太阳能光伏发电系统防反复启停装置

Device for preventing repeated startup and stop of photovoltaic power generating system

Abstract

本发明涉及一种太阳能光伏发电系统防反复启停装置,该装置是一个独立的模块,可以置于太阳能电池板接线盒内,与接线盒一起封装在光伏组件内,也可以并联在太阳能电池板与太阳能光伏发电设备之间的直流母线上,还可以安装在太阳能光伏发电设备内部。本装置能够自动检测太阳能电池板带负载能力,当太阳升起、日落以及阴雨等弱光情况下,太阳能电池板带负载能力较小,防反复启停装置会把太阳能电池板的电压钳位在较低值,避免了太阳能光伏发电系统因太阳能电池板在弱光时过高的开路电压而反复启停;反之,当太阳能电池板带负载能力较大,防反复启停装置自动释放,太阳能光伏发电系统正常工作。
The invention relates to a device for preventing repeated startup and stop of a photovoltaic power generating system. The device for preventing the repeated startup and stop of the photovoltaic power generating system is an independent module, can be put into a junction box of a solar panel, is encapsulated into a photovoltaic assembly together with the junction box, and is connected in parallel with a direction current busbar between a solar panel and photovoltaic power generating equipment and also can be installed inside a photovoltaic power generating equipment. The device for preventing the repeated startup and stop of the photovoltaic power generating system can automatically detect load capacity of the solar panel; under weak-light conditions such as sunrise, sunfall, overcast and rainy days and the like, the load capacity of the solar panel is relatively low, the device for preventing the repeated startup and stop can clamp the voltage of the solar panel at a relatively low value, and the repeated startup and stop of the solar photovoltaic power generating system, caused by overhigh open-circuit voltage in weak light, are avoided; on the contrary, when the load capacity of the solar panel is relatively high, the device for preventing the repeated startup is automatically released and the solar photovoltaic power generating system works normally.

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