New Solution for Photovoltaic Station Collector Line Protection Based on Comprehensive Harmonic Drive

Abstract

A new protection scheme for the collection line of photovoltaic power station based on comprehensive harmonic drive is proposed. Firstly, the harmonic sources and characteristics of the collection line fault in photovoltaic power station are analyzed, and the current harmonics are obtained by fiber optical current transformer (FOCT), and the harmonic characteristic weight is calculated based on the nondominated sorting genetic algorithm Ⅱ (NSGA-Ⅱ) to improve the comprehensive harmonic characteristic of fault current. At the time, the high-order harmonic start-up criterion and the comprehensive harmonic action criterion are constructed. The simulation study is carried out for different fault conditions, and the effectiveness of proposed method is verified.

Keywords

• photovoltaic power station
• collector line
• transient characteristics
• harmonic protection