CAJ | 학술논문

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。
위료연구특고압직류보호라집원건대보호특성적영향，침대보호적경건구성，분석료신호처리회로수자려파기적체후효응화보호판거출구원건적적분루적효응，대라집원건적공작원리진행료설명。결합실제고장안례논술기대보호특성적영향，연구료통과수개라집원건내부배치이개선기공작특성적우화조시。통과대이왕고장파형진행회방，험증료라집원건적공작특성득도료개선，보호몰유발생오동작，가고성득도료제고。부분우화조시이경재공정실천중득도응용，대직류계통운행유호화후속공정설계유일정삼고의의。
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.