A New Control for Series Compensation of UPQC to Improve Voltage Sag/Swell

Document Type : Research Article

Authors

1 Dept. of Electrical Engineering, Amirkabir University of Technology, Tehran, Iran

2 Dept. of Electrical Engineering, Shahid Ashrafi Esfahani University, Isfahan, Iran

Abstract

Voltage sag/swell is one of the most frequently power quality problems which affects the power systems with sensitive loads. The unified power quality conditioner (UPQC) is capable of mitigating the effect of voltage sag/swell at the load or point of common coupling (PCC). In this paper, a new control of UPQC is proposed based on combining the sag detection and voltage injection established on d-q frame. The voltage sag is detected based on vector control which can immediately discover all of voltage sag in different directions. This method is used the phase-locked loop and positive-negative sequence to detect the sags and the injected voltage in produced by series converter. The proposed UPQC is investigate in two case studies including the different sags/swells in main bus and forward and backward sags in main and load buses. Also proposed control can improve the other power quality phenomena such as voltage and current harmonics and power factor in the main bus. The simulation results show the accuracy the proposed method.

Keywords

References

[1]C. N. Ho and H. S. Chung, “Implementation and performance evaluation of a fast dynamic control scheme for capacitor-supported interline DVR,” IEEE Transactions on Power Electronics, Vol. 25, No. 8, pp. 1975–1988, 2010.
[2]Y. Chen, C. Lin, J. Chen, and P. Cheng, “An inrush mitigation technique of load transformers for the series voltage sag compensator,” IEEE Transactions on Power Electronics, , Vol. 25, No. 8, pp. 2211–2221, 2010.
[3]V. Khadkikar, A. Chandra, “A new control philosophy for a unified power quality conditioner (UPQC) to coordinate load-reactive power demand between shunt and series inverters,” IEEE Transactions Power Delivery, Vol. 23, No. 4, pp. 2522–2534, 2008.
[4]Ch. Mike Barnes, P. Green, Voltage Sag Detection Technique for a Dynamic Voltage Restorer, IEEE Transactions on Industry Applicatios, Vol. 40, No. 1, pp. 2013-201, 2004.
[5]M. Vilathgamuwa, Z. H. Zhang, and S. S. Choi, “Modeling, analysis and control of unified power quality conditioner,” in Proc. IEEE Harmon. Quality Power, 1998, pp. 1035–1040.
[6]M. Gon, H. Liu, H. Gu, and D. Xu, “Active voltage regulator based on novel synchronization method for unbalance and fluctuation compensation,” in Proc. IEEE Ind. Electron. Soc (IECON), Nov. 5–8, pp. 1374–1379, 2002.
[7]M. Torabian Esfahani, B. Vahidi, “A Novel Delay-less Control of Unified Power Quality Conditioner to Enhance Power Quality in Power System “, Electric Power Components and Systems, Vol.42, No. 16, pp.1776-1791, 2014.
[8]W. C. Lee, D. M. Lee, T. K. Lee, “New Control Scheme for a Unified Power-Quality Compensator-Q with Minimum Active Power Injection,” IEEE Trans. Power Del., Vol. 25, No. 2, pp. 1068–1076, 2010.
[9]X. Zhang, W. Zhang, Y. Lv, W. Liu, Q. Wang, “Unified Power Quality Conditioner with Model Predictive Control,” in Proc. 5th International Conference Computer Science Education, pp. 1239–1244, 2010.
[10]K. Kwan, P. So, and Y. Chu, “Unified Power Quality Conditioner for Improving Power Quality Using MVR with Kalman Filters,” in Proc. 7th International Power Engineering Conference, pp. 980–985, 2005.
[11]A.Q. Ansari, B. Singh, M. Hasan, “Algorithm for power angle control to improve power quality in distribution system using unified power quality conditioner”, IET Generation, Transmission & Distribution, Vol. 9, No. 12, pp. 1439 – 1447, 2015.
[12]R.J. Millnitz, M. Mezaroba, “A Simplified Control Technique for a Dual Unified Power Quality Conditioner”, IEEE Transactions on Industrial Electronics, Vol. 61, No. 11, pp. 1435-1627, 2014.
 
AUT Journal of Modeling and Simulation
Volume 49, Issue 1
June 2017
Pages 75-84

Files

Share

How to cite

Statistics