Capacitor optimization configuration method based on improved particle swarm optimization

Abstract

The invention relates to a capacitor optimization configuration method based on an improved particle swarm optimization. The method comprises the following steps of S1, establishing a target functionwith improved voltage quality; S2, establishing a target function with reactive compensation reaching the standard; S3, establishing a target function with the total harmonic distortion rate reachingthe standard; S4, establishing a target function of parallel resonance frequency and series resonance frequency; and S5, establishing a multi-objective optimization model, and carrying out optimizingand configuring on the capacitor by adopting a particle swarm algorithm. Under the condition that resonance and voltage fluctuation are considered, the improved particle swarm algorithm is adopted, the inertia coefficient of the system is controlled by means of the method of presenting the linear descent along with the number of iterations, so that the algorithm can have high global searching performance when starting, the vicinity of the global optimum region can be quickly located, and meanwhile, high local searching performance is achieved; the established optimization model is not only applicable to electric power companies, the capacitor optimization configuration method based on an improved particle swarm optimization and other levels of power transmission and distribution managementdepartments, and is also suitable for a large-scale steel plant, a cement plant and other important harmonic source users.

Description

technical field [0001] The invention relates to the technical field of an optimal configuration method for capacitors in a distribution network, in particular to an optimal configuration method for capacitors based on an improved particle swarm algorithm. Background technique [0002] Parallel capacitor bank is a reactive power compensation device commonly used in power supply systems. When there is an impact load and the bus voltage fluctuates greatly, the reactive power compensation effect of the capacitor bank cannot meet the voltage quality requirements; when there is a nonlinear load, the bus bar When the harmonic distortion rate of voltage and current exceeds the specified allowable value, it will cause partial resonance of the capacitor bank, and the overcurrent generated by resonance will damage the capacitor. According to incomplete statistics, the accident rate of capacitor damage due to the formation of parallel resonance between the capacitor bank and the system ...

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Problems solved by technology

[0011] However, the above methods do not consider the capacitors that are prone to series-parallel resonance with the system impedance and load impedance when the capacitors are optimally configured, and the influence of the impact load on the reactive power configuration after the impact load is connected to the distribution network. Expansion and continuous development of power electronics

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