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In this paper, single control loop based scheme for regulation of voltage and frequency of Self Excited Induction Generator (SEIG) based stand-alone 3-phase 4-wire renewable energy conversion system under source and balanced/unbalanced load perturbations is presented. The regulation is accomplished by maintaining reactive and active power balance across individual phases of SEIG using a Generalized...
Present work relates to improved operation of a 3-phase matrix converter using simple modulation strategy. A simple approach for input displacement power factor control is described, which can make the matrix converter as a source or sink of controlled reactive power. Novel feature of this investigation is the study relating to parallel operation of two matrix converters, from the point of view of...
Performance evaluation of an isolated wind/hydro electric generation scheme having variable speed 3-phase Self Excited Induction Generator (SEIG) operating in synchronism with a Generalized Impedance Controller (GIC) has been presented in this paper. The GIC is an impedance controlled operation of Pulse-width-modulated voltage source inverter (PWM-VSI). The performance of the SEIG-GIC integrated synchronized...
Poor voltage and frequency regulation under source and load perturbations limit the use of self excited induction generator (SEIG) in isolated and dispersed generation, which can exploit wind/microhydro type renewable energy sources. In the present work, a Generalized Impedance Controller (GIC), which is a pulse-width-modulated voltage-source-inverter with a dc-link battery, is used to regulate both,...
A new scheme for a 4-level Static Compensator (STATCOM) integrating two 2-Level converters, supplying / absorbing reactive power to / from the grid is proposed in this paper. Reduced component count and simpler layout of switches are the attractive features of the proposed topology over the existing diode clamped multilevel converter. Furthermore, less number of dc links and smaller dc link capacitor...
Grid connected unity power factor converters based on one cycle control (OCC) do not require the service of PLL or any other synchronization circuits for interfacing with the utility. As a result, these schemes are becoming increasingly popular. However, as the power handled by the converter increases, the power factor deteriorates. To understand quantitatively the cause of poor power factor while...
Load compensators utilizing the principle of STATCOM are becoming more and more popular. Among the direct and indirect current control techniques, direct current control techniques are more popular as they offer better transient response and higher current control bandwidth. However, the aforementioned techniques require the service of a PLL to generate the current reference template. Presence of...
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