用于等效测试大电流互感器抗干扰性能的非均匀缠绕线圈的设计方法  

Design Method of Non-uniformly Distributed Winding for Anti-interference Equivalent Test of Heavy Current Transformers

作　　者：高宇澄[1] 赵伟[1] 李凯特 屈凯峰 李鹤 邵海明[4] GAO Yucheng;ZHAO Wei;LI Kaite;QU Kaifeng;LI He;SHAO Haiming(State Key Laboratory of Control and Simulation of Power System and Generation Equipments, Department of Electrical Engi- neering, Tsinghua University, Beijing 100084, China;Beijing Intemet Based Engineering Co., Ltd., Beijing 100083, China;China Electric Power Research Institute, Wuhan 430074, China;National Institute of Metrology, Beijing100029, China)

机构地区：[1]清华大学电机工程与应用电子技术系电力系统及发电设备控制和仿真国家重点实验室,北京100084 [2]北京云道智造科技有限公司,北京100083 [3]中国电力科学研究院有限公司,武汉430074 [4]中国计量科学研究院,北京100029

出　　处：《高电压技术》2018年第6期2089-2096,共8页High Voltage Engineering

基　　金：国家自然科学基金(51377088)~~

摘　　要：为了更准确地验证非均绕等安匝法的物理原理,探索实施非均绕等安匝法的最佳技术路线,提出了非均绕等安匝法用非均匀缠绕线圈参数的优化设计方法。为此,首先完善了表征干扰磁场的解析模型,并利用铁芯汇集系数修正了干扰磁场的解析计算结果;基于大量的数值仿真试验结果,推导出了适用于大电流互感器的铁芯汇集系数经验公式;进而依据表征线圈泄漏磁场的解析式,提出了两种用于优化非均匀缠绕线圈参数的设计方法,即L2范数最小法和部分级数求和法。通过数值仿真,分析了基于这两种方法得到的线圈泄漏磁场与外电流产生的杂散磁场之间的误差,发现这两种方法可将两种干扰磁场之间的误差由之前的约20%降低到约1%;通过物理试验,验证了该非均匀缠绕线圈参数优化设计有关结论的正确性。To accurately verify the physical principle and to explore appropriate technical routes for the anti-interference testing of heavy current transformers（HCT）, we discuss the optimal design of testing coils for ＂non-uniformly distributed equal ampere-turns testing method＂ in detail. Specifically, an improved physical model of the interfering magnetic field is illustrated, and a core-pickup factor is introduced for calibration, which is valued by an empirical equation summarized from simulation studies. Based on the physical model, two different approaches for the optimization of the testing coil are proposed, namely, L2 norm minimum method and partial summation equivalent method. The superiority of the proposed testing coil optimization methods, compared to the previous designs, are verified by both simulations and experiments, which are also applied for validating the theoretical analysis.

关 键 词：大电流互感器 线圈泄漏磁场 非均绕等安匝法 电磁屏蔽 电磁场数值计算 

分 类 号：TM452[电气工程—电器]