高渗透率光伏配电网中电池储能系统综合运行控制策略  

Integrated Control Strategy for Battery Energy Storage Systems in Distribution Networks with High Photovoltaic Penetration

作　　者：李佳琪 陈健[1] 张文[1] 张逸成 鲍冠南 Li Jiaqi;Chen Jian;Zhang Wen;Zhang Yicheng;Bao Guannan(School of Electrical Engineering Shandong University Jinan 250061 China;School of Electrical and Electronic Engineering Nanyang Technological University 639798 Singapore;State Grid Shandong Electric Power Dispatching & Control Center Jinan 250001 China)

机构地区：[1]山东大学电气工程学院,济南250061 [2]南洋理工大学电气与电子工程学院,新加坡6397983 [3]国网山东电力调度控制中心,济南250001

出　　处：《电工技术学报》2019年第2期437-446,共10页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金资助项目(51507094)

摘　　要：为解决配电网中高渗透率光伏及用电高峰负荷过重带来的电压越限问题,并在分时电价政策下通过低储高发获取经济收益以降低储能作为电压控制手段的成本,提出一种电池储能系统综合运行控制策略。该策略包括电压控制和套利运作两部分,其中电压控制部分以防止电压越限为目标,建立包括电池剩余寿命(TOU)、荷电状态(SOC)、电压灵敏度特性、电池动作费用等在内的评价矩阵,选择综合评价指标最大者进行控制,以提高电压控制效率;套利运作部分以保证电压安全为前提,结合用电峰谷电价,尽量减少电池动作对节点电压的影响,选择电压灵敏度因数及动作费用最小、电池状态最优者进行控制。该方法在实现削峰填谷,改善配网电压安全,提高储能安装用户收益的同时,兼顾电池储能系统的状态变化,实现了功率在各储能单元间的合理分配,提高了动作效率,均衡了各储能单元的使用率,延长了整个储能系统的使用寿命。最后通过算例分析验证了该控制方法的有效性。In order to solve the voltage violation problems caused by the high photovoltaic penetration or high load profile as well as to reduce the cost of energy storage as a means of voltage control by obtaining economic benefits under the time-of-use(TOU)tariff,an integrated control strategy for battery energy storage systems in distribution networks is presented in this paper.The proposed strategy involves two parts,i.e.,the voltage control strategy and the arbitrage operation strategy.The voltage control aims at solving the voltage violation problems,and builds the evaluation matrix considering the lifetime,state of charge(SOC),voltage sensitivity and the operating costs.The battery unit with the maximum comprehensive evaluation index will be selected to improve the efficiency of voltage control.On the premise of voltage security,the arbitrage operation part utilizes the TOU tariff and minimizes the impact of battery status change on the node voltage.The battery unit with the minimal voltage sensitivity factor,the minimal operating cost and the best SOC will be selected to control with this strategy.The proposed method can achieve peak load shifting,improve the voltage security of the distribution network,and enhance the economic profits of the users.Meanwhile,it can also balance the utilization of the battery unit and extend the lifetime of the entire energy storage system.Case studies show the effectiveness of the proposed methodology.

关 键 词：配电网 光伏发 电电池储能系统 电压控制 低储高发套利 

分 类 号：TM734[电气工程—电力系统及自动化]