Investigation of voltage regulation in grid–connected PV system

Abstract

<p>In the present scenario the power demand on the load side is increasing day by day, so to balance the power demand and power supply various renewable energy comes to picture as the additional source of electricity generation. The power generated by various renewable resources such as solar, wind, tidal energy and geothermal sources is environmentally clean and have a less emission impact. Out of which PV system draws more attention because it generates energy with a much lower level of carbon dioxide emissions. In the proposed work the objective is to investigate the synchronisation of the grid-connected PV system in terms of voltage and frequency. It includes the P-V characteristics under the circumstances of MPPT technique such as perturb & observe (P&O) method can able to track the local maximum point. The proposed inverter is a voltage source H-Bridge inverter which is controlled using a Clarke and Park transformation to drive a controlled current into the grid to maintain the THD value within the standards. As the grid frequency is fluctuating between SRF-PLL is generally used to fix the output frequency and phase of the grid. It also includes with the design of a three-phase H-bridge inverter as an interface between PV system and grid system. The proposed work is designed and simulated in MATLAB SIMULINK 2017b environment.</p>

Autonomous power sharing for AC/DC HMGS using decentralized modified droop method for interlinking converter

“…The fluctuations make a major differs in power quality and also raises a serious issue. To overview this a 3-phase H-bridge converter is designed to study the synchronization [25]. A paper on cost efficient PV generation and battery storage system for a MG is implemented with droop controllers [26].…”

Simulation of adaptive gain control via 2-D lookup table for isolated hybrid micro-grid system

“…Inverters have a technological design, historically. However, these inverters are designed to be deployed in the distribution system [14]. Typically, the most basic electrical circuit involving photovoltaic solar cells is generally one where the current source is parallel with a diode.…”

Injected power control for grid-connected converter based on particle swarm optimization

“…The stationary components are later changed into their equivalent rotational d and q components, synchronized to the supply voltage, using Park's transformation [10]. The phase locked loop (PLL) will trace the phase angle difference between the inverter and grid voltages and set it to zero, as well as a current controller to control the inverter's signals and measure the voltage magnitude that must be synced [11]. The use of a stationary or rotating frame is a typical method of analyzing three-phase systems Figure 2.…”