Planning annual power balance method considering wind power output characteristics

Abstract

The invention provides a planned annual electric power balancing method taking wind power output characteristics into consideration, which comprises the steps of: counting installed capacity and output of a launched wind power plant at a system maximum load moment, calculating an output percentage of the launched wind power plant at the system maximum load moment, calculating an output percentage mean value of the launched wind power plant at the system maximum load moment, finding out a correlation wind power plant, calculating wind power output correlation coefficient, calculating an output percentage of a planned wind power plant at a planned annual system maximum load moment, calculating output of the planned wind power plant at the planned annual system maximum load moment and acquiring total output of the wind power plants in the planned annual region to obtain a regional electric power profit and loss equation, judging electric power balance according to the equation and the like. The planned annual electric power balancing method takes wind power output at the planned annual system maximum load moment into consideration, makes electric power balancing results more objective and real, and provides guidance for electric power system planning.

Description

technical field [0001] The present invention designs an electric power balance method, specifically, a planned annual electric power balance method that takes wind power output characteristics into consideration. Background technique [0002] Power balance is one of the basic steps in power system planning and a common means to express the relationship between power supply and demand in power systems. Power balance is the first condition that needs to be met in power supply planning, that is, the main constraint condition of power supply planning. In traditional power grid planning, due to the randomness and volatility of wind power, when its installed capacity is small, it does not participate in power balance. [0003] With the in-depth implementation of policies such as energy conservation, emission reduction, and air pollution prevention and control, new energy sources such as wind power have developed rapidly. When wind power develops on a large scale, wind power's pa...

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Problems solved by technology

The literature "Lin Zhangsui, Luo Liqun. Analysis of the characteristics of wind power output in Fujian Province and its impact on the power grid [J]. Electric Power Construction, 2011, 32(12): 18-23" pointed out that wind power has a significant impact on Fujian's power grid in August. The impact of the highest load is very small, pointing out that Fujian wind power will not have an impact on the installed capacity demand of power balance, and the benefit of Fujian wind power capacity is very low

The literature "Fan Fei, Liu Jie, Hu Jie. Analysis of typical power balance methods after large-scale grid-connected wind power in Northeast Power Grid [J]. Electric Power Construction, 2011, 32(12): 18-23" pointed out that based on traditional power balance methods The power grid planning and design can no longer fully and accurately reflect the operating characteristics of the power grid. Combined with the load characteristics of the Northeast power grid, the characteristics of the wind turbines, and the peak-shaving capacity of the wind turbines, the guaranteed output, maximum simultaneous rate, and effective output of wind turbines are used to participate in winter and summer in different ways. Power balance, but did not point out the specific calculation method of guaranteed output, maximum simultaneous rate and effective output

[0004] To sum up, in the published literature, there are few analyzes of wind power participation in power balance in power system planning, and there is no planning annual power balance method that takes wind power output into account.

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