摘要
当前城市电缆配电网高电压问题影响着电网安全运行和高品质供电,清洁能源刚性并网进一步加剧了这一现象。柔性并网是主动配电网的重要特征,可从有功/无功2方面共同作用调节优化电网运行。为此提出光伏和储能一体的光储系统参与主动配电网优化运行的方法,给出了光储系统的拓扑结构,并建立了光储柔性并网模型;构建了以"源-网"损耗最小为目标的主动配电网优化运行模型;针对模型中储能电量的时序连续性和光储有功/无功双决策问题,采用多维动态规划算法求解所建模型。仿真结果表明,柔性光储系统具有较强的潮流调节能力,优化方法实现了清洁能源满额消纳、配网经济运行和电压越限治理等目标。
At present, HV problem of urban cable distribution network affects safe operation and high quality power supply of power grid, exacerbated by rigid grid connection of clean energy. Flexible grid connection is an important feature of active distribution network in regulating and optimizing power grid operation from aspects of active and reactive powers. A method for integrated PV-storage system participating in active distribution network optimization is proposed. Topology of the PV-storage system is given and a PV-storage model of flexible grid connection is established. An optimal operation model of active distribution network with minimum loss of ＂source-network＂ as its goal is constructed. According to sequential continuity of energy storage capacity in model and dual decision making for active and reactive powers in PV-storage system, a multi-dimensional dynamic programming algorithm is used to solve the model. Simulation results show that the flexible PV-storage system has strong ability to regulate power flow. Meanwhile, the optimization method can achieve goals such as full accommodation of clean energy, economic operation of distribution network, and government of abnormal voltage.
出处
《电网技术》
EI
CSCD
北大核心
2017年第10期3300-3306,共7页
Power System Technology
基金
国家自然科学基金项目(51707089)
国家电网公司科技项目(5210EF17001C
521001160005)
江苏省产学研联合前瞻性项目(BY201500905)~~
关键词
光储系统
柔性并网
主动配电网
优化运行
多维动态规划
PV-storage system
flexible grid connection
active distribution network
optimal operation
multi-dimensional dynamic programming
