针对风电并网波动性强、电能质量不佳以及电-氢混合储能容量配置不佳的问题,提出一种计及风电平抑下的电-氢混合储能容量优化配置研究。在风电典型场景下,首先采用基于鲸鱼算法优化的变分模态分解对风电信号进行处理,并结合风电并网波动量限值,得到直接并网分量与储能待平抑分量;其次,在充分考虑氢储能和电化学储能的相关特性与约束条件下,制定基于碱性电解槽实际运行特性与电化学储能实际运行状态的能量管理策略,基于此策略,在消纳储能待平抑分量的同时,以系统年综合成本最小为目标,建立电-氢混合储能容量配置模型,并采用CPLEX求解器求解。仿真结果表明：所提策略不仅能提高氢储能的利用率而且还能使电化学储能工作于安全工作区间;其次,该策略下的容量配置方案可在满足系统经济性的情况下,实现对风电更好地平抑。
Abstract
Aiming at the problems of high wind power grid-connection volatility, poor power quality and poor electricity-hydrogen hybrid energy storage capacity allocation, a study on the optimal allocation of electricity-hydrogen hybrid energy storage capacity under wind power smoothing is proposed. Under the typical scenario of wind power, firstly, a variational modal decomposition based on whale algorithm optimization is used to process the wind signal, and combined with the limit value of wind power grid fluctuation, the direct grid connection component and the energy storage to be suppressed component are obtained. Secondly, an energy management strategy based on the actual operating characteristics of alkaline electrolyzers and the actual operating state of electrochemical storage is formulated with full consideration of the characteristics and constraints of hydrogen and electrochemical storage. Based on this strategy, the hybrid electricity-hydrogen storage capacity allocation model is established with the goal of minimizing the annual comprehensive cost of the system while absorbing the energy storage to be levelled off component and solved by the CPLEX solver. The simulation results show that the proposed strategy not only improves the utilization rate of hydrogen storage but also keeps the electrochemical storage in the safe operating range; and that, the capacity allocation scheme under the strategy can achieve better suppression of wind power while meeting the system economics.
关键词
风电平抑 /
变分模态分解 /
电-氢混合储能 /
碱性电解槽 /
功率分配 /
容量配置
Key words
wind power smoothing /
variational modal decomposition /
electricity-hydrogen hybrid energy storage /
alkaline electrolyzer /
power ditribution /
capacity configuration
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基金
国家自然科学基金面上项目（52277211）; 北京市大学生创新创业训练计划（10805136024XN139-35）
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