电网技术2016，Vol.40Issue(9)：2646-2653,8.DOI:10.13335/j.1000-3673.pst.2016.09.010
特高压直流输电工程直流分压器动态特性及其引起的误闭锁机理研究
Mechanism Analysis of Error Block Caused by Dynamic Characteristics of DC Voltage Divider in UHVDC
摘要
Abstract
In order to conduct mechanism analysis of error block caused by dynamic characteristics of DC voltage divider (DCVD) in UHVDC, transient breakdown process in DCVD secondary side is theoretically derived by means of transfer function derivation in the paper firstly. Theoretical results show that even primary side DC voltage remains unchanged after breakdown in DCVD secondary side, voltage measurement results also experience a transient process of hundred milliseconds before it returns to normal levels. Secondly, an accident of HVDC block caused by DCVD is analyzed. Response characteristics of control and protection system are studied, and HVDC error block mechanism is proposed. Thirdly, correctness of theoretical analysis is verified with PSCAD/EMTDC simulation, and some countermeasures for avoiding the accidents are proposed. Finally, analysis shows that there is no risk of HVDC error block on condition of breakdown in secondary side of inverter DCVD.关键词
高压直流/直流分压器/控制保护系统/VDCOL/欠压保护Key words
HVDC/DC voltage divider/control and protection system/VDCOL/under-voltage protection分类
信息技术与安全科学引用本文复制引用
滕予非,汤涌,汪晓华,陈刚,刘耀,张宏图..特高压直流输电工程直流分压器动态特性及其引起的误闭锁机理研究[J].电网技术,2016,40(9):2646-2653,8.基金项目
国家电网公司科技项目(特高压直流控制封装环节仿真建模处理技术研究与应用)。 Project Supported by State Grid Science & Technology Project （特高压直流控制封装环节仿真建模处理技术研究与应用）
