计及分布式光伏承载力的配电网侧独立储能充放电策略

Charging and Discharging Strategies of Independent Energy Storage for Distribution Grid Side Considering Distributed PV Carrying Capacity

在“双碳”目标、新型电力系统加快推进下,中国分布式光伏呈现快速发展态势,在高比例分布式光伏接入地区易发生电网电压升高越限和反向潮流设备过载等问题,影响分布式光伏接入配电网承载力。充分考虑配电网侧独立储能调节作用,研究提出了提高分布式光伏接入电网承载力水平的独立储能优化配置及充放电策略。考虑了基于时序潮流和两步式迭代的配电网侧独立储能应用综合成本效益,以系统成本最小为原则,科学合理确定独立储能配置容量和充放电控制策略。选取某村低压配电网为案例,通过配电系统经济分析和优化软件(DEAP),仿真分析了所提独立储能充放电控制策略的有效性。

In the context of carbon peaking and carbon neutrality goals and new power system construction,China’s distributed photovoltaic(PV)development accelerates.Areas with a high proportion of distributed PV access are prone to grid voltage rise over the limit,reverse tide equipment overload,and other problems,affecting the distribution grid carrying capacity with the distributed PV access.This paper fully considers the regulating role of independent energy storage on the distribution grid side and proposes an optimal configuration of independent energy storage and charging/discharging strategy for improving the carrying capacity of the grid with distributed PV access.Specifically,the comprehensive cost effectiveness of the independent energy storage application of the distribution grid side based on the time-series tide and two-step iteration is considered,and the independent energy storage configuration capacity and charging/discharging control strategy are scientifically and reasonably determined based on the principle of the minimum system cost.The low-voltage distribution grid of a village is selected as a case study,and the effectiveness of the independent energy storage charging and discharging control strategy proposed in this paper is simulated and analyzed by the Distribution System Analysis and Optimization Platform(DSAP).