The Vargas equilibrium theory is introduced into spot power market for pricing ancillary services together with energy. Firstly, the general competitive equilibrium model of power market is established by taking the active power, reactive power and operating reserve as traded commodities. Then, impact on active power pricing is analyzed according to partial competitive equilibrium model of power market. Finally, the equal price method is used to calculate the Vargas equilibrium point. Case study on IEEE30-bus system shows that the method proposed is very effective.
In order to ensure an orderly connection between mid- and long-term trading and spot trading, mid- and long-term trading will gradually form a mid- and long-term trading power curve, shifting from electricity trading to power trading. At present, there are usually two ways to decompose the curve of mid- and long-term contracts: both market parties in the power generation and power consumption make agreements on power curves; market operating agencies decompose electricity contract according to the typical curve. However, the method of decomposition according to the typical curve cannot serve specific subjects accurately, which indirectly affects the production and consumption behavior of market subjects. Furthermore, the full competition of the electricity market is hindered, and the smooth and sound development of the electricity market is affected. This paper proposes a fair power curve decomposition method for mid- and long-term contracts, which fully considers the needs and economic interests of both parties to the contract, and performs power curve decomposition based on the optimization model of social welfare maximization, so that the decomposition results can be quantified and optimized decomposition results can be obtained.
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