Multi-objective optimization method for hybrid active power filter

Abstract

The invention discloses a multi-objective optimization method for a hybrid active power filter. The method comprises the following steps: analyzing the relationship between all elements of an active leg and a passive leg of the hybrid active power filter and a system impedance, and the coupling relationship between all the elements of the active leg and the passive leg so as to obtain a first class constraint condition; acquiring a performance, cost and loss model of the filter; setting a second class constraint condition according to the specification of the filter; establishing an objective function base on the performance, cost and loss model and combining the first class constraint condition and the second class constraint condition to serve as a constraint condition of the objective function; processing the objective function and the constraint condition thereof to construct a new objective function; and obtaining an optimal solution based on a chaotic algorithm and a multi-objective PSO (Particle Swarm Optimization) algorithm based on Pareto optimal solution. Compared with an optimization algorithm with two objects, the optimization algorithm with three objects formed by establishing a three-dimensional optimization objective function based on the performance, the cost and the loss can enable the optimal solution to obtain a better tradeoff among the three aspects of the performance, the cost and the efficiency.

Description

technical field [0001] The invention relates to the field of power electronics, in particular to a multi-objective optimization method for a hybrid active power filter. Background technique [0002] The wide application of modern power electronic devices has brought serious power quality problems such as reactive power shortage, harmonic pollution and voltage flicker to the power grid. Passive Power Filter (PPF for short) and Active Power Filter (APF for short) can realize harmonic suppression and reactive power compensation, and solve the power quality problem of the power grid. Among them, PPF uses the resonance characteristics of inductors and capacitors to form a harmonic low-impedance branch, which has the advantages of low cost and mature technology, but has the disadvantages that the filtering characteristics depend on the grid parameters, and it is easy to be out of tune and resonant; APF is a kind of The dynamic harmonic suppression and reactive power compensation ...

AI Technical Summary

Problems solved by technology

[0006] However, the above-mentioned optimal design scheme for the HAPF main circuit has the following shortcomings: 1) The coupling relationship between the passive circuit and the active circuit is not considered, 2) The interaction between the electrical components of the main circuit and the control parameters is ignored; 3) The power consumption of the HAPF system is not considered

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