48 results about "Voltage instability" patented technology

The invention relates to the technical field of micro-grids, and discloses a micro-grid real-time load balancing scheduling method and system based on deep reinforcement learning, and the system comprises a multi-source sensing module, an intelligent decision module, a safety protection module, an execution control module, a digital twin module and an energy efficiency evaluation module. When real-time load balancing scheduling of the micro-grid is carried out, a multi-time-scale scheduling strategy is generated in real time by dynamically coordinating economical efficiency, environmental protection and power supply reliability targets through a deep reinforcement learning agent, so that the problems of high operation cost, standard exceeding of carbon emission and voltage instability caused by a single optimization target in a traditional method are further solved, and the real-time load balancing scheduling of the micro-grid is realized. According to the method, the multi-dimensional collaborative optimization of the micro-grid in a complex operation environment is ensured, and meanwhile, a cloud global optimization module generates a long-cycle strategy, so that the problems of response delay and insufficient expandability of a centralized control architecture are further solved, and the real-time power balance capability in a high-permeability renewable energy source scene is improved.

The invention discloses a transient reactive power recovery control method, system and device for a new energy station and a storage medium, and the method comprises the steps: obtaining dynamic model parameters of a target new energy station, obtaining near-region power grid parameters of the target new energy station, building a near-region simulation model of the new energy station, carrying out the fault simulation of a near-region station of the target new energy station, and carrying out the fault simulation of the near-region station of the target new energy station. Identifying a target site causing transient voltage instability, and setting a fault occurring on the target site as a target fault; taking the maximum reactive power output and the reactive power recovery rate as optimization variables, constructing a multi-objective optimization function, and setting differentiation constraints; and carrying out iterative solution on the optimization function, evaluating system stability responses under different parameter combinations, and outputting an optimal minimum active output and an active recovery rate as a transient active recovery strategy of the new energy station. By optimizing the transient reactive power recovery control strategy of the new energy station after the power grid fault, the transient voltage stability of the near area of the new energy station is improved.

The invention discloses a transient stability enhancement control method and device for a network-forming converter, a terminal and a medium. According to the scheme, on the basis of matching control logic, a virtual power angle difference value is introduced to serve as an additional control variable, so that the converter can respond to direct-current voltage fluctuation and power angle deviation at the same time; therefore, when the phase jump or power fluctuation of the power grid occurs, the output angular frequency of the grid-forming converter can quickly respond to the phase jump by dynamically adjusting the virtual power angle reference value, so that the stability of the direct-current bus voltage is enhanced, and the phenomena of power angle oscillation and voltage instability in the transient process are inhibited.

The present application relates to the technical field of power system stability control, and is a steady-state voltage control method and system for reducing transient voltage instability risk of a new energy collection station, the method comprising: establishing a new energy collection station bus transient voltage model of a new energy sending end power grid after a DC bipolar blocking fault; setting a new energy collection station transient voltage instability limit of the new energy sending end power grid after the DC bipolar blocking fault; and setting a steady-state voltage control threshold for reducing the transient voltage instability risk of the new energy collection station bus based on the new energy collection station bus transient voltage model. The present application can achieve the purpose of reducing transient voltage instability risk by controlling the steady-state operating voltage of a high-proportion new energy sending end power grid without increasing dynamic reactive power compensation equipment. The present application is used to solve the problem of transient voltage instability caused by new energy off-grid of a new energy collection station of a DC sending end power grid after a DC fault due to excessively high transient voltage caused by excessively high steady-state operating voltage of the power grid.

The invention relates to the technical field of power distribution network control, in particular to an emergency generator set starting control method and system based on energy dispatching optimization, and the method comprises the steps: carrying out the voltage distribution calculation of a to-be-controlled power distribution network based on a historical operation period set, and obtaining a plurality of load node voltage amplitude sets, selecting a plurality of emergency risk nodes according to the plurality of load node voltage amplitude sets, calculating the number of emergency generators according to the current power distribution network vacancy power and the emergency rated generation power, and setting an emergency generator starting position set according to the number of emergency generators and the plurality of emergency risk nodes, according to the method, the accuracy and the response efficiency of emergency power generation of the power distribution network can be improved, and the voltage instability risk of the power distribution network is reduced.

The application discloses a power grid transient voltage instability expected fault tracing method and system, comprising: obtaining a two-dimensional feature vector corresponding to each fault scene in an expected fault set and a transient voltage stability conclusion label; determining a core instability set and a critical observation set of the fault scene based on the two-dimensional feature vector and the transient voltage stability conclusion label; clustering the core instability set and the critical observation set, and performing multi-dimensional feature imaging based on the clustering result to obtain a feature image corresponding to each instability mode cluster; and performing tracing analysis based on the feature image to obtain a tracing result. The application realizes intelligent focusing on key scenes and automatic induction of instability modes based on existing batch discrimination results and mechanism features through a customized screening, clustering and attribution process, and generates a structured analysis report which can directly support operation cognition.

The invention discloses a discharge management method and system based on UPS inversion and voltage regulation and control, and relates to the technical field of uninterruptible power supplies, and the system comprises a battery state sensing module, a load power monitoring module, a battery health assessment module, an inverter operation boundary calculation module, a voltage regulation and control execution module, a discharge termination control module, an energy recovery power supply module and the like. The core of the method is as follows: collecting battery and load data in real time, dynamically correcting a discharge termination voltage threshold by combining a battery aging model, and calculating a dynamic voltage lower limit constraint required by an inverter; in the discharging process, the stability of the voltage of the direct-current bus is ensured by reducing the power of the inverter or starting the dual-mode regulation and control of the booster circuit; and finally, battery electric energy is inverted into standard alternating current to be used by a load, and traditional resistor energy consumption is replaced. According to the invention, the problems of unstable voltage, energy waste, battery life loss, poor dynamic adaptability and the like in the traditional UPS discharge management are solved, and the high efficiency, safety and intelligence of the discharge process are realized.

The invention provides a bus residual voltage holding device based on distributed reactive compensation, and belongs to the technical field of bus residual voltage holding of an electric power system, and the device comprises a short circuit fault identification module which is used for monitoring the current of the electric power system, and when a current amplitude criterion Ig is greater than or equal to 2Ie and a current change rate criterion di / dt is greater than or equal to 25kA / s, determining that a short circuit fault occurs; the exciting current switching module comprises a normal exciting current loop and a residual voltage regulation exciting current loop, and is used for switching exciting current into residual voltage regulation exciting current when a short-circuit fault occurs through switching of a switch K; according to the method, optimization and improvement are carried out from two aspects of fault judgment and fault recovery, and the time period from abrupt drop to recovery of the bus voltage is shortened; the large-area power failure risk caused by voltage instability can be greatly reduced, the power supply reliability of key livelihood facilities of hospitals, traffic, communication and the like is improved, and the social public safety and stability are maintained.

The invention discloses a novel transient voltage instability discrimination method for a power system. The method comprises the steps of obtaining dynamic response data of a new energy unit in a fault ride-through process; according to the dynamic response data, extracting correlation characteristics of the active current and the terminal voltage; according to the correlation characteristics, constructing a transient voltage instability criterion; and carrying out transient voltage stability evaluation judgment according to a transient voltage instability criterion in combination with a Lyapunov index to obtain a judgment result. According to the method, the actually measured response data can be directly utilized to carry out transient voltage discrimination, so that the interference of complex factors such as a system operation mode and a network structure is avoided. The method has the advantages of being small in calculation amount, small in required measurement information amount, good in timeliness and the like, and the discrimination efficiency and practicability are improved.

This application relates to an optimized configuration method for improving the voltage stability of hollow power grids using SVG (Static Var Generator) architecture. The method includes: calculating the minimum singular value of the system Jacobian matrix based on power grid data; constructing a comprehensive evaluation model for weak nodes; calculating the node weakness index under various scenarios; constructing a static optimization configuration model; conducting analysis under a preset fault set; constructing a two-layer evaluation framework combining equipment-level and system-level analysis; quantifying the improvement of system transient voltage stability by candidate schemes; and comprehensively comparing and selecting the optimal configuration scheme that meets the requirements for transient stable voltage stability. This invention achieves accurate identification of weak nodes in the voltage stability of hollow power grids, significantly improving both the static and transient voltage stability margins of the system. It effectively solves the technical problems of voltage instability and poor transient recovery under high-proportion power electronics access, thereby improving the safety and anti-disturbance capability of power grid operation.

This invention relates to the field of power system stability control technology, and is a wind power converter control method and system for reducing the risk of transient voltage instability at wind power collection stations. The method includes: establishing a transient voltage model of the wind power collection station in the renewable energy sending-end grid after a DC bipolar blocking fault; establishing a reactive power control model of the wind power converter under the transient voltage control mode based on active power output; and setting transient voltage instability limits for the wind power collection station in the renewable energy sending-end grid after a DC bipolar blocking fault. This invention can fully leverage the rapid reactive power control advantages of the wind power converter when the transient voltage instability risk of the wind power collection station is caused by the UHVDC bipolar blocking in the renewable energy sending-end grid, thereby reducing the peak transient voltage of the wind power collection station, preventing the wind farm units connected to the wind power collection station from tripping and disconnecting from the grid due to high voltage ride-through failure, thus reducing the risk of transient voltage instability at the wind power collection station and improving the transient voltage stability of the system.

This invention discloses an LLC resonant converter with a wide voltage range input, belonging to the field of power electronics technology, including a DC voltage source V. in First bus voltage divider capacitor C in1 Second bus voltage divider capacitor C in2 First full-bridge switch Q1, second full-bridge switch Q2, third full-bridge switch Q3, fourth full-bridge switch Q4, first bidirectional switch Q5, second bidirectional switch Q6, first resonant inductor L r1 Second resonant inductor L r2 First resonant capacitor C r1 Second resonant capacitor C r2 First excitation inductor L m1 Second excitation inductor L m2 Transformer TR1, Transformer TR2, First rectifier diode D7, Second rectifier diode D8, Third rectifier diode D9, Fourth rectifier diode D 10 Output filter capacitor C o And load R. This invention can effectively eliminate the situation of instantaneous input voltage instability without increasing the complexity of the main control circuit, and ensure the normal operation of downstream electrical equipment.

This invention discloses a distribution network voltage control method based on safety constraints and online hyperparameter optimization. The invention constructs a distribution network voltage state transition model under no-communication conditions; derives a stability criterion based on Banach's fixed-point theorem and solves for the stability safety constraints of the action gain of each controlled node; configures an independent reinforcement learning control agent for each controlled node and applies stability safety constraints and equipment capacity constraints; trains the agent using a group relative policy optimization algorithm, updating the policy network parameters based on the relative advantage value of the trajectory within the group; employs a hyperparameter optimization method based on a multi-armed slot machine to optimize the reinforcement learning training hyperparameters online; and achieves cross-scenario migration of the reinforcement learning control agent through parameter remapping and incremental training when the distribution network scenario changes. This invention can realize distribution network voltage control, reduce the risk of voltage instability, reduce the computational overhead of hyperparameter optimization, and achieve rapid cross-scenario migration and adaptation.

The embodiment of the application provides a flexible direct current power transmission system voltage instability suppression method and device based on a direct current voltage divider, which comprises the following steps: collecting original voltage after the direct current voltage divider and before the introduction of a control link in the flexible direct current power transmission system; performing parameter estimation according to the original voltage to generate a voltage division ratio parameter; performing voltage correction modeling according to the voltage division ratio parameter to generate a voltage correction module; and performing voltage correction on the original voltage through the voltage correction module to generate a corrected control voltage. Since the original voltage is input into the voltage correction module for parameter adjustment, when the original voltage passes through the voltage correction module, the dynamic correction relationship between the voltage division ratios is achieved, so that the measurement value of the voltage is more accurate, and the problem caused by the abnormal increase of the direct current voltage is avoided. In this way, the linear increase of the direct current side voltage caused by the damage of the voltage divider can be effectively reduced, and the safety and stability of the flexible direct current power transmission system can be improved.

The application discloses a kind of new energy power grid transient voltage instability critical state determination method and system, comprising: obtaining the voltage time series data of bus after new energy power grid fault;The voltage time series data is processed with discrete wavelet transform, to obtain multiple different frequency band wavelet coefficients;Based on the wavelet coefficient, high-frequency detail energy and high-low frequency energy ratio are calculated;The high-frequency detail energy and high-low frequency energy ratio are fused to determine transient voltage stability index;When the transient voltage stability index is greater than or equal to preset index threshold, it is determined that power grid is in transient voltage instability critical state.The present application only relies on external measurement, and does not require internal parameters that are difficult to obtain, is physically clear, and the result is reliable, providing a new and effective solution for online safety and stability analysis of new energy power grid.

The invention discloses a high-proportion new energy power system transient instability dominant mode identification method and system, and the method comprises the steps: obtaining a power grid dynamic model and an anticipated fault set, and carrying out the time domain transient simulation to generate a power angle and bus voltage curve of a generator; identifying transient power angle instability characteristics or transient voltage instability characteristics and occurrence time in the curve; and identifying the dominant mode of the transient instability according to the time sequence characteristics between the power angle instability moment and the voltage instability moment in combination with a preset causal discrimination logic. According to the method, the identification of transient instability does not simply depend on the size of some static indexes any more, a discrimination method of a transient stability dominant mode is constructed, identification based on time logic is adopted, a source causing system instability can be accurately found out, and the problem of fuzzy identification in a multi-mode coupling scene in the prior art is solved.

The invention discloses a regional power grid aliasing type voltage instability evaluation method, and belongs to the field of regional power grids, and the method comprises the steps: firstly, carrying out the data collection, collecting the node voltage, line power, generator output, load power and power grid topological structure parameters in a regional power grid, carrying out the data preprocessing, and carrying out the data processing; the system is used for preprocessing the collected data information, extracting four types of core features from the preprocessed data, carrying out aliasing factor quantitative calculation, constructing an improved coupling coordination degree model, carrying out layered instability risk assessment, establishing an instability risk assessment matrix, and carrying out risk assessment. And finally, outputting an evaluation result and carrying out model verification. The method can solve the limitation of single-factor evaluation of a traditional method, the total consumed time from data acquisition to result output is short, and the requirement of regional power grid real-time scheduling for the evaluation speed is met.

The invention relates to the technical field of circuit protection, in particular to a short-circuit protection type electric power electrical switch cabinet which comprises an electrical switch cabinet body, an installation fixing plate is fixedly connected to the bottom end of the inner wall of the electrical switch cabinet body, an induction triggering mechanism is fixedly connected to the upper end of the installation fixing plate, and two power-on sockets are fixedly connected to the outer wall of the installation fixing plate. When a serious short circuit occurs, a high-intensity magnetic field caused by sudden increase of current is utilized to quickly cooperate with the moving block to quickly act, and the electrified plugs are instantaneously driven to be separated from the sockets through a mechanical transmission mechanism, so that quick power off is realized, and arc burning and equipment damage are effectively avoided; and aiming at the slight abnormal condition that the voltage is unstable for a long time, the liquid water slowly flows in the shrinkage corrugated sleeve to form a delay trigger mechanism, so that reliable power failure can still be ensured in a non-emergency and continuous abnormal state, misoperation caused by instantaneous fluctuation is prevented, and accumulated expansion of hidden faults is avoided.

A digital isolator module having additional delay path is provided, comprising a transmitter circuit receiving a data input signal and generating a first and second transmitter output signal. The second transmitter output signal is a delay signal of the first transmitter output signal. An isolation barrier is then configured, accordingly developing a first and second isolated output signal. And a receiver circuit accordingly generates a data output signal in response to the first and second isolated output signals. By employing a delay circuit in the disclosed transmitter circuit for delaying the first transmitter output signal and generating the second transmitter output signal, receiving signals at the receiver input terminal can be enhanced, robustness of data transmission is greatly improved and common mode voltage instability is suppressed. A pulse carrier modulation technique is further developed in the disclosed digital isolator module for reducing power consumption, electromagnetic interferences and jitter disturbance.

This invention discloses a method and system for risk assessment of distribution networks. The method includes: defining extreme high temperatures; constructing an assessment index system; using the indicators in the assessment index system to construct a model of the coupling relationship between extreme high temperatures and the temperature and load of the distribution network, a load surge risk assessment model, an equipment overload and failure probability assessment model, and a voltage instability assessment model, thereby obtaining the predicted load, overload probability, equipment failure probability, and voltage stability margin of the distribution network, respectively; and constructing a risk assessment model to assess the risk of the distribution network under extreme high temperatures. This invention, through the combination of accurate temperature and load coupling relationship modeling and the construction of a multi-dimensional risk assessment index system, solves the problems in existing technologies such as inaccurate load growth prediction under extreme high-temperature weather, inability to effectively assess the failure risk of distribution network equipment in high-temperature environments, and difficulty in comprehensively measuring voltage stability problems caused by extreme high temperatures.

The invention provides an active power distribution network new energy bearing capacity model prediction control method based on an FMSS, and belongs to the technical field of power operation control, and the method comprises the following steps: S1, constructing an active power distribution network architecture containing the FMSS; s2, establishing a voltage-line loss prediction model; s3, constructing an MPC rolling optimization model; and S4, implementing rolling optimization and dynamic adjustment. According to the active power distribution network new energy bearing capacity model prediction control method based on the FMSS, the problems of power distribution network voltage instability and line loss rising caused by distributed new energy output randomness and load fluctuation are solved; by dynamically adjusting the transmission power of the FMSS, the loss of the power distribution network is reduced, the voltage drop is reduced, and the voltage fluctuation is stabilized, so that the bearing capacity of new energy is improved.

The application discloses a kind of power grid multi power electronic equipment networking stability online monitoring method, control terminal and system, including according to the voltage and current sampling value of measuring point, get net side transient voltage and valve side transient voltage by transient voltage instability model, and analyze and judge whether instability exists in net side and valve side;The system operation stability of the patent can be monitored online after each power electronic equipment networking of power grid, mainly including transient voltage stability and power electronic dynamic control stability, and instability risk can be analyzed, diagnosed and disposed in emergency according to the four-quadrant power operation condition of power electronic equipment and network frame measuring point data, voltage transient fluctuation caused by multiple parallel machines of power grid, power electronic control instability and other problems are solved.

The invention provides a network construction type SVG locating and sizing method, and belongs to the technical field of power grid reactive compensation, and the method comprises the steps: combing a power grid serious fault set: combing the power grid serious fault set through analyzing fault records causing voltage instability, and determining a voltage weak region; a reactive power is injected, a dynamic sensitivity index is calculated, and the number of direct current commutation failures is recorded; configuring a network construction type SVG by taking the minimum number of commutation failures and the highest dynamic sensitivity as a priority criterion, and iteratively screening a preset number of candidate sites; candidate site optimization sorting: obtaining transient voltage curve data, calculating a transient voltage drop depth index, sorting the candidate sites according to the transient voltage drop depth index, and selecting an optimal site; determining a final installation site through site feasibility recheck; and determining the basic capacity according to the access voltage grade of the final installation site. The method has the advantages that a multi-dimensional site selection evaluation system is established; the weak voltage region is accurately positioned, and the pertinence of site selection decision is improved.

The utility model provides a kind of DC switching power supply and electric sliding door controller of electric sliding door, including main control circuit, motor drive circuit and switching power supply circuit, switching power supply circuit includes rectifier filter module and high frequency conversion module, width modulation square wave rectifier filter module and sampling comparison modulation module, switching power supply further includes voltage stabilizing module, voltage stabilizing module includes first stabilizer and second stabilizer, the input end of first stabilizer is connected with the output side of width modulation square wave rectifier filter module, the output end of first stabilizer is connected with the input end of second stabilizer, the output end of second stabilizer is connected with the power input end of main control circuit, the output end of first stabilizer is also connected with the power input end of motor drive circuit.Construction is built with 'high frequency conversion+multistage voltage stabilizing' framework, replaces traditional direct power supply, and voltage is adapted for motor, main control respectively, voltage instability problem is solved, and equipment reliability is improved.

The present application relates to new energy distribution network control technology, aiming at providing a kind of weakly connected grid scene energy storage adaptive follow / construct network online switching control method.It includes: in follow network and construct network mode, grid-connected inverter respectively uses PQ control strategy and VSG control strategy;When preparing to switch mode, the modulation wave reference value of two kinds of control strategies is used as the control fusion point in switching process, and the driving signal is further generated by weighted fusion processing to realize dynamic fusion, to control grid-connected inverter to realize adaptive follow / construct network online switching in non-stop state.The present application does not need complex cooperative control logic, and does not need to stop during switching, which ensures the continuous operation of energy storage system under different working conditions;When detecting grid frequency fluctuation or voltage instability, it can be switched from passive following to active support, and the stability of inverter under adverse grid conditions is improved by using virtual inertia and damping to suppress frequency fluctuation.

This invention discloses an adaptive control method and system for active power ramp rate, belonging to the field of new energy power system control technology. It addresses the problem that traditional control strategies in weak grid environments only consider the short-circuit ratio while ignoring impedance characteristic differences. The method includes real-time acquisition of grid node parameters to calculate the short-circuit ratio; calculation of a dynamic stability index including a control bandwidth limitation coefficient and a dynamic response delay coefficient based on the impedance ratio; construction of a voltage sensitivity model based on the short-circuit ratio; and adaptive generation of differentiated ramp rate commands for different regions. This invention explicitly utilizes grid impedance characteristics to correct the control bandwidth, significantly improving ramp efficiency in resistive weak grids through physical damping, and automatically tightening the bandwidth to ensure stability in inductive weak grids. This method effectively solves the contradiction between voltage instability and limited regulation capacity caused by grid strength differences within new energy bases, significantly improving the system's robustness and absorption capacity.

This invention discloses a method and terminal for preventing and controlling cascading trips in AC / DC hybrid power grids. It obtains a numerical change control model of the reactive power and node voltage at the energy grid-connected nodes of the AC / DC system. Based on the numerical change control model, a static voltage stability margin is created to represent the significance of node voltage fluctuations caused by reactive power changes. Preset safety constraints for the corresponding AC / DC system. Using the reactive power of the energy grid-connected nodes as input and maximizing the static voltage stability margin as the objective function, combined with the safety constraints, a cascading trip prevention and control model is created. This invention improves the prevention and control of voltage instability faults in AC / DC systems under new energy scenarios, providing a reliable guarantee for the safe and stable operation of power grids with a high proportion of new energy.

The present application relates to diesel generating equipment technical field, disclose a kind of diesel generating set anti-instantaneous overload enhancer, including protection frame, bottom plate and shell, the inside fixed connection of the latch panel is equipped with terminal box, the inside lower end of the shell is fixedly installed with circuit board, the surface of the circuit board is fixedly installed with several supercapacitors, the middle part of the shell is fixedly installed with the energy storage battery group consisting of several battery modules, the inside upper end of the shell is fixedly installed with intelligent controller.This enhancer integrates intelligent control, energy storage, waste gas energy recovery, air supplement combustion support, load prediction and heat dissipation function module, when diesel generating set encounters instantaneous heavy load, by means of air supplement combustion support, temporary power supply voltage stabilization, intelligent regulation of oil quantity, load prediction in advance and other ways, stabilize unit output, avoid speed drop, voltage instability and shutdown, ensure normal operation of electrical equipment, and with the characteristics of low energy consumption, low maintenance cost, strong applicability.

The invention provides a receiving end power grid dynamic reactive power source planning method and system under transient voltage stability evaluation, and belongs to the technical field of power system safety and stability analysis and control. The method comprises the steps of extracting operation characteristics of a target receiving end power grid and forming a multi-operation mode boundary; determining a to-be-scanned anticipated fault set; performing time domain simulation on a target receiving end power grid under the expected fault set, and constructing a multi-dimensional transient voltage stability quantitative index system based on a simulation result; generating a comprehensive transient voltage instability index of the target receiving-end power grid, performing vulnerability ranking on nodes of the target receiving-end power grid based on the comprehensive transient voltage instability index, and obtaining a dynamic reactive power support weak area; and carrying out dynamic reactive power source locating and sizing according to the dynamic reactive power support weak area to form a dynamic reactive power source planning scheme, and generating a recommended planning scheme based on time domain simulation verification. According to the method, the evaluation precision of the transient voltage stability level can be improved by fusing multi-dimensional transient voltage stability quantitative evaluation.

The present application belongs to the field of wind power generation technology, aiming at the problem of voltage instability of wind farm grid-connected point caused by wind power uncertainty and grid-connected fault, a reactive power distribution strategy based on sample entropy improved symplectic geometry modal decomposition is proposed. The strategy first decomposes the total reference reactive power of the grid-connected point through symplectic geometry modal decomposition to obtain symplectic geometry components, calculates the sample entropy and similarity threshold of each component, and reconstructs the high, medium and low frequency components. Then, according to the difference in response time of the rotor side converter of the doubly-fed wind power plant and the static synchronous compensator, combined with the coordination of the shunt capacitor, the reference power of the three is distributed according to the frequency band, and the reactive power fluctuation is coordinated and suppressed. Simulation verification shows that this method avoids the defects of traditional algorithms, maintains voltage stability while greatly reducing the configuration capacity of reactive power compensation devices, and has effectiveness and economy.