22results about How to "Reduce power fluctuations" patented technology

The invention provides a layered optimization scheduling method and system for a wind power cluster and a medium, and relates to the technical field of power system optimization scheduling, and the method comprises the steps: determining evaluation indexes, obtaining the variable weight of each evaluation index, employing a membership function and a fuzzy comprehensive evaluation method, and obtaining the variable weight of each evaluation index; obtaining a membership score of each wind power plant of the wind power cluster under each evaluation index, and obtaining a comprehensive degradation score of each wind power plant; taking the ultra-short-term power predicted value of the wind power plant as the basis for judging the power change trend of the wind power plant, determining the climbing classification of the wind power plant, and determining the scheduling sequence of the wind power plant; on the premise that the power balance constraint between the wind power plants is met, the total output power of all the wind power plants is adjusted and controlled in real time according to the dispatching requirement for power increasing or power reducing of the wind power cluster and based on the dispatching sequence of the wind power plants of all the wind power plant groups. According to the method, the time-varying property and uncertainty of the wind power plant are fully considered, and the fatigue and fluctuation conditions of the whole wind power cluster are reduced.

The invention provides a distributed photovoltaic energy efficiency dynamic monitoring method based on time sequence analysis, and relates to the technical field of photovoltaic power generation, and the method comprises the steps: deploying an edge calculation node, regularly receiving the electrical operation parameters of a photovoltaic inverter, and recording a monitoring node; predicting photovoltaic output power according to the electrical operation parameters, and obtaining predicted output power; analyzing the power supply log, obtaining actual output power under the monitoring node, forming energy efficiency analysis data based on the monitoring node, the predicted output power and the actual output power, and storing the energy efficiency analysis data in an energy efficiency analysis database; performing power prediction deviation analysis by using the energy efficiency analysis database, and constructing a time period-deviation comparison table; and when grid-connected scheduling is carried out on the distributed photovoltaic equipment, power output compensation is carried out based on the time period-deviation comparison table. The technical problem that the power prediction precision is insufficient due to the fact that a traditional time sequence analysis method lacks accurate analysis for different time periods is solved, and the power prediction accuracy and the grid-connected dispatching quality are improved.

The invention discloses a power scheduling method and device based on a flexible load and pumped storage, and terminal equipment, and the method comprises the steps: taking the maximum flexible load income in a scheduling period as a first target, taking the minimum output fluctuation variance in the scheduling period as a second target, constructing a cooperative scheduling model, and solving the cooperative scheduling model, obtaining a load scheduling result in the scheduling period, a power generation power value of the target pumped storage power station in the scheduling period and a power utilization power value of the target pumped storage power station in the scheduling period; and then, according to a scheduling result, regulating and controlling a reducible load, a transferable load and a transferable load, and according to the power generation power value and the power utilization power value, controlling a target pumped storage power station. According to the method, pumped storage is combined with three types of flexible loads including the transferable load, the transferable load and the reducible load to cooperatively perform power scheduling, so that the power system can keep stable power output under different working conditions.

The utility model discloses an emergency gear-shifting shifting fork system, relates to the technical field of power transmission devices, and aims to solve the problems that the load on a transmission shaft is relatively large and the transmission shaft vibrates and spreads to damage a gear-shifting shifting fork in emergency gear-shifting reconditioning. According to the emergency gear-shifting shifting fork system, the gear-shifting gear sleeve, the butt-joint gear sleeve and the emergency gear are arranged, so that the influence of environmental factors on emergency gear-shifting transmission is reduced, and the reliability of emergency gear-shifting transmission is improved; and the servicing weight of the emergency gear shifting fork structure is reduced, the load pressure of a gear shifting fork system on a power source is reduced, and the possibility that the power source of a transmission shaft is influenced by accidental transmission movement of an emergency gear shifting system is reduced. By arranging the limiting pin and the shifting fork shaft, the possibility that mechanical movement such as vibration of a transmission system spreads to emergency shifting is reduced, the possibility that the servicing state of an emergency gear shifting system fails is reduced, and the maintaining effect of the emergency function of gear shifting preparation is improved.

The application relates to an intensive transient disturbance regulation circuit, which comprises a three-phase bridge arm unit, a common DC side unit and a zero sequence bridge arm unit; the three-phase bridge arm unit is connected with each phase power supply branch of a three-phase power grid, a common neutral end of the common DC side unit and an input end of the zero sequence bridge arm unit, and an output end of the zero sequence bridge arm unit is grounded; the zero sequence bridge arm unit is used for generating a first current for offsetting a fault zero sequence component based on a power grid voltage, a power grid current and a common neutral end voltage of the three-phase power grid; the three-phase bridge arm unit is used for determining a three-phase reactive compensation current based on the common neutral end voltage and the first current input by the zero sequence bridge arm unit, and sending the three-phase reactive compensation current to a corresponding phase distribution line of the three-phase power grid; and the common DC side unit is used for providing common DC voltage support for the three-phase bridge arm unit and the zero sequence bridge arm unit. The zero sequence disturbance of the distribution network can be inhibited, and the voltage deviation and power fluctuation problems caused by the power grid transient disturbance can be weakened.

The present application relates to the field of gas turbine, in particular to a gas turbine combustion chamber gas-liquid dual fuel mixed combustion test system and working method thereof, comprising: a combustion cavity unit, a combustion state monitoring unit, a liquid fuel supply unit, a gas fuel supply unit, a main air supply unit and a central control unit; the combustion cavity unit comprises a test shell, a flame tube, a dual fuel nozzle and an igniter, the flame tube is installed in the inner cavity of the test shell and is fixed by the head and tail support. The present application sets up a test system by setting a dual fuel nozzle and a flame tube in a unique test shell, and configuring an igniter, a pressure pulsation sensor and other structures, combined with a central control computer to ensure that the combustion chamber outlet temperature remains unchanged, through precise control of the gas fuel and liquid fuel flow, the dual fuel mixed combustion characteristic curve under each working condition is automatically obtained.

This invention discloses a method for adjusting the operating mode of a floating multi-energy complementary power generation platform system. The method includes setting the wave energy generation unit to MEC mode; setting the photovoltaic power generation unit to MPPT mode; setting the grid-side inverter unit to current source mode (VOC control mode); setting the energy storage unit converter to power generation fluctuation smoothing mode, and switching the charging and discharging states of the energy storage unit through constant power control; setting the wave energy generation unit to MEC mode or shutdown operation mode; setting the photovoltaic power generation unit to MPPT mode or constant voltage control mode; setting the grid-side inverter unit to VF control mode; and setting the energy storage unit converter to DC bus voltage stabilization control mode. This invention reduces transmission losses while minimizing the power impact on the main grid during the grid-connected operation of the island microgrid based on the power generation platform, thus improving the system's operational reliability.

The invention discloses a wind hydrogen storage collaborative digital real-time management and control platform and method, and relates to the technical field of power grids, and the platform comprises a time calculation module which calculates the structure propagation time based on the effective length of a blind branch pipe; the segmentation module is used for obtaining a plurality of continuous time periods based on the structure propagation time; an amplification module that calculates a first statistical value based on the continuous time period, and calculates a structure amplification factor based on the first statistical value; the coupling module is used for defining a tank opening pipe section and calculating the three-way parallel coupling amount according to the tank opening pressure time sequence and the structure amplification factor of the tank opening pipe section; and the correction module obtains a corrected hydrogen production power adjustment amount according to the three-way parallel coupling amount. According to the invention, invalid charging and discharging times of the energy storage system can be effectively reduced, and grid-connected power fluctuation amplitude is reduced.

The application discloses a source-load scheduling method considering electric smelting magnesium load regulation and wind power distribution, introduces electric smelting magnesium high-load energy load with fast regulation characteristics on the load side, participates in power grid optimal scheduling together with thermal power plants, takes the maximum system wind power consumption and the minimum sum of average variances of power fluctuations at all wind power plant busbars as objective functions, considers relevant constraints, and solves by using a genetic algorithm; the system wind power curtailment, wind power fluctuation and other aspects under different cases are compared and analyzed, and the effectiveness of the low-carbon optimal scheduling model considering electric smelting magnesium load regulation and wind power distribution is proved, the system new energy consumption can be improved, and the new energy power fluctuation can be reduced. Finally, the actual load curve of each wind turbine after smoothing is obtained. The method can reduce the wind power curtailment, realize the wind power consumption, and smooth the output curve of each wind power plant; the two objective functions echo each other, so that the calculation of each unit is more reasonable.

The invention discloses a doubly-fed flywheel energy storage-based network following-construction fusion control method, which comprises the following steps of: 1, acquiring electrical parameters of a stator and a rotor of a doubly-fed fan, performing coordinate transformation to obtain dq-axis components, and calculating real-time output power of the stator; 2, a virtual internal potential phase is generated through virtual synchronous control, a phase-locked loop obtains a power grid phase, modulation voltage reference values are output respectively, and a final modulation voltage reference value is obtained through weighted sum so as to realize dynamic fusion control of network following and network construction characteristics, and in the network following control, a modulation voltage is obtained through a rotating speed-active and reactive outer loop and a current inner loop, and the current inner loop is added to the rotating speed-active and reactive outer loop; in the network construction control, instantaneous power is calculated through electrical parameters, a reference phase and voltage are obtained through virtual synchronous control, and modulation voltage is output through a single voltage loop. According to the method, the characteristics of the network following current source and the network construction voltage source are fused, advantage complementation is achieved, the method has fast power adjustment and power grid supporting performance, the method is adaptive to a wide-short-circuit-ratio power grid scene, and therefore the weak power grid stability and the new energy consumption capacity can be effectively improved.

The present application relates to a distributed photovoltaic MPPT method, system, device and medium, and relates to the technical field of distributed photovoltaic power generation, which comprises the following steps: preprocessing photovoltaic array data, obtaining irradiance, temperature and MPP voltage dataset; determining the optimal ElmanNN hidden layer node number by K-fold cross-validation and RMSE evaluation, and dividing the dataset into a training set, a validation set and a test set; inputting the training set into global search of the firefly algorithm and local optimization of the ant colony optimization algorithm, defining the stable solution as the FA-EAS optimal parameters after convergence; updating the ElmanNN weight threshold based on the optimal parameters, deploying the training model to perform MPP voltage online prediction; inputting the difference between the predicted voltage and the reference voltage into a PID controller, calculating the control amount through the incremental PID, generating a PWM signal to control the duty cycle of the Boost converter, and realizing maximum power point tracking. The present application can improve the tracking speed, stability and success rate of MPPT.

The invention relates to an electrolytic cell array optimization control method and system based on model prediction, and the method comprises the following steps: S1, dividing an electrolytic cell array operation mode according to the operation characteristics of an electrolytic cell, and building an electrolytic cell state transition equation according to the operation characteristics of the electrolytic cell and the electrolytic cell array operation mode; s2, an optimal control problem is constructed, the optimal control problem comprises defining an objective function and system constraint conditions, and a mixed integer optimization model of alkaline electrolytic cell array power distribution is formed; and S3, constructing a model prediction optimization control strategy algorithm based on improved Monte Carlo tree search, and solving an optimal control problem based on the algorithm to obtain an optimal control strategy result of the electrolytic cell array. The control method provided by the invention can effectively improve the scheduling fineness of the electrolytic cell array and reduce the starting and stopping times and power fluctuation of the electrolytic cell, so that the service life of electrolytic cell equipment is prolonged, and the safety, reliability and economical efficiency of a hydrogen production system are improved.

The invention provides a flexible load scheduling method and system based on an energy management system, and relates to the technical field of electric power. According to the specific implementation scheme, on the basis of a photovoltaic generating capacity prediction curve and a non-adjustable load prediction curve of a power system in a first time period, the control temperature of a temperature control load and the operation time of a time-adjustable load in the power system are used as independent variables; taking the net power fluctuation average value of the power system in the first time period as a dependent variable to construct a first objective function; based on the control temperature constraint condition of the temperature control load and the constraint condition of the operation time of the adjustable time load, the minimum value of the first objective function is solved, and a target temperature curve of the temperature control load in the first time period and a target operation time curve of the adjustable time load in the first time period are obtained; and based on the target temperature curve and the target operation time curve, a temperature control load and an adjustable time load in the power system are respectively scheduled in the first time period.

The invention provides an adapter control method and device and control equipment, and is suitable for the technical field of data processing, and the method comprises the steps: obtaining the real-time power data and power fluctuation amplitude of an adapter; according to any data in the power data and the power supply fluctuation amplitude, identifying a current starting scene, and determining a target starting protection mechanism matched with the current starting scene; wherein the starting protection mechanisms matched with different starting scenes are not completely the same; and starting of the adapter and the electrical equipment is controlled based on the target starting protection mechanism. According to the embodiment of the invention, the adapter and the electrical equipment can be started based on an appropriate starting protection mechanism every time to reduce power supply fluctuation during starting, so that the stability of the electrical equipment in the starting process is improved.

The invention discloses a spray needle switching and evaluation method for a six-spray six-fold large impulse turbine, belongs to the technical field of impulse turbines, and provides a spray needle switching mode and a control strategy, a one-dimensional non-constant flow model is adopted in a water diversion system, and a six-spray six-fold impulse turbine calculation model is constructed. Comprising a spray needle switching mode module, a spray needle callback control module, a power correction module, a power opening conversion function module, a power feedback module and the like, the unit power fluctuation characteristic in the spray needle switching process can be accurately simulated, the power fluctuation in the switching process is effectively reduced, the adjusting quality of a water turbine is improved, and guidance can be provided for design and operation of a power station.

The application belongs to the technical field of intelligent control, and discloses a kind of operation control method and device, equipment of wind and light hydrogen storage comprehensive energy system, by controlling scheduling layer MPC to run with first control period, in each cycle, generate the coupling reference trajectory of future time domain SOC, SOCH and grid interaction power reference value, build optimization problem to obtain the optimal solution of energy storage power and electrolytic cell reference power;Control control layer MPC to run with shorter second control period, and receive coupling reference trajectory as hard tracking target in each cycle, and build optimization problem to generate energy storage and electrolytic cell control instruction sequence;So it can reduce grid tie line power fluctuation, effectively decouple long-term economy and short-term real-time control demand;At the same time, embedding the dynamic energy conversion constraint of electrolytic cell reference power and SOCH can ensure the physical realizability of reference trajectory, improve the success rate of optimization solution, and enhance the robustness of system operation.

A power distribution method based on a hybrid energy storage system, comprising the following steps: CEEMD decomposition of wind power generation data; intrinsic mode function energy entropy calculation; power distribution based on fuzzy control optimization method. The present application proposes to decompose the wind and light power fluctuation based on the CEEMD method, and to optimize the energy storage configuration combination of power distribution after completing the energy entropy distribution by using the fuzzy control method. The present application helps to ensure the accuracy of power distribution and further improves the efficiency of fluctuating power suppression decomposition. The protection point is to make the SOC fluctuation range of super capacitor and battery below 10%, and the power is always maintained at about 50% of the battery SOC, so that both kinds of energy storage devices can play the maximum role, and the overall efficiency and service life of the hybrid energy storage system are improved.

The application discloses a kind of multi-incremental power pressure equipment electric control system and power control method, electric control system includes at least one increaser and the power battery managed by battery management system, increaser and power battery are connected to DC distribution box, DC distribution box powers multiple motor inverters, multiple motor inverters correspond to control multiple motor operation;It also includes VCU controller and UDCU upper controller, UDCU upper controller is used to predict working condition and generate equipment operating parameter, VCU controller is respectively connected with UDCU upper controller, increaser, battery management system, DC distribution box, motor inverter communication, according to the operating data of UDCU upper controller generated to the optimization distribution of increaser and power battery, and through VCU controller control back-end equipment operation.The application solves the problems, such as single power supply mode, low efficiency of power system and imperfect control strategy in the prior art, and realizes efficient, stable and fast transition of pressure equipment operation in the environment without network power.

The invention provides an anti-fluctuation power electronic equipment low-voltage ride-through control method and system, and the method comprises the steps: outputting a positive-sequence dq-axis current instruction value and a negative-sequence dq-axis current instruction value of power electronic equipment through an outer-ring controller of the power electronic equipment; performing amplitude limiting on the positive-sequence dq-axis current instruction value through an inner ring controller of the power electronic equipment to obtain a positive-sequence voltage three-phase instruction value; obtaining a negative sequence voltage three-phase instruction value through an inner ring controller according to the negative sequence dq axis current reference value; according to the positive sequence voltage three-phase instruction value and the negative sequence voltage three-phase instruction value, low-voltage ride-through control is carried out on the power electronic equipment; in the low voltage ride through process of the power electronic equipment, the current control of the power electronic equipment is realized by limiting the amplitude of the positive sequence dq axis current instruction value and correcting the positive sequence current instruction value of the power electronic equipment, so that the power fluctuation is reduced before the equipment generates the power fluctuation, and the voltage fluctuation is controlled.

The invention discloses a satellite-borne optical amplifier power closed-loop control system based on an FPGA, and belongs to the technical field of satellite-borne optical communication, and the satellite-borne optical amplifier power closed-loop control system adopts an anti-radiation FLASH type FPGA as a core controller, and a configuration storage unit is based on a floating gate transistor physical structure so as to eliminate the configuration upset risk caused by single-particle bombardment; the FPGA internal control logic adopts a pure hardware pipeline architecture, comprises combinational logic and sequential logic, and has no software instruction scheduling link; the feed-forward unit realizes quick response through a pre-stored'input optical power-pumping current 'mapping table, and the feedback unit realizes fine steady-state correction by adopting parallel hardware PID (Proportion Integration Differentiation); and the feed-forward quantity and the feedback quantity are subjected to weighted fusion through a hardware multiplier-adder to form a closed-loop control system. By adopting a closed-loop control architecture combining feedforward and feedback, the feedforward unit can output a pre-regulating variable within 50ns at the moment of sudden change of input optical power, initial overshoot of pump relaxation oscillation is quickly suppressed, and the response time of the system is greatly shortened.

This invention discloses a start-up control method and storage medium for solid-state hydrogen storage fuel cells, belonging to the field of fuel cell technology. The control method includes acquiring the stack current and calculating the required hydrogen release rate according to a power-limited collaborative control method; allocating heating power according to the temperature distribution differences in different regions of the solid-state hydrogen storage module to perform differentiated heating of the solid-state hydrogen storage module; adjusting the heating power of the solid-state hydrogen storage module according to a PID control method to adjust the hydrogen release rate of the solid-state hydrogen storage module, including: if the actual hydrogen release rate is less than the required hydrogen release rate, using the actual hydrogen release rate; if it is not less than the required hydrogen release rate, using the required hydrogen release rate; wherein, the heating power is corrected according to the temperature response characteristics of the hydrogen storage material to obtain the actual applied heating power; this invention optimizes the rapid heating process of the solid-state hydrogen storage module in the low-temperature start-up stage through a layered heating strategy, reduces the low-temperature heating time of the solid-state hydrogen storage fuel cell, and effectively improves the output performance of the fuel cell.

The invention discloses a wind turbine generator high voltage ride through control method, system and device and a medium, and relates to the technical field of wind power, and the method comprises the steps: collecting a three-phase voltage signal of a power grid in real time; generating a dynamic state factor based on the preprocessed three-phase voltage signal; generating a trend factor according to the change rate of the dynamic state factor in combination with a time sequence trend index; according to the trend factor, reactive current output is dynamically adjusted through a grid-side converter, and a reactive power instruction is generated; generating a theoretical active power value according to the trend factor and the reactive power instruction in combination with fan mechanical characteristic parameters; and dynamically adjusting the active power output of the wind turbine generator. According to the wind turbine generator high voltage ride through control method provided by the invention, the problems of response lag, insufficient adjustment precision and overlarge power fluctuation are solved, and the overshoot phenomenon in the power adjustment process is avoided; and through dynamic smooth adjustment, the power fluctuation is reduced, and the operation stability and the adjustment accuracy of the wind turbine generator during high voltage ride through are ensured.