Title :
A neutral current electronic compensator
Author :
Verdelho, P. ; Marques, G.D.
Author_Institution :
Seccao de Maquinas Electr. e Electron. de Potencia IST, Lisboa, Portugal
fDate :
31 Aug-4 Sep 1998
Abstract :
This paper presents a neutral current electronic compensator. It is implemented with a four-wire three-phase PWM voltage converter connected to the AC mains with accessible neutral. The AC mains neutral is connected to the middle point of the converter DC side capacitors. The converter AC currents are controlled with a generalised space vector based hysteresis controller in the αβ0 coordinate system. The AC mains neutral currents are determined and injected by the PWM voltage converter. Consumer´s unbalances that may result in a first harmonic neutral current can thus be compensated. Zero sequence harmonic currents caused by single-phase rectifiers and other electronic appliances can also be compensated
Keywords :
PWM power convertors; compensation; electric current control; power system control; power system harmonics; voltage control; αβ0 coordinate system; AC mains neutral; AC mains neutral currents injection; PWM voltage converter; accessible neutral; converter AC currents control; converter DC side capacitors; electronic appliances; first harmonic neutral current; four-wire three-phase PWM voltage converter; generalised space vector based hysteresis controller; neutral current electronic compensator; single-phase rectifiers; zero sequence harmonic currents; Active filters; Analog-digital conversion; Capacitors; Control systems; Power electronics; Power harmonic filters; Pulse width modulation; Pulse width modulation converters; Voltage; Wire;
Conference_Titel :
Industrial Electronics Society, 1998. IECON '98. Proceedings of the 24th Annual Conference of the IEEE
Conference_Location :
Aachen
Print_ISBN :
0-7803-4503-7
DOI :
10.1109/IECON.1998.724201
