Design and modeling PV converter with hysteresis control

Abstract

Solar energy is one of the most widely used renewable energy sources. A power converter is required to match the parameters of PV modules and the load (network). The article features a PV converter with a hysteresis control system, which consists of a boost converter and inverter. The inverter generates a sinusoidal current in the load (network) according to power quality standards. Digital simulation was carried out for two cases, namely: at variable temperature (constant irradiance) and at variable irradiance (constant temperature). In all operating modes, the power consumption was maximum and the output current was sinusoidal. There was developed a control system with hysteresis controllers, which made it possible to ensure high performance, accuracy, electromagnetic compatibility of the output current of the inverter with the network. THD was less than 5% within the entire range of studies. Inverter circuits, which were connected to a four-wire network, provided better current quality results than three-wire ones. This is due to the fact that there is phase interference in three-wire networks. In both cases, efficiency was almost the same and depended on the power of the PV modules.