Security Analysis And Countermeasure Study Of Xuzhou Power Grid

The security of regional power grid has been in lack of systematic research and analysis. With the enlargement of power grid scale, the various changes of operation conditions, and the development of power market, traditional approach of quantitative security assessment can not meet the requirement any longer. With the weakening of assuming risk, the security problem of power grid is becoming more and more serious. However, by the advantage of risk based security assessment (RBSA), it gets used to the new situation in power system and shows wider application prospect.Because of the serious situation of supplying and using power and the stabilization of power grid, it will be very important to decrease the range and time of power disaster for improving reliability of power grid in Xuzhou, and also the security of power gride in Jiangsu will be supported. Researches on RBSA are carried out in the thesis and the following work is done:1. The traditional security assessment of power system is analyzed and its shortcomings is pointed out.2. Introducing the concept of vulnerability of power system the methode based on risk security assessment is applied to power system to make up the disadvantages of the traditional one and the mode based on risk security assessment is established.3. The security of power grid in Xuzhou is assessed by the above method and the traditional one and the present security problems of Xuzhou grid are pointed out.4. The influence of the power grid structure is discussed against the power grid security. According to the conditions of Xuzhou grid, the security problems of it is analyzed and put forward the relative measures. At the same time, the construction of security defense system of power grid in Xuzhou is constructed.