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This paper presents a photovoltaic (PV) integrated unified power conditioner (UPC) system that provides power quality enhancement as well as real power sharing. The shunt inverter of the PV integrated UPC system provides compensation for the harmonics present in the source current and reactive power while the series inverter compensates for voltage harmonics, voltage sags and swells. A novel control...
In this paper, the attributes of the nonlinear load like power, power factor, harmonic and interharmonic frequency component, power spectrum and impulse responses are evaluated using correlation coefficients and Estimation of signal parameters via rotational invariance technique. This novel technique is established, also more useful in analyzing nonlinear load and designing the harmonic filters at...
The power quality (PQ) of a system expresses to which degree a practical supply system resembles the ideal supply system. Power quality is an issue that is becoming increasingly important to electricity users at all level of usage. Sensitive equipment and non-linear loads are now more common in industrial, commercial, agricultural and domestic environment. Because of this, a heightened awareness of...
This paper presents a single stage SPV (Solar Photovoltaic) system using an adaptive novel control (ANC) Scheme. The SPV system includes SPV array, VSC (Voltage Source Converter), ripple filter, nonlinear loads and three-phase distribution network. As compared to two stage systems, a single stage SPV system is developed, resulting in depletion in cost, size, weight and an improved efficiency. The...
A novel and computationally efficient method for d-q control of solar photovoltaic (SPV) integrated UPQC (PV-UPQC) is presented in this paper. A digital filter is used to extract fundamental positive sequence (FPS) component of distorted grid voltage which is used to generate the sine and cosine values necessary in d-q based control. The shunt compensator of PV-UPQC compensates for the load side power...
Traditional 2-level voltage source inverter (VSI) based active power filters (APF) has a high DC voltage across the capacitor. A pure APF connected to a 3-ϕ 400V line voltage, will have a DC voltage of more than 600V for its effective working. Active switches in the inverter subjected to this voltage, results in a high voltage stress. Multi-level inverter topology in APF reduces the voltage stress...
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