MINIMUM DC VOLTAGE TOLERANCE OF 480V

Inverter AC side voltage is high

Inverter AC side voltage is high

According to the requirements of the overvoltage/undervoltage protection on the AC output side of the photovoltaic power grid-connected inverter technical specification (NB/T32004-2018): When the voltage at the AC output end of the inverter exceeds the allowable voltage range of the power grid, the inverter is allowed to disconnect the power supply to the power grid, and a warning signal should be issued when it is disconnected. [pdf]

Hybrid Energy Storage DC Microgrid

Hybrid Energy Storage DC Microgrid

Based on the analysis of the energy storage requirements for the stable operation of the DC microgrid, battery–supercapacitor cascade approach is adopted to form hybrid energy storage system, in a single hybrid energy storage subsystem for battery and supercapacitor and in the microgrid system of different hybrid energy storage subsystem, respectively, and puts forward the corresponding power allocation method to realize the smooth control of the battery current, to reduce the battery charge and discharge times, to prolong the service life of battery and to improve the running stability of the microgrid. [pdf]

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