Method for decomposing medium-term electricity trading plan for cascade hydropower stations

Abstract

The invention belongs to the field of reservoir dispatching operation, a method for decomposing the medium-term electricity trading plan for cascade hydropower stations is disclosed, which aims at minimizing the deviation between the completion degree of monthly accumulated electricity generation and the completion degree of system plan, and adopts a heuristic algorithm to effectively determine the scheme for decomposing the electricity trading plan of cascade hydropower stations group into days. The technical scheme is as follows: Based on the daily load and runoff forecasting results, the load and inflow forecasting information from the current day to the end of the month is updated dynamically, and the objective function with the smallest deviation between the monthly cumulative power generation completion degree and the system planned completion degree is adopted to generate a set of power stations participating in the generation schedule adjustment, and the subsequent generation schedule is revised by rolling. The method of the invention can meet the demand that the medium-term transaction electric quantity of the cascade hydropower station group is decomposed to the day, andeffectively solves the practical problem that the current medium-term electric quantity transaction plan decomposition is not closely connected with the water balance of the upstream and downstream ofthe cascade hydropower station group, and the water balance of the upstream and downstream of the cascade hydropower station group is not closely connected.

Description

technical field [0001] The invention belongs to the field of reservoir dispatching and operation, and particularly relates to a method for decomposing mid-term power trading plans of cascade hydropower station groups. Background technique [0002] Under the double pressure of the slowdown in power demand growth and the rapid growth of power installed capacity, since 2013 the power supply in Yunnan Province has changed from seasonal abundance and shortage to annual surplus. 16.8 billion, 15.26 billion, 31.4 billion, and 28.7 billion. The direct reason for the difficulty of hydropower consumption is excess power capacity, and the deep-seated reason is the large-scale advanced development and centralized production of power sources, and the mismatch between power supply development and the electricity market. In order to solve the deep-seated contradictions faced by Yunnan's power industry, Yunnan has taken the lead in carrying out market-oriented electricity transactions in th...

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Problems solved by technology

[0002] Under the double pressure of the slowdown in power demand growth and the rapid growth of power installed capacity, since 2013, the power supply in Yunnan Province has changed from seasonal abundance and shortage to annual surplus. 16.8 billion, 15.26 billion, 31.4 billion, 28.7 billion. The direct reason for the difficulty of hydropower consumption is the overcapacity of electric power. The deep-seated reason is the large-scale advanced development and centralized production of power sources, and the mismatch between power supply development and the electricity market

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