Method for participating in power spot market clearing calculation by hydraulic power plant

Abstract

The invention discloses a modeling method for participation of a hydraulic power plant in electric power spot market clearing calculation. A water level reservoir capacity curve, a water head water consumption rate curve and a tail water level flow curve of the hydraulic power plant are processed through a partwise linearization method. And further establishing a hydraulic power plant water levelflow constraint, a cascade hydraulic connection constraint, a vibration area constraint, a water abandoning electric quantity constraint and a water abandoning electric quantity penalty function, andadding the constraint conditions and the penalty function into the electric power spot market clearing model so as to form a complete mathematical model considering participation of the hydraulic power plant in electric power spot market clearing calculation. According to the invention, the clearing calculation result of the electric power spot market can fully consider the influence caused by various constraint conditions of water and electricity; and meanwhile, the complexity of a spot market mathematical model caused by hydroelectric constraints is also reduced to a certain extent, so thatthe model solving speed is controlled within an engineering practical allowable range, and the method has engineering practical value.

Description

technical field [0001] The invention relates to the technical field of electric power spot market, in particular to a method for hydropower plants to participate in the clearing calculation of the electric power spot market. Background technique [0002] In the electricity spot market, the power generation companies participating in the market report power generation before the trading day, and the electricity sales companies and wholesale users participating in the market report electricity consumption. Various constraints such as bus load forecasting, tie-line planning, maintenance planning, etc., with the goal of maximizing social benefits, use the safety-constrained unit combination (SCUC) and safety-constrained economic dispatch (SCED) algorithms to calculate the clearing of the power spot market, and get Combination of start and stop, winning bid output curve and node electricity price. [0003] The participation of thermal power units in the power spot market has a m...

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Problems solved by technology

On the other hand, the participation of hydropower in the electricity spot market will bring huge challenges to clear calculations. Several characteristic curves of hydropower plants are nonlinear, and there are cascade coupling relationships between hydropower plants. In addition, the inherent vibration range of hydropower units problems, which greatly increase the difficulty of clearing calculations

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