Improved power quality converter for three‐phase grid‐interfaced PV array fed reduced current sensor‐based induction motor drive for water pumping

Abstract

This paper presents a photovoltaic (PV)–grid integrated system feeding an induction motor‐driven water pumping system. The power transfer is controlled by regulating the direct current (DC) link voltage. This system is used for feeding the induction motor‐driven water pump primarily and feeding the utility if the water pumping is not required. The power flow is controlled by a power factor‐corrected Vienna rectifier. The reduction in sensors makes the system cost‐effective. In addition, a flux estimation technique is proposed, which has good DC offset removal capability. The modified space vector modulation (SVM) technique is used for even‐harmonics elimination in grid voltage. Simulated results are validated by test results obtained on a developed prototype under different environmental conditions.

Multipurpose battery‐assisted solar water pumping system for off‐grid applications: design and development

“…A high-pass first-order filter tuned at half the switching frequency is used to filter the harmonics from inverter voltage [30]. To filter the ripples present in the inverter voltage, the time constant R f × C f should be small compared with the time period at the fundamental switching frequency (f = 50 Hz) as [12]…”

“…In recent times, the solar water pumping system (SWPS) is becoming popular over conventional diesel engine-based pumping systems because of its advantages like fuel-free, maintenance-free, and ecofriendly [5,6]. Concerning the present state-of-the-arts, three categories of SWPS solutions exist, viz., stand-alone SWPS [7][8][9], battery-assisted SWPS [10,11], and grid-assisted SWPS [12,13].…”

Design, analysis, and switching losses reduction of hybrid shunt compensator with adaptive control scheme

“…These issues cause malfunctioning of sensitive equipment's, distortions in terminal voltage, overloading of feeders and transformers. The remedial solution for PQ issues by using distribution static compensator is well analyzed and reported in the literature 1,2,3,4 …”

“…The remedial solution for PQ issues by using distribution static compensator is well analyzed and reported in the literature. 1,2,3,4 The performance of shunt compensation depends on dc voltage of the Voltage Source Inverter (VSI) and filter components. 5 In conventional method, the dc voltage is maintained at double the PCC voltage magnitude for better performance.…”

“…Graph between filter current and switching losses in VSI A, for C f =56 μF and B. for C f =336 μF,[1] conventional method,[2] conventional with adaptive dc voltage,[3] Hybrid (LC) with fixed dc voltage,[4] hybrid (LC) with adaptive dc voltage and[5] proposed method with adaptive dc voltageIn case of non-stiff source, voltage harmonics are present in the PCC voltage, then (18) becomes as,…”