The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지

Improvement of PLL Method for Voltage Control of Dynamic Voltage Restorer

동적전압보상기의 전압제어를 위한 PLL 방식의 개선

  • 김병섭 (경북대 전기공학과) ;
  • 최종우 (경북대 전자전기컴퓨터학부)
  • Published : 2009.05.01
Download PDF
⟨ Previous Next ⟩

Abstract

Dynamic voltage restorer(DVR) is now more preferable enhancement than other power quality enhancement in industry to reduce the impact of voltage faults, especially voltage sags to sensitive loads. The main controllers for DVR consists of PLL(phase locked loop), compensation voltage calculator and voltage compensator. PLL detects the voltage faults and phase. Compensation voltage calculator calculates the reference voltage from the source voltage and phase. With calculated compensation voltage from PLL, voltage compensator restores the source voltage. If PLL detect ideal phase, compensation voltage calculator calculates ideal compensation voltage. Therefore, PLL for DVR is very important. This paper proposes the new method of PLL in DVR. First, the power circuit of DVR system is analyzed in order to compensate the voltage sags. Based on the analysis, new PLL for improving transient response of DVR is proposed. The proposed method uses band rejection filter(BRF) at q-axis in synchronous flame. In order to calculate compensation voltage in commercial instruments, the PQR theory is used. Proposed PLL method is demonstrated through simulation using Matlab-Simulink and experiment, and by checking load voltage, confirms operation of the DVR

Keywords

References

  1. 이상준, '순간 전압 보상용 직렬 보상기를 위한 새로운 PLL 및 전압 제어기에 관한 연구', 박사학위논문, 2003
  2. 김효성, 이상준, 설승기, 'PQR순시저전력이론에 의한 Dynamic Voltage Restorer의 제어기설계 I - 기준전압 파형의 발생, 전력전자학술대회 논문집, 2003
  3. Chris Fitzer, Mike Barnes, Member, IEEE, and Peter Green, 'Voltage Sag Detection Technique for a Dynamic Voltage Restorer', IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, Vol. 40, NO.1, JANUARY/FEBRUARY 2004 https://doi.org/10.1109/TIA.2003.821801
  4. D. Mahinda Vilathgamuwa, A A D. Ranjith Perera, and S. S. Choi, 'Voltage Sag Compensation With Energy Optimized Dynamic Voltage Restorer', TRANSACTIONS ON POWER DELIVERY, Vol. 18, NO. 3, JULY 2003 https://doi.org/10.1109/TPWRD.2003.813880
  5. 김효성, 이상준, 설승기, 'PQR순시전력이론에 의한 Dynamic Voltage Restorer의 제어기설계 II - 보상전압의 결정, 전력전자학술대회 논문집, 2003
  6. Sang-Joon Lee, Hyosung Kim, Seung-Ki Sul, Frede Blaabjerg, 'A Novel Control Algorithm for Static Series Compensators by Use of PQR Instantaneous Power Theory', IEEE Trans. on Vol. 19, No.3, 2004 https://doi.org/10.1109/TPEL.2004.826499
  7. Mahmda Vilathgamuwa, A.A.D. Ranjith Perera, S.S. Choi and K.J.Tseng, 'CONTROL OF ENERGY OPTIMIZED DYNAMIC Voltage RESTORER', IEEE, 1999
  8. Hyosung Kim, 'Minimal Energy Control for A Dynamic Voltage Restorer', IEEE, 2002 https://doi.org/10.1109/PCC.2002.997556
  9. Hyosung Kim' IEEE, Frede Blaabjerg, IEEE, and Birgitte Bak-Jensen, 'Spectral Analysis of Instantaneous Powers in Single-Phase and Three-Phase Systems With Use of p - q - r Theory', IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol. 17, NO.5, SEPTEMBER 2002 https://doi.org/10.1109/TPEL.2002.802188
  10. Mahinda Vilathgamuwa, A. A. D. Ranjith Perera, and S. S. Choi, 'Performance Improvement of the Dynamic Voltage Restorer With Closed-Loop Load Voltage and Current-Mode Control', IEEE TRANSACTIONS ON POWER ELECTRONICS, Vol. 17, NO.5, SEPTEMBER 2002 https://doi.org/10.1109/TPEL.2002.802189