基于有效约束识别的电网热稳边界辨识方法  

Identification method of a power grid thermal stability boundary based on effective constraint identification

作　　者：徐渊 谌艳红 王凯 段志远 鲍威[2] 胡婧雯 胡通华 XU Yuan;CHEN Yanhong;WANG Kai;DUAN Zhiyuan;BAO Wei;HU Jingwen;HU Tonghua(State Grid Jiangxi Electric Power Co.,Ltd.,Nanchang 330000,China;School of Electrical Engineering,Zhejiang University,Hangzhou 310000,China;Hangzhou Worui Power Technology Co.,Ltd.,Hangzhou 310000,China)

机构地区：[1]国网江西省电力有限公司,江西南昌330000 [2]浙江大学电气工程学院,浙江杭州310000 [3]杭州沃瑞电力科技有限公司,浙江杭州310000

出　　处：《电力系统保护与控制》2021年第11期54-60,共7页Power System Protection and Control

基　　金：国家重点研发计划项目资助(2017YFB0902800);国网江西省电力有限公司科技项目资助(521810190001)。

摘　　要：针对安全约束最优潮流(SCOPF)求解时规模太大、求解难度高的问题,提出了一种基于电网安全运行域的故障态约束过滤方法。首先利用电网故障态约束条件之间的实际物理意义与故障态约束的数学关系,通过预想故障分析选定有效监视支路。进而生成不等式约束组成的安全运行域,并利用电网潮流转移特性对故障不等式约束进行剩余系数过滤、转移系数过滤与数学深度过滤的多层筛选,大幅减少不等式约束条件数量。对IEEE118节点系统与实际电网的仿真,验证了该方法在解决工程问题上的实用性,体现了该算法的实用性和鲁棒性。Security-Constrained Optimal Power Flow(SCOPF)for a large-scale power system is a complex and difficult problem with high computational requirements.To solve the problem,this paper proposes a constraints reduction method based on the security operation domain of a power system.The proposed method includes two technologies.First,the monitored branches are determined according to the actual physical meaning and the mathematical relations between different post-contingency constraints,so that the security operation domain can be formed by a group of inequality constraints.Secondly,multi-layer screening,including residual coefficient,transfer coefficient,and mathematical depth filtering are performed on the post-contingency constraints according to the transfer characteristics of the power system,so that the number of inequality constraints can be greatly reduced.Simulation on the IEEE-118 system and an actual power system verifies the practicability,effectiveness,and robustness of the proposed method in solving these engineering problems.

关 键 词：安全约束 SCOPF 安全可行域 约束过滤 

分 类 号：TM744[电气工程—电力系统及自动化]