基于控制目标松弛的输电设备过载预防控制在线决策  

An online decision-making method for the overload preventive control of transmission equipment based on the control objects relaxation

作　　者：王业 徐伟 徐遐龄 郑亮 李天然[1] 肖大军 WANG Ye;XU Wei;XU Xialing;ZHENG Liang;LI Tianran;XIAO Dajun(School of Electrical&Automation Engineering,Nanjing Normal University,Nanjing 210034,China;NARI Group Corporation(State Grid Electric Power Research Institute),Nanjing 211106,China;Central China Branch of State Grid Corporation of China,Wuhan 430077,China)

机构地区：[1]南京师范大学电气与自动化工程学院,江苏南京210034 [2]南瑞集团(国网电力科学研究院)有限公司,江苏南京211106 [3]国家电网有限公司华中分部,湖北武汉430077

出　　处：《电力工程技术》2023年第1期80-87,共8页Electric Power Engineering Technology

基　　金：国家自然科学基金资助项目(61933005);国家电网有限公司总部科技项目“跨区电网源荷不确定性安全风险在线评估与智能防御技术”(5100-202135022A-0-0-00)。

摘　　要：基于有功灵敏度的线性规划模型可快速有效地进行预防控制策略求解,但是由直流潮流法得到的有功灵敏度忽略了电压和网损的影响,导致预防控制策略结果难以满足交流潮流校核计算精度要求。为此,文中提出一种基于控制目标松弛的输电设备过载预防控制在线决策方法。首先,根据过载安全裕度确定参与控制的关键设备及对应预想故障下的有功灵敏度;然后,通过聚类分析对有功调整措施的搜索空间进行降维;接着,建立过载预防控制在线决策的线性规划模型;最后,按预防控制的有功精度将关键设备的有功限额按档位进行松弛,根据交流潮流校核结果确定最优解的搜索方向,不断逼近最优解。通过实际电网的算例分析验证了所提方法的正确性和有效性。The preventive control strategy can be solved quickly and effectively through the linear programming model based on active power sensitivity.However,the active power sensitivity obtained by the DC power flow method ignores the influence of voltage and network loss,which makes the control strategy checked by AC power flow difficult to meet the accuracy requirement.For this reason,an online decision-making method for overload preventive control of transmission equipment based on the control objects relaxation is proposed.Firstly,the key equipment is determined by overload security margin,and the active power sensitivity of adjusting measures to key equipment under different post-fault operating conditions is calculated.Secondly,the active power adjusting measures are clustered.Thirdly,a linear programming model for overload preventive control online decision-making is established.Finally,the active power limit of key equipment is relaxed according to the active power accuracy of preventive control,and the search direction of the optimal solution is determined by AC power flow calculation.The correctness and effectiveness of the proposed method are verified through the analysis of the actual power grid.

关 键 词：输电设备过载 过载预防控制 在线决策 有功灵敏度 线性规划 聚类分析 

分 类 号：TM734[电气工程—电力系统及自动化]