应对特高压直流阀组相继故障的跨区交直流协调控制方法  

Coordinated Control Method of Interconnected Grid to Solve Cascading Faults of UHVDC Valve Groups

作　　者：吴萍[1] 赵兵[1] 郭剑波[1] 卜广全[1] 李勇 刘长义[3] 徐友平 姜国庆[3] 奚江惠 胡扬宇[3] 邵德军 

机构地区：[1]电网安全与节能国家重点实验室(中国电力科学研究院),北京市海淀区100192 [2]国家电网华中电力调控分中心,湖北省武汉市430077 [3]国网河南省电力公司,河南省郑州市450008

出　　处：《电网技术》2017年第5期1460-1467,共8页Power System Technology

基　　金：国家高技术研究发展计划(863计划)(2011AA05A119)~~

摘　　要：特高压直流控制保护的最小单位由极控制保护变为阀组控制保护,有可能发生阀组相继闭锁故障,而传统交直流协调控制方法针对直流紧急功率1 s内仅能进行1次,无法多次动作,直流快速功率支援能力不能充分发挥。应对特高压直流换流器短时相继故障,提出延时调制直流的交直流协调控制方法,通过优化直流功率紧急控制时机,充分发挥了直流对切负荷措施的替代作用,解决了因直流功率调整功能约束导致切负荷量过大的问题。该方法已应用于华中电网跨区交直流协调控制系统。Recently, UHVDC control and protection system based on pole level was already canceled. Now configuration of UHVDC block fault is cascading failures of valve groups. However, traditional coordinated control could only be executed once in one second. As a result, DC fast power support capacity cannot be fully played. To solve cascading faults of UHVDC converters in short time, a coordinated control method modulating DC power after certain time was proposed. By optimizing DC power emergency control timing, DC could fully play replacement role of load shedding measures, solving the problem of too large load-shedding quantity due to constraint of DC power adjustment ability. The method is already applied to AC-DC coordinated control system in Central-China power grid.

关 键 词：阀组相继故障 强直弱交 交直流协调控制 量化措施 

分 类 号：TM721[电气工程—电力系统及自动化]