摘要
高渗透率风电的接入使得配电网三相潮流计算需要考虑更多不确定因素,传统的潮流计算方法面临严峻挑战。文中基于区间分析理论,采用区间数对风力发电系统出力的不确定性进行描述与分析,并建立了考虑风电注入功率不确定性的配电网三相区间潮流计算模型。为高效求解所建立的配电网三相区间潮流计算模型,基于对传统非线性区间方程求解方法的分析与改进,提出了采用Krawczyk-Moore算子对该区间潮流计算数学模型进行求解的方法,可以进一步提高区间运算结果的精确性。通过组态式配网动模试验搭建IEEE 37节点不平衡配电网测试系统进行仿真验证,并与现有的配电网确定性三相潮流计算方法进行对比,结果表明所提出的区间潮流计算方法能够较好地跟踪风电出力的不确定性,可为配电网调度提供系统运行状态上下界的参考。
High penetration of wind power injections makes the three-phase power flow calculation of the distribution network need to consider more uncertainties,and the traditional power flow calculation methods face severe challenges.Based on the interval analysis theory,this paper describes and analyzes the uncertainty of wind power outputs using interval numbers,and establishes a three-phase interval power flow calculation model for distribution network considering the uncertainty of wind power injections.In order to solve the established three-phase interval power flow calculation model efficiently,the method of solving the mathematical model by Krawczyk-Moore operator is proposed,based on the analysis and improvement of the traditional nonlinear interval equations,and the conservativeness of the interval results can be further reduced.The feasibility of the proposed interval power flow is verified via the modified IEEE 37-node test system which is carried out based on the established dynamic simulation experimental platform,and the simulation results show that the proposed interval power flow calculation method can better track uncertainty of wind power injections than that of the existing deterministic three-phase power flow models.It can provide a reference for the upper and lower bounds of the operating state of the system for distribution network scheduling.
作者
刘刚
王秀茹
李华
赵超
凌万水
吉小鹏
Liu Gang;Wang Xiuru;Li Hua;Zhao Chao;Ling Wanshui;Ji Xiaopeng(State Grid Suqian Power Supply Company,Suqian 223800,Jiangsu,China;Shanghai Wiscom Sunset Electric Power Technology Co.,Ltd.,Shanghai 200233,China;School of Automation,Nanjing University of Science and Technology,Nanjing 210094,China)
出处
《电测与仪表》
北大核心
2022年第2期126-132,共7页
Electrical Measurement & Instrumentation
关键词
配电网
分布式电源
风电
不确定性
潮流计算
区间分析
动模实验平台
distribution networks
distributed generation
wind power
uncertainty
power flow calculation
interval analysis
dynamic simulation experimental platform
作者简介
刘刚(1988-),男,工程师,从事智能配电网可靠性提升与主动优化控制相关技术研究。Email:741513769@qq.com;王秀茹(1978-),女,高级工程师,从事配电网运行检修及主动配电网相关技术研究。Email:741513796@qq.com;李华(1978-),男,高级工程师,从事配电网计量相关技术研究。Email:huocha@sina.com;赵超(1979-),男,高级经济师,从事配电网企业管理相关技术研究。Email:18544922@qq.com;凌万水(1975-),男,高级工程师,从事智能配电网相关技术研究。Email:lingws2010@foxmail.com;通信作者:吉小鹏(1983-),男,讲师,博士,主要研究方向为综合能源系统建模与优化控制、电力信息物理系统安全等。Emil:jixiaopeng_nj@163.com。
