电池储能系统辅助电网调频控制策略研究

RESEARCH ON FREQUENCY MODULATION CONTROL STRATEGY OF AUXILIARY POWER GRID IN BATTERY ENERGY STORAGE SYSTEM

伴随中国新能源迅猛发展所导致电网频率波动等问题,电池储能广泛应用于辅助传统机组参与调频服务。该文首先梳理中国现有储能相关政策及相关文献,总结储能辅助调频市场环境演变规律,然后,重点分析传统机组调频及电池储能系统参与一次调频的原理过程,详细比对虚拟下垂控制与虚拟惯性控制策略的差异性特点;电池储能系统参与二次调频进行深度剖析,并对阶段功率分配作出详尽分析,同时提出考虑多约束条件的控制策略模型,为储能电站参与调频出力提供有效参考依据。最后,针对储能系统的未来发展提出建设性意见,并对下一步的研究方向做出展望。

With the rapid development of new energy in China,the frequency fluctuation of power grid and other problems are caused.Battery energy storage is widely used to assist traditional units to participate in frequency modulation services.Firstly,this paper combs the existing energy storage related policies and relevant literature in China,and summarizes the evolution law of energy storage assisted frequency modulation market environment.Then in the first part of the article,it focuses on the principle process of traditional unit frequency modulation and battery energy storage system participating in primary frequency modulation,and compares the differences between virtual droop control and virtual inertia control strategy in detail;In the second part,the battery energy storage system participating in secondary frequency modulation is deeply analyzed,and the stage power distribution is analyzed in detail.At the same time,a control strategy model considering multiple constraints is proposed,which provides an effective reference basis for the energy storage power station participating in frequency modulation output.Finally,constructive suggestions are put forward for the future development of energy storage system,and the next research direction is prospected.