Real-time risk rssessment and pre-alarm mode study for district power grid

ZHANG Li-zong1， ZHANG Feng-ming1， SHEN Gu1， PAN Kai-yan2， QUAN Yu3， ZHANG Yu-you2
（1. Shaoxing Electric Power Bureau， Shaoxing 312000， China；
2. Dongfang Electronics Co.， Ltd.， Yantai 264000， China；
3. Shaoxing Science and Technology Information Institute， Shaoxing 312000，China）

Abstract： Aiming at the shortage of traditional energy management system in providing reasonable strategies and plans while grid equipments are in maintenance status， the algorithm mixed AC and DC flow checking technology and the interactive risk release pattern based on Web application technology were used in power grid auxiliary risk analysis system. Combining with the actual situation of district power grid and taking analysis of phenomenon that grid equipments need regular maintenance in normal operation， a comprehensive solution for grid risk assessment was presented， which contains the dealing program that composed of maintenance equipments determining， weak equipments determining， risk library building， risk level determining， risk publication and so on. The results indicate that the method of grid risk assessment and pre-alarm mode has a wide application range， and is available in risk control and analysis and grid operation mode arrangement and examination in region and county dispatching system， and grid safety and steady operation can be ensured， and user's ability to control and manage the risk in grid can also be roundly improved.
Key words： risk assessment；maintenance；weak equipment；N-1