A method for optimizing medium- and long-term scheduling and repair plans of cascade hydropower stations in a market environment

Abstract

The invention belongs to the technical field of scheduling and repair of cascade hydropower stations and in particular relates to a method for double-layer optimization of medium- and long-term scheduling and repair plans of cascade hydropower stations in a market environment. According to the invention, in order to reduce the influence of repair plans of cascade hydropower stations on operation revenue, a cascade hydropower station medium- and long-term scheduling and repair plan double-layer optimization model is built to achieve joint optimization of medium- and long-term scheduling and repair plans. In a medium- and long-term scheduling optimization process, decisions are made according to runoff and price prediction and the genetic algorithm is employed to optimize the output of cascade hydropower stations in each period so as to search for the optimal revenue space. In a repair plan optimization process, with priority being given to the influence of the coupling relationships ofwaterpower and electric power of cascade upstream and downstream hydropower stations on repair plans and with an intermediate result of medium- and long-term scheduling being a boundary condition andthe minimum repair loss being an optimization target, the repair loss optimization result and the medium- and long-term power generation revenue are combined to be total revenue, so that joint optimization is achieved.

Description

technical field [0001] The invention belongs to the technical field of dispatching and maintenance of cascade hydropower stations, and in particular relates to a method for optimizing medium and long-term dispatch and maintenance plans of cascade hydropower stations in a market environment. Background technique [0002] After years of "watershed, cascade, rolling, and comprehensive" development, the southwest of my country has gradually formed a group of cascade hydropower stations in super-large river basins and main streams. With the continuous advancement of power marketization, it has become a trend for cascade hydropower stations to participate in the power market and compete with other types of power sources. . The number of cascade hydropower stations is gradually increasing, and the installed capacity is gradually increasing. Their operating status has an increasingly significant impact on the operating efficiency of hydropower enterprises and the safety and stability...

AI Technical Summary

Problems solved by technology

At present, scholars at home and abroad have conducted in-depth research on how to prepare unit maintenance plans for power generation companies, but most of the studies deal with unit output plans and maintenance plans separately, that is, the formulation of output plans is based on a given maintenance status, which limits economic operation to a certain extent. optimize space

Some literatures put forward the idea of ​​comprehensive optimization of unit overhaul and dispatching plan, making decisions based on the fixed capacity and price of medium and long-term bilateral contracts, and short-term market electricity price forecasts, and the comprehensive benefits are significantly improved. However, the research objects are mainly conventional thermal power units, which affects the unit output. For hydropower stations that are limited and undertake social functions such as flood control and irrigation, they lack adaptability

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