Grid-tied solar inverters are designed to generate power at unity power factor which means that they can produce active power only. The reactive power requirement of the load is catered by the grid only. As we know that with a sudden increase in the deployment of renewable-based Distributed Energy Resources, reactive power drawn from the grid as compared to active power has been increased considerably. This affects the power quality of the grid. If the grid-tied solar inverter is made smart in terms of supplying reactive power, in addition to active power, the grid has to supply lesser...

Multilevel inverters are a new family of converters for dc-ac conversion for the medium and high voltage and power applications. In this project, two new topologies for the staircase output voltage generations have been proposed with a lesser number of switch requirement. The first topology requires three dc voltage sources and ten switches to synthesize 15 levels across the load. The extension of the first topology has been proposed as the second topology, which consists of four dc voltage sources and 10 switches to achieve 31 levels at the output. Both topologies, apart from having lesser...

Since the potential benefits are resulting from the use of renewable energy sources, Microgrid and Distributed Generation (DG) are becoming a significant research area. Micro grid cangenerally be composed of renewable micro sources placed close to the load Centre. In order tohave control over the real and reactive power of individual DG, Voltage - Frequency control,Power management strategy is required in micro grid. This project presents an investigationabout the impact of integrating renewable energy-based generation sources on the existingdistribution system in terms of load sharing. Also,...

Grid tied solar inverters are designed to generate power at unity power factor which means that they have capability to produce active power only. The reactive power requirement of the load is catered by grid only. With the suddenly increase in the deployment of renewable based Distributed Energy Resources, reactive power drawn from the grid as compared to active power has increased considerably. The objective of this project is to present a local controller of reactive power to comply the new requirements asked by the transmission system operators despite the variation of ambient conditions...

The proposed topology significantly reduces the number of dc voltage sources, switches, IGBTs, and power diodes as the number of output voltage levels increases. To synthesize maximum levels at the output voltage, the proposed topology is optimized for various objectives, such as the minimization of the number of switches, gate driver circuits and capacitors, and blocking voltage on switches. This new type of converter is suitable for high voltage and high-power applications. This multilevel inverter has ability to synthesize waveforms with better harmonics spectrum. In this project a study...

In order to maximize the efficiency of an SPV array and accomplish soft starting of apermanent magnet blushless DC motor, this study deals with a buck-boostconverter driven solar photovoltaic array fed water pumping . Current sensors, which are typically used to regulate the speed of BLDC motor, are entirely removed. A voltage-source inverter's changing DC-link voltage controls the BLDC motor's speed (VSI). This study examines how the interleaved DC-DC converter, which serves as a transitional DC-DC converter between the solar PV array and soft starting of BLDC motors, operates in a solar PV...