2021 6th Asia Conference on Power and Electrical Engineering (ACPEE) | 2021
Yunnan electric power market framework and operation effect analysis
Abstract
Yunnan province of China is rich in hydraulic resources and the hydropower station installed capacity accounted for 84%. Yunnan began to explore direct long-term transactions between generators and large users in 2014, however, due to the complexity of the construction of electricity spot market, it is difficult to build a mature spot market in Yunnan in a short time, therefore a day-ahead incremental trading, as a transitional product to mature spot market, is designed in 2016. Based on the characteristics of Yunnan Power System, this paper summarizes and analyzes the market structure and key market mechanism of Yunnan Power Market, including market participants, trading products, long-term reserve compensation mechanism for thermal power plants, balancing funding mechanism, flow coordination mechanism between cascade hydro-power stations. At last, the operation effect of the day-ahead trading in Yunnan province is also analyzed from several aspects, including the volatility analysis of day-ahead transaction price, correlation analysis between day-ahead transaction price and volume, customer-side default rate. Facts indict that, day-ahead trading in Yunnan significantly alleviate the problem of large prediction error of hydropower and users in annual and monthly transactions, thus reducing the custom-side default rate and promoting the optimal dispatching of hydropower.