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Ancillary services to meet the safe and economic operation of the power system, the necessary measures to guarantee the power quality. In the electricity market, in order to avoid the one-sided pursuit of economic efficiency could lead to system instability, there is an urgent need to take economic measures to ensure the stability of the system. Ancillary services market operation and management departments must be purchased from independent power generation company, and unified control use. Auxiliary services are a commodity, its use must be given the necessary economic compensation. At the same time, must be integrated into the cost, revenue, pricing, and the entire system effective optimization problems. On the basis of a careful analysis of the electricity market constitutes its basic principles, the State Electricity Regulatory Commission, \ancillary services were classified, described the function of each auxiliary services. Ancillary services are mainly used to ensure reliability of supply and the quality of the electrical energy in the electricity market environment, it has been given a new content, access to ancillary services no longer obey the unified control of the system, the pricing of ancillary services market participants the most concern. Therefore, foreign access to ancillary services and pricing, come to our country in the initial stages of the electricity market, ancillary services procurement and pricing methods. Auxiliary service is essentially a commodity, its use should be given some financial compensation, and must consider the costs, benefits, pricing, and the entire system effective optimization problems. Therefore, this article discusses the ancillary services, pricing mechanisms and cost recovery mechanisms. Introduces the active role of control in the power system frequency, and frequency standards and assessment instructions, combined with the actual situation of the Yunnan power grid to select the appropriate AGC service auction model, at the same time on the basis of the existing AGC service billing methods adapt better to the Yunnan Power Grid and network the AGC service improvements in the power plant auxiliary services. According to the generator as reactive power, active output and income, detail analysis of reactive ancillary services operators market, the combination of several reactive pricing method reactive pricing. 4. Systematic exposition of the Yunnan power grid ancillary services market mode, metering and settlement of ancillary services and grid power plants of various auxiliary services charges on. Meanwhile, the East China regional electricity market decision-making management system, a detailed analysis of the Yunnan power grid power plant auxiliary service proposed decision management system played a reference.
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