Research On Risk Assessment Model And Countermeasure Of Mountain Fire Disaster

The power system is a collection network with different kinds of power structures and facilities.In order to realize the high development of economic development,the scale and construction pace of the power grid are speeding up.The Chinese energy pattern and the level of economic development is unbalanced,there is a need to achieve the long-distance transmission.Many long-distance high-voltage lines through mountainous and forest area,the fire is easy to spread to the nearby overhead line corridor,causing the line outage.If the line reclosing fails,it will cause a blackout accident.In this case,the study of mountain fire disaster is particularly important for the prediction of the cascading failure of the power grid.Aiming at the data and prediction of wildfire disaster in power grid,the probability analysis method is introduced to calculate the risk of power system failure under wildfire disaster and evaluate the impact of wildfire disaster on power grid system by location and type of initial fault.The summary of this article is as follows:1.It expounds the importance of wildfire disaster prevention and risk assessment in power grid system,collects data of wildfire disasters in some power grid systems in the past revealing the impact of mountain fires on power grid system.It provides case support for the risk assessment model of mountain fire disaster and reveals its significance.2.Establish a risk and probability imodel for wildfire disasters,take account of the occurrence and process functions of some meteorological factors that are affected by disasters,and briefly describe the occurrence probability model of fire and line trip model.The simulation of line tripping is described in the case of a mountain fire,and a demonstration is carried out.3.The probability analysis method of cascading failure of power grid is established,and each link of the chain fault is described in accordance with the possibility of the possible process of the cascading failure of the power grid.A grid risk assessment method for cascading failures is summarized.By calculating node voltage limit,isolated load and other indicators,the impact degree of power grid fault is evaluated,and the weak links in the system are identified.4.Through the design of the IEEE39 node system,the risk assessment and risk analysis are carried out.Through the analysis of the results of the system,the risk of the power grid is identified effectively,and the reference for the following operation and protection is provided.