonlinear incidence relation between the variables is deeply mined by accurately collecting and optimizing the multiple types of operation signals, scientific disassembly of the total power adjustment target is achieved, the accuracy of multi-variable cooperative control is effectively improved, and the influence of variable coupling interference on the adjustment effect is greatly reduced.

The embodiment of the invention discloses a low-voltage power distribution network master-slave split-phase flexible interconnection control method and system, and the method comprises the steps: carrying out the sequence component decomposition of three-phase currents of two transformer areas, and obtaining a to-be-compensated negative-sequence current and a to-be-compensated zero-sequence current; solving to-be-compensated load current and voltage-stabilized load current according to the target power needing to be transmitted in the two transformer areas; calculating a compensation current reference value according to the to-be-compensated negative sequence current, the to-be-compensated zero sequence current, the to-be-compensated load current and the voltage-stabilized load current; if the compensation current reference value is changed, obtaining a maximum phase compensation current reference value; and performing compensation current control on the master-slave back-to-back voltage source type converter according to the rated current of the master back-to-back voltage source type converter and the maximum phase compensation current reference value. According to the invention, flexible capacity expansion and three-phase imbalance treatment of the power distribution network are synchronously solved at low cost when the overall configuration capacity is relatively low, the problems of light load, heavy load and three-phase imbalance of the transformer area are solved, and the flexibility and expandability of the system are improved through master-slave combined control.

The invention discloses a variable structure self-energy-storage type multi-port soft switch and an optimal operation method in a power distribution network. The method comprises the following steps: 1, constructing a mathematical model of the variable structure self-energy-storage type multi-port soft switch; 2, power distribution system regulation and control equipment is arranged, and models of all kinds of equipment are established; 3, based on the structure self-energy-storage type multi-port soft switch model and the power distribution system regulation and control equipment model, considering optimal power flow distribution, and establishing a power distribution network optimization operation model containing a variable structure self-energy-storage type multi-port soft switch; and 4, converting the power distribution network optimization operation model based on the power distribution network optimization operation model containing the variable structure self-energy-storage type multi-port soft switch established in the step 3, thereby establishing the mixed integer programming model containing the variable structure self-energy-storage type multi-port soft switch power distribution network optimization operation. According to the TS-SOP model established by the invention, the flexibility of transmission power is further improved, the no-load loss can be reduced by considering the power-off capacity of the converter, and the economical efficiency of system operation is finally enhanced.