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1719 results about "Power compensation" patented technology

Rapid tracking and adaptive compensation method for power fluctuation of pulse load of ship

A tracking and adaptive compensation method for power fluctuation of a pulse load of a ship is provided. The method includes: based on a microgrid topology model of the ship, a pulse load model of the pulse load, and an interharmonic power and pulse parameter relationship model, performing power fluctuation tracking, frequency selection and a power spectrum analysis to obtain filtering parameters of a low-pass filter and filtering parameters of a band-pass filter; performing waveform adaptation to eliminate a phase delay caused by the low-pass filter and the band-pass filter, and obtaining a control command for a power compensation strategy; and generating, by a power loop, a pulse width modulation (PWM) signal to control a switching tube in a bidirectional direct current (DC) / DC converter of each of an energy storage battery pack and a supercapacitor of a hybrid energy storage system.
Owner:SHANGHAI JIAOTONG UNIV

Flywheel energy storage system control method based on data center photovoltaic power supply

The invention discloses a flywheel energy storage system control method based on data center photovoltaic power supply, and belongs to the technical field of power system and new energy grid-connected control, and the method comprises the steps: obtaining the output prediction data of photovoltaic power generation, the real-time load power, the voltage fluctuation parameter of a commercial power grid, and the real-time rotating speed state of flywheel energy storage; generating a power gap predicted value by taking the real-time rotating speed state of flywheel energy storage as a dynamic constraint variable; generating a flywheel commercial power cooperative control strategy according to the commercial power voltage fluctuation parameter; the temperature change rate of the flywheel motor is detected in real time, and a control instruction is generated; and synchronously sending the control instruction to the photovoltaic inverter and the flywheel motor, adjusting the parameters of the photovoltaic inverter and the flywheel rotating speed response data, and dynamically updating the control parameter set. According to the invention, a dual adjustment mechanism of flywheel rotating speed dynamic constraint and voltage fluctuation ratio weight distribution is adopted, and a temperature gradient harmonic collaborative suppression strategy is combined, so that millisecond-level power compensation response can be realized, the power grid dependence degree is reduced, and the service life of an energy storage system is prolonged.
Owner:SHENYANG MICRO CONTROL ACTIVE MAGNETIC LEVITATION TECH IND RES INST CO LTD

Photovoltaic off-grid inverter control method and system

The invention relates to the technical field of power electronics, in particular to a photovoltaic off-grid inverter control method and system, and the method comprises the following steps: applying a test signal to identify an output interaction characteristic parameter, predicting the power generation power through combining with weather and attenuation, calculating the power fluctuation, and adjusting a current control parameter set. And calculating voltage and reactive power compensation parameters to generate an inverter control instruction, and combining a temperature load prediction trend to adjust a power allowable value to obtain a predictive power calibration coefficient. According to the invention, by analyzing the output interaction characteristics, enhancing the perception capability of the inverter to the actual operation environment, combining with the prediction of the photovoltaic power generation amount, realizing the prediction and influence evaluation of the power fluctuation, improving the adaptive adjustment capability of the current control parameters, improving the output voltage and reactive power control precision by utilizing the interaction characteristics, and optimizing the electric energy quality; and through thermal management of multi-point temperature and load prediction, the operation safety is improved, the service life of equipment is prolonged, and the operation performance of the photovoltaic off-grid system in a complex environment is improved.
Owner:SHENZHEN WENKE GREEN ENGINEERING CO LTD

Control method for low-voltage intelligent reactive compensation system of submerged arc furnace

The invention relates to the technical field of power electronics, in particular to a control method for a low-voltage intelligent reactive compensation system of a submerged arc furnace. Comprising the following steps: acquiring three-phase voltage, current, power factor, harmonic content and temperature parameters of the low-voltage side of the submerged arc furnace through a sensor network; the load fluctuation of the submerged arc furnace in the future 1-5 minutes is predicted based on a deep learning algorithm, and a compensation demand pre-judgment value is generated; according to a load prediction result and a real-time working condition, performing dynamic switching from three modes of fixed compensation, grouped switching and continuous adjustment; harmonic component dynamic tracking compensation is carried out by combining an active power filter (APF) and a static var generator (SVG); the system overvoltage, overcurrent and temperature parameters are monitored in real time, and a grading protection mechanism is triggered and fed back to the compensation strategy adjusting module. The invention provides a control method for a low-voltage intelligent reactive compensation system of a submerged arc furnace so as to improve the response speed of the system, prolong the service life of equipment and guarantee the electric energy quality of a power grid.
Owner:XINJIANG WEST HESHENG SILICON MATERIAL CO LTD

Reactive compensation optimization method and system based on AI

The invention relates to the technical field of power grid operation and maintenance, and discloses an AI-based reactive compensation optimization method and system, and the method comprises the following steps: integrating the four-dimensional characteristics of traffic flow, power grid load, user preference and equipment health degree, constructing a space-time correlation graph model, achieving the adaptive evolution of a topological structure through dynamic graph convolution and an attention mechanism, and obtaining a reactive compensation optimization model. The method comprises the following steps: fusing spatial-temporal features of a graph neural network with a BiGRU time sequence for modeling, injecting an equipment health degree attenuation factor, generating a charging demand prediction result with uncertainty quantification, expanding an intelligent agent state space, improving a reward function, and embedding equipment health degree constraints in a strategy network and near-end optimization. By sensing the degradation state of the equipment in real time and intelligently adjusting the reactive compensation strategy, the service life of the old equipment is prolonged while the voltage stability is guaranteed, the deviation accumulation effect is effectively inhibited through feedforward-feedback composite control and dynamic rescheduling, and accurate matching of a scheduling instruction and actual output is ensured.
Owner:JINZHOU ZHONGRUI ELECTRICAL EQUIP CO LTD

Hybrid inverter supporting reactive compensation and control method thereof

The invention relates to the technical field of hybrid inverters, and discloses a hybrid inverter supporting reactive compensation and a control method thereof, and the hybrid inverter comprises a DC input unit, a three-phase full-bridge inversion unit, a grid-connected switching unit, a signal acquisition unit and a digital control unit. The direct current input unit comprises a photovoltaic interface, a battery interface and a direct current bus and is used for converging photovoltaic and energy storage electric energy; the three-phase full-bridge inversion unit is composed of a power device and an LCL filter and converts direct current into alternating current. The grid-connected switching unit comprises a static switch and an isolation transformer and is used for controlling power grid connection; the signal acquisition unit detects voltage and current signals; and the digital control unit judges a grid-connected mode or an off-grid mode according to the signal, calculates a reactive current reference value and generates a PWM (Pulse Width Modulation) control signal so as to realize reactive compensation control in the grid-connected mode and the off-grid mode. According to the invention, reactive power compensation capability is provided in both grid-connected and off-grid operation modes, and stable operation of the inverter in various working conditions is ensured.
Owner:SHENZHEN EENOVANCE ENERGY TECH CO LTD

Self-healing operation and maintenance method for state of power equipment

The invention relates to a power equipment state self-healing operation and maintenance method, and belongs to the field of power equipment operation and maintenance, and the method comprises the steps: obtaining the real-time operation state data of a power supply in a current multi-source power supply system, collecting the data through a preset sampling frequency, and constructing a power supply state matrix; a conversion time constraint condition is set in advance, a zero-delay switching decision tree is constructed and a power supply switching decision is output in combination with a main power supply fault risk assessment result, and if the main power supply fault risk assessment result is abnormal, the standby power supplies are switched according to the determined switching priorities of the standby power supplies and the power supply switching decision; after the switching is completed, monitoring the power supply continuity index of the power equipment in real time, and if the power supply fluctuation time or the phase jump amplitude exceeds a preset allowable value, smoothing the power supply fluctuation by adopting the rapid power compensation function of the energy storage device; the stability and reliability of the multi-source power supply system are improved, and intelligent power supply switching and self-healing disaster recovery are realized.
Owner:STATE GRID SHANDONG ELECTRIC POWER CO QINGDAO HUANGDAO DISTRICT POWER SUPPLY CO

Composite wing unmanned aerial vehicle rotor wing fault positioning and power reconstruction system and method

The invention discloses a rotor fault positioning and power reconstruction system and method for a composite wing unmanned aerial vehicle, and belongs to the technical field of unmanned aerial vehicle fault-tolerant control. The system comprises a data acquisition module, a fault verification module and a power redistribution module, and is characterized in that firstly, a rotor fault-attitude change direction symbol mapping table is established according to a rotor physical layout and attitude dynamics relationship, and a fault type is identified; after symbol matching is met, a dynamic threshold energy verification function is constructed for judgment, and whether the rotor has a real fault or not is judged through a fault dual verification model of symbol matching and energy verification; a control distribution matrix is dynamically reconstructed according to the verified fault rotor position, power compensation is provided by coordinating normal rotors, and stable control over the flight attitude is achieved. The invention provides an effective method for reducing the false alarm rate and the fault response time of the sensor, so that a control system can quickly respond and recover the flight attitude when the rotor wing suddenly fails, the attitude control stability is ensured, and the flight safety is remarkably improved.
Owner:AVIC JINCHENG UNMANNED SYST CO LTD

SVG static var generator control method and system

The invention relates to the technical field of generator control, and particularly discloses an SVG static var generator control method and system, and the method comprises the steps: constructing a reactive-voltage sensitivity matrix containing a node sensitivity weight based on the real-time measurement data of a power grid, and obtaining a node sensitivity matrix; a dynamic sorting strategy of device priority grading is generated, a distributed compensation priority queue of all devices is obtained, and the devices comprise an SVG cluster and a photovoltaic inverter cluster; executing reactive power distribution under a capacity constraint condition based on the distributed compensation priority queue, and generating a target reactive power compensation amount with the capacity constraint condition; generating a hierarchical coordination control instruction of the SVG and the inverter according to the target reactive compensation amount, and obtaining a hierarchical control instruction set; executing the distributed cooperative compensation driven by the hierarchical control instruction set, and completing the dynamic regulation of the power grid voltage; the reactive power regulation capability of different devices in a power grid can be fully utilized, the accuracy and response speed of reactive power distribution are improved, and resource waste and excessive compensation are avoided.
Owner:JIANGSU YINGNENG INFORMATION TECHNOLOGY CO LTD

Charging pile energy management method, system, equipment and medium

The invention relates to a charging pile energy management method, system and device and a medium, and belongs to the technical field of charging pile energy management, and the energy management method comprises the steps: receiving a vehicle charging demand, calculating the charging urgency degree, obtaining the real-time state of a charging pile, calculating the power margin, and constructing a charging pile-vehicle adaptation matrix; and then, the system calculates a power distribution strategy and sends the strategy to the vehicle end to ensure reasonable matching of charging resources. The system calculates the safety limit value in real time and adjusts the actual distribution power to ensure the safe operation of the charging pile. And if the power of a certain charging pile is insufficient, calculating a to-be-migrated power amount and generating a load migration strategy, and adjusting the bus voltage by utilizing the energy storage equipment to carry out cross-pile power migration. After charging is started, the system monitors and executes feedback, dynamically optimizes a power distribution strategy, and identifies a low-efficiency charging pile for power compensation. The charging pile resource allocation can be optimized, the overall charging efficiency is improved, and the user experience is improved.
Owner:YIBIN TENGYI NEW ENERGY CO LTD

Method and terminal for configuring reactive power capacity of a power grid to which offshore wind power is connected on a large scale

A method for configuring reactive power capacity of a power grid to which offshore wind power is connected on a large scale includes the following steps. Static voltage stability index of substations in a regional power grid to which the offshore wind power is connected on the large scale and at multiple points and relative dynamic voltage drop area index for an N-2 fault are calculated. Thus, weak nodes in voltage stability are located, thereby implementing a prediction of a risk to the voltage stability of the regional power grid. These nodes are used as candidate reactive power compensation configuration nodes. An objective function is established as the minimum total cost of reactive power compensation devices at the candidate reactive power compensation configuration nodes. A multi-type reactive power optimization configuration model including static voltage stability constraints, voltage stability constraints under faulty state, and other constraints is solved.
Owner:STATE GRID FUJIAN POWER ELECTRIC CO ECONOMIC RESEARCH INSTITUTE +1

Anti-interference accurate temperature control method and system for heating upper die

The invention relates to the technical field of temperature control of high-precision industrial heating equipment, in particular to an anti-interference precise temperature control method and system for heating an upper die, and the method comprises the steps: starting a multi-region heating array, heating the upper die to a target temperature according to a preset temperature rise curve, and building a uniform thermal field; before the high-pressure medium is introduced, heat load change caused by the high-pressure medium is predicted based on medium process parameters; in the medium introduction process, dynamic anti-interference compensation control is executed, a feedforward power compensation instruction based on a thermal load and a feedback power fine tuning instruction based on temperature deviation are generated respectively, and the feedforward power compensation instruction and the feedback power fine tuning instruction are weighted and fused into a composite power driving signal for adjusting a heating array; when the temperature fluctuation converges to a stable threshold value, the feedforward compensation weight is gradually reduced, smooth switching to steady-state control is achieved, transient thermal shock caused by a high-pressure medium is effectively restrained through feedforward and feedback cooperative compensation and dynamic weight adjustment, the temperature fluctuation is reduced, and the temperature control precision and stability are improved.
Owner:CHANGZHOU KERUIER TECH CO LTD

Power grid energy conservation and loss reduction system based on dynamic reactive compensation and reliability optimization method

The invention provides a power grid energy conservation and loss reduction system based on dynamic reactive compensation and a reliability optimization method, and belongs to the technical field of power grid energy conservation and loss reduction. Comprising a data acquisition module which is used for acquiring real-time electrical parameters of a power grid; the reactive power demand calculation module is in communication connection with the data acquisition module and is used for receiving the real-time electrical parameters of the power grid transmitted by the data acquisition module, and the reactive power demand calculation module is further used for calculating the real-time electrical parameters of the power grid based on an improved compensation demand prediction algorithm. And according to the real-time electrical parameters of the power grid, dynamically calculating a reactive compensation amount and a reactive compensation type, and generating a compensation instruction by combining the reactive compensation amount, the reactive compensation type and a preset threshold value. The beneficial effects are that the compensation instruction is generated according to the reactive compensation type and the preset threshold value, and the compensation execution module switches the compensation device according to the compensation instruction, thereby realizing reactive dynamic adjustment, and enabling the power grid to achieve the effects of energy saving and loss reduction.
Owner:STATE GRID HENAN ELECTRIC POWER CO NANZHAO COUNTY POWER SUPPLY CO

Integrated one-machine double-gun direct current charging pile

The invention, which belongs to the technical field of electrical variable adjustment, provides an integrated one-machine double-gun direct-current charging pile comprising a main control module, a double-path power conversion module, a communication interface module, a data acquisition module, a charging control module, a display interaction module, a safety monitoring module, an energy storage module, a metering module and a power management module. The main control module is internally provided with a control chip, a system control module in the control chip firstly obtains charging state data through a data acquisition module, performs eigenvalue decomposition on a charging state matrix to extract a main eigenvector, and constructs a power feature space to calculate a power distribution coefficient. Constructing a temperature characteristic matrix based on the temperature data, and calculating a power compensation coefficient in combination with the energy storage capacity; multi-parameter collaborative optimization is carried out through the charging optimization equation set, accurate power balance control is achieved, and the technical problem that in the prior art, a double-gun direct current charging pile is difficult to achieve accurate power balance distribution under the dynamic load condition is solved.
Owner:QINGDAO HIGH TECH COMM

Non-difference control and PCC point voltage drop optimization system and method for network-forming inverter

The invention provides a netlike inverter indifference control and PCC point voltage drop optimization system and method, a reactive power error feedback module generates a reactive power compensation amount according to received reactive power reference information and collected reactive power information, and combines proportional integral control to eliminate a steady-state error so as to realize static indifference control of reactive power; the PCC point voltage drop feedforward compensation module dynamically adjusts the output voltage amplitude of the inverter according to the deviation between the theoretical reference voltage and the actual voltage of the PCC point, and directly counteracts the voltage drop caused by the line impedance; the dynamic impedance compensation module dynamically adjusts an integral coefficient of a PI controller according to an impedance parameter of a multi-machine parallel circuit, adapts to different impedance scenes, and ensures reactive power equalization and voltage balance under multi-machine parallel connection; through cooperation of closed-loop feedback and feed-forward compensation, static indifference control is realized, power grid disturbance is resisted, and system reliability is improved.
Owner:SHENZHEN EN-JOY TECH CO LTD

Improved energy storage converter network following control algorithm

The invention relates to the technical field of energy storage cooperative control, and discloses an improved energy storage converter grid following control algorithm, which comprises the following steps of: 1, extracting positive sequence and negative sequence components of three-phase voltage of a power grid through a double-sequence decoupling phase-locked loop, and acquiring a positive sequence axis component signal by adopting forward rotation coordinate transformation; and 2, when frequency locking is carried out based on the positive sequence axis component signal, extracting a voltage amplitude corresponding to the positive sequence axis component signal, and inputting the voltage amplitude to a feed-forward passivation module. An active power regulation technical scheme based on a frequency deviation threshold value is adopted, the technical effect of simulating the primary frequency modulation characteristic of a network-forming converter is achieved by detecting the power grid frequency deviation in real time and generating an active power compensation signal, and the defect that traditional network-following control lacks frequency active supporting capacity is overcome. And the converter can spontaneously increase the active power to stabilize the power grid frequency when the power grid frequency drops.
Owner:BEIJING HYPERSTRONG TECH CO LTD

Light commercial electric vehicle photovoltaic centralized charging control method and device and medium

The invention discloses a photovoltaic centralized charging control method and device for a light commercial electric vehicle and a medium, and belongs to the technical field of new energy charging. The method comprises the following steps: acquiring weather data, a vehicle battery charge state and task scheduling data; photovoltaic module parameters and environment data are processed through an LSTM neural network model, and a photovoltaic power generation power prediction curve is generated; constructing a multi-dimensional evaluation index system including task emergency degree, charging efficiency and power grid interaction factors, and generating a charging priority sequence in combination with an entropy weight TOPSIS algorithm; solving a real-time power distribution scheme based on a mixed integer programming algorithm, and dynamically adjusting the output power of the charging pile; monitoring the operation state of the system, and triggering a multi-stage power compensation mechanism when the photovoltaic power is insufficient or the electric quantity is low; and the battery state and the photovoltaic power are updated in real time, and a charging strategy is corrected through a rolling optimization algorithm. By means of the method, centralized charging control over the light commercial electric vehicle is achieved, and the technical effect of meeting the requirements of a motorcade is achieved.
Owner:潍柴新能源商用车有限公司

Phase modifier unit state monitoring and load control method and system for reactive power compensation of power grid

The invention discloses a phase modifier unit state monitoring and load control method and system for reactive power compensation of a power grid, belongs to the technical field of automatic control of power systems, and mainly solves the problem that service life loss is aggravated or a control target is single due to the fact that the health state of equipment is not fully considered when an existing phase modifier unit responds to reactive power requirements of the power grid. The method comprises the following steps of: calculating reactive vacancy and extracting vibration frequency band energy characteristics by acquiring voltage and frequency of a power grid as well as vibration, temperature and exciting current signals of a unit in real time, and constructing a health state index HSI in combination with self-adaptive wavelet basis selection; taking minimum equipment life loss and optimal power grid voltage stability as multiple objectives, dynamically generating a load control instruction by adopting a particle swarm algorithm, realizing weight adaptive adjustment based on HSI, and introducing an online life loss model as a constraint condition; finally, reactive power output is adjusted through an excitation system, and cooperative control of power grid stability and equipment life extension is achieved.
Owner:GUONENG LIAONING NEW ENERGY DEVELOPMENT CO LTD

Inspection robot autonomous charging dynamic control system

The invention discloses an autonomous charging dynamic control system for an inspection robot, and relates to the technical field of inspection robot management, and the system comprises a condition triggering module, a robot sensing module, a task decision module, a dynamic charging control module, a safety monitoring module and a log recording module. When a new inspection task packet is issued to a waiting or charging robot, a condition triggering module starts judgment, and a robot sensing module collects real-time electric quantity, task attributes and a charging pile state and encapsulates data; the task decision module calculates a task emergency degree and constructs a priority, and compares a charging basic priority to trigger a temporary or safe charging strategy; the dynamic charging control module dynamically adjusts charging parameters or calls safety parameters according to the dynamic charging parameters; the safety monitoring module monitors and intervenes in the charging process in real time, the log recording module records key operation and abnormity, and the system can dynamically adapt to task requirements, improves response efficiency and safety and is suitable for complex inspection scenes.
Owner:CRRC HANGZHOU DIGITAL TECH CO LTD

Control system and method based on charging pile V2G

The invention discloses a control system and method based on charging pile V2G, and relates to the technical field of charging pile V2G control, and the method comprises the following steps: firstly, a sensor device obtains the operation state parameters of a power grid in real time, accurately monitors the actual working condition of the power grid through the real-time collection of the operation parameter data, and provides basic data support for the subsequent analysis; based on deep learning and intelligent feedback control, the self-adaptive adjustment of the output voltage and the phase angle of the electric vehicle is realized, the reactive power is accurately compensated, the power grid voltage fluctuation is reduced, and the overall stability is improved. According to the scheme, the response speed of the EV inverter is increased, millisecond-level power grid adaptation is achieved, the V2G cooperative regulation and control capacity is enhanced, dependence on traditional reactive compensation equipment is reduced, and the new energy consumption efficiency is improved. By optimizing a power regulation and control mechanism, deep fusion of the EV as distributed energy storage is promoted, development of smart energy management is promoted, and the economic value and feasibility of the V2G in the power market are improved.
Owner:江西驴充充物联网科技有限公司

Multi-reactive compensation equipment active-reactive voltage cooperative control method considering energy storage

An active-reactive voltage cooperative control method for multiple reactive compensation devices considering energy storage comprises the steps that 1, simulation analysis is conducted on time sequence voltage fluctuation characteristics of a high-permeability photovoltaic grid-connected system, and dynamic influences of photovoltaic output fluctuation in different time periods on system node voltage are quantitatively evaluated; 2, solving a non-dominated solution set of the model by adopting a multi-target particle swarm optimization algorithm, realizing collaborative optimization and trade-off analysis of multi-dimensional performance indexes, and establishing a reactive power regulation model and an energy storage active power support model; and organically coupling the reactive power regulation model and the energy storage active power support model. By means of the method, high photovoltaic area voltage treatment can be effectively carried out in real time, and the method has high engineering application value and wide popularization prospects.
Owner:LIAONING DONGKE ELECTRIC POWER

Energy storage battery fault monitoring management method and system based on big data

The invention discloses an energy storage battery fault monitoring management method and system based on big data, and the method comprises the steps: calculating the change rate of a battery monomer between each window and an adjacent window, and recognizing an energy output inconsistent time period; identifying adjacent monomer power compensation behaviors in the energy output inconsistent time period; the load allocation rate, the deviation ratio and the heat consumption change amplitude of the compensated single battery in the compensation process are obtained; predicting the damage probability of the single battery in a plurality of periods in the future, and generating a fault probability curve; constructing a masked fault identification model, and identifying the fault state of the single battery; evaluating the fault level of the single battery, and constructing a fault level index table; and evaluating the validity of the fault early warning and maintenance strategy, and updating the fault early warning strategy and the health maintenance strategy. Through the technical method provided by the invention, accurate monitoring and intelligent management of the energy storage battery pack can be realized, the accuracy and timeliness of battery fault early warning are remarkably improved, and efficient and safe operation of an energy storage system is ensured.
Owner:GANZHOU KANGJIN ENERGY STORAGE TECHNOLOGY CO LTD

Voltage regulation system of reactive compensation equipment

The invention relates to the technical field of power systems, and discloses a voltage regulation system of reactive power compensation equipment, which is characterized in that harmonic interference is filtered and eliminated through a voltage reactive power sensing unit, and accurate power grid parameters are acquired; a load trend pre-judgment unit analyzes the historical load curve and the real-time change trend to generate a future pre-judgment signal; the dynamic compensation calculation unit combines the current power grid state with the prediction to calculate the optimal compensation capacity and generate a switching instruction, after the hybrid switching actuator receives the instruction, a thyristor is triggered firstly to realize inrush current-free conduction, a contactor is switched to maintain low power consumption after the current is stable, and meanwhile, the compensation state monitoring unit performs closed-loop adjustment on parameter deviation, so that the optimal compensation capacity is obtained. The multi-dimensional protection unit prevents overvoltage, overcurrent and overheating, the double-path power supply guarantees continuous operation when the main power supply is abnormal, the intelligent communication unit realizes data uploading and remote cooperation, quick response switching of reactive compensation equipment and guarantee of safety of a large-scale power grid are realized, and inrush current impact in the switching process is effectively inhibited.
Owner:INNER MONGOLIA ELECTRIC POWER (GRP) CO LTD WUHAI UHV POWER SUPPLY BRANCH

Electricity price and energy storage joint optimization method and system in electricity market environment

The invention relates to the technical field of power systems, provides an electricity price and energy storage joint optimization method and system in an electricity market environment, and aims to solve the problem that in the prior art, deep cooperation between electricity price and energy storage and a market mechanism is difficult to achieve. The method comprises the steps of obtaining actual and predicted load data of a power grid, and generating load prediction error distribution of a power market; according to load prediction error distribution, actual and predicted load data of the power grid and available rotation kinetic energy of the composite flywheel array, active power compensation is carried out on power shortage of the power grid; acquiring a real-time electricity price signal of each transaction period in the power grid, and generating a dynamic charging and discharging threshold value; generating a dynamic charging and discharging strategy of the energy storage equipment based on the dynamic charging and discharging threshold value; and based on the compensated power and a dynamic charging and discharging strategy, suppressing the electricity price fluctuation of the power vacancy generation node. According to the invention, suppression of instantaneous electricity price suddenly rising and market fluctuation closed-loop control are realized, and the problems of physical response delay and market strategy separation are synchronously solved.
Owner:BEIJING LUOHE TECH CO LTD

Multi-converter cooperative networking oscillation suppression method and device and storage medium

The invention discloses a multi-converter cooperative network construction oscillation suppression method and device and a storage medium, and belongs to the field of converter network oscillation suppression, and the method comprises the steps: carrying out the calculation based on a power-frequency droop control strategy of active compensation to obtain an active power output value of a converter, so as to achieve the smooth adjustment of the active power of the converter; the mechanical inertia and the damping coefficient of the multi-converter cooperative network construction are calculated through an inertia-damping equation considering the dynamic influence, so that the dynamic adjustment of the mechanical inertia and the damping coefficient is realized; and a reactive power output value of the converter is calculated based on the voltage-reactive droop control strategy of voltage compensation, so that reactive power compensation adjustment of the converter is realized. Through active compensation and consideration of dynamic influence and voltage compensation, multi-converter collaborative networking can quickly respond and keep the stability of a power grid under the conditions of frequency fluctuation, voltage imbalance and load disturbance, and power fluctuation and oscillation are reduced.
Owner:STATE GRID JIANGSU ELECTRIC POWER CO LTD RESEARCH INSTITUTE +1

Full-rotation type non-contact power transmission connector device and electric energy transmission method based thereupon

To provide a full-rotation type non-contact power transmission connector device.SOLUTION: A full-rotation type non-contact power transmission connector device includes a power supply module a full-bridge inverter module, a primary-side resonance compensation module, a full-rotation type ball connector module, a secondary-side resonance compensation module, and a full-bridge rectification module. The power supply module supplies a supply voltage required for the device. The full-rotation type ball connector module provides radial rotation between a ball head device and a ball seat device, and a receiving coil and a transmitting coil are located in the ball head device and ball seat device, respectively. The primary- and second-side resonance compensation modules include primary- and secondary-side LCC reactive power compensation modules and primary- and secondary-side coil capacitors.SELECTED DRAWING: Figure 6
Owner:ZHEJIANG UNIV +1

Cooperative method and device for harmonic suppression and reactive power compensation in power distribution network

The invention relates to a coordination method and device for harmonic suppression and reactive power compensation in a power distribution network. The method comprises the steps of obtaining power grid operation parameter information of a power distribution network; according to the power grid operation parameter information, the total current harmonic distortion rate, the power factor and each harmonic current information of the power distribution network are detected; detecting to-be-optimized parameters of the power distribution network according to the total current harmonic distortion rate, the power factor and the current information of each harmonic, the to-be-optimized parameters including at least one of each harmonic and reactive power; and according to the to-be-optimized parameters, suppressing each harmonic in the power distribution network and compensating reactive power in the power distribution network. The method can accurately perform cooperative control on harmonic suppression and reactive power compensation in the power distribution network.
Owner:ELECTRIC POWER RES INST CHINA SOUTHERN POWER GRID CO LTD

Engineering equipment operation intelligent monitoring and automatic adjusting system and method

The invention discloses an engineering equipment operation intelligent monitoring and automatic adjusting system and method, and the method comprises the steps: collecting the multi-dimensional operation data of equipment in real time, constructing a three-dimensional operation state evaluation model through an intelligent algorithm, accurately recognizing a stable operation region, and generating a dynamic control reference and a feedback adjustment loop; a control channel decoupling and selective reconstruction technology is adopted, a beneficial synergistic effect is reserved while harmful coupling is eliminated, potential risk points such as resonance are identified through spectral analysis, and a safe operation boundary for perfecting a is established; the analysis equipment responds to dead zone characteristics, the dead zone characteristics are converted into an energy-saving working zone through energy analysis, an optimized power distribution strategy is made, and a multi-stage emergency reserve system is established; a fault early warning mechanism based on vibration characteristics is established, and rapid detection and power compensation of an abnormal state are realized; through equipment response matrix construction and time delay compensation analysis, an accurate real-time control instruction is generated, and the operation efficiency, the stability and the energy-saving level of engineering equipment are comprehensively improved.
Owner:HUAKONG (LUOYANG) IND EQUIP CO LTD

JKW control method based on adaptive fuzzy control

The invention provides a JKW control method based on adaptive fuzzy control, which belongs to the technical field of reactive power compensation of a power system, and comprises the following steps of: interacting reactive power compensation states of JKW devices in adjacent regions based on an edge physical agent, constructing a regional reactive power topological graph in combination with local power grid topological data, generating a regional coordination instruction according to a supply-demand relationship, and establishing a regional coordination graph according to the regional coordination instruction; the method comprises the following steps: acquiring proportion deviation, power factor deviation and reactive power change gradient of a mutual inductor, constructing a standard fuzzy input vector in combination with a regional cooperation instruction, mapping the standard fuzzy input vector into a fuzzy linguistic variable through a dynamically updated fuzzy rule base, and reasoning and outputting an initial switching strategy; and comparing and analyzing the proportion deviation and the power factor deviation through a hardware comparator, determining a trigger condition and existence of a fault, and dynamically optimizing an initial switching strategy by combining a regional reactive topological graph to realize the control of the JKW. And the operation stability of the power grid is obviously improved.
Owner:SHENZHEN ZHENMEI ELECTRIC POWER TECHNOLOGY CO LTD

Reactive compensation adaptive control method based on power distribution network

The invention discloses a reactive compensation self-adaptive control method based on a power distribution network, which relates to the technical field of power systems, and comprises the following steps: collecting operation parameters of the power distribution network in real time and preprocessing the operation parameters, and identifying a load state and calculating a reactive demand by processing data; the state and parameter configuration of reactive compensation equipment are collected, an adjustment target table is obtained by calculating reactive deviation, and the equipment is dispatched and distributed; adjusting and controlling reactive power through a DDPG algorithm in combination with an OU noise mechanism and a curiosity mechanism based on the reactive demand, the reactive deviation and the equipment matching data, and issuing the adjusted reactive power to compensation equipment to execute reactive compensation; according to the method, a reinforcement learning framework fusing sensing, decision making, learning and control is constructed, multi-source state modeling, reward mechanism driving, refined Q value evaluation, strategy continuous optimization and physical constraint fusion are combined, and the reactive compensation adaptive control target in a complex power grid environment is achieved.
Owner:LIANYUNGANG ZHITUO ENERGY SAVING ELECTRIC CO LTD