关于大型安全稳定控制系统可靠性研究的探讨

Discussion on reliability of large scale security and stability control system

特高压交直流电网建设过渡期,交直流交互影响加剧,送受端耦合紧密,电网安全稳定运行对于安全稳定控制系统(简称"稳控系统")的依赖性大大加强。稳控系统近年来呈现出大型化、广域化和复杂化趋势,对其可靠性的研究和设计显得尤为迫切。在分析稳控系统的构成原理及工作方式基础上,提炼出其可靠性研究的特点和难点,指出稳控系统整体可靠性的主要影响因素。针对当前稳控系统可靠性研究中缺乏系统性及关键环节把握不准等弊端,从设备跳闸判据、控制模式、通信通道、运行模式和总体架构等方面,提出了可靠性研究问题的重点及思路,从而形成了稳控系统可靠性研究的总体框架,对于稳控系统以及其他电力二次控制系统的可靠性优化设计具有重要的指导意义。

In the transition period of UHV power grid construction, AC-DC interaction intensifies, the sending end and the receiving end tightly coupled, security and stability operation of power grids rely more on the Security and Stability Control System （SSCS）, which show a large-scale, wide area and complicated trend in recent years, therefore the research and design on reliability of SSCS is particularly urgent. Based on the analysis of the composing principle and working mode of SSCS, the characteristics and difficulties of the reliability research are extracted, and the main factors that influence the overall reliability of SSCS are point out. In view of current research on SSCS reliability not enough systemic, and failure to grasp the key link, the key ideas of the reliability research are put forward from equipment tripping criterion, control mode, communication channel, operation mode, architecture and other aspects, thus forming the overall framework of the reliability research of SSCS, which has an important guiding significance for reliability optimization design of SSCS as well as the power grid secondary system.