Title :
Reference current extraction for three-phase four-wire h-bridge DSTATCOM using SOGI-PLL algorithm
Author :
Yada, H.K. ; Murthy, M.S.R.
Author_Institution :
Dept. of Electr. Eng., Jawaharlal Nehru Technol. Univ., Hyderabad, India
Abstract :
In this paper, a new Second Order Generalized Integrator - Phase Locked Loop control algorithm for reactive power compensation, load balancing, harmonic elimination and neutral current compensation is presented. The strategy is proposed for DSTATCOM to function under distorted load conditions and to improve the power quality at the supply mains. This control algorithm extracts the fundamental component of the load currents for estimating the reference currents based on three single-phase SOGI-PLLs. The main objective of the SOGI-PLL is regulating the DC voltage required for compensation. A ripple filter is used in parallel with the source to eliminate high frequency noise. During the design procedure, the effects of load unbalancing and sudden increase/decrease in loads are also taken into account and performance is found satisfactory. The effectiveness of the design is simulated and shown using MATLAB/Simulink.
Keywords :
bridge circuits; harmonics suppression; integrating circuits; neutral currents; phase locked loops; power supply quality; reactive power control; reference circuits; static VAr compensators; voltage control; DC voltage regulation; SOGI-PLL algorithm; distribution static compensator; frequency noise elimination; harmonic elimination; load balancing; neutral current compensation; power quality improvement; reactive power compensation; reference current estimation; reference current extraction; second order generalized integrator phase locked loop control algorithm; three-phase four- wire h-bridge dstatcom; Harmonic analysis; Load management; Phase locked loops; Power harmonic filters; Reactive power; Voltage control; Distribution Static Compensator (DSTATCOM); Load balancing; Phase-Locked Loop (PLL); Power Quality (PQ); Second Order Generalized Integrator (SOGI);
Conference_Titel :
India Conference (INDICON), 2014 Annual IEEE
Conference_Location :
Pune
Print_ISBN :
978-1-4799-5362-2
DOI :
10.1109/INDICON.2014.7030538
