• Viswaprakash Babu
• Dr,S.Sathik Basha
• Dr. Y. Mohamed Shuaib
• R.Srinu

Dynamic voltage restorer (DVR) is one product that can provide improved voltage sag and swell compensation with energy storage integration. Ultra capacitors (UCAP) have low-energy density and high-power density ideal characteristics for compensation of voltage sags and voltage swells, which are both events that require high power for short spans of time. The novel contribution of this paper lies in the integration of rechargeable UCAP-based energy storage into the DVR topology. With this integration, the UCAP-DVR system will have active power capability and will be able to independently compensate temporary voltage sags and swells without relying on the grid to compensate for faults on the grid like in the past. A dynamic voltage restorer-ultra capacitor is a new device for sag mitigation where UCAP is integrated into the dc-link of the DVR through a bidirectional dc-dc converter which helps in providing a stiff dc-link voltage, and the integrated UCAP-DVR system helps in compensating temporary voltage sags and swells, with lower THD. Here we are using PI controller instead of using other controllers. The validity of the proposed configuration is verified by simulations using MATLAB/ Simulink software.

Dynamic voltage restorer, Power Quality, dc-dc converter, dynamic voltage regulator, ultra capacitor

"AN INTEGRATED DYNAMIC VOLTAGE RESTORER-ULTRA CAPACITOR DESIGN FOR IMPROVING POWER QUALITY ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 4, page no.491-497, April-2019, Available :http://www.jetir.org/papers/JETIRAU06071.pdf

"AN INTEGRATED DYNAMIC VOLTAGE RESTORER-ULTRA CAPACITOR DESIGN FOR IMPROVING POWER QUALITY ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 4, page no. pp491-497, April-2019, Available at : http://www.jetir.org/papers/JETIRAU06071.pdf