提升新能源电网消纳水平的混合储能系统优化控制方法

针对可再生新能源波动对接入电网冲击的问题,本文提出一种混合储能系统优化控制方法,该方法根据可再生能源预测误差随时间尺度变化的特点,采用混合储能系统多级协调控制策略,通过制定日前计划、日内计划与实时计划,实现不同时间尺度下储能系统合理运行和风电功率的精确跟踪。将所给模型转换为一个滚动线性规划问题,利用CPLEX求解器可实现求解。经过仿真算例验证,本文方法能够有效减少风电波动带来的影响,提高电网对风电消纳水平。

Optimization Control Method for Hybrid Energy Storage System to Enhance the Renewable Energy Absorption Level of Power Grid

Aimed at the problem of the impact of renewable energy fluctuations on power grid,an optimization control method for a hybrid energy storage system is proposed in the paper.This method employs a multi-stage coordinated con?trol strategy for the hybrid energy storage system based on the variation in renewable energy prediction errors with the time scale.By developing day-ahead,intra-day and real-time plans,the rational operation of the energy storage system and the accurate tracking of wind power is realized on different time scales.The proposed model is transformed into a rolling linear programming problem,which is further solved by means of a CPLEX solver.The simulation results of a nu?merical example show that the proposed method can effectively reduce the impact of wind power fluctuations and im?prove the wind power absorption level of power grid.