DC/AC power converter for home scale electricity systems powered by renewable energy

Abstract

Abstract-This paper presents the design of a single phase DC/AC Converter or Inverter for home scale electricity systems powered by renewable energy such as photovoltaic system. The power converter is controlled using a microcontroller. The inverter system is firstly modeled and simulated using SPICE, before we design it. A control software, implementing Sinusoidal Pulse-Width Modulation (SPWM) signal generator, is embedded into the microcontroller. The SPWM signal is implemented with a simple on/off set activation based on a scheduled-time. The time schedule is obtained from simulation. This approach results in a simpler program compared to another approach, where sawtooth and sinusoidal signal are compared to obtain the required SPWM signal. The inverter is tested for different load conditions. Using a few load configuration, the THD varies between 1% to 13% depending on the load types and the resistive values on the loads. The inverter output voltage amplitude is also measured, and it changes due to the load changes. (Abstract)

Low Power Dissipation Filter of Single-phase DC-AC Inverter for Photovoltaic Based Homescale Electric Power System

“…Multilevel inverter output voltage can be guided using PWL (Piecewise -Linear) switching control method, while for single-phase inverter output voltage uses PWM (Pulse Width Modulation) switching control method and SPWM (Sinusoidal Pulse-Width Modulation) switching control method, however the problem of the three controls above is total harmonics distortion (THD). To overcome this problem, passive power filters (PPF) are used [6]. To be able to supply electricity to the load, a solar power-based power generation system, single-phase inverter, is shown in Fig.2.…”

“…7 shows the selected filter topology, which are briefly explained as follows. [6]. The filter serves to reduce current loss.…”

“…The application of this filter is very suitable for three-phase inverters [7]. For more results on this topic, we refer readers to [6,7] and the references therein. We will try to use this filter on single-phase inverters without transformers.…”