Investigation of transformer less dynamic voltage restorer integrated with grid connected solar photo voltaic system

Abstract

The converter concept may be used in a photovoltaic system to boost newlineefficiency. The recommended design allows for a lift converter with newlineappropriately connected inductors to maximise voltage gain advantage. It has newlineadvantages such as continuous input current, high efficiency, and three newlinewinding coupled inductors, which are typically used to increase voltage gain. newlineSoft switching is a technique that is employed to reduce diode losses and newlinevoltage stress at the switch, as well as to help ensure that reverse recovery newlinediodes do not cause problems. To compensate for voltage sag, voltage swell, newlineand disruption in the single-phase power distribution network, this thesis newlineprovides a three-winding accompanied inductor-based high-gain DC DC newlineconverter provided Transformer less Dynamic Voltage Restorer (TDVR). newlineThe Maximum Power Point Tracking (MPPT) control algorithm is used to newlineextract the maximum power that can be extracted from the PV array. High newlineboosting gain is provided by the cascaded DC DC boost converters that newlineenable the TDVR. Because additional active and passive components are newlineused in the cascaded connection of DC DC converters, efficiency is newlinedecreased. By lowering the number of energy conversion stages and the newlinenumber of passive and active components, the suggested MPPT is intended newlineto increase efficiency. This converter uses a single switch, which is newlineessentially controlled by a process known as Zero Current Switching (ZCS) newlinesince it has diodes in it. Because the proposed converter is used in a single newlinepower switch, there are less losses in switching and voltage stressors, which newlineleads to a better voltage gain and efficiency. A transformer-free, highly newlineefficient DC DC converter is covered in this study in addition to prospects newlinefor renewable energy. newline