Daily electric quantity decomposition method in high-proportion hydroelectric spot market

Abstract

The invention belongs to the field of electric power markets and dispatching operation, discloses a daily electric quantity decomposition method under a high-proportion hydropower spot market, aims atsolving the daily electric quantity decomposition problem of transition from a medium-and-long-term electric power market to the spot market, realizes reasonable and feasible decomposition of daily electric quantity into a daily 96-point output curve, and provides boundary conditions for clearing of the spot market. According to the method, whether a power plant is a marketized power plant or notand the adjusting capacity of the power plant are fully considered. Power plants are divided into three types, and a standard load curve is obtained by deducting the power output curve with the curveand the power output curve of the second type of power plants in sequence through the predicted whole network load curve and serves as a curve decomposition reference of the third type of power plants, initial power generation curves of the power plants are formed, optimization calculation is conducted on the initial power generation curves, and finally 96-point power generation curves of the power plants are determined. The decomposition result of the method is reasonable and feasible, and the method has important leading significance for transition from a medium-and-long-term power market to an on-spot market in a high-proportion hydropower area.

Description

technical field [0001] The invention belongs to the field of power market and dispatching operation, and in particular relates to a method for decomposing daily electricity in a high-proportion hydropower spot market. [0002] technical background [0003] There are many problems to be faced in the mid-to-long-term power market transition to the spot market, the most critical of which is the decomposition of mid-to-long-term transaction electricity. The development of the spot market is very important, and domestic and foreign scholars' research on the decomposition of medium and long-term trading plans mostly focuses on the decomposition of monthly electricity into daily electricity, and there are few studies on the decomposition of daily electricity into 96-point curves. Especially for the hydropower-rich areas in Southwest my country, the power decomposition should not only consider the real-time supply and demand balance of electric energy and the security and stability o...

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Problems solved by technology

[0003] There are many problems to be faced in the mid-to-long-term power market transition to the spot market, the most critical of which is the decomposition of mid-to-long-term transaction electricity. The development of the spot market is very important, and domestic and foreign scholars’ research on the decomposition of medium and long-term trading plans mostly focuses on the decomposition of monthly electricity into daily electricity, and there are few studies on the decomposition of daily electricity into 96-point curves

Especially for the hydropower-rich areas in Southwest China, the power decomposition should not only consider the real-time supply and demand balance of electric energy and the security and stability of the power grid, but also have objective randomness and uncertainty due to the impact of runoff on climate changes such as temperature, rainfall, and evaporation. And the uneven distribution of time and space directly affects the power generation of hydropower stations, especially for cascade hydropower station groups, due to the existence of hydraulic and electric power connections, the effect of runoff uncertainty is further enhanced, and the transaction matching and coordination of upstream and downstream hydropower station groups on different time scales Constraints such as energy consumption and other constraints have further exacerbated the difficulty of electricity decomposition. Compared with the construction of spot markets in areas dominated by thermal power, the situation is more complicated

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