Title :
Grid Interconnection of Renewable Energy Sources at the Distribution Level With Power-Quality Improvement Features
Author :
Singh, Mukhtiar ; Khadkikar, Vinod ; Chandra, Ambrish ; Varma, Rajiv K.
Author_Institution :
Dept. of Electr. Eng., Ecole de Technol. Super., Montreal, QC, Canada
Abstract :
Renewable energy resources (RES) are being increasingly connected in distribution systems utilizing power electronic converters. This paper presents a novel control strategy for achieving maximum benefits from these grid-interfacing inverters when installed in 3-phase 4-wire distribution systems. The inverter is controlled to perform as a multi-function device by incorporating active power filter functionality. The inverter can thus be utilized as: 1) power converter to inject power generated from RES to the grid, and 2) shunt APF to compensate current unbalance, load current harmonics, load reactive power demand and load neutral current. All of these functions may be accomplished either individually or simultaneously. With such a control, the combination of grid-interfacing inverter and the 3-phase 4-wire linear/non-linear unbalanced load at point of common coupling appears as balanced linear load to the grid. This new control concept is demonstrated with extensive MATLAB/Simulink simulation studies and validated through digital signal processor-based laboratory experimental results.
Keywords :
distributed power generation; invertors; power convertors; power distribution control; power grids; power supply quality; power system interconnection; renewable energy sources; Matlab-Simulink; RES; distribution level; grid interconnection; grid-interfacing inverters; load current harmonics; load neutral current; load reactive power demand; power converter; power electronic converters; power filter; power quality improvement features; renewable energy sources; shunt APF; Harmonic analysis; Inverters; Leg; Power system harmonics; Reactive power; Renewable energy resources; Voltage control; Active power filter (APF); distributed generation (DG); distribution system; grid interconnection; power quality (PQ); renewable energy;
Journal_Title :
Power Delivery, IEEE Transactions on
DOI :
10.1109/TPWRD.2010.2081384