258 results about "Power oscillation" patented technology

The invention provides a super-computing center battery charging and discharging strategy optimization method and system based on reinforcement learning, and the method comprises the steps: obtaining a real-time operation data set of a super-computing center battery system in real time, and carrying out the load feature extraction of the real-time operation data set; the method comprises the steps of generating a load feature set of a battery system, inputting the load feature set into a pre-trained reinforcement learning strategy network, performing charge and discharge strategy priority matching processing on the load feature set, generating a priority ranking result of a target charge and discharge strategy, adjusting a current charge and discharge strategy set according to the priority ranking result, generating an optimized charge and discharge strategy set, and outputting the optimized charge and discharge strategy set. And performing charging and discharging operation based on the optimized charging and discharging strategy set, and collecting battery performance feedback data after the charging and discharging operation so as to iteratively update strategy matching parameters of the reinforcement learning strategy network. According to the method, the problems of over-charging and over-discharging and power oscillation caused by lagging response of environmental parameters in a traditional fixed strategy are solved, and autonomous decision-making of multi-target optimization can be realized without depending on artificial experience rules.

The invention relates to the technical field of photovoltaic energy storage systems, and discloses a power regulation method, device and equipment for a photovoltaic energy storage system and a storage medium, and the method comprises the steps: carrying out the real-time collection and wavelet decomposition of voltage and current parameters of a photovoltaic array, and obtaining power fluctuation components and power trigger signals of different frequencies; executing power vector analysis to obtain an oscillation mode characteristic parameter set and an oscillation suppression strategy; constructing a photovoltaic side feedforward trigger channel and an energy storage side feedback trigger channel, and obtaining a coordination trigger instruction of the photovoltaic side and the energy storage side; and performing multi-objective optimization decomposition and slope limitation processing on the coordination triggering instruction to obtain a voltage reference value of the photovoltaic MPPT controller and a current reference value of the battery charging and discharging controller, thereby realizing accurate identification and prediction of different frequency power fluctuation components, realizing collaborative cooperation of photovoltaic side feed-forward and energy storage side feedback, and improving the reliability of the system. And the power oscillation risk caused by control mode switching is avoided.

The invention relates to a charging pile AC / DC power dynamic cooperative regulation and control system, which belongs to the technical field of charging piles and comprises a power grid parameter acquisition module, a charging load characteristic analysis module, a coupling effect calculation module, a power distribution optimization module and a cooperative control execution module. The system can accurately distribute power to vehicles which really need and can be efficiently utilized, mutual interference between modules can be effectively restrained, power oscillation and cascading failures are avoided, the stability and reliability of the whole charging station under high-density operation are guaranteed, the robustness of the system is enhanced, and the service life of the charging station is prolonged. A dynamic and globally optimal balance point is found and maintained among three mutually restricted targets, namely, power deviation, coupling power and power grid constraint, by establishing and solving a multi-target optimization model containing power deviation, coupling power and power grid constraint, the stability of the multi-target optimization model is guaranteed, and the power grid safety is maintained, which cannot be achieved by any single-target or static-weight control strategy.

The invention discloses a laser wireless energy transfer dynamic MPPT control method based on an RL-PSO hybrid algorithm and a reconfigurable array system, and aims to solve the problems of power oscillation and mismatch loss caused by light spot offset of a photovoltaic array under laser dynamic irradiation. According to the method, reinforcement learning (RL) and particle swarm optimization (PSO) are fused, dynamic parameters such as the light spot moving speed and irradiance are sensed in real time through the RL, the inertia weight and learning factors of the PSO are adjusted in a self-adaptive mode, and collaborative optimization of global search and local tracking is achieved. According to the system level, a reconfigurable photovoltaic array is designed, and according to data of a light spot position sensor, battery series-parallel topology is dynamically adjusted through a switch matrix, and current matching is optimized. According to the method, double-loop control is adopted, wherein an outer-layer RL decision module dynamically switches PSO working modes according to the environment, and an inner-layer PSO module optimizes the working voltage. The system efficiency in a dynamic scene can be improved by 15%-30%, mismatch loss is reduced by 40% or above, and the method is suitable for unsteady-state energy supply scenes such as unmanned aerial vehicles and mobile robots.

The invention relates to the technical field of virtual impedance self-adaptive control of energy storage converters, in particular to a virtual impedance self-adaptive control method of a grid-forming type energy storage converter, which comprises the following steps of: acquiring three-phase voltage and current of a grid-connected point in real time; performing phase-locked loop processing and coordinate transformation to obtain a d-axis voltage, a q-axis voltage and a current under a synchronous rotating coordinate system; calculating instantaneous power, and obtaining active power and reactive power; virtual resistance and virtual inductance are calculated according to power fluctuation through an adaptive algorithm; the virtual impedance equation generates a voltage drop compensation signal; and superposing the compensation signal and the reference voltage to generate a new modulation wave, and inputting the new modulation wave into the pulse width modulation module to realize power oscillation suppression and stable operation. According to the method, the problems between damping enhancement and loss reduction in network construction type control are solved, the dynamic and steady-state performance of the converter is improved, and a key technical support is provided for large-scale and high-reliability application of the network construction type energy storage converter in a novel power system.

The invention discloses a power oscillation suppression method and a power oscillation suppression system for a multi-construction-network type converter parallel system, which relate to the technical field of converter control and comprise the following steps of: acquiring voltage, current and voltage frequency output by a three-phase converter at a grid-connected point in the multi-construction-network type converter parallel system; calculating active power and reactive power and inputting the active power and the reactive power into the virtual oscillator; according to the voltage frequency and the rated frequency, system power reference compensation is obtained through an introduced proportional differential controller, then the active power and an active power reference value are combined, frequency deviation is obtained through an active droop link of a virtual oscillator, and then a voltage phase angle is obtained through calculation; meanwhile, the reactive power is subjected to a reactive power control link of the virtual oscillator to obtain a voltage amplitude; and calculating a system reference voltage according to the voltage amplitude and the voltage phase angle, and performing real-time adjustment on the output of the three-phase converter through voltage and current double-closed-loop adjustment and PWM (Pulse Width Modulation) control so as to suppress the frequency oscillation of the system.

The invention discloses a control method of a current source type multi-terminal direct current power transmission system, and relates to the technical field of electronic power control. In the current source type multi-terminal direct current power transmission system, a converter station at a rectification side is an LCC converter station, and a converter station at an inversion side comprises at least two CLCC converter stations which are connected in parallel; the method comprises the following steps: a converter station at a rectification side adopts constant current control and constant minimum firing angle control; and the converter station at the inverter side adopts master-slave control. According to the method, the problem of commutation failure can be avoided, the problem of power reverse transmission due to power oscillation and loss caused by fault commutation failure of a current source type multi-terminal direct current system can be avoided, and the problems of low MMC voltage level and power capacity and high price can be avoided.

The invention relates to the technical field of energy storage systems, in particular to a symmetric / asymmetric fault ride-through control method for a network-forming type energy storage converter, which comprises the following steps of fault detection and classification, adaptive control target decision and multi-mode unified control. According to the method, adaptive and intelligent fault ride-through is realized, the control accuracy and efficiency are improved, the adaptability and robustness of the energy storage system in different power grid fault scenes are enhanced, the center of gravity is dynamically adjusted and controlled according to the charge state of the energy storage system or the received power grid dispatching instruction, the maximum utilization of system resources is realized, and the power grid fault ride-through efficiency is improved. The voltage and frequency support is provided for the power grid, the response speed is far higher than that of traditional deviation adjustment, the voltage support effect at the moment of a fault is greatly improved, sudden change of power and current is effectively prevented, secondary impact on the recovered power grid caused by off-grid of the converter or power oscillation is avoided, and the friendliness of network forming equipment is embodied.

The invention provides a virtual inertia adaptive control method, device and system, and relates to the technical field of inverter system control. The method comprises the following steps: calculating a reference current value according to a power reference value and an actual output voltage; calculating a current deviation value according to the reference current value and the actual output current value; outputting the current deviation value to an adaptive resonance controller to obtain a compensation control voltage signal; inputting the compensation control signal to an AHO virtual oscillator to obtain a reference value of the output voltage of the inverter; and controlling the output of the three-phase inverter circuit according to the reference value of the inverter output voltage. Wherein the adaptive resonance controller carries out adaptive control through the proportional parameter and the proportional resonance inertial parameter. The virtual inertia output can be dynamically adjusted according to the real-time requirement of the system, the overshoot phenomenon caused by power oscillation is effectively suppressed while the frequency stability is met, and the capacity of the system for resisting sudden load change and frequency disturbance is enhanced.

The invention provides a method for suppressing low-frequency power oscillation of a multi-machine interconnection system. The direct suppression of the low-frequency power oscillation of the multi-machine interconnection system is realized by detecting the interaction power parameters among the grid-forming inverters in real time and superposing the differential signals of the interaction power parameters to the power control loop through the preset feedback gain coefficient. And by dynamically adjusting the equivalent system damping coefficient, the dynamic stability of the parallel inverter system is remarkably improved. Compared with a traditional method depending on a fixed damping coefficient or indirect current control, the method does not need a communication cooperation mechanism, and can achieve the quick attenuation of the power oscillation mode only based on a local signal. Meanwhile, the introduction of a differential feedback mechanism can accurately capture the dynamic change trend of power interaction, avoids the oscillation divergence risk caused by the sudden change of line impedance or load, and improves the robustness in a weak power grid and other scenes.

The invention discloses an active and reactive comprehensive oscillation quantity minimization cooperative control method under a current constraint condition, and the method comprises the steps: analyzing an inverter side current converter in a power grid voltage imbalance state, and quantifying the frequency doubling fluctuation quantity of active power and reactive power caused by a negative sequence component; a third harmonic voltage compensation method is adopted to suppress negative sequence current, the third harmonic voltage compensation amount of the converter is dynamically adjusted, and three-phase current balance is regulated and controlled; on the basis of active and reactive power fluctuation suppression of a negative-sequence current compensation method, an optimization function with the purpose of minimizing the comprehensive fluctuation quantity of active power and reactive power is constructed by utilizing controllable negative-sequence current compensation quantity and eliminating frequency doubling fluctuation quantity of active power and reactive power, and an optimal negative-sequence current compensation scheme is solved in real time by adopting a particle swarm optimization algorithm. Cooperative suppression of three-phase current balance and power oscillation is achieved, and the operation stability and the power transmission capacity of the inverter side converter under an asymmetric fault are remarkably improved under the current amplitude limiting condition.

The invention relates to a new energy power generation technology, and aims to provide an active power decoupling method for introducing a three-phase voltage unbalance degree. Comprising the steps that voltage and current double-loop control is adopted for a three-phase energy storage converter of the T-type three-level topology; detecting a three-phase instantaneous voltage of the output side of the converter to obtain a three-phase voltage amplitude unbalance degree; pre-judging the unbalance degree of the voltage amplitude of the power grid, and continuing to execute if a preset condition is met; the three-phase voltage amplitude unbalance degree is introduced into three-phase power grid voltage dq conversion and calculation of a three-phase current feedback loop, and finally a PWM control signal is generated; and each switching tube in the converter executes actions based on the PWM control signal, so that the three-phase power is kept equal, and the frequency doubling power ripple is suppressed. According to the invention, frequency doubling ripple power oscillation under the working condition of unbalanced three-phase power grid voltage amplitude can be effectively eliminated, and the suppression target of DC side frequency doubling power ripples is realized; no additional hardware topology is added, an original control ring is reserved, and detection and control of positive and negative sequence components are omitted.

The invention provides a virtual synchronous machine grid-connected control method and device and a readable storage medium, and relates to the technical field of electric power. The method comprises the following steps: calculating grid-connected active power and actual reactive power according to inverter parameters and power grid parameters of previous grid-connected control; determining the output voltage of the inverter according to the actual reactive power and the reference reactive power; inputting the grid-connected active power, the reference active power and the rated angular frequency into a first-order low-pass filtering module to obtain a frequency deviation and a frequency change rate, and adaptively adjusting the virtual inertia according to the power difference and the frequency deviation; updating the output angular frequency of the inverter according to the sum of the frequency deviation and the rated angular frequency; and performing voltage and current double-closed-loop control on the output voltage and the output angular frequency to obtain a modulated wave signal, and performing sine pulse width modulation based on the modulated wave signal to obtain a switching control signal of the inverter. Therefore, the active power oscillation is eliminated, the active steady-state deviation is reduced, and the frequency deviation and the frequency change rate are effectively inhibited.

The invention relates to an electric energy coordinated distribution system capable of quickly clearing faults of a power distribution network, which belongs to the technical field of power system protection and control, and comprises the following steps: generating a regional reference impedance matrix in advance based on power grid static topological data and load flow calculation; the system comprises an instantaneous feature analysis module, an evolution trend analysis module, a system stability evaluation module, a collaborative response evaluation module, a fault type judgment module and a response strategy generation module, the fault recognition time is shortened, improvement is carried out compared with a traditional method, the collaborative response precision of the distributed power supply is improved, and the system reliability is improved. The power oscillation risk is reduced, the transient stability margin of the system is improved, and the anti-disturbance capability is enhanced; the fault power failure time is reduced, the distributed energy utilization rate is improved, the new energy consumption space is increased, and the updating period of traditional protection equipment is delayed.

The present invention discloses an optimized control strategy for the transient characteristics of a distributed generation system, including the following control structures: an output power measurement unit, a parameter controller, a voltage regulation controller, a primary frequency modulation controller, an output power response optimization controller, and SPWM modulation. The distributed generation system realizes functions such as output power monitoring, operating parameter setting, voltage control, primary frequency modulation, inertia and damping simulation, rapid oscillation suppression, and inverter shutdown control through the above control structures. The present invention will solve the problem that when a grid-connected inverter is connected to the end of the power grid, it is vulnerable to frequency fluctuations and generates serious power oscillations, and can effectively optimize the transient response of the system to grid connection and achieve rapid suppression of output oscillations.

The invention provides a thermal power generating unit power oscillation on-line monitoring system, and relates to the technical field of monitoring, an output power sequence, a frequency sequence, an operation parameter set and a control instruction set are acquired through a data acquisition module, and a data processing module performs denoising, abnormal value elimination, time alignment and resampling on an original data set to generate a processed data set; the oscillation analysis module calculates an oscillation characteristic index based on the processing data set and generates an oscillation judgment result; the early warning module outputs an early warning signal when determining that power oscillation exists; the linkage control module generates a control instruction after receiving the early warning signal, and cuts off a frequency modulation action loop or adjusts frequency modulation related parameters; and the data storage module is used for carrying out structured storage on the processing data set, the oscillation characteristic indexes, the oscillation judgment result, the early warning signal and the control instruction. Therefore, real-time monitoring, accurate identification and rapid linkage control of power oscillation of the thermal power generating unit can be realized, and the operation stability of the unit and the safety of a power grid are improved.

The invention discloses a power feedback and phase compensation-based oscillation suppression strategy for a multi-configuration-network converter grid-connected system. The multi-configuration-network converter grid-connected system mainly comprises the following modules: a power calculation module, a virtual speed regulator module, a virtual rotor module, a reactive power-voltage droop control module and a voltage and current double-closed-loop module. In the virtual rotor module, the output active power and the output power angle are subjected to a differential link to construct a power feedback loop, the difference value between the output angular frequency of the virtual rotor and the rated power grid frequency is used as the phase compensation amount, and a power feedback and phase compensation strategy is applied; the problem that after grid connection, a multi-grid converter is prone to being disturbed by the power grid frequency to generate violent power oscillation is solved.

The invention discloses a power oscillation suppression method and system for a network-forming type diesel-storage combined power supply system, and the method comprises the steps: introducing the instantaneous active power of a diesel generator and an energy storage converter into an instantaneous power interleaving feedback compensation branch, calculating to obtain the power angle compensation amount of the energy storage converter, and carrying out the real-time adjustment of the output phase of the energy storage converter, therefore, the phase deviation between the energy storage converter and the diesel generator is reduced, the purpose of suppressing the power oscillation of the network-forming type diesel-storage combined power supply system is achieved, and the cooperative power supply capability of the network-forming type diesel-storage combined power supply system under the dynamic working condition is remarkably improved.

The invention belongs to the technical field of power system control, and discloses a direct-drive fan asymmetric fault ride-through control method and system based on negative sequence impedance, and the system comprises a phase-locked loop module PLL which achieves the separation of positive and negative sequence fundamental wave components and has a good dynamic response speed; the dynamic supporting point motion calculation module distributes positive and negative sequence reactive current and a boundary autonomous moving point strategy BAMP based on a fixed proportion of voltage change through a fixed positive and negative sequence proportion strategy FRPN; the maximum support point tracking module ensures that two constraints of peak current limit PCL and active power oscillation limit POL can be met; the selector module is used for switching the system from a normal operation mode to a support mode after fault detection, and activating the DSPM and MSPT modules; and the admittance current control module ACC receives the reference value of the negative sequence simulation admittance and obtains the reference value of the negative sequence current. The energy efficiency and stability of the whole system are improved, and the practical application value of the method is verified.

The invention discloses a turbine generator set power oscillation emergency valve switching control method, system, equipment and medium based on a thermodynamic model, and belongs to the technical field of electric power system automation control and thermal energy power engineering, and the method comprises the steps: monitoring the operation state of a set in real time, and collecting the current data of the set; calculating a theoretical balance valve position required for maintaining the current target power in real time by using the corrected inverse thermodynamic model; and the power fluctuation condition is monitored in real time, when it is detected that power oscillation happens to a unit and valve cutting logic is triggered, the system intercepts a conventional feedback instruction for tracking the actual valve position, the theoretical balance valve position is directly used as a target instruction, and a control valve is forcibly driven to act to the valve position through a rate limiter. According to the method, it can be ensured that after closed-loop control of the unit is cut off, the valve rapidly returns to the physical balance opening degree matched with the current load, an oscillation source is effectively eliminated, severe fluctuation of main steam pressure and temperature is stabilized, and the safety and stability of the unit under the abnormal working condition are remarkably improved.

The invention discloses a heterogeneous wind power plant power control method and system based on a hierarchical neural network. The method comprises the following steps: S1, acquiring heterogeneous wind turbine generator parameters; s2, establishing a heterogeneous wind power plant state space model according to the heterogeneous wind turbine generator parameters; s3, establishing a heterogeneous wind power plant prediction model based on a time domain convolutional network-self-attention mechanism hierarchical neural network, training the heterogeneous wind power plant prediction model through a training set constructed by heterogeneous wind turbine generator parameters, and outputting a model compensation amount to correct a heterogeneous wind power plant state space model; and S4, by taking minimization of voltage and power fluctuation of the heterogeneous wind power plant as a dual control target, on the basis of the corrected heterogeneous wind power plant state space model, through a time sequence optimization heterogeneous wind power plant power instruction, realizing dual suppression of voltage and power fluctuation. The method has the advantages of improving power prediction precision, suppressing voltage fluctuation and power oscillation and the like.

The invention relates to an anti-countercurrent device suitable for a miniature grid-connected inverter system, which is characterized in that an anti-countercurrent electric meter and at least one miniature grid-connected inverter form a local area network through a local router to form a system, and the anti-countercurrent electric meter accurately acquires power grid parameters through a power grid voltage sampling terminal and a current measurement signal input terminal of the anti-countercurrent electric meter; and the real-time grid-connected power of each micro grid-connected inverter is inquired regularly as a control center, a power adjustment instruction is calculated and broadcasted, and finally all the micro grid-connected inverters are driven to adjust output synchronously. An anti-countercurrent electric meter is used as a unified control core, and a unified power adjustment instruction is calculated based on real-time countercurrent power and total generated power, so that all micro inverters can adjust power synchronously and proportionally, accurate cooperative control of multiple micro inverters is realized, and power oscillation is avoided; the whole control closed loop operates in a high-speed local area network, is quick in response, meets the grid-connected standard requirement for eliminating countercurrent, and effectively guarantees the safe operation of a power grid.

The application discloses a power oscillation data processing method and device, a storage medium and an electronic device. The method comprises the following steps: determining a plurality of sites, and determining oscillation data corresponding to the plurality of sites respectively; inputting the oscillation data corresponding to the plurality of sites respectively into a target knowledge graph representation learning model to obtain a target knowledge graph representing the relationship between the plurality of sites; and determining an oscillation propagation path of a target oscillation anomaly included in the oscillation anomaly corresponding to the plurality of sites respectively based on the oscillation data corresponding to the plurality of sites respectively. The application solves the technical problem of lacking the ability of monitoring information analysis and display for wideband oscillation in the related art.

The application discloses a kind of based on real-time demand analysis's energy storage power station state evaluation method and system, it is related to power station state evaluation technical field, comprising: obtaining the real-time operation data of energy storage power station;Real-time operation data includes voltage data, current data, temperature data and power data;Based on real-time operation data, establish the real-time evaluation index system of energy storage power station under power grid system demand;Based on the real-time evaluation index system of energy storage power station, establish the performance comprehensive evaluation model of energy storage power station, and the state of energy storage power station is evaluated according to the performance comprehensive evaluation model of energy storage power station.The application obtains operation data from PCS converter, battery body and PCC point multidimension, combined with the systematic evaluation index system of four kinds of demands of power grid frequency modulation, peak regulation, voltage regulation and power oscillation suppression, using dynamic fuzzy comprehensive evaluation and adaptive weight dynamic adjustment combined evaluation method, the overall accurate evaluation of the state of energy storage power station is realized.

The present application belongs to the technical field of new energy network construction type converter, and particularly relates to an asymmetric damping voltage controller for a network construction type converter and a control method thereof, comprising the following steps: step 1: obtaining the inductance current of a filter and the capacitance voltage in the current system; step 2: a power calculation module calculates active power and reactive power; step 3: an active control loop and a reactive control loop obtain the active power and the reactive power; the phase angle generated by the active loop control and the reference value of the inverter output voltage amplitude are calculated; step 4: the asymmetric damping voltage controller obtains the phase angle, the reference value of the inverter output voltage amplitude and the capacitance voltage; and the asymmetric damping voltage controller is used to suppress power oscillation to generate an output current reference value; and a current controller is used to generate a modulation voltage signal. The present application provides an effective technical means for improving the stability and dynamic performance of power electronic equipment in a high penetration rate new energy scene.

The invention discloses a control method and device for suppressing active oscillation of an SG-VSG parallel system, electronic equipment and a storage medium. The method comprises the following steps: adjusting terminal voltage of an SG according to an SG power reference value and excitation voltage; inputting the reactive power of the VSG into a reactive power-voltage droop control module to obtain the voltage amplitude of the VSG; inputting the VSG power reference value and the active power of the VSG into a swing equation module, and outputting a phase angle of the VSG; the phase angle of the VSG and the voltage amplitude of the VSG are input into a voltage and current double-closed-loop module, and modulation reference voltage of the VSG is output; and inputting the modulation reference voltage of the VSG into a PWM modulation module to generate a switching signal, and controlling the opening and closing of an IGBT in the fan inverter to realize the adjustment of the voltage phase angle of the VSG. An output power high-frequency component is introduced into a VSG control structure, so that power fluctuation is reduced, the power angle response speed of the VSG and the power angle response speed of the SG tend to be consistent, and therefore power oscillation suppression is effectively achieved.

The invention discloses a converter control method for improving the power transmission stability of a flexible direct current interconnection system, relates to the technical field of flexible interconnection system control strategies, and solves the problem of power oscillation existing in an existing flexible direct current interconnection device control method. According to the technical scheme, the method is characterized in that converter control modes on the two sides of the flexible interconnection system are adaptively switched according to the system energy flow direction. The technology is realized by coordinating control links such as direct-current voltage, a power control outer loop, an amplitude limiter and a current control inner loop, and a power control current feedback instruction passing through the amplitude limiter and a direct-current voltage control current feedback instruction are superposed to serve as a current inner loop control instruction; the operation of the power electronic converter is controlled through a current inner loop controller and a PWM modulation instruction; inner loop current instruction values of the converters on the two sides of the flexible direct current interconnection system are adaptively adjusted along with the change of the power flow direction of the system, direct current voltage can be controlled, the power flow direction of the system can also be controlled, and the single-side converter control mode is not limited to constant direct current voltage control or constant power control. When the power of the system changes, on the premise of ensuring reliable and stable switching of the control modes of the converters on the two sides in the system, the system stability problem caused by the power flow direction problem under the fixed control mode of the single-side converter is solved.

The invention discloses an instantaneous power distribution method and device of an isomorphic energy storage converter, terminal equipment and a storage medium, and belongs to the technical field of energy storage converter power distribution.The method comprises the steps that the energy storage output current, the energy storage output voltage, the energy storage input current and the output voltage instruction value of the isomorphic energy storage converter to be distributed are obtained; further calculating to obtain a first output current, a first correction current reference and a second correction current reference; performing gain amplification and difference suppression to obtain a third correction current reference; performing current outer loop control to obtain a phase shift angle of the isomorphic energy storage converter; and finally, performing on-off control on the isomorphic energy storage converter through the phase shift angle to obtain the instantaneous distribution power of the isomorphic energy storage converter. According to the invention, the problem that the continuous power oscillation of the isomorphic energy storage converter is caused because the same instantaneous power distribution cannot be carried out in the prior art can be solved.

The present application relates to photovoltaic and energy storage collaborative control technical field, especially to be applied to 5G integrated power supply photovoltaic control adjustment method and system, the present application proposes the following scheme, the photovoltaic characteristic parameter and corresponding time mark data are collected, three-dimensional curved surface model is constructed to carry out differential geometry curvature analysis, according to the curvature analysis result, the light change event type is determined and the photovoltaic maximum power point is positioned, according to the photovoltaic maximum power point, the photovoltaic output parameter adjustment and energy storage charging and discharging strategy is generated, the present application realizes the quick response to the quick fluctuation of light through the fusion of multidimensional characteristic parameters, adopts the positioning strategy of event-driven, improves the maximum power point tracking accuracy and dynamic stability, reduces power oscillation and energy loss, realizes the collaborative optimization of photovoltaic, energy storage and load.

The application discloses a power fluctuation smoothing control method and system for photovoltaic power station cluster, and particularly relates to the technical field of power system control, and is used for solving the power oscillation and instability problem caused by the existing smoothing control method due to neglecting the internal power grid dynamic characteristics of the cluster; by acquiring historical power flow and historical smoothing control instructions, the information transmission entropy distribution between the instructions and the flow under different frequencies is analyzed to identify the dominant oscillation mode frequency, the nonlinear interaction strength of the smoothing control loop of each substation is evaluated, and the time and space distribution inertia center of the node oscillation energy is calculated, the system dynamic instability criterion is constructed based on the nonlinear interaction strength and the inertia center offset trajectory, the dynamic safety constraint set with the target of inhibiting the oscillation mode is constructed when the criterion is established, and the smoothing control instruction optimization model is solved under the constraint set restriction to generate and execute new control instructions to each substation.