Design, optimisation and application of a resonant DC link inverter for solar energy systems

Abstract

Purpose -The purpose of this paper is to examine diminish switching losses in a solar energy conversion system in order to utilise the full efficiency of a solar panel. Design/methodology/approach -In this paper, a boost converter and a resonant DC link (RDCL) inverter are controlled by a microcontroller. The maximum power point tracker (MPPT) algorithm implemented for boost converter supplies to track maximum power point of solar panel. The Class D full-bridge resonant inverter (RI) that is considered to be supplied by boost converter is modeled and zero voltage switching operation is performed by controlling the inverter with sinusoidal pulse width modulation (SPWM) control scheme. The control algorithm is managed with a feedback detecting the current of the boost converter and the zero voltage levels of capacitor voltage in the resonant circuit. Findings -There are several control techniques have been proposed to reduce switching losses and harmonic contents in conventional or RDCL inverters. Solar panels are used in low power applications among other renewable energy sources. By considering that the efficiency parameter of an actual solar panels is around 14B17 per cent, the switching losses occurred in energy conversion systems causes the efficiency are reduced. Originality/value -The proposed approach has been decreased the switching power losses owing to resonant DC link inverter while the developed MPPT algorithm provides to generate maximum power. This paper introduces a novel soft switching technique in solar energy applications in order to maximise the possible efficiency.

Review on Current Control Techniques of Grid Connected PWM-VSI Based Distributed Generation

“…In three-phase RDCL soft switched converters with zero voltage switching (ZVS), the process of commutation is limited to only discrete time intervals T , where the value of voltage pulses for dc-link is zero. Hence, designated strategies such as delta modulation (DM) or pulse density modulation (PDM) can be used [101][102][103][104][105][106][107][108].…”

Performance study and evaluation of a solar PV testbed system using LabVIEW

“…Figure 1a can be modifi ed to create Fig. 1b by including the backup generator in parallel to the battery so that the battery system failure condition can be prevented [24]. When sunlight falls on PV-cell, electron-hole pair is generated by the contact of the incident photons on atoms cell.…”

“…When sunlight falls on PV-cell, electron-hole pair is generated by the contact of the incident photons on atoms cell. The electric fi eld twisted by the PV-cell junction sources the electron-hole generated by photons braces to isolate, with the electrons traveling into the n-region of the atom and the holes drifting into the p-region of the atom [24]. Since PV-cell produces DC power so it is necessary to convert that DC power to the AC power so that we can get the varying voltage waveform that can run any kind of signal.…”

Artificial bee colony algorithm based on a new local search approach for parameter estimation of photovoltaic systems

“…An accurate and proper solar PV cell modeling is critical in solar PV energy systems [4,5]. Therefore, it is important to obtain the energy using the PV systems with maximum efficiency [6,7]. Simulation and design calculations of PV systems require that the parameters defining the nonlinear electricity model of solar cells be accurately estimated [8].…”