Method for optimizing consumption of receiving-end grid under participation of wind power in frequency modulation

Abstract

The invention discloses a method for optimizing the consumption of a receiving-end grid under the participation of wind power in frequency modulation. The method comprises the following steps of firstly, building a receiving-end grid consumption calculation model, setting system information and initial parameters, and randomly generating an initial control variable value and an initial particle speed; calculating out a frequency value of a wind power unit participating in the frequency modulation after the lag time under a certain disturbance according to dynamic power flow; secondly, calculating system power flow of particles under wind speed samples, and judging whether constraints are met or not; thirdly, adding the constraints into a fitness function, calculating fitness values of theparticles, obtaining optimal values and global optimal values of individuals, and updating the speeds and positions of the particles; and fourthly, judging whether the maximum number of iterations ismet or not, if the maximum number of iterations is not met, returning to re-calculate the system power flow of the particles under the wind speed samples, and if the maximum number of iterations is met, outputting an optimal decision variable and a consumption capacity limit value of the receiving-end grid. According to the method, the consumption capacity of the receiving-end grid under the participation of the wind power in the frequency modulation can be effectively calculated.

Description

technical field [0001] The invention belongs to the field of electric power systems and automation thereof, in particular to a receiving-end power grid consumption optimization method in which wind power participates in frequency modulation. Background technique [0002] At present, my country's wind power generation is in a stage of rapid development. Most of the 10-million-kilowatt-scale wind power bases that have been built or are under construction are mostly far away from the central network, often at the edge or end of the power grid, and the corresponding grid structure is relatively weak. And the power structure Relatively simplistic, the large-scale access of wind power will have a great impact on the safe and stable operation of the regional power grid. At the same time, the fluctuation of wind will make the output power of wind farms fluctuate. The proportion of the grid is getting higher and higher, and its influence on the power grid is also gradually expanding fr...

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Problems solved by technology

The disadvantages of this method are: 1) The amount of calculation is very large, and the wind power injection power needs to be manually adjusted, and there is currently no adjustment principle to follow, and the adjustment based on experience is highly subjective, which is not conducive to operation, and the engineering practicability is poor ; 2) Generally, it is only aimed at a specific constraint factor, and it is impossible to comprehensively consider multiple constraints affecting wind power access; 3) It is impossible to fully consider various operating modes of the system and wind speed conditions of the wind farm

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