摘要
现有配电网安全域研究主要针对交流配电网,文中提出基于凸包络的交直流混合配电网安全域模型。首先,计及电压约束、馈线容量约束和关键设备出力约束,构建交直流配电网非线性安全域模型。其次,基于非线性规划模型求解交直流混合配电网安全边界点。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的合理性和优越性,同时评估了交直流混合配电网中换流器控制方式、换流器无功补偿量和系统电压下限等因素对安全域大小的影响。
Current research on security region of distribution networks generally focuses on AC distribution networks. This paper proposes the convex hull based security region(CHSR) model for AC/DC hybrid distribution networks. Firstly, a nonlinear security region model for AC/DC distribution networks is constructed by taking into account the voltage constraints, feeder capacity constraints and critical equipment output constraints. Secondly, the security boundary points of the AC/DC hybrid distribution network are solved based on the nonlinear programming model. Finally, the convex hull fitting approach is adopted to generate the observable security region space. The results of the example verify the rationality and superiority of the CHSR.Meanwhile, the impact of the control modes of the converters, the reactive compensation of the converters and the lower limit of the system voltage on the constructed security region are investigated.
作者
裴蕾
卫志农
陈胜
孙国强
吕思
PEI Lei;WEI Zhinong;CHEN Sheng;SUN Guoqiang;LYU Si(College of Energy and Electrical Engineering,Hohai University,Nanjing 211100,China)
出处
《电力系统自动化》
EI
CSCD
北大核心
2021年第18期45-51,共7页
Automation of Electric Power Systems
基金
国家自然科学基金资助项目(U1966205)。
关键词
交直流混合配电网
凸包络
安全域
换流器
AC/DC hybrid distribution network
convex hull
security region
converter
