Reliability analysis of substation protection system based on Markov model with conventional sampling and intelligent tripping
He Changgen1, Zhang Lu2, Nan Dongliang2, Wang Wenhuan3, Lu Xiaorong4
1. State Grid Xinjiang Electric Power Co., Ltd, Urumqi 830000; 2. Electric Power Research Institute State Grid Xinjiang Electric Power Co., Ltd, Urumqi 830000; 3. China Electric Power Research Institute, Beijing 100192; 4. Nanjing Guodian Nansi Technology Development Co., Ltd, Nanjing 211106
Abstract:In order to improve the reliability of secondary equipment operation in Intelligent Substation, Real-time on-line evaluation of secondary equipment operation status is necessary. In this paper, the characteristics of 750kV substation in Xinjiang are analyzed, which are the conventional sampling intelligent tripping mode, and in an extreme operating environment. Therefore, this paper establishes a Markov dynamic model of typical line spacing in conventional sampling intelligent trip substation, which takes into account extreme operating conditions. The reliability of semi- conventional-semi-intelligent substation protection system is theoretically analyzed. It is concluded that this method can provide a good theoretical support for the requirements of substation maintenance plan.
何常根, 张路, 南东亮, 王文焕, 陆小荣. 基于Markov模型的常规采样智能跳闸变电站保护系统的可靠性分析[J]. 电气技术, 2019, 20(12): 17-22.
He Changgen, Zhang Lu, Nan Dongliang, Wang Wenhuan, Lu Xiaorong. Reliability analysis of substation protection system based on Markov model with conventional sampling and intelligent tripping. Electrical Engineering, 2019, 20(12): 17-22.