变压器集成调控滤波系统及其无源控制方法  

Transformer integrated active filtering system and its passive control method

作　　者：徐勇 刘乾易 李勇[2] 何哲 向运琨 曾麟 XU Yong;LIU Qian-yi;LI Yong;HE Zhe;XIANG Yun-kun;ZENG Lin(State Grid Hunan Integrated Energy Service Company Limited,Changsha 410007,China;National Electric Power Conversion and Control Engineering Technology Research Center,Hunan University,Changsha 410082,China)

机构地区：[1]国网湖南综合能源服务有限公司,长沙410007 [2]湖南大学国家电能变换与控制工程技术研究中心,长沙410082

出　　处：《电机与控制学报》2019年第12期135-142,共8页Electric Machines and Control

基　　金：湖南省研究生科研创新项目资助(CX2018B167);国家自然科学基金(51822702);湖南省科技重大专项(2017GK2241);长沙市杰出青年创新项目(KQ1707003)

摘　　要：大功率电解整流系统低压侧呈现出大电流特性,难以实施电能质量治理措施,给整流变压器造成极大危害。提出一种变压器集成调控滤波系统,有源滤波器通过变压器特殊定制的第三绕组接入系统并向其注入补偿电流,利用二次绕组之间的磁势平衡抑制变压器铁心谐波磁通。首先揭示了变压器集成调控滤波系统的滤波机理,获得补偿电流指令量;建立其欧拉-拉格朗日模型,在无源控制律中增加虚拟注入阻尼实现其良好的跟踪性能;在内外部参数扰动情况下,分析了滤波系统的稳定性能;最后,仿真结果验证了理论分析,说明该系统能在变压器二次绕组之间进行谐波抑制,有利于改善变压器的电磁环境。The low-voltage side of the large-power rectifier system has the characteristic of large current,which makes it hard for power quality management.It also has the negative effect on the rectifier transformer.This paper proposes a transformer integrated active filtering system.The active filter accessed the system via the special designed transformer,and injected the compensating currents.The harmonic flux in the transformer was suppressed due to the magnetic potential balance between the secondary windings.First,the filtering mechanism was revealed,and the reference compensating current was obtained.The Euler-Lagrange model was then established.Virtual damping was added into the passive control law to realize the satisfactory tracking performance.Furthermore,the system stability was analyzed considering the internal and external disturbance.Finally,the theoretical analysis was verified by means of simulation results,which shows that the filtering system can suppress the harmonic between the secondary windings and improve the electromagnetic environment of the transformer.

关 键 词：电能质量 无源控制 有源滤波 整流变压器 

分 类 号：TM41[电气工程—电器]