Wind power penetration power limit analysis method based on stochastic optimal power flow

Abstract

The present invention discloses a wind power penetration power limit analysis method based on a stochastic optimal power flow. The method comprises the following steps: establishing a wind power penetration power limit calculation model based on a probabilistic optimal power flow, and setting system information and particle swarm algorithm initial parameter(s); generating control variable initialvalue(s) and particle initial speed(s) randomly; generating wind farm wind speed sample(s) randomly, calculating system power flow(s) of particles under all sample(s), and judging the fact that whether chance constraint(s) are met; adding the chance constraint(s) into a fitness function, calculating fitness value(s) of all particles, obtaining an individual optimal value and a global optimal value, and updating the speed(s) and position(s) of all particles; and judging the fact that whether a maximum iteration number is met, if the maximum iteration number is not met, regenerating the wind farm wind speed sample(s) randomly and calculating, and if the maximum iteration number is met, outputting optimal decision variable(s) and a wind power penetration power limit value. The method can satisfy wind power randomness and power flow equality constraint(s), and thus the wind power integration capability can be calculated directly.

Description

technical field [0001] The invention relates to the technical field of power system operation and control, in particular to a wind power penetration power limit analysis method based on stochastic optimal power flow. Background technique [0002] As a renewable, non-polluting green energy, the large-scale development and utilization of wind energy plays an increasingly prominent role in alleviating the energy crisis, protecting the environment, and promoting sustainable development. The most mature new energy power generation technology with the greatest potential for large-scale development and commercialization. With the country's strong support for renewable energy power generation in terms of policy, my country's wind power construction has also entered a period of rapid development. [0003] However, due to the inherent randomness, intermittency and volatility of wind energy, the connection of large-scale wind power will inevitably have a serious impact on the safe and...

AI Technical Summary

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.

Existing methods are generally only aimed at a specific constraint factor, and cannot comprehensively consider multiple constraints that affect wind power access, and cannot fully consider various operating modes of the system and wind speed conditions of the wind farm.

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