基于Ward等值的三绕组变压器并列运行方式实用辨识方法  

Practical Identification Method for Operation Mode of Three-winding Transformers Running in Parallel Based on Ward Equivalence

作　　者：李振文 王娟 颜伟[2] 徐彪 刘力 李龙 LI Zhenwen;WANG Juan;YAN Wei;XU Biao;LIU Li;LI Long(State Grid Hunan Electric Power Company Limited,Changsha 410029,China;State Key Laboratory of Power Transmission Equipment&System Security and New Technology(Chongqing University),Chongqing 400044,China)

机构地区：[1]国网湖南省电力有限公司,长沙410029 [2]输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆400044

出　　处：《电力系统及其自动化学报》2024年第10期151-158,共8页Proceedings of the CSU-EPSA

摘　　要：变压器运行方式直接影响到电网的实时监视和控制。为准确反映电网运行信息,提出一种三绕组变压器并列运行方式的实用辨识方法。基于三绕组变压器并列运行的拓扑结构及其等值电路,结合简单环形网络的潮流分布公式与Ward等值方法,推导出两台和3台变压器高/中两侧并列运行时的有功功率分配关系。在合理近似的条件下提出变压器并列运行的有功功率分配比例判据,实现变压器并列运行方式的高效辨识。基于典型算例潮流的模拟数据和实际变电站的实测数据,仿真验证所提方法的有效性。The operation mode of transformers directly affects the realtime monitoring and control of power grid.To accurately reflect the information about power grid operation,a practical identification method for the operation mode of three-winding transformers running in parallel is proposed.Based on the topological structure and equivalent circuit model of three-winding transformers in parallel and with the combination of the power flow distribution formula for a simple ring network and Ward equivalence,the active power distribution relations for two and three three-winding transformers running in parallel on high-and medium-voltage side are deduced,respectively.The criterion of active power allocation proportion is proposed for transformers running in parallel under an approximate condition,thus realizing a high-efficiency identification of the operation mode of transformers running in parallel.The effectiveness of the proposed method is verified by simulation results based on the power flow simulation data of typical examples as well as the measured data of actual substations.

关 键 词：WARD等值 三绕组变压器 运行方式 辨识方法 

分 类 号：TM715[电气工程—电力系统及自动化]