분산전원의 Anti-islanding용 수정된 zero-crossing 방식 주파수 검출기법

A frequency measurement based on modified zero-crossing method for anti-islanding detection of distributed generation

This paper proposes a frequency detection method based on an advanced zero-crossing technique. Zero-crossing method for detecting frequency is one of the most widely used methods today. Although it is simple to apply, it requires extra hardware in implementation due to its limitations in accuracy. The proposed method models the error generated during zero crossing linearization and compensated for it in real time which makes it simple and accurate. The validity of the method and its applicability in anti-islanding detection of distributed generators was confirmed through simulation.