Power grid economic dispatching comprehensive evaluation method considering source load uncertainty

Abstract

The invention relates to the technical field of power system dispatching, and provides a power grid economic dispatching comprehensive evaluation method considering source load uncertainty, which comprises the following steps: step 1, establishing a source side uncertainty calculation model: calculating actual fan output considering fan uncertainty and actual photovoltaic output considering photovoltaic uncertainty; 2, establishing a load side uncertainty calculation model: respectively calculating an electric load actual value, a gas load actual value and a thermal load actual value considering the uncertainty of the electric load, the gas load and the thermal load; 3, carrying out power grid economic dispatching comprehensive index calculation: calculating a power grid economic dispatching reliability index (power grid average power supply unavailability), an economic index and an undispatchability index (regulation and control accuracy) considering the source load uncertainty, and calculating the power grid economic dispatching comprehensive index considering the source load uncertainty; and 4, carrying out comprehensive evaluation of power grid economic dispatching. According to the invention, the accuracy of power grid economic dispatching evaluation can be improved.

Description

technical field [0001] The invention relates to the technical field of electric power system dispatching, in particular to a comprehensive evaluation method for power grid economic dispatching considering source-load uncertainty. Background technique [0002] As the penetration rate of renewable energy continues to increase, the intermittence and volatility of the source side and the difficulty of forecasting the load side continue to increase. When the source and load prediction errors are too large, it will have a great impact on power grid dispatching. In order to improve the reliability of system operation and improve the operation economy, it is necessary to fully consider the relationship between the prediction error caused by the uncertainty of source and load and the economic dispatch of the power grid. relationship and provide a reasonable basis for improving economic operation. [0003] First of all, in the calculation method of economic dispatching of the power g...

AI Technical Summary

Problems solved by technology

The economic dispatching calculation of this kind of power grid focuses on the goal of economic optimization, and a single economical calculation cannot guarantee the reliability and dispatchability requirements of the power grid dispatching process

[0004] In the calculation method of power grid economic dispatch considering prediction error, its uncertainty is expressed partly according to fuzzy theory, but the selection of fuzzy degree is restricted by human subjectivity, which will lead to inevitable deviation, and its subjective deviation will lead to The calculation of the energy supply end is inaccurate, and there will be a certain deviation after combining the economic dispatch of the power grid

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