Basic structure and component requirements of photovoltaic power generation system, In the solar photovoltaic power generation system, in order to reduce the number of photovoltaic battery array between te inverter and the attachment, building photovoltaic array, then parallel the corresponding number of pv array power flow access pv junction box, the ark of the dc output for photovoltaic inverter, inverter power grid after booster,
So completed photovoltaic system includes photovoltaic array, pv junction box set, dc cabinet, photovoltaic inverter, step-up transformer and other parts.
The illumination intensity varies in different regions and seasons, as well as the sunlight exposure in the morning and evening. The output voltage of pv array fluctuates within the highest voltage range of the system.
The photovoltaic junction box shall monitor the voltage, current, power, lightning protection and other states of each group of photovoltaic arrays, and realize the fault alarm, positioning, communication and other functions of photovoltaic arrays.
The photovoltaic inverter needs to monitor the voltage and current in the conversion process and drive the control power devices.
Because of pv array output voltage up to 1 kv, common module CHONDA power supply can not directly from the high tension line the way of their work, if the external independent source to multiple pv junction box and inverter monitoring units such as power supply, the working voltage is not stable, system wiring problems, a single bus fault can lead to problems such as the whole monitoring system of power supply to terminate.