Cascade hydropower station short-term robust scheduling method coupling daily electric quantity decomposition and day-ahead market bidding

Abstract

The invention provides a cascade hydropower station short-term robust scheduling method coupling daily electric quantity decomposition and day-ahead market bidding, and the method comprises the steps:building a deterministic hydropower short-term optimal scheduling model by taking the maximum total income of a cascade hydropower station as a target; converting the deterministic short-term optimization scheduling model into a robust scheduling model considering the uncertainty of the electricity price; and solving by adopting a mixed integer nonlinear programming method. According to the method, the daily electric quantity of the cascade hydropower station can be scientifically and reasonably decomposed into the electric power curve, effective execution of the daily contract is guaranteed,the declared quantity-price pair participating in the day-ahead spot market is obtained, and the obtained scheduling result of the cascade hydropower station has robustness and is reflected in that when the clearing price is within the estimated price information gap, the method can guarantee that the expected target is not worse than a certain minimum preset result, can quantitatively describe the relation between the uncertain parameter change range and the minimum acceptable target, and can provide a more flexible and intuitive scheduling and transaction decision basis for decision makersof cascade hydropower enterprises with disgusting risks.

Description

technical field [0001] The invention relates to the field of electric power market and the field of hydropower dispatching operation, in particular to a short-term robust dispatching method for cascade hydropower stations coupled with daily power decomposition and day-ahead market bidding. Background technique [0002] Since the new round of power system reform, China's power marketization process has advanced rapidly, medium and long-term transactions have gradually matured, spot market pilots are being carried out in an orderly manner, and 8 pilot units have entered simulated trading and settlement trials. The gradual establishment of the spot market environment is bound to bring more theoretical and practical challenges to hydropower companies participating in market-oriented transactions. [0003] Affected by the uncertainty of runoff and the uneven distribution of time and space, in the power spot market environment, hydropower companies need to make full use of the res...

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Problems solved by technology

However, it also faces the following two problems: 1) In the medium and long-term transaction contracts under the spot mode, the market participants sign the power curve or define the decomposition method in advance, and form a time-sharing power curve before the specified time, so as to facilitate the day-ahead market organization and financial settlement , the results of curve decomposition will affect the comprehensive income of power generation enterprises

2) The spot market price reflects the short-term supply and demand relationship and space-time value of electric energy, which has strong uncertainty

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