Pichai Jintakosonwit

Abstract: This paper presents a fully-digital-controlled shunt active filter for harmonic termination of a power distribution system. The main purpose of the active filter based on voltage detection is not to compensate for current harmonics but to damp out harmonic propagation caused by line inductors and shunt capacitors for power factor correction. However, time and phase delays inherent in digital controllers might lead to unsatisfactory harmonic-damping performance although digital controllers are preferable to analog controllers. This paper deals with the design and implementation of a digital controller for a shunt active filter based on voltage detection. Experimental results obtained from a laboratory system developed in this paper verify the viability and effectiveness of the fully-digital-controlled active filter.

TL;DR: In this paper, the cooperative control of multiple active filters based on voltage detection for harmonic damping throughout a power distribution system is proposed, where the arrangement of a real distribution system would be changed according to system operation, and/or fault conditions.

TL;DR: In this article, the authors proposed automatic gain adjustment in a fully-digital-controlled shunt active filter to damp out harmonic propagation without considering the circuit parameters, which can reduce the compensating currents and losses in the active filter and avoid over-damping performance.

TL;DR: In this article, the authors proposed a new compensation scheme capable of reducing transient voltage fluctuations caused by a phase angle change in the installation bus voltage, which was tested by computer simulation and experimental results.

TL;DR: In this article, automatic gain adjustment in fully-digital-controlled shunt active filters is proposed to make each active filter damp out harmonic propagation without considering the circuit parameters of a real distribution line.