Spare Capacity Assessment Methods In East China Power Grid

With the durative developement of economic and electric load in China, installed capacity is insufficiency correspondingly. The shortage of electric power which is prevalent all over the country restricts economic development and leads to great loss. On the other hand, network stable operation is influenced without sufficient adequate reserve capacity. Therefore, it is necessary to keep enough and reasonable reserve.This thesis discusses certain method which is adopted by most of electrical power companies in China and points out its disadvantages. In succession, from the point of the view of reliability, methods for reserve capacity evaluation of generating system were presented. Mthods which are adopted by PJM and NEMCO respectively are introduced.Reserve level of East China Grid in 2003 is evaluated using analytic and Monte Carlo methods respectively. Results are presented and compared. For East China Grid, lack of reserve capacity is the main problem at present. At last, some factors, such as energy sources structure, network restriction and reliability indexes, are discussed and some suggestions are presented.