| Title |
A Study on the Detection of Unbalanced Voltages for Instantaneous Voltage Compensation |
| Authors |
정홍주(Jeong, Hong-Ju) ; 최시영(Choe, Si-Yeong) ; 정준모(Jeong, Jun-Mo) ; 송종환(Song, Jong-Hwan) |
| Keywords |
Dynamic voltage restorer ; positive sequence ; negative sequence ; digital filter ; differential controller |
| Abstract |
This paper presents a new control scheme for a DVR(Dynamic Voltage Restorer) system consisting of series voltage source PWM converters. To control negative sequence component of source voltage the detection of negative sequence is necessary. Generally, filtering process is used tn do that. Through this filtering process has some problems. This paper suggests a new method of separating positive and negative sequences. This control system is designed using differential controllers and digital filters, and positive sequence and negative sequences are controlled respectively. The performance of the presented controller and scheme are confirmed through simulation and actual experiment by 2.5kVA prototype DVR. |