特高压直流保护逻辑元件对保护特性的影响研究  

Study on the influence of logical module on UHVDC protective characteristics

作　　者：李豹[1] 熊双成 李金安[1] 赖桂森 

机构地区：[1]中国南方电网超高压输电公司广州局,广东广州510405

出　　处：《电力系统保护与控制》2015年第2期133-137,共5页Power System Protection and Control

摘　　要：为了研究特高压直流保护逻辑元件对保护特性的影响,针对保护的硬件构成,分析了信号处理回路数字滤波器的滞后效应和保护判据出口元件的积分累积效应,对逻辑元件的工作原理进行了说明。结合实际故障案例论述其对保护特性的影响,研究了通过修改逻辑元件内部配置以改善其工作特性的优化措施。通过对以往故障波形进行回放,验证了逻辑元件的工作特性得到了改善,保护没有发生误动作,可靠性得到了提高。部分优化措施已经在工程实践中得到应用,对直流系统运行维护和后续工程设计有一定参考意义。In order to investigate the impact of the UHVDC protection logic module on the protective properties, according to protection hardware configuration, the recursive lagged effects of filter module in the signal processing circuit and the integral cumulative effects of the protection criterion export module are analyzed, the working principle of the module is described, and combined with the actual failure cases its impact on the protection characteristic is discussed and the optimization measures by modifying the internal configuration of the logic module to improve its operating characteristics are researched. It is verified by the previous fault waveforms playback, characteristics of logic element is improved, no protection misoperation occurs, which can improve the reliability of UHVDC protection. Some optimization measures has already been applied in engineering practice, it has certain reference value on the operation and maintenance in other HVDC system and the design of the subsequent project.

关 键 词：特高压 直流保护 逻辑元件 保护特性 判据 

分 类 号：TM772[电气工程—电力系统及自动化]