Invention Grant
- Patent Title: Method for startup control of photovoltaic inverter, system thereof, and photovoltaic power generation system
- Patent Title (中): 光伏逆变器启动控制方法及其系统及光伏发电系统
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Application No.: US14813727Application Date: 2015-07-30
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Publication No.: US09553503B2Publication Date: 2017-01-24
- Inventor: Xiaoxun Li , Zhiqiang Han , Haoyuan Li , Xiaodong Mei , Touming Wu , Chao He , Yang Song
- Applicant: SUNGROW POWER SUPPLY CO., LTD.
- Applicant Address: CN Hefei
- Assignee: SUNGROW POWER SUPPLY CO., LTD.
- Current Assignee: SUNGROW POWER SUPPLY CO., LTD.
- Current Assignee Address: CN Hefei
- Agency: Conley Rose, P.C.
- Priority: CN201410427714 20140827
- Main IPC: G05F1/56
- IPC: G05F1/56 ; H02M1/36 ; H02J3/38 ; H02S40/32 ; H02M7/44 ; H02S40/42
Abstract:
A method for start control of photovoltaic inverter, a system thereof, and a photovoltaic power generation system are provided. A fan of the photovoltaic inverter is controlled to operate in a case that input voltage of the photovoltaic inverter is greater than a start threshold, and the fan operation is used as a load. Input voltage drop before and after the fan operates is obtained, and in a case that the input voltage drop is less than or equal to a voltage determination threshold, the photovoltaic inverter is controlled to start a grid connection. The voltage determination threshold is changed based on a power determination threshold of the photovoltaic inverter.
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