A Multifunctional Dynamic Voltage Restorer for Power Quality Improvement

Dung Vo Tien, Radomir Gono and Zbigniew Leonowicz
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Dung Vo Tien: Department of Electrical Power Engineering, FEECS, VSB, Technical University of Ostrava, 70800 Ostrava, Czech Republic
Radomir Gono: Department of Electrical Power Engineering, FEECS, VSB, Technical University of Ostrava, 70800 Ostrava, Czech Republic
Zbigniew Leonowicz: Faculty of Electrical Engineering, Wroclaw University of Science and Technology, 50370 Wroclaw, Poland

Energies, 2018, vol. 11, issue 6, 1-17

Abstract: Power quality is a major concern in electrical power systems. The power quality disturbances such as sags, swells, harmonic distortion and other interruptions have an impact on the electrical devices and machines and in severe cases can cause serious damages. Therefore it is necessary to recognize and compensate all types of disturbances at an earliest time to ensure normal and efficient operation of the power system. To solve these problems, many types of power devices are used. At the present time, one of those devices, Dynamic Voltage Restorer (DVR) is the most efficient and effective device used in power distribution systems. In this paper, design and modeling of a new structure and a new control method of multifunctional DVRs for voltage quality correction are presented. The new control method was built in the stationary frame by combining Proportional Resonant controllers and Sequence-Decouple Resonant controllers. The performance of the device and this method under different conditions such as voltage swell, voltage sag due to symmetrical and unsymmetrical short circuit, starting of motors, and voltage distortion are described. Simulation result show the superior capability of the proposed DVR to improve power quality under different operating conditions and the effectiveness of the proposed method. The proposed new DVR controller is able to detect the voltage disturbances and control the converter to inject appropriate voltages independently for each phase and compensate to load voltage through three single-phase transformers.

Keywords: compensation techniques; dynamic voltage restorer; harmonic distortion; power quality; short circuit; voltage sag; voltage swell (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 (7)

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