链式STATCOM冗余容错过程的开关暂态分析  

Switching transient analysis of redundant fault-tolerant process of cascaded STATCOM

作　　者：张扬 万安平 邓才波 林卫星 ZHANG Yang;WAN Anping;DENG Caibo;LIN Weixing(School of Mechanical and Electric Engineering,Nanchang Institute of Technology,Nanchang 330099,China;State Grid Jiangxi Electric Power Research Institute,Nanchang 330096,China;School of Mechanical Engineering,Zhejiang University,Hangzhou 310027,China;TBEA Xinjiang New Energy Co.,Ltd.,Urumqi 830011,China)

机构地区：[1]南昌工程学院机械与电气工程学院,江西南昌330099 [2]国网江西省电力有限公司电力科学研究院,江西南昌330096 [3]浙江大学机械工程学院,浙江杭州310027 [4]特变电工新疆新能源股份有限公司,新疆乌鲁木齐830011

出　　处：《电力自动化设备》2021年第4期64-69,76,共7页Electric Power Automation Equipment

基　　金：国家自然科学基金资助项目(51867019);中国博士后基金资助项目(2019M652278);江西省博士后择优资助项目(2018KY13);江西省教育厅科技项目(GJJ180961);陕西省重点研发计划项目(2017ZDXM-GY-135)。

摘　　要：功率模块的冗余容错控制对链式静止同步补偿器(STATCOM)可靠性的提高非常关键。冗余容错包括故障容错和异常容错2种,而目前多采用理想模型来描述系统冗余容错过程,不能很好地体现这2种情况中的开关暂态过程。提出了一种电路等效模型,综合考虑了接触器励磁回路、电弧放电等因素的影响,建立冗余容错过程中的开关暂态数学模型,并通过理论分析和试验对比理想模型和所提模型。对比结果表明,所提模型可以更准确地描述系统冗余容错过程中的开关暂态过程。The redundant fault-tolerant control of power module is critical to the improvement of cascaded STATCOM(STATic synchronous COMpensator)reliability.Redundant fault tolerance includes fault tolerance and abnormal fault tolerance.At present,the ideal models are often used to describe the redundant faulttolerant process of the system,which cannot well reflect the switching transient process in these two situations.So an equivalent circuit model is proposed,which comprehensively considers the influence of contactor excitation circuit and arc discharge.The mathematical model of switching transient in redundant fault-tolerant process is established,and the proposed model is compared with the ideal model through theoretical analysis,simulation and experiments.Results show that the proposed model can more accurately describe the switching transient process in the redundant fault-tolerant process of system.

关 键 词：冗余容错 等效模型 链式STATCOM 暂态分析 旁路开关 

分 类 号：TM761.1[电气工程—电力系统及自动化]