基于光伏重心理论的配电网分布式光伏最大准入容量计算  

Distributed PV Hosting Capacity Calculation of Distribution Network Based on PV Barycenter Theory

作　　者：魏欣荣 吴俊勇[1] 丁然 邵尹池 王燚 张文浩 WEI Xinrong;WU Junyong;DING Ran;SHAO Yinchi;WANG Yi;ZHANG Wenhao(School of Electrical Engineering,Beijing Jiao Tong University,Haidian District,Beijing 100044,China;State Grid Jibei Electric Power Co.,Ltd.,Xicheng District,Beijing 100053,China;North China Electric Power Research Institute Co.,Ltd.,Xicheng District,Beijing 100045,China)

机构地区：[1]北京交通大学电气工程学院,北京市海淀区100044 [2]国网冀北电力有限公司,北京市西城区100053 [3]华北电力科学研究院有限责任公司,北京市西城区100045

出　　处：《电网技术》2023年第11期4533-4544,共12页Power System Technology

基　　金：华北电力科学研究院科技项目(520120200016)。

摘　　要：随着高比例分布式光伏的接入,配电网分布式光伏最大准入容量(hosting capacity,HC)的确定成为了业界关注的焦点。提出了矩和重心的概念,并通过理论分析得到光伏重心必须超前于负荷重心的全局度量指标(globalmetric,GM)。继而推导了满足节点电压越上限约束和线路载流量约束的非迭代的HC的解析表达式,分别得到了节点电压和载流量度量指标LM1、LM2,它们与GM一起构成了完整的光伏重心理论。在此基础上,提出了配电网分布式光伏最大准入容量的新算法和修正算法,修正算法能考虑已有光伏接入和可开发光伏容量等现场约束。IEEE 33算例表明,与考虑无功分布和线损的经典蒙特卡洛算法相比,所提方法在准确性较好的同时,计算效率极高、且能兼顾已有光伏接入和可开发光伏容量等实际限制,工程实用性强。With the access of the high proportional distributed PV,the hosting capacity(HC)of the distributed PV in the distribution network has become the focus of the industry.In this paper,the concepts of moment and barycenter are proposed,and through the theoretical analysis,the global metric(GM)that the PV barycenter must be set ahead of the load barycenter is obtained.Then,the analytical expression of non-iterative HC that satisfies the upper limit constraint of the node voltage and the line current carrying capacity constraint is derived.The node voltage and the current carrying capacity metrics LM1 and LM2 are obtained respectively,which,together with GM,constitute a complete PV barycenter theory.On this basis,a new algorithm and a modified algorithm for the hosting capacity of the distributed PV in the distribution network are proposed.The modified algorithm takes into account the existing PV access and the exploitable PV capacity and other on-site constraints.The IEEE33 example shows that,compared with the classical Monte Carlo algorithm considering the reactive power distribution and the line loss,the proposed method has better accuracy and higher calculation efficiency,which takes into account the practical limitations of the existing PV access and the exploitable PV capacity,having a stronger engineering practicability.

关 键 词：最大准入容量 分支结构 配电网 分布式光伏 光伏重心理论 可开发光伏容量 

分 类 号：TM721[电气工程—电力系统及自动化]