An optimization method for electric power balance based on the reliability of wind power capacity

Abstract

The invention relates to the technical field of power system automation, in particular to a power and energy balance optimization method based on wind power capacity credibility. The power and energybalance optimization method comprises the steps that data of thermal power and hydropower units of provinces in a study area are collected; load forecast curves and wind power forecast outputs of theprovinces in a decision-making period are obtained; wind power credible forecast outputs are obtained according to the wind power capacity credibility and the wind power forecast outputs; a tie line transmission power plan is drawn up, the maximum and the minimum of transmission power are set in time segments; the minimum operating cost of the whole network is used as a target operation function,and power balance constraint, unit operation constraint, tie line transmission constraint, electric quantity constraint and rotation reserve constraint are used as constraint conditions, so that a power and energy balance optimization model is established; and the optimal outputs of generator sets of the provinces and the transmission power of tie lines between the provinces are obtained by solving the model. The uncertain wind power outputs are converted into credible unit outputs through wind power credibility calculation, and the problem that a traditional power and energy balance method cannot properly consider wind power is solved.

Description

technical field [0001] The invention relates to the technical field of electric power system automation, in particular to an electric power balance optimization method based on wind power capacity reliability. Background technique [0002] In recent years, with the slowdown of power demand, the increasingly prominent contradictions in the development of coal power, and the large-scale continuous connection of intermittent energy sources such as new energy to the power grid, the uncertainty and complexity of the medium and long-term power balance have increased significantly. Regional power grids are facing Due to the high pressure of peak regulation, traditional power balance analysis is difficult to meet the accuracy requirements of large-scale access to power grid planning for new energy. As a large number of UHV AC and DC transmission lines have been built and put into operation or have entered the construction schedule, my country's UHV technology has made a huge breakth...

AI Technical Summary

Problems solved by technology

In order to give priority to the consumption of wind power, some models consider wind curtailment, and the penalty cost is included in the objective function, but it is impossible to judge the location of the curtailed wind

[0004] In addition, the traditional tie line power transmission plan is compiled by dispatchers based on experience, which is difficult to meet the requirements for wind power with uncertain output to participate in dispatching

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