METHOD FOR CONTROLLING STABLE PHOTOVOLTAIC POWER OUTPUT BASED ON ENERGY STORAGE RUNNING STATE

摘要

A method for controlling stable photovoltaic power output based on an energy storage running state, comprising: S1. selecting a research object time section window length y and running data P(t) thereof; S2. based on an optimum power output model, determining a desired output target value P_G; S3. setting the number D of particle swarm dimensions, the maximum number M_max of iterations and a convergence precision C_σ, and initializing a particle swarm position x and speed v at the same time; S4. according to a charge and discharge policy, calculating a fitness value Px_id of each particle and comparing a particle extreme value p_i thereof with a global particle extreme value p_g, if the fitness value is lower, updating p_i and p_g, and if not, updating a particle speed V_id and position X_id; and S5. calculating Δσ² and determining whether a convergence condition formula I is satisfied, if so, acquiring the optimum energy storage capacity W_o, and if not, re-releasing particles to build a new particle swarm and repeating step S4. The method can effectively suppress grid-connection power fluctuation and precisely adjust a state of charge of an energy storage system at the same time.