Patent ID: 11870238
Assignee: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 27:
28. The protection method according to claim 27, wherein a respective protection switch is a rotary direct current switch disconnector or a direct current circuit breaker;
wherein the parameter detection value of the at least one branch is a reverse current value of the at least one branch;
wherein determining that the photovoltaic power generation system is based on the reverse current value of the at least one branch being greater than a first current value; and
wherein controlling at least some of the plurality of protection switches to be disconnected comprises controlling at least some of the plurality of protection switches to be disconnected so that less than three photovoltaic units are connected in parallel or connected to the direct current bus in each branch of the at least one branch.