Wind power plant access capability analysis method based on convergence effect

Abstract

The invention discloses a wind power plant access capability analysis method based on a convergence effect. The method comprises the following steps: firstly, constructing a wind power plant penetration power limit calculation model, setting basic information and initial parameters of a power grid system, and randomly generating a control variable initial value and a particle initial speed; secondly, generating initial wind speed sample data by adopting a MonteCarlo simulation method for the output power of the wind power plant group based on a Copula theory, and sorting wind speed samples; then calculating the system power flow of the particles under each wind speed sample; adding opportunity constraints into a fitness function, calculating fitness values of all particles, obtaining an individual optimal value and a global optimal value, and updating speeds and positions of all the particles; and then judging whether the maximum number of iterations is satisfied, if not, returning torecalculate the system power flow of the particles under each wind speed sample, and if so, outputting an optimal decision variable and a wind power penetration limit value. According to the invention, the grid-connected capability of the wind power plant of each access point under the condition of considering the convergence effect of the wind power plant can be effectively calculated.

Description

technical field [0001] The invention belongs to the field of power system planning and optimal dispatching, in particular to a method for analyzing the access capacity of wind farms based on the convergence effect. Background technique [0002] Excessive exploitation of fossil energy has caused a worldwide energy crisis. The current stage of rapid development of new energy sources, wind-to-power conversion technology has become one of the largest, most competitive and most promising power generation methods in the utilization of renewable energy other than hydropower. The large-scale development and utilization of wind energy has played a prominent role in adjusting the energy structure and reducing environmental pollution. [0003] However, due to the inherent randomness, intermittency, volatility and correlation of wind energy, it will have a great impact on the overall characteristics of the power after the collection of wind farms, and the connection of large-scale wind...

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Problems solved by technology

[0004] Since the impact of wind power access on the system involves many factors, the scope is wide, and the analysis and calculation are very complicated, so far there is no unified method to solve the limit of wind power penetration power.

In the existing methods, little consideration is given to the output model of the wind farm side, which cannot reflect the overall characteristics of the wind farm group after gathering, and cannot fully consider the various operating modes of the system and the wind speed conditions of the wind farm

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