34 results about "Low voltage ride through" patented technology

A low voltage ride through detection method and device are provided. The low voltage ride through detection method comprises: determining an adjustment value of a preset parameter of a power grid based on a grid voltage, wherein the preset parameter comprises at least one of current, current frequency and power factor angle; adjusting the preset parameter of the power grid based on the adjustment value; and detecting whether the power grid satisfies a low voltage ride through condition based on the grid voltage after the preset parameter of the power grid is adjusted, thereby enabling a wind power generator to accurately identify a power grid fault under a weak power grid to enter low ride through, while avoiding instability of a power grid fault ride through system under a weak power grid.

The application discloses a kind of wind turbine group low voltage ride through model construction method and device, comprising: obtaining the operating variable dataset of wind turbine group;According to the operating variable dataset, the initial wind turbine group low voltage ride through model constructed is trained, to obtain wind turbine group low voltage ride through model.The application does not need to construct wind turbine group equivalent model and other mechanism model through the physical principle of wind turbine group, avoids the state of each wind turbine in wind turbine group is different to need to model each wind turbine respectively, and directly realizes the construction of wind turbine group low voltage ride through model through the operating data of wind turbine group, and then does not need to determine the parameter information of each wind turbine in wind turbine group, so that the application has high accuracy and high reliability.

The application relates to a low-voltage ride-through control method of a virtual synchronous generator considering power angle stability and overcurrent suppression, which comprises the following steps: obtaining a virtual synchronous generator control model, monitoring transient stability and voltage drop of the virtual synchronous generator control model, and obtaining a monitoring result; when transient synchronous instability appears in the monitoring result, adjusting an active power reference instruction during a transient period according to actual output active power by using an adaptive active power instruction strategy; and when voltage drop or voltage drop recovery appears in the monitoring result, suppressing transient impact overcurrent based on an adaptive virtual synchronous impedance control strategy. The application not only realizes non-divergence and non-fluctuation of a power angle during any voltage drop depth, but also realizes fast and smooth recovery to a normal influence mode without overcurrent.

The application provides a repeated low voltage ride through risk assessment method and system based on a sliding mode theory analysis, and belongs to the technical field of low voltage ride through risk assessment. The application comprises the following steps: based on a grid-connected system model of a grid-following type converter with low voltage ride through control, eight-order unified state space expression is constructed in combination with a current inner loop, a phase-locked loop and a dynamic of an alternating current main circuit; a sliding mode surface function is constructed by using a difference between a grid-connected point voltage and a LVRT switching threshold value, and a direction derivative of a sub-state space vector field about the sliding mode surface function in a normal operation mode and a LVRT mode is used as a chatter criterion; and the evolution trend of the grid-connected point voltage near the low voltage ride through threshold value is judged according to the sign characteristic of the chatter criterion, so as to assess the risk of repeated low voltage ride through. The application can quantitatively reflect the influence of device side and grid side parameters on the repeated low voltage ride through of the system, and provides a novel and practical method for stability assessment and parameter optimization of a new energy grid-connected system.

This invention discloses an automatic reclosing control method and system for distributed photovoltaic (PV) grid access, relating to the field of power control technology. The key technical points are: the invention first controls the first circuit breaker between the target tie line and the transformer line to close at the first moment, and then controls the second circuit breaker between the inverter of the PV power supply module and the transformer line to close at the second moment. This allows for the secondary utilization of the low-voltage ride-through current generated by the inverter, enabling instantaneous fault detection. Furthermore, when the target tie line experiences an instantaneous fault, the injected AC signal output by the inverter of the PV power supply module is controlled to increase within a preset time period. This allows for stable and reliable analysis of the low-voltage ride-through current's changing trend at the beginning of its decay phase, close to rated operating conditions, without requiring excessive monitoring equipment.

The application provides a new energy flexible direct transmission system flexible direct current station adaptive control method, including obtaining a first reference value according to an equivalent sequence network variable, electrical quantity data and a pre-fault reference value, the first reference value representing a lower limit value of an internal electromotive force reference value of a virtual synchronous machine meeting a current limiting requirement; obtaining a second reference value according to the equivalent sequence network variable and a maximum fault current, the second reference value representing a lower limit value of an internal electromotive force reference value of a virtual synchronous machine meeting a current differential protection action criterion; obtaining a post-fault reference value according to the first reference value, the second reference value and a low voltage ride through voltage threshold value, so as to perform adaptive control of the flexible direct current station. The method does not significantly increase the complexity of the system, can adaptively adjust the post-fault reference value according to the fault severity, takes into account the current limiting requirement and the correct action demand of the current differential protection, at the same time prevents the occurrence of repeated low voltage ride through phenomenon, and effectively improves the reliability of the differential protection under the power electronic weak feedback characteristic.

The present application relates to a kind of based on deep learning's grid-connected low-voltage ride-through capability evaluation method, system, equipment and medium, method includes: obtaining real off-grid sample set and low-voltage ride-through physical constraint boundary, under the guidance of physical constraint, generate synthetic off-grid sample and with normal sample merge and construct equalization training data set;Based on graph convolution-time convolution double-flow fusion network, simultaneously extract power grid topology spatial feature and fault transient time sequence feature, complete model training under physical constraint and generate the low-voltage ride-through risk score and cognitive uncertainty variance of each grid-connected point;The risk score is carried out physical consistency check and topological consistency evaluation, combined with distribution matching degree index and cognitive uncertainty variance generates multidimensional reliability index;Comprehensive reliability score is obtained by fusion, according to the comparison result of comprehensive reliability score and preset threshold value, output low-voltage ride-through capability evaluation result, and when low reliability, feedback signal is generated and returned to sample generation step, form closed loop optimization.

The embodiment of the application provides a kind of receiving end power grid DC carrying capacity multidimensional evaluation method and system, it is related to new energy power grid technical field.The method is based on the transient short-circuit capacity function of new energy low voltage ride through control characteristic and synchronous machine short-circuit current transient process.Establish the improved short-circuit ratio index again, to pass through the curve characteristics corresponding to the improved short-circuit ratio index extraction, construct voltage intensity comprehensive evaluation function.Then establish the evaluation model of receiving end power grid DC carrying capacity, and according to basic particle swarm algorithm, the evaluation model is executed iteration solution, to obtain evaluation result information.The method can form improved short-circuit ratio index by introducing transient short-circuit capacity function and new energy short-circuit capacity reliability coefficient, for dynamic quantification transient voltage support intensity, and by establishing evaluation model, form efficient evaluation mechanism suitable for high proportion new energy receiving end power grid scene under DC feed-in carrying capacity, improve the accuracy of evaluation result.

The application provides a high-proportion new energy power system frequency safety domain analysis method and system, which comprises the following steps: firstly, a power system frequency dynamic equivalent model considering the frequency modulation characteristics of new energy and the influence of low voltage ride through is constructed, thereby forming a model basis for frequency safety analysis under different disturbances and system compositions; then, a frequency safety correlation variable scanning space generation process based on equidistant network division is designed, and a frequency dynamic change process simulation under active impact is carried out in combination with the constructed frequency dynamic equivalent model, so as to obtain a system frequency response curve; finally, a parameter safety domain for power grid frequency safety is constructed. Based on the method, a corresponding system is also provided. The application constructs an aggregated frequency response model considering the differences between new energy control modes and new energy low voltage ride through, so that the new energy frequency modulation configuration under the limitation of frequency safety indexes and the system equivalent parameter safety domain boundary can be obtained through simulation under certain fault scenes.

The application provides a fault current limiting system suitable for an over-configuration network type energy storage system, which comprises: a voltage loop connected with an energy storage unit; a current limiter connected with the voltage loop; the current limiter has an asymmetric limiting boundary, that is, the maximum allowable values of d-axis and q-axis currents in a current d-q coordinate system are different; and a current loop connected with the current limiter and a power grid. The application can realize differentiated constraints of AC side reactive current and DC side active current, and improve the voltage support capability and low voltage ride through performance of the system.

The application belongs to the technical field of low-voltage ride-through control of grid-connected inverters, and provides a low-voltage ride-through control method and system suitable for asymmetric fault grid-connected inverters, models the grid-connected inverter equipment, introduces a control link of virtual impedance in the reactive power-voltage loop of the grid-connected inverter, uses the positive and negative sequence separation method, constructs a positive and negative sequence equivalent circuit diagram, analyzes the influence of the virtual impedance on the current limiting and the positive and negative sequence grid-connected point voltage based on the negative sequence equivalent circuit diagram, designs the impedance ratio of the virtual impedance during the asymmetric fault, limits the maximum phase current of the grid-connected inverter within the set current limit value, and limits the overcurrent output of the grid-connected inverter; gives a phasor diagram of the positive and negative sequence network under asymmetric fault, sets the positive and negative sequence voltage amplitude, respectively calculates the value of the positive and negative sequence virtual impedance required for supporting the positive and negative sequence grid-connected point voltage; and gives the maximum voltage support range of the grid-connected inverter during the asymmetric fault.

The utility model relates to the field of power electronics, especially low voltage crossing device, it includes voltage monitoring unit, compensation voltage generating system and overhauling isolation device. In the utility model, the device is in series between power supply and protected load, carries out real -time power grid voltage monitoring through bridge circuit, and carries out difference calculation, and the required compensation voltage is accurately generated on this basis, once finds that power supply voltage deviates from rated voltage level, generates a suitable compensation voltage injection system through energy storage device and IGBT inverter system, and the purpose of this compensation voltage is to offset the drop of power grid voltage, thereby realizes the effective management of voltage sag, guarantees load side voltage stability, ensures that sensitive load still can be unaffectedly operated when power grid voltage is abnormal.

An improved method of low-voltage ride-through protection of a coal feeder based on DCS logic control.The prior art has frequent large changes in the rotating speed of the coal feeder during coal cutting; when the rotating speed signal detected in the coal feeder changes greatly, the internal program judges that the rotating speed is abnormal, which causes the coal feeder to trigger a trip signal by mistake, and brings great safety hazards to the normal operation of the unit.The present application comprises the following steps: (1) an internal program modification method of the coal feeder microcomputer board; (2) a low-voltage judgment method of the coal feeder control loop; (3) a logic configuration method of the self-starting of the low-voltage fault of the coal feeder; (4) a fault simulation method of the internal program of the coal feeder; (5) a setting method of the internal parameters of the frequency converter of the coal feeder; an alternative control method of the low-voltage ride-through control device of the coal feeder is proposed, which solves the problem of the coal feeder tripping by mistake due to the rotating speed during coal cutting.The present application is used for the improved method of low-voltage ride-through protection of the coal feeder based on DCS logic control.

This invention discloses a high- and low-voltage ride-through control method for energy storage converters under grid-connected conditions, addressing the problem that existing high- and low-voltage ride-through control methods easily induce impulsive overcurrent in the grid-connected current, posing a threat to the energy storage converter itself and the power system. The method includes: 1) calculating the rated AC phase voltage and current, rated DC voltage, AC inductance, and AC equivalent resistance; 2) calculating the capacitance parameters of the DC energy storage link; 3) determining the reactive current setpoint of the energy storage converter during grid-connected control and the active current setpoint after adding total current limiting; 4) calculating and obtaining the three-phase SPWM modulation waveform of the energy storage converter; 5) calculating the two switching pulse values ​​for each half-bridge power module, and then generating corresponding switching drive pulses to achieve high- and low-voltage ride-through control. This method can effectively suppress current overshoot, voltage surges, and power oscillations during the ride-through process, ensuring the stability and reliability of the energy storage converter's operation.

The application discloses a wind turbine low-voltage ride-through parameter setting method, equipment and medium, which is applied to the technical field of new energy power generation grid connection control and power system safety and stability. The method relies on a power system transient simulation model, and the influence law of active and reactive current parameters on system frequency, power angle stability, transient overvoltage and mechanical load characteristics of the wind turbine in the low-voltage ride-through process is clear. The reactive current parameter is set for the critical working condition of large-scale access of the wind farm to the weak power grid, near-end three-phase short-circuit fault and maximum equivalent impedance of the power grid after removal, and the active current parameter is set for the composite working condition of maximum frequency drop, minimum power angle stability margin and strongest transmission chain load impact, so that the problem that multiple targets of the existing control strategy are difficult to consider is effectively solved, system stability and equipment safety are considered, various operation risks are avoided, multiple index collaborative optimization is realized, the low-voltage ride-through capability of the wind turbine and the adaptability of the power grid are improved.

The present application belongs to the field of power supply and distribution, and particularly relates to a high and low voltage ride-through control method for an energy storage converter based on a large prediction model. The method identifies the trend of the grid voltage in real time by constructing a dynamic prediction model, and calculates the support duration for the current fault ride-through by combining a multi-objective optimization algorithm. The method can effectively expand the fault ride-through curve range of the converter, so that the support duration can still be dynamically extended after the end of the standard specified ride-through time according to the actual demand of the grid, thereby solving the problem of insufficient reactive power support leading to system stability decline under the condition of grid fault outside the standard curve, and realizing the transformation of the converter from passive compliance off-grid to active delay support. The present application uses a large prediction model to predict the voltage recovery trend in advance, dynamically adjusts the ride-through strategy under the premise of ensuring the safety of the equipment, avoids the thermal stress risk caused by blindly extending the support, and improves the resilience of the grid.

This invention pertains to the field of power supply and distribution, and particularly relates to a high- and low-voltage ride-through control method for energy storage converters based on a large-scale predictive model. This method constructs a dynamic predictive model to identify grid voltage trends in real time, and combines this with a multi-objective optimization algorithm to calculate the support duration for the current fault ride-through. This method effectively expands the range of the converter's fault ride-through curve, allowing it to dynamically extend the support duration based on actual grid needs even after the standard ride-through time has expired. This solves the problem of insufficient reactive power support leading to decreased system stability under grid faults outside the standard curve, enabling the converter to shift from passive compliant grid disconnection to proactive extended support. This invention utilizes a large-scale predictive model to anticipate voltage recovery trends in advance, dynamically adjusting the ride-through strategy while ensuring equipment safety. This avoids the thermal stress risks associated with blindly extending the support duration and enhances grid resilience.

The application discloses a calculation method of short-circuit current of a new energy double-fed unit during low-voltage penetration, and is specifically implemented according to the following steps: a short-circuit current simplified model is established; an RT-LAB semi-physical simulation platform is used to build a new energy double-fed unit grid-connected system, and short-circuit currents of the unit under different fault scenes are obtained; simulation test is carried out; a least square method is used for data fitting of the short-circuit current during the low-voltage penetration stage, key parameters of the short-circuit current model are obtained, thereby forming calculation models of the short-circuit current during the Crowbar input stage and the RSC reactive power control stage, and finally forming a practical short-circuit current calculation model of the new energy double-fed unit. The calculation model is clear, has strong universality and operability, through the RT-LAB semi-physical simulation combined with the control characteristics of the actual new energy unit converter, the actual operation condition of the field is more approached, the calculation amount is reduced, the time required for calculation is shortened, and the calculation efficiency is improved.

The application relates to a low-voltage ride-through control parameter identification method, device, equipment and medium. The method comprises the following steps: obtaining multiple groups of initial monitoring data of a distributed power supply under a low-voltage ride-through working condition, dividing the multiple groups of initial monitoring data based on grid-connected point voltage data to obtain first monitoring data belonging to a first voltage drop interval and second monitoring data belonging to a second voltage drop interval, fitting reactive compensation current data in each group of first monitoring data based on a preset first function relationship to obtain a first control parameter value, and fitting the reactive compensation current data and the grid-connected point voltage data in each group of second monitoring data based on a preset second function relationship to obtain a second control parameter value. The method can utilize the segmented corresponding relationship between the reactive compensation current and the grid-connected point voltage under the low-voltage ride-through working condition to inversely calculate the low-voltage ride-through control parameter inside the distributed power supply from external electrical quantities.

The application discloses a kind of wind power grid-connected system transient overvoltage evaluation methods considering unit dynamic characteristics, it is related to new energy grid-connected technology field.The method first establishes the wind turbine model considering grid following control and low voltage ride through dynamics, deduces the dynamic constraint condition of reactive current support coefficient;Second, construct the equivalent admittance of unit during fault and embed system original admittance matrix, obtain the modified system impedance matrix;Further based on dynamic constraint condition, the reactive current support coefficient value is revised and impedance matrix is updated, the transient voltage increment caused by unit injection current during fault is calculated;Finally, traverse fault scene output evaluation result.The application realizes decoupling solution with linear network by converting the nonlinear dynamics of unit into equivalent admittance, while significantly improving the calculation efficiency, effectively describes the dynamic mechanism such as direct current bus voltage constraint, and guarantees the accuracy of transient overvoltage evaluation.

The application discloses a kind of port low voltage ride through control system and method.The application includes photovoltaic module carries out photoelectric conversion, is carried out three-phase interleaved boost by voltage conversion module, energy storage control module stores energy, by grid module detects grid fluctuation degree, when voltage fluctuation degree reaches first fluctuation threshold or when the time length reaching second fluctuation threshold exceeds timing time, energy storage control module discharges and by voltage conversion module carries out inverter frequency conversion, for the power supply of connected port load, according to the voltage size of the electric energy output by photovoltaic module and first voltage threshold, second voltage threshold and third voltage threshold, the electric energy superposition degree of control output conversion module.The application can carry out electric energy compensation processing to grid module, avoid voltage fluctuation of grid module, realize uninterrupted power supply, according to photoelectric state, carry out branch power supply, improve electric energy utilization.

The application discloses a low-voltage ride-through power grid transient fault detection method and system based on FPGA, and relates to the technical field of electric measurement.The detection method comprises the following steps: S01, multi-dimensional feature parallel extraction: processing three-phase voltage signals of a power grid based on an FPGA parallel computing unit to obtain voltage characteristic quantities; S02, trend prediction: constructing a parallel prediction engine inside the FPGA, and based on the voltage characteristic quantities, extrapolating the voltage trend in a preset future time window in real time.The application predefines a medical device interference fingerprint library inside the FPGA, and the FPGA matches real-time characteristic quantities with templates through a parallel comparator array.When the characteristic quantities simultaneously satisfy each threshold range and duration window, the interference is determined and an interference matching flag is outputted, a confidence degree calculation unit dynamically allocates fusion weights according to the flag, the weight of a harmonic distortion rate and other easily interfered characteristic quantities is automatically reduced when the interference is identified, the basic weight is restored when there is no interference, and the real fault can be accurately identified.

The application belongs to the technical field of reactive power support of power grid, and particularly discloses a reactive power support coefficient setting method and system based on a support controllable field, which comprises the following steps: when a converter enters asymmetric low voltage ride through, determining the constraint condition required by the grid-connected point positive sequence voltage and negative sequence voltage output by the converter, and then determining the relationship between the positive sequence voltage and the negative sequence voltage and the voltage boundary; within the voltage boundary, determining the constraint range of the positive sequence support coefficient and the negative sequence support coefficient of the converter based on the constraint condition and the reactive power support strategy of the converter; further determining the controllable field of the positive sequence support coefficient and the negative sequence support coefficient; when the converter performs reactive power support, dynamically selecting the positive sequence support coefficient and the negative sequence support coefficient within the controllable field. Through the dynamic selection of the positive and negative sequence support coefficients, the application takes into account the power grid support effect and the safe operation boundary of the equipment, and improves the positive sequence reactive power support effect of the converter.

The present application relates to the technical field of new energy dynamic reactive power support, and provides a new energy dynamic reactive power support capability evaluation method and system based on equivalent reactance. The new energy dynamic reactive power support capability evaluation method based on equivalent reactance comprises: according to whether the current reaches the current limit during low voltage ride through of a new energy station, and combining different voltage drop conditions of a grid-connected point, the equivalent reactance of the low voltage ride through of the new energy station is calculated; the equivalent reactances corresponding to different voltage drop conditions of the grid-connected point are accumulated, and then the average value is obtained to obtain a comprehensive support stiffness which is taken as an evaluation index of the new energy dynamic reactive power support capability; when the distance between the grid-connected point and the power grid exceeds a set distance, the smaller the comprehensive support stiffness, the better the support effect of the dynamic reactive current increment scheme on the voltage of the grid-connected point during voltage drop. The present application can make the evaluation result more in line with the actual situation, so as to guide the voltage stability operation decision of the new power system.

The application relates to a coal pulverizing system and coal feeder low-voltage ride-through collaborative control method and system, and belongs to the technical field of automatic control of coal-fired units. The method comprises the following steps: collecting system data in real time, performing collaborative state estimation through a dual-core driving model combining an LSTM integrated with a Monte Carlo Dropout module and a physical model; based on the estimated value, generating start-stop control instructions through model predictive control (MPC) rolling optimization; judging the low-voltage working condition through a two-out-of-three logic, triggering the coal feeder protection process and adjusting the pulverizing system parameters, and dynamically assigning the coal feeder full-stop protection delay according to the pulverizing working condition; and constructing a four-level safety mechanism including a low-voltage special protection level to perform collaborative risk disposal. The application solves the system interruption problem caused by independent operation of the pulverizing system control and the coal feeder protection, realizes self-adaption and uninterrupted and smooth operation of the whole pulverizing start-stop process under voltage fluctuation, and significantly improves the operation reliability, safety and economy of the unit.

The embodiment of the application relates to the field of power system automatic control, and discloses a self-adaptive low-voltage ride-through control method, a controller, a system, equipment and a medium. In the method, the operation state of an SVG is monitored, and the operation state is used to represent the reactive power output state of the SVG; when a power grid fault occurs, a control strategy corresponding to the operation state monitored before the fault occurs is determined as a target control strategy of the SVG according to a pre-set corresponding relationship between the operation state and the control strategy; the corresponding relationship includes N operation states and control strategies corresponding to the N operation states one by one, and N is greater than or equal to 2; and the target control strategy of the SVG is executed. Through the above method, multiple operation scenes of a pure power electronic power system are adapted, voltage support and fault recovery overvoltage suppression are considered, and stable operation of the system is ensured.

The application discloses a network-constructing type converter low-voltage ride-through control method and system, and belongs to the technical field of converter control. The method comprises the following steps: judging the voltage drop degree of a current grid-connected point and the residual overcurrent capacity of a converter according to a sampled grid-connected point and an output current, and then determining the priority of voltage and frequency support; when the overcurrent capacity upper limit is not reached, voltage and frequency are simultaneously supported; when the overcurrent capacity upper limit is reached, voltage support is preferentially ensured; if the expected voltage support effect is reached, the residual overcurrent capacity is used for frequency support; and if the expected voltage support effect is not reached, the overcurrent capacity is used for maximum voltage support. The method can realize a four-quadrant flexible regulation and control low-voltage ride-through control strategy based on local electrical quantities without relying on external parameters, and can adaptively adjust virtual internal potential and active instructions under different drop depths, so that the grid-connected point voltage support is maximized under the premise of not overcurrent.

This invention discloses a high-low voltage ride-through coordinated control system for a flywheel energy storage device. The grid-side converter of the flywheel energy storage device operates in constant voltage mode. When the grid voltage reaches the high-low voltage ride-through threshold, it limits active power and maximizes reactive power output to support the grid. The generator-side converter operates in constant power mode. When the DC bus voltage instability reaches the threshold, it switches to constant voltage mode and simultaneously limits the upper limit of active power. After the grid voltage recovers, the grid-side converter and the generator-side converter sequentially resume their initial operating modes. This invention achieves automatic coordination and control without adding additional coordination and control equipment, utilizing the sampling and control systems of the generator-side converter and the grid-side converter themselves. This ensures that the flywheel energy storage device has the ability to remain connected to the grid and operate continuously even when the grid connection point voltage experiences sudden changes within the region.

The embodiment of the present application provides a kind of photovoltaic inverter low voltage ride-through current control method and control device.The method comprises: obtaining grid real-time voltage and the output current of photovoltaic inverter;According to the difference between grid real-time voltage and preset voltage threshold, adjust the d-axis current component and / or q-axis current component of the output current of photovoltaic inverter, so that grid real-time voltage and the output voltage of photovoltaic inverter are synchronized, realize the low voltage ride-through of photovoltaic inverter.The technical scheme provided by the embodiment changes the d-axis current component and / or q-axis current component of the output current of photovoltaic inverter, so as to avoid that the output current is too large to cause unstable current control, control grid real-time voltage and the output voltage of photovoltaic inverter are synchronized, thereby improve the stability of photovoltaic inverter output voltage, and then improve the stability of grid under the condition of photovoltaic inverter phase-locked loop failure under grid fault.

Based on the integration of photovoltaic inverter high and low voltage ride through control parameters and electrical parameters identification method, including: building photovoltaic inverter semi-physical test platform, and under different conditions of high and low voltage ride through test, get the data set required for parameter identification; With the current and power measured value under high and low voltage ride through as the optimization target, the hybrid frog leap algorithm is adopted (the control parameters under corresponding control mode are identified respectively; According to the measured voltage value under high and low voltage ride through as the optimization target, the improved dichotomy search method is adopted to optimize the fault impedance, so that the simulation voltage and the measured voltage tend to be consistent; The PSASP photovoltaic mechanical model is established and the control parameters and electrical parameters identification results are brought in, and the error value of voltage, current and power under corresponding control mode is calculated. This method realizes the batch automatic identification and accurate setting of new energy mechanical and electrical simulation model impedance under voltage drop multi working condition, greatly improves the multi working condition setting precision and data acquisition efficiency of new energy mechanical and electrical simulation model.