Abstract
This study describes the derivation of an analytical model and simulation for the unified series-shunt compensator (USSC) for investigating power quality in power distribution system. The USSC simulation comprises of two 12-pulse inverters which were connected in series and in shunt with the system. A generalized sinusoidal pulse width modulation (SPWM) switching technique was developed in the proposed controller for fast control action of the USSC. Simulations were carried out using the PSCAD/EMTDC electromagnetic transient programs to examine the performance of the USSC model. Simulation results from the proposed model demonstrated the performance of the USSC and its effectiveness for voltage sag compensation, flicker reduction, voltage unbalance mitigation, power flow control and harmonics elimination.
Highlights
Power quality issues have been attracting the attention of researches for decade
Simulations is carried out to illustrate the effectiveness of the unified series-shunt compensator (USSC) as a unified compensator for voltage regulation, voltage sag compensation, voltage flicker reduction and voltage unbalance mitigation, as described below
The two level USSC incorporating 12-pulse series and shunt connected inverters has been modeled in PSCAD/EMTDC program and a new sinusoidal pulse width modulation (SPWM)-based control scheme has been implemented to control the Gate Turn Off (GTO) of the inverters
Summary
Power quality issues have been attracting the attention of researches for decade. The increased concern has lead to measuring power quality variations, studying the characteristics of power disturbances and providing solutions to the power quality problems[1,2]. By using a unified approach of series-shunt compensators, it is possible to compensate for a variety of power quality problems in distribution systems including sag compensation, flicker reduction, unbalance voltage mitigation and power flow control. USSC includes the functions of both series and shunt connected inverters which generates or absorbs reactive power to regulate voltage magnitude and current flow at the ac terminal, respectively[17].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
