Multi-target optimization design method based on improved particle swarm optimization algorithm

Abstract

The invention discloses a multi-target optimization design method based on an improved particle swarm optimization algorithm. A multi-target particle swarm optimization algorithm is adopted. An alternating current filter consists of a dual-tuned high-pass, a three-tuned filter and a shunt capacitor. The method comprises the following steps: calculating the reactive power consumption of a converterstation, and determining the total capacity and group capacity of the alternating current filter; determine the type of the filter through frequency spectrum analysis of an alternating current bus other than current harmonics in combination with the economical efficiency; and implementing multi-target optimization by taking the investment cost of the filter and the total harmonic distortion rateof the voltage as target functions. The algorithm uses a secondary storage library of particles to guide respective flight of particles, a mutation operator is introduced to improve the exploratory ability of the algorithm, a fuzzy control method to improve a final non-inferiority set in the storage library, and particles with the best output efficiency are used as the optimal solution. The results show that the method can effectively filter the harmonics generated by the converter station, lowers cost simultaneously, and is efficient and reliable.

Description

technical field [0001] The invention belongs to the field of high-voltage direct current transmission, and in particular relates to an evolutionary multi-objective optimization design for an AC filter under the background of high-voltage direct current transmission. Background technique [0002] In order to reduce the loss of transmission lines and save precious land resources, high voltage direct current transmission (HVDC) technology has been gradually developed. With the continuous maturity of high-power power electronic technology, the advantages of high-voltage DC transmission system in terms of large-capacity and long-distance transmission in terms of economy, stability and flexibility are becoming more and more prominent. However, the high-voltage direct current transmission system will inevitably generate a large number of harmonics during operation, and these harmonics must be suppressed by AC and DC filtering devices. Therefore, whether the design of the filtering...

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Problems solved by technology

The design method of the AC filter of HVDC transmission project adopts traditional theoretical calculation, or adopts the intelligent algorithm of single-objective optimization, which cannot guarantee the performance index and economic index to reach the optimal state at the same time, and fails to realize the AC filter of HVDC transmission project. multi-objective optimization design of

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