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This paper deals with a unique combination of two inverters those may work as an active power filter (APF) or a STATCOM. Two inverters are switched at different frequencies. The low frequency inverter takes care of the reactive power demand of the system and makes the source current in phase with the voltage, while, the high frequency inverter mostly compensates for the harmonics. In the limiting...
This paper describes a novel design concept of power interfaces connecting distributed generators (DG) to the distribution networks. The proposed power interface is able to perform multiple compensating functions besides regulating the real power fed from DG systems. The hardware structure used in the proposed system is similar to the conventional static synchronous compensator (STATCOM), a converter-based...
As a compromise between economy and good performance, this paper adopts the combined system using active power filter (APF) and static var compensator (SVC) to compensate reactive power and harmonic currents simultaneously. The SVC is constructed by fixed capacitor (FC) and thyristor controlled reactor (TCR), and the APF is constructed by a voltage source converter and its filter reactor. SVC acts...
This paper analyzes distinct digital sensorless control systems used to regulate and to suppress harmonics on the output voltages of a self-excited squirrel-cage induction generator in isolated systems under nonlinear loads. A normalized discrete model of the inverter operated as static VAr compensator and active power filter are presented considering its implementation in a DSP TMS320F2812. Furthermore,...
This paper deals with harmonics and reactive power compensation method by grid-connected Photovoltaic (PV) generation system. The experiment is carried out on the proposed single-stage grid-connected PV generation system, and controlled by digital signal processor TMS320F2812. The experimental results include converter operating features either as active power filter or static synchronous compensator...
This paper analyzes digital sensorless control systems used to regulate and to suppress harmonics on the output voltages of a self-excited squirrel-cage induction generator in isolated systems under nonlinear loads. A normalized discrete model of the inverter operated as static VAr compensator and active power filter are presented considering its implementation in a DSP TMS320F2812. Furthermore, the...
In distribution power system, the unbalanced operating state, harmonics, negative sequence components, which are caused by the nonlinear or unbalanced loads, not only increase the power transmission losses, but also are harmful to the electric devices. In this situation, the Active Power Filter (APF) and the Static Var Generator (SVG) would be required. However as proved in this paper, the existing...
A comprehensive power quality controller combined with Thyristor Controlled Reactors (TCR) and Resonant Impedance Type Hybrid Active Filter (RITHAF) is proposed in this paper for power distribution system. The RITHAF topology presented in the paper is different from the conventional Active Power Filter (APF). The basic of the new RITHAF topology is to add a Fundamental Series Resonance Circuit (FSRC)...
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