特高压直流输电VBE装置故障闭锁分析及时序优化  

Fault Blocking Analysis and Time Sequence Optimization of VBE Device for UHVDC Transmission

作　　者：潘卫明[1] 许冬 卢东斌[1] PAN Weiming;XU Dong;LU Dongbin(NR Electric Co.,Ltd.,Nanjing 211102,China)

机构地区：[1]南京南瑞继保电气有限公司,江苏南京211102

出　　处：《电工技术》2021年第3期127-129,132,共4页Electric Engineering

摘　　要：特高压直流工程通常通过RTDS实时仿真技术对控制保护系统、换流阀阀基电子设备VBE装置的功能进行设计和验证。在某特高压直流工程RTDS试验系统对VBE装置断电试验过程中,出现了阀过流保护动作。为此结合故障时的闭锁时序,推导出换流阀触发异常,交流电源经由换流阀、旁通开关形成了两相短接导致阀过流保护动作的结论。最后,结合此类故障的特点,对闭锁时序进行了优化,并通过试验验证了优化后闭锁时序的有效性。RTDS real-time simulation technology is widely used for system design and function verification of control and protection system,as well as valve based electronic(VBE)system in UHVDC transmission project.During the power-off test of VBE device in the RTDS test platform of an UHVDC project,the valve over-current protection was detected.Combined with the blocking sequence of the fault,it is deduced that the converter valve was triggered abnormally,and the AC power source had formed a two-phase short connection through the converter valve and the bypass switch to cause the valve overcurrent protection action.Finally,combined with the characteristics of such faults,the block sequence is optimized,and the effectiveness of the optimized block sequence is verified by the test result.

关 键 词：特高压直流输电 RTDS实时仿真 阀过流保护 阀基电子设备 闭锁时序 

分 类 号：TM744[电气工程—电力系统及自动化]