低压直流断路器在光伏系统的应用分析

Application Analysis of Low Voltage DC Circuit Breaker in Photovoltaic System

从光伏逆变器设备及并网连接方案、不同接地系统的接线方式、时间常数、额定电流与瞬动整定电流等方面详细介绍了低压直流断路器在光伏直流侧的应用。针对光伏电源的非线性问题、多断点直流断路器应用在高直流电压系统问题,提出方案,并建议开发光伏专用直流低压电器产品。

From the photovoltaic grid-connected inverter equipment and scheme,connection modes of different grounding systems,time constant,rated current and instantaneous current setting etc.,the application of low voltage DC circuit breaker in photovoltaic DC side was introduced. In view of the nonlinear problem of the photovoltaic power supply,the problem of the multi break point DC circuit breaker applied in high DC voltage system,the scheme was put forward and the development of photovoltaic special DC low voltage electrical products was proposed.