89 results about "Power system stability control" patented technology

The invention relates to the technical field of power system stability control, in particular to a broadband oscillation suppression method and system for an offshore wind power flexible direct current grid-connected system and a medium, and the method comprises the steps: sequentially injecting positive and negative sequence perturbation sine harmonic signals at a grid-connected point of a wind turbine generator, constructing a multi-input multi-output impedance matrix, reducing the order of the multi-input and multi-output impedance matrix into single-input and single-output equivalent positive sequence impedance; the stability margin of the offshore wind power flexible direct current grid-connected system is obtained based on equivalent positive sequence impedance quantification; when the stability margin is lower than a preset margin threshold value, reconstructing the fan grid-side converter into a matrix control structure by cascading a weighting coefficient matrix between the inner and outer ring control loops of the fan grid-side converter; and iteratively optimizing the matrix type control structure based on impedance sensitivity, and synchronously connecting a low-pass filter in series in a voltage and current feedback channel to carry out impedance remodeling so as to finish broadband oscillation risk suppression. According to the invention, broadband oscillation suppression of the offshore wind power flexible direct current grid-connected system is realized through impedance modeling and a matrix type control strategy.

The invention belongs to the technical field of power system stability control, and particularly discloses an inverter network following and constructing control mode adaptive adjustment method and system, and the method comprises the steps: obtaining a current power grid state parameter in real time; a multi-scale fusion depth evaluation model is constructed and trained; inputting the current power grid state parameters into the trained multi-scale fusion depth evaluation model, and outputting current power grid state evaluation indexes; according to the current power grid state evaluation index, adaptively selecting a control mode, wherein the control mode comprises a network following type inverter dominant mode, a network constructing type inverter dominant mode and a transition mode; and according to the selected control mode, verifying whether the power grid state satisfies a constraint condition, and if not, carrying out global optimization on the control parameters of the inverter. According to the invention, the dynamic stability and disturbance response capability of the power system can be improved through the adaptive adjustment of the network-following type and network-constructing type control modes of the inverter.

The invention discloses a method for suppressing subsynchronous oscillation of a doubly-fed grid-connected system, and relates to the technical field of stability control of a power system, and the method comprises the specific steps: S100, extracting the amplitude and phase angle of a subsynchronous frequency component, S200, generating a rotor compensation current instruction according to the amplitude and phase angle of the subsynchronous frequency component and a dynamic gain, and S200, generating a rotor compensation current instruction according to the rotor compensation current instruction; s300, dynamically adjusting the gain according to the suppression ratio and the amplitude of the target magnetic field during operation, S400, calculating the feed-forward decoupling voltage, S500, calculating the suppression ratio after injection, and executing a hierarchical control strategy. Subsynchronous oscillation suppression from the electromagnetic essential level is realized, and by monitoring the subsynchronous component of the air-gap magnetic field in real time and injecting the anti-phase compensation current at the rotor side, the suppression efficiency of the subsynchronous oscillation is improved. Active interference of a stator magnetic field and a rotor magnetic field in a subsynchronous frequency band is cancelled, an energy transfer path of subsynchronous oscillation is directly blocked, oscillation forming conditions are destroyed, and a dynamic gain adjustment mechanism optimizes compensation intensity according to a real-time suppression effect so as to cope with 5-45Hz subsynchronous oscillation frequency change.

The invention discloses a stability criterion method considering a current amplitude limiting link for a network construction type energy storage system, and belongs to the field of stability control of a power system. According to the invention, the problem of virtual power angle switching after current saturation of the grid-forming converter is solved. The equivalent acceleration area and the equivalent deceleration area serve as the reflection of the energy increment and the energy decrement in the transient process of the converter, and the transient synchronization stability of the grid-connected system of the grid-forming type energy storage converter can be conveniently judged by comparing the acceleration area and the deceleration area or comparing the fault cut-off angle and the limit cut-off angle; the research result has a certain significance in improving the stability of the network construction type energy storage equipment.

The invention relates to the technical field of power system stability control, in particular to a new energy station transient voltage and frequency coordination stability control method, which comprises the following steps of: analyzing a transient energy evolution rule of an equivalent synchronous motor and stored energy by constructing an alternating current and direct current hybrid dynamic model and fusing with multi-time scale characteristics; based on dynamic weight matrix optimization and a multi-target coordination control strategy, self-adaptive balance of power distribution is realized; a nonlinear feedback algorithm and a real-time compensation mechanism are designed in combination with the Lyapunov theory, and voltage frequency fluctuation in a disturbance scene is suppressed; establishing a multivariable cooperative control architecture, and dynamically adjusting a power adjustment priority and an inertia time constant through coupling iterative optimization of a source storage cooperative strategy to realize adaptive compensation of a transient energy propagation path; according to the method, the dynamic stability and the anti-interference capability of the new energy station under transient impact are remarkably improved, and safe operation of a high-proportion new energy power grid is guaranteed.

The invention discloses an SVG-containing power grid stability adaptive control method and system under a complex working condition, and relates to the technical field of power system stability control, and the method comprises the steps: analyzing a key operation working condition with the worst system stability; on the basis of the change condition of the operation condition, simplifying the worst key operation condition small interference robust stability problem, and obtaining an SVG control parameter set; based on the SVG reactive current collected in real time, the system adaptively selects SVG control parameters to control the stability of the power grid. According to the method, by adaptively adjusting the control parameters of the SVG, it can be ensured that the CSCR of the system is always reduced under the key operation condition of the SVG, and therefore the stability of the system is improved; the offline calculation of the control parameter set and the online adjustment of the control parameters are combined, so that the reasonability of the control parameters is ensured, and the response speed of the system is improved.

The invention relates to the technical field of power system stability control, and discloses a hybrid synchronous phase modifier quick response coordination control system with inertia support. According to the invention, wide-area data such as voltage phase, frequency deviation and the like are collected and verified through the data sensing module; the modal evaluation module calculates a global motion modal cooperation coefficient G to quantify the dynamic cooperation degree of the system; the coordination control module dynamically switches an emergency instability or preventive damping mode based on G, and generates a coordination control instruction of the phase modifier and the SVG; and the execution feedback module forms a closed loop and optimizes parameters, and realizes efficient response in combination with a layered distributed architecture. According to the invention, deep cooperative control of the two is realized, the disturbance resistance and stability maintenance capability of the power system are improved, and the method is suitable for a power grid with high-proportion renewable energy access.

The invention discloses a configuration method and system for a network-constructing type energy storage system for suppressing broadband oscillation, and relates to the technical field of new energy power generation grid connection and power system stability control. The invention aims to solve the problems that broadband oscillation is easily caused when a new energy field station is connected into a weak power grid, an existing suppression method affects equipment characteristics or needs additional investment, and netting type energy storage locating and sizing lacks scientific guidance. The method comprises the following steps: firstly, simplifying a system comprising a new energy station, a constructed network type energy storage system and a power grid, then carrying out impedance modeling on the two systems (reserving complete impedance characteristics of energy storage), and judging the stability through an impedance analysis method; and the optimal capacity is determined at a single position, and then the global optimal capacity and the corresponding position are determined by traversing the positions, so that low-cost broadband oscillation suppression is realized.

The invention discloses a wind power plant network following / constructing type fan proportion optimization configuration method and device, a medium and a product, and belongs to the technical field of new energy power system stability control, and the method comprises the steps: collecting the operation data of a wind power plant and a power grid, and carrying out the standardization preprocessing; constructing a typical operation scene set based on the preprocessed data; establishing an equivalent model of a following network type fan and a construction network type fan and a coupling model with a power grid; constructing a frequency, voltage and transient stability index system based on the coupling model; designing constraint conditions containing stability indexes; constructing a multi-objective optimization function with stability priority; solving by adopting a global optimization algorithm to obtain an optimal fan proportion solution set; and performing simulation verification and scheme screening on the optimal solution set, and determining a final configuration proportion. On the premise of ensuring the stability of the power grid, the proportion of different types of fans in the wind power plant is scientifically configured, and the safe and stable operation capability of a high-proportion new energy power system is effectively improved.

The invention provides a double-input-signal virtual power system stabilizer optimization method, and relates to the technical field of power system stability control. Multi-source signals during VPSS operation are collected in real time and subjected to normalization processing, a one-dimensional time sequence signal is converted into a two-dimensional image matrix through a GASF and a GADF, and the time dependence and the dynamic phase relation of the signals are completely reserved; the physical variable frequency-power coupling is coded through a multi-channel GAF matrix; a lightweight convolutional neural network is adopted, optimization features are extracted from a GAF matrix, and VPSS control parameters are dynamically adjusted by combining a near-end strategy optimization algorithm with Lyapunov stability guarantee; introducing an online learning mechanism and an abnormal switching strategy; a closed-loop framework of signal acquisition, feature coding, mode extraction, parameter optimization, control output and abnormity recovery is adopted, system response is fed back in real time, parameters are adjusted to balance dynamic performance and steady-state efficiency of the system, and the VPSS3B is made to adapt to various operation conditions of access of the network-building type converter.

The present application belongs to the technical field of power system stability control, and specifically discloses a method and system for adaptively adjusting the grid-following and grid-forming control modes of inverters, the method comprising: obtaining the current grid state parameters in real time; constructing and training a multi-scale fusion deep evaluation model; inputting the current grid state parameters into the trained multi-scale fusion deep evaluation model, and outputting the current grid state evaluation index; adaptively selecting a control mode according to the current grid state evaluation index, the control mode comprising a grid-following inverter dominant mode, a grid-forming inverter dominant mode, and a transition mode; verifying whether the grid state meets the constraint conditions according to the selected control mode, and if not, globally optimizing the control parameters of the inverter. The present application can improve the dynamic stability and disturbance response capability of the power system by adaptively adjusting the grid-following and grid-forming control modes of the inverter.

The invention discloses a power distribution area energy storage-photovoltaic oscillation cooperative suppression method based on impedance remodeling, and belongs to the technical field of power system stability control. According to the method, the impedance characteristic of the system is scanned online in real time, the virtual impedance controller parameters of the photovoltaic inverter are dynamically optimized, and the impedance frequency characteristic of the zone area network is actively remodeled, so that the zone area network is always far away from a stable critical point, and oscillation is prevented from occurring from the source. When it is detected that the oscillation energy exceeds the standard, the system immediately triggers the energy storage device to be switched to a virtual synchronous generator mode, phase information of a plurality of energy storage units in a fiber channel synchronization cluster is used, anti-phase damping current opposite to the oscillation trend is injected, and the oscillation energy is rapidly consumed. The invention provides a double-layer suppression strategy based on impedance remodeling and energy storage cooperation, the cooperation of photovoltaic impedance active prevention and energy storage instantaneous suppression is realized, the problem that a traditional fixed parameter damper loses efficacy due to frequency drift is solved, and the operation stability of a high-proportion renewable energy power distribution network is improved.

The invention discloses a multi-frequency subsynchronous oscillation self-adaptive suppression method for a doubly-fed wind power generation system, and belongs to the technical field of power system stability control. The invention aims to solve the problem that an existing method only suppresses single oscillation frequency and cannot guarantee stable operation of a wind turbine generator and a power grid. Comprising the steps that discrete current signals of the double-fed wind power generation system are collected, a sparse Fourier observer is used for sequentially conducting frequency spectrum rearrangement, window function filtering, frequency domain down-sampling and fast Fourier transformation, positioning circulation and valuation circulation on the discrete current signals, and the frequency and amplitude of subsynchronous oscillation components of the double-fed wind power generation system are obtained; a parallel multi-frequency self-adaptive wave trap is connected into a rotor side converter control loop of the doubly-fed wind power generation system, parameters of the wave trap are dynamically adjusted, and a suppression signal opposite to a subsynchronous oscillation component is output to filter out the subsynchronous oscillation component. According to the invention, the subsynchronous oscillation of the power system can be effectively suppressed under the condition of high-proportion new energy access.

The invention discloses a synchronization stability judgment method of a network-forming type energy storage system, and belongs to the field of stability control of a power system. The method comprises the following steps: constructing a synchronous stable mathematical model of a grid-connected system of a network-forming type energy storage converter; calculating the equivalent acceleration area of the network-forming energy storage converter after the disturbance occurs; calculating the deceleration area of the network-forming type energy storage converter after the fault is cleared; calculating a limit cut-off angle and judging the stability of the system. According to the method, a criterion suitable for judging the transient synchronization stability of the grid-forming type energy storage converter is provided, and the equivalent acceleration area and the equivalent deceleration area serve as the reflection of the energy increment and the energy decrement in the transient process of the converter; by comparing the acceleration area and the deceleration area, the transient synchronization stability of the grid-connected system of the grid-forming type energy storage converter can be conveniently judged. The research result has a certain significance in improving the stability of the network construction type energy storage equipment.

The invention discloses a high-proportion new energy sending end power grid stability cooperative control method, and relates to the technical field of power system stability control, and the method comprises the steps: S1, building an AC / DC sending end power grid temporary overvoltage model; s2, establishing a transient voltage stability model of the alternating-current and direct-current sending-end power grid; s3, establishing a transient stability model of the phase modifier; s4, constructing a multi-dimensional stability collaborative improvement objective function; s5, establishing a multi-dimensional stability collaborative improvement constraint condition; and S6, solving based on the multi-objective optimization function constructed in the step S4 and the constraint conditions constructed in the step S5. According to the method, a multi-dimensional analysis model of'temporary overvoltage-transient voltage stability-phase modifier power angle stability 'is constructed, so that the functions of unified modeling and collaborative optimization are realized, and multiple stability risks and dominant factors thereof faced by a power grid in different fault scenes can be accurately and quantitatively evaluated; and a clear theoretical basis and target are provided for implementing cooperative control.

The invention discloses a broadband oscillation active damping method, system and device based on MMC sub-module cluster collaboration and a storage medium, and relates to the technical field of power system stability control, and the method comprises the steps: collecting the electrical quantity of a power grid in real time, and recognizing a broadband oscillation mode and characteristic parameters through a signal processing algorithm; equivalent circuit parameters of the programmable virtual resonator are calculated, and the number of sub-modules of a sub-module cluster is determined in combination with the real-time states of the sub-modules of the modular multilevel converter; generating a control instruction according to the parameter and the oscillation component, and adjusting a sub-module pulse width modulation signal; oscillation amplitude attenuation, a damping ratio and a sub-module state are continuously monitored, adjustment is performed according to an evaluation result, and safe operation is ensured; the method can accurately suppress power grid oscillation, improves the utilization rate of the MMC device, saves the cost, is high in self-adaption, guarantees the reliable operation of the system, reduces the loss, is easy to expand and maintain due to the modular design, and improves the stability of the power system.

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 present application relates to the technical field of power system stability control simulation analysis, and provides a transient simulation analysis and decision method, device and equipment for power grid harmonic oscillation, which comprises the following steps: combining the model and model parameters of electromagnetic transient offline simulation with the topology of the power grid to be analyzed to obtain an electromagnetic transient example, and then describing the calculation process of electromagnetic transient with a hierarchical directed acyclic graph, and taking each calculation model with redistributed resources as the electromagnetic transient algorithm; performing risk analysis on the harmonic oscillation condition according to the simulation result, and making an optimized decision on the harmonic oscillation suppression measures; through example design and electromagnetic transient algorithm design, an electromagnetic online simulation model is constructed to meet the simulation requirements of large power grids and realize the analysis and suppression decision of harmonic oscillation.

The present application relates to the technical field of power system stability control, and particularly relates to a high-proportion wind power access system wide-frequency oscillation suppression method based on impedance shaping. The content comprises: constructing a frequency domain output impedance matrix, extracting a dominant wide-frequency oscillation coupling mode frequency band, introducing a mode suppression driven impedance shaping compensation mechanism, constructing a mode suppression driving quantity based on the mode direction in the dominant wide-frequency oscillation coupling mode, and performing local impedance shaping on the output impedance; based on the mode suppression driving quantity, quantifying the mode interference sensitivity between wind power converters, and introducing an impedance shaping gain correction mechanism based on the mode interference sensitivity, to correct the target output impedance after local shaping. The problems that the shaping process cannot effectively adjust dynamically according to the equipment capacity of the wind power converter and the frequency risk, resulting in no difference shaping and excessive compensation, and the problems that the interference coupling between the wind power converters cannot be effectively suppressed, resulting in excessive oscillation or suppression are solved.

This application relates to the field of power system stability control technology, specifically to a method and system for online stability assessment and control of hybrid systems based on an improved short-circuit ratio. The method includes: constructing an equivalent model of the integrated / grid-connected hybrid system; calculating the improved short-circuit ratio of multiple renewable energy power plants based on the voltage source characteristics of grid-connected equipment to quantify the grid strength at each grid connection point; constructing a characteristic polynomial based on the impedance matrix; and using the circular loop theorem to quickly search for the dominant eigenvalues, avoiding high-dimensional calculations, to obtain the critical short-circuit ratio. If the real-time short-circuit ratio is lower than the critical value, an instability risk is determined, triggering a control strategy that increases the capacity of grid-connected equipment or adjusts the grid connection point. This method, through the combination of the improved short-circuit ratio and the circular loop theorem, achieves online quantitative assessment and closed-loop control of the small-disturbance stability of integrated / grid-connected hybrid systems.

The invention provides a new energy unit phase-locking synchronous stability control method and related equipment, and relates to the technical field of power system stability control, and the method comprises the steps: determining a phase-locking synchronous stability boundary of each output combination of a new energy unit and a thermal power unit in an amplitude limiting range when a fault of a new energy combined thermal power output system is removed; according to the actual new energy output, the actual current value and the actual thermal power output, a target phase locking synchronous stability boundary is matched; if it is determined that the new energy unit has a phase locking instability risk according to the target phase locking synchronous stability boundary, the actual current value of the new energy unit is reduced within the amplitude limiting value range; and after the actual current value is reduced to the lower limit value of the current limiting value range, if the new energy unit still has the phase locking instability risk, adjusting the operation condition of the new energy unit or the thermal power unit until the phase locking synchronization stability of the new energy unit meets the operation requirement. Therefore, the phase locking synchronization stability is improved by adjusting the self control of the unit.

The invention discloses a mine load adaptive control method, device and system, and belongs to the field of novel power system stability control and mine production, and the method comprises the steps: determining a hierarchical multi-round control strategy based on power grid power demand data and real-time production data of a mine load in response to a power grid dispatching power demand; a round control instruction is generated based on the hierarchical multi-round control strategy; and issuing a round control instruction to the basic automatic control device, wherein the round control instruction is used for instructing the basic automatic control device to control the mine load of the corresponding round to carry out power adjustment. According to the method, the active supporting effect of the mine load on the power grid can be fully exerted, the load can be accurately controlled according to the actual power requirement and the production process condition by adopting the flexible control strategy, then the adjustable load potential is fully excavated, and safe and stable operation of mine production is guaranteed.

The invention discloses a wind storage automatic power generation control optimization method, and relates to the technical field of power system stability control, and the method comprises the steps: constructing an automatic power generation control model containing a wind turbine generator and an energy storage system, introducing a per-unit coefficient by the wind turbine generator through droop adjustment and a virtual inertia response strategy, and building an open-loop transfer function, the energy storage system adopts a first-order inertial model; constructing an improved MPC control model fused with the PIDN, connecting a feedforward control component of the MPC with a feedback control component of the PIDN in parallel, and generating a unified control signal to drive a wind turbine generator and an energy storage system to perform power adjustment; and carrying out global optimization on model predictive control MPC parameters by adopting an STOA algorithm and taking ITAE indexes of frequency deviation and tie line power deviation as optimization targets. According to the method, the system frequency stability and the power regulation precision are effectively improved, and the dynamic performance and the robustness of wind and storage combined participation in automatic power generation control are enhanced.

The invention belongs to the technical field of stable control of a power system, and particularly discloses a power angle compensation-based method for quickly recovering active power after a fault of a network-forming converter, which comprises the following steps of: monitoring a voltage amplitude and a power difference value at a grid-connected point of the network-forming converter in real time; according to the voltage amplitude and the power difference value, identifying whether the network-forming converter is in an unstable state of active power oscillation after the fault is cleared; if the state is identified as an unstable state, calculating a power angle compensation amount used for counteracting power angle deviation caused by a fault based on detected voltage drop information and system impedance parameters; and superposing the power angle compensation value to a power angle generated by a power control ring of the network-forming type converter, and generating a compensated power angle instruction for controlling pulse modulation of the converter so as to realize active power recovery after the fault is cleared. The method can adapt to different power grid impedance conditions, quickly suppress power oscillation and realize quick recovery of active power, so as to improve the transient stability and reliability of a novel power system.

The invention relates to the technical field of power system stability control, and provides a new energy black-start partition optimization method considering unconventional risks, which comprises the following steps: simulating unconventional risks possibly encountered by a power system by adopting Monte Carlo sampling; extracting the output characteristics of wind power under the unconventional risk by adopting variational mode decomposition, and performing output prediction in combination with a long-short-term memory neural network; a power system recovery partition is divided based on an LPA algorithm, and the LPA algorithm is improved by considering a partition size balance principle, so that the partition area is more balanced, and the tag oscillation effect is reduced. According to the method, the black-start partition optimization model fusing new energy output uncertainty modeling and unconventional risk scene generation is designed, and the partition scheme is cooperatively solved by adopting the improved label propagation algorithm, so that the robustness and the recovery efficiency of the black-start partition are effectively improved; and rapid and stable power supply of a power system under complex disturbance can be realized.

The invention discloses a hybrid power system continuous dynamic-discrete strategy double-layer parallel simulation architecture which comprises a plurality of modules distributed in a master process and a slave process, the master process is used for simulating and solving a continuous subsystem model and controlling an overall simulation time sequence, and the slave process is used for simulating and solving a discrete subsystem model. The master process comprises a clock control module, a discrete event processing module, a continuous model grouping parallel module and a continuous state sending module, the slave process comprises a continuous state receiving module, a discrete model grouping parallel module and a discrete event sending module, and a shared memory module is set as an interaction channel of the master process and the slave process. According to the method, the simulation efficiency of the hybrid power system is effectively improved on the premise of ensuring the accuracy of a simulation time sequence through consecutive discrete subsystem parallelism and model grouping parallelism in the subsystems. The framework can be applied to hybrid power system simulation fields such as cascading failure analysis, power system stability control system checking and the like.

The invention discloses a double-fed fan subsynchronous oscillation suppression system. Comprising four control loops, namely a doubly-fed fan rotor rotating speed output feedback control loop, a doubly-fed fan stator reactive output current output feedback control loop, a doubly-fed fan grid side converter reactive output current output feedback control loop and a doubly-fed fan back-to-back converter direct current link capacitor voltage output feedback control loop. Four output variables are utilized to form four feedback control channels, and each control channel is provided with a cascade high-gain observer and an output feedback controller. According to the method, subsynchronous oscillation disturbance caused by series compensation line grid connection of the doubly-fed fan can be effectively suppressed, and the method has very high robustness on system operation working conditions and system parameters. The method can be widely applied to the field of stability control of power systems.

The present invention discloses a transient voltage stability emergency load shedding control method, system and medium for a power system, belonging to the field of power system stability control. The method includes: S1, selecting fault condition samples; S2, obtaining a first state, a first completion flag and a first reward according to the fault condition samples and the previous load shedding control measure; S3, the intelligent agent selects the current load shedding control measure in the linear decision space according to the previous load shedding control measure and simulates to obtain a second state; S4, using the first state, the first completion flag, the first reward, the current load shedding control measure and the second state, updating the policy network parameters of the intelligent agent, and taking the current load shedding control measure as the new previous load shedding control measure; S5, repeating S2-S4 until an effective load shedding control measure is obtained or a preset number of iterations is reached; S6, repeating S1-S5 until a preset number of training rounds is reached. The efficiency of formulating offline emergency load shedding control measures can be improved.

The present application discloses a measurement, identification, and control integrated fast energy control device for network-forming new energy power generation, which relates to the technical field of power system stability control. It includes a data acquisition unit, a disturbance analysis unit, and a control execution unit. The data acquisition unit acquires first operating parameters and extracts first characteristic parameters. The disturbance analysis unit analyzes the characteristic parameters to obtain disturbance information and source locations, and constructs a disturbance characteristic library. The control execution unit calculates compensation parameters, generates control strategies, forms a hierarchical coordinated control structure, and issues adjustment instructions. The present application constructs a complete closed loop from measurement to control, so as to be able to implement fast and accurate energy control for various disturbances, effectively improving the stability and anti-disturbance ability of the network-forming new energy power generation system.

The energy storage converter voltage compensation control method based on the resistance inductance type virtual impedance solves the problems of poor public coupling point voltage harmonic suppression effect and insufficient load adaptability in the prior art, and belongs to the technical field of power system stability control.The present application comprises: sampling three-phase public coupling point voltage and three-phase grid-connected current; processing the coupling point voltage to separate out the fundamental voltage and the harmonic voltage; the fundamental voltage is sent to the power calculation module to calculate the fundamental current reference value; the harmonic voltage is converted into the harmonic current reference value through the resistance inductance type virtual impedance, and the resistance inductance type virtual impedance is; the fundamental current reference value and the harmonic current reference value are superimposed to obtain the total current reference value; the error amount of the three-phase grid-connected current and the total current reference value is input into the proportional integral multi-quasi-resonant controller, and the output of the proportional integral multi-quasi-resonant controller is decoupled and modulated to generate the pulse width modulation signal used for controlling the switch tube of the energy storage converter.