Large Users Purchasing Yunnan In The Electric Mode, Transmission And Distribution Pricing Methodology

The reform of electricity market is an inevitable trend of power industry in the world . A significant change is brewing in monopolized power systems all over the world .The main trend is to introduce a competitive mechanism, so as to a limited electricity power market. The problem of electricity pricing is increasingly being studied. During the reformation and opening of China, electricity pricing has become a big problem, which is not only strongly policy natured, but complex, both in theory and practice. As a supplement of single purchaser form, the direct power-purchase for large consumers is a favorable trial, which introduces the competition mechanism to the sale-side after the generation-side was opened. However, due to the differences of historical cause and development level, our country has not brought out a reasonable transmission pricing mechanism till now. How to making fair and reasonable transmission price is the key to carry out direct power-purchase pattern successfully, so it is meaningful to do some research on it and which is the discussed problems of this paper.The study of electricity pricing can be divided into two kinds of methods, namely the Accounting Approach and the Economics Approach. The former places stress on the billing balance, while the latter considers the full utilization of power resources, among of them, the marginal cost theory is the most famous. Firstly, this paper not only compares and analyzes methods of transmission pricing, point out the characters of them and conditions which they should fit in, but also analyzes the procedure of transmission business, composition of transmission cost and relating cost allocation methods. Then the successful experiments of some representative foreign countries and our country are introduced. Finally, according to the factual situation of Yunnan power industry development, the method of transmission pricing is fixed after identifying the principles of transmission pricing and analyzing the major factors which have influences on transmission pricing of Yunnan power grid. Next, by easy calculating method which is put forward by our government , and Posting Pricing, and Long-term marginal cost pricing figures out the transmission price .Finally, calculated results are compared and analyzed, the Posting pricing is the most fit-able pricing methods for Yunnan Power industry developing situation.This paper studies the new problem of transmission pricing under direct power-purchase for large consumer pattern, it has significant meanings on the operating administration of Yunnan Power Grid Company under the new circumstances of electricity innovation.