The Function Mode Research Of Power Web In Yan An Area

In recent years, there were some power cut accidents happened in international, many of the accidents were voltage breakdown that caused by incorrect action of relay protection automechanism after function mode was changed, then a large-scale of power cut tragedy was happened. Refer to the experiences of power cut accidents in and out of country, it has important society and economy sense for safe running in break-loop mode of Yan'an power net to highly regard and keep away of extending range accidents, indeed the safety and steady problems of the voltage breakdown system that were caused by the feebleness power support to the load center,irrationality collocation and setup of relay protection and insufficiency support of reactive voltage.The power web connection between Yan'an and shann'xi was strengthened as the continual construction and development of power web in Yan'an area these years, especially the founded and running of Zhu jia transformer substation up to 330KV, and there was a great change in web framework of Yan'an power web up to 110KV, forming an electromagnetic loop network with the high and low voltage levels of 330KV and 110KV. In order to make the running of Yan'an power web to be more steady,more economical and safer, the power balance of Yan'an power web was analyzed, the modeling and simulation of Yan'an power web were done by PS ASP software, the breaking loop point of Yan'an power web was confirmed, on the base of that the deep analysis and calculate of Yan'an power web was done under function of breaking loop in power web tide,earthing manner,the level of short circuit and safety in static state and so on. By the results of analysis, relevant improvement measures were advanced for problems existing in electricity power web circulation, and there were corresponding adjustments done to the function mode of electricity power web,mading it reasonable in the running and attempering of electricity power web.Besides that, the scheme of Yan'an power web ran under breaking loop was evaluated, the favorable and unfavorable affection were summarized for breaking loop to system's steady running and power supply's credibility, and brought forward advices in reason in programming and development of power web, provided technology safeguard and scientific guide for Yan'an power web.