A Simplified Minimum DC-Link Voltage Control Strategy for Shunt Active Power Filters

Yu Wang, Yuewu Wang, Si-Zhe Chen, Guidong Zhang and Yun Zhang
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Yu Wang: School of Automation, Guangdong University of Technology, Guangzhou 510006, China
Yuewu Wang: School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China
Si-Zhe Chen: School of Automation, Guangdong University of Technology, Guangzhou 510006, China
Guidong Zhang: School of Automation, Guangdong University of Technology, Guangzhou 510006, China
Yun Zhang: School of Automation, Guangdong University of Technology, Guangzhou 510006, China

Energies, 2018, vol. 11, issue 9, 1-14

Abstract: The active power filter (APF) is a popular electrical device to eliminate harmonics in power systems. The rational design and effective control of DC-link capacitor voltage are important for implementing APF functions. In this study, the influences from the DC-link voltage on the APF compensating current characteristic and compensation performance are analyzed, and the reason to maintain DC-link voltage at a minimum value is investigated. On this basis, a simplified minimum DC-link voltage control strategy for APF is proposed. Compared with the existing DC-link voltage control strategies, the minimum DC-link voltage value in proposed strategy is only determined by the grid voltage and modulation ratio, reducing the calculation burden and the implementation difficulty in application, avoiding the interference from external parameters on the compensation effect. Additionally, the reference DC-link voltage varies at different values according to the grid voltage and modulation ratio. A shunt APF prototype is established and the experimental results verify the correctness and effectiveness of the analysis and proposed strategy.

Keywords: active power filter; minimum DC-link voltage; compensating current characteristic; compensation performance; simplified DC-link voltage control strategy (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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