CPLD - Based Islanding Detection for Mini Grid Connected Inverter in Renewable Energy

摘要

This paper presents the development of a CPLD - based islanding detection for mini grid connected inverter in renewable energy with very simple under/over voltage and under/over frequency islanding detection algorithms. The system was implemented on a single XC9572 Complex Programmable Logic Device (CPLD) chip using schematic based and VHDL based synthesis model. The CPLD monitor the under/over voltage and under/over frequency of utility grid and processed the value of voltage and frequency for turned on - off relay between mini grid connected inverter and utility grid.