计及光伏出力波动的交直流混合配电网安全域模型  

Security Region of Variable Photovoltaic Generation in AC-DC Hybrid Distribution Power Networks

作　　者：裴蕾 卫志农[1] 陈胜[1] 赵景涛[2] 尹宏旭[2] PEI Lei;WEI Zhinong;CHEN Sheng;ZHAO Jingtao;YIN Hongxu(College of Energy and Electrical Engineering,Hohai University,Nanjing 211100,Jiangsu Province,China;NARI Technology Company Limited,Nanjing 211100,Jiangsu Province,China)

机构地区：[1]河海大学能源与电气学院,江苏省南京市211100 [2]国电南瑞科技股份有限公司,江苏省南京市211100

出　　处：《电网技术》2021年第10期4084-4091,共8页Power System Technology

基　　金：国家自然科学基金项目(U1966205)。

摘　　要：高比例间歇性光伏的接入给交直流配电网的安全运行带来了挑战。为定量刻画配电网对于分布式光伏波动的接纳能力,提出了交直流混合配电网中光伏出力波动空间的安全域模型。首先,计及电压约束、后备容量调节约束、馈线容量约束和关键设备出力约束,构建了交直流配电网非线性安全域模型。其次,基于交直流配电网非线性优化运行模型,采用折半求解法获得一系列安全边界点。最后,采取凸包络拟合的方法生成可观测的安全域空间。算例结果验证了凸包络拟合法的合理性,同时评估了交直流混合配电网中换流器控制方式、换流器无功补偿和系统各区域负荷增长等因素对安全域大小的影响。The high penetrations of stochastic photovoltaic(PV)generation imposes unprecedented challenges to the secure operation of the AC-DC hybrid distribution power networks.The steady-state security region of the AC/DC hybrid distribution power network is developed,which exactly measures how much uncertainty caused by PV generation that the network can mitigate.First,this security region model considers the nodal voltage constraint,the reserve capacity constraint,the feeder capacity constraint and the output constraints of production units.Second,on the basis of the nonlinear operation model of the AC-DC hybrid distribution network,a series of safety boundary points are obtained by using a systematic algorithm.Moreover,the convex hull approach is adopted to produce the dispatchable region,whose effectiveness is verified by the numerical results.Meanwhile,the impacts of the control mode of the converter,the reactive compensation amount of the converter and the increase of the load in each section on the constructed security region are investigated.

关 键 词：交直流混合配电网 安全域 光伏出力 随机性 

分 类 号：TM73[电气工程—电力系统及自动化]