A Decomposition Method for Medium-Term Power Trading Plan of Cascade Hydropower Station Group

Abstract

The invention belongs to the field of reservoir dispatching and operation, and relates to a method for decomposing the medium-term power trading plan of cascade hydropower station groups. The goal is to minimize the maximum value of the deviation between the completion degree of the monthly accumulated actual power generation and the completion degree of the system plan on the current day, and it can be effectively determined by using a heuristic algorithm. The monthly transaction plan of cascade hydropower station group is decomposed into daily plan. The technical solution is: use the daily scale load and runoff forecast results to dynamically update the load and inbound flow forecast information from the current day to the end of the month, and use the objective function that minimizes the maximum deviation between the monthly actual power generation completion degree and the system plan completion degree. , to generate a set of power stations participating in the adjustment of the power generation plan, and to make rolling corrections to the subsequent day's power generation plan. The method of the present invention can meet the demand of cascade hydropower station groups for decomposing mid-term transaction electricity to daily, and effectively solves the practical problem that the current mid-term electricity transaction plan decomposition and cascade upstream and downstream water volume balance are 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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