Patent ID: 11862981
Assignee: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 14:
15. The control method according to claim 14, wherein the photovoltaic system comprises first and second photovoltaic strings, the first photovoltaic string comprising a first plurality of converters, the second photovoltaic string comprising a second plurality of converters, and the method comprises obtaining a limiting proportion of each photovoltaic string based on the preset voltage and the sum of open circuit voltages of each photovoltaic string and further comprises at least one converter in each photovoltaic string setting the voltage limiting value based on the limiting proportion of at least one converter in each photovoltaic string by: sending a limiting proportion of the first photovoltaic string to at least one converter in the first photovoltaic string through power line communication, and sending a limiting proportion of the second photovoltaic string to at least one converter in the second photovoltaic string, so that the at least one converter in the first photovoltaic string sets a corresponding voltage limiting value based on the limiting proportion of the first photovoltaic string, and the at least one converter in the second photovoltaic string sets a corresponding voltage limiting value based on the limiting proportion of the second photovoltaic string.