Abstract
This paper proposes a power quality control device based on H-Bridge cascade converter, to solve the problems in current decentralised power quality control, such as huge investment in equipment, expensive operation and maintenance cost, hard to coordinate, and low global technical-economic ratio. It provides a novel for the comprehensive management of power quality in distribution networks. This paper has three parts. In the first part, the topology structure and working principle of the power quality comprehensive control device based on H-Bridge cascade converter are analysed, and its key parameters are analysed and designed. In the second part, corresponding coordinated control strategy is proposed according to the function of power quality comprehensive control device. Finally, a 10kV/1MVA medium-voltage and high-power power quality comprehensive control device is designed. The simulation through MATLAB Simulink proves that the parameter design is correct and the coordinated control strategy is effective.
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