Reactive power optimization method based on stochastic load flow with consideration of photovoltaic power generation and harmonic pollution

Abstract

The invention discloses a reactive power optimization method based on a stochastic load flow with consideration of photovoltaic power generation and harmonic pollution, which belongs to the technical field of optimization of electric systems and power distribution systems. The reactive power optimization method based on the stochastic load flow with the consideration of the photovoltaic power generation and the harmonic pollution disclosed by the invention considers multiple stochastic factors in running of a power distribution network such as uncertainty of load fluctuations, failure outage of a generator set and randomness of output of a photovoltaic power station, calculates results of the stochastic load flow through Monte Carlo simulation and then carries out reactive power optimization. During the reactive power optimization, a terminal voltage of a generator, the position of a tapping point of an adjustable transformer, a reactive power compensation amount of an reactive power compensation device, and reactive power capacity of the photovoltaic power station are optimized and controlled by a genetic algorithm, chance constraint is carried out to a fundamental voltage of a system node and a total harmonic distortion rate of a node voltage, and reduction of active power losses and the harmonic pollution is considered comprehensively in order to increase economical efficiency and safety of the running of the power distribution network.

Description

Technical field [0001] The invention relates to a reactive power optimization method based on random power flow that takes into account photovoltaic power generation and harmonic pollution, and belongs to the technical field of power system distribution system optimization. Background technique [0002] As an important distributed power source, photovoltaic power generation accounts for an increasing proportion of installed capacity in the power system, and it has become an unstoppable development trend of new power systems. Because solar photovoltaic power plants are intermittent power sources, they will have a significant impact on the structure and operation of the power distribution system during large-scale grid connection, and the academic and engineering communities in various countries have paid great attention. An accurate component model is the basis for power system simulation analysis. Therefore, establishing an accurate photovoltaic power generation model is the basi...

AI Technical Summary

Problems solved by technology

However, since the reactive power optimization problem is a very complex nonlinear problem with the characteristics of multi-objective, multi-uncertainty, multi-constraint, multi-extreme and discrete, there are still many problems to be solved

[0005] Due to the wide application of nonlinear equipment, the harmonic pollution in the power grid is becoming more and more serious, and the compensation capacitor is easily damaged, and the compensation capacitor will amplify the harmonic component

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