主动配电网灵活孤岛划分与实时调度策略  

Flexible Islanding Partition and Real-time Scheduling Strategy for Active Distribution Network

作　　者：庞凯元 王崇宇 文福拴[1] 薛禹胜 Pang Kaiyuan;Wang Chongyu;Wen Fushuan;Xue Yusheng(College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China;NARI Group Corporation(State Grid Electric Power Research Institute),Nanjing 211106,China;State Key Laboratory of Smart Grid Protection and Control,Nanjing 211106,China)

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027 [2]南瑞集团有限公司(国网电力科学研究院有限公司),江苏省南京市211106 [3]智能电网保护和运行控制国家重点实验室,江苏省南京市211106

出　　处：《电力系统自动化》2022年第22期13-24,共12页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(U1910216);南瑞集团有限公司科技项目“信息-物理-社会元素的交互及协调技术”。

摘　　要：随着风电、光伏等间歇性可再生能源发电在主动配电网(ADN)中越来越广泛的接入,其发电出力的间歇性和不确定性给ADN的安全与经济运行、故障后的恢复等提出了新的问题甚至挑战。针对ADN发生故障后的运行与恢复,提出一种灵活孤岛划分与实时调度策略。首先,建立基于环路消除辐射状约束的ADN孤岛划分模型。其次,基于小型水电站、燃气电站、储能系统、风电场与光伏电站的出力模型,考虑交流潮流与稳态安全约束,构建配电孤岛实时运行的滚动优化模型。然后,针对间歇性可再生能源发电,提出一种计及预测误差的有功出力控制策略,以确保配电孤岛的运行策略在风光发电有功出力预测有明显误差时仍然可行。最后,采用含分布式电源的改进的IEEE 33节点配电系统对所提方法的可行性与有效性进行验证。算例结果表明,所提ADN孤岛划分与实时调度策略能有效平衡配电孤岛内间歇性电源的出力波动,并可在相当程度内耐受风光出力预测误差,且具有较高的求解效率,有利于实现ADN恢复的在线决策。With the ever-increasing integration of intermittent renewable energy power generation such as wind and photovoltaic power in an active distribution network(ADN), the intermittency and uncertainty of power generation output bring new problems and even challenges to the safe and economic operation and the recovery after the failure of ADN. For the operation and recovery after failure in ADN, the flexible islanding partition and real-time scheduling strategy are proposed. First, an islanding partition model for an ADN based on the loop-elimination radiality constraint is developed. Secondly, based on the output models of small hydropower plants, gas power plants, energy storage systems, wind farms and photovoltaic power plants, a rolling optimization model for real-time operation of distribution islands is formulated considering AC power flow and steady-state safety constraints.Then, an active power output control strategy considering forecasting errors is proposed for the intermittent renewable energy power generation to ensure the feasibility of the operation strategy of distribution islands when there is a significant error for forecasting active power outputs of wind and photovoltaic generation. Finally, the feasibility and effectiveness of the proposed method are demonstrated by an improved IEEE 33-bus distribution system with distributed generators. The case results indicate that the proposed islanding partition and real-time scheduling strategy for an ADN can effectively balance the output fluctuation of the intermittent power supply in the distribution island, and can withstand the wind and photovoltaic output forecasting error to a certain extent. It also has high solution efficiency, which is beneficial for realizing the online decision of ADN recovery.

关 键 词：主动配电网 孤岛划分 实时调度策略 孤岛运行 分布式电源 预测误差 

分 类 号：TM73[电气工程—电力系统及自动化]