||In the microgrid, Power supply voltage occur voltage sag or a swell due to energy instability or other external factors, or even a more serious power quality problem. Therefore, the serial active power filter can be used to improve these problems.Serial active power filter main purpose of filter out the interference and accurately compensate the voltage , so that the load voltage can be consistent with that before the interference. Therefore, it is also called the Dynamic Voltage Restorer.The main hardware is constructe in a three-phase four-wire converter, so how to use the calculation method and realize the effect of the series active power filter compensator through the hardware system is a major research focus.|
Through the experimental results of this paper, it is observed that when series active power filter occur voltage sag and other interference,has the compensation of immediacy and accuracy ,so that the load voltage is kept within a reasonable range, load not Power supply interference is affected.
This paper introduces the operation principle and calculation method of the series active power filter, and then verifies the feasibility of the algorithm through the simulation and test platform,and further realizes the hardware system.
 IEEE Recommended Practices and Requirements for Harmonic Control in Electrical Power Systems, IEEE Std 519-2014.
 IEEE Recommended Practice for Monitoring Electric Power Quality, IEEE Std 1159-2009.
 Deepa Francis, Tomson Thomas , “Mitigation of voltage sag and swell using dynamic voltage restorer,” 2014 Annual International Conference on Emerging Research Areas: Magnetics, Machines and Drives (AICERA/iCMMD), Kottayam, India , July 2014.
 V. Ansal, K. Ravikumar, P. Parthiban “Transformerless Dynamic Voltage Restorer for voltage sag mitigation,” Biennial International Conference on Power and Energy Systems: Towards Sustainable Energy, Bangalore, India, Jan. 2016.
 A. Mahmoud, Y. Amr, Tarek, “Dynamic Voltage Restorer (DVR) for Voltage Sag Mitigation,” International Journal on Electrical Engineering and Informatics ‐ Volume 3, Number 1, 2011.
 T. Paulraj, P. Rajkumar, “Voltage Unbalance Mitigation Using Positive Sequence Series Compensator”, IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE), vol.9, Issue 3 Ver. I (May –Jun. 2014), PP 98-103.
 P. Rodriguez, A. Luna, M. Ciobotaru, R. Teodorescu, F. Blaabjerg, “Advanced Grid Synchronization System for Power Converters under Unbalanced and Distorted Operating Conditions,” Annual Conference on IEEE Industrial Electronics, Paris, France, Nov. 2006.
 P. Rodríguez, R. Teodorescu, I. Candela, A. V. Timbus, M. Liserre, F. Blaabjerg, “New positive-sequence voltage detector for grid synchronization of power converters under faulty grid conditions,” IEEE Power Electronics Specialists Conference, Jeju, South Korea, June 2006.
 W. V. Lyon, Application of the Method of SymmetricalComponents, New York: McGraw-Hill, 1937.
 Pedro Rodríguez, Alvaro Luna, Raúl Santiago Muñoz-Aguilar, Ion Etxeberria-Otadui, and Remus Teodorescu , “A Stationary Reference Frame Grid Synchronization System for Three-Phase Grid-Connected Power Converters Under Adverse Grid Conditions,” IEEE Transactions on Power Electronics ‐ vol.27, no.1, pp. 99-112, June 2011.
 A. Khoshkbar Sadigh, K. M. Smedley, “Review of voltage compensation methods in dynamic voltage restorer (DVR),” IEEE Power and Energy Society General Meeting,San Diego, CA, USA, July 2012.
 Santosh Kumar Singh, Sudhir Kumar Srivastava, “Enhancement in power quality using dynamic voltage restorer (DVR) in distribution network,” International Conference on Innovations in Information, Embedded and Communication Systems, Coimbatore, India, March 2017.