The Open Electrical & Electronic Engineering Journal

2015, 9 : 591-599
Published online 2015 November 11. DOI: 10.2174/1874129001509010591
Publisher ID: TOEEJ-9-591

Optimization Design on Power Filter of TCR Under Asymmetrical Voltage

Ma Wenchuan , Zhitong Li , Chen Daochang , Qi Jiaming , Zhou Qiang and Fang Junlong
College of Electrical and Information, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China.

ABSTRACT

For resolving the problem that power filter cannot work normally because TCR (thyristor controlled reactor) generates extra third harmonic current under asymmetrical voltage, the paper proposes the estimation method of current capacity that TCR generates extra third harmonic current under asymmetrical voltage. Considering extra third harmonic current under asymmetrical voltage, Optimum method based on genetic algorithm is used to design the parameters of power filter. With reactive power compensation and harmonic suppression project of a steel mill as example, the proposed method is simulated by Matlab. Simulation results show optimized power filter can eliminate extra third harmonic current effects under asymmetrical voltage, meet the requirement of reactive power compensation, reduce harmonics current that load injects into system, and guarantee the power filter safe operation under asymmetrical voltage.

Keywords:

Asymmetrical voltage, genetic algorithms, power filter, reactive power compensation.