Invention Grant
- Patent Title: Power systems with inverter input voltage control
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Application No.: US16741259Application Date: 2020-01-13
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Publication No.: US11437823B2Publication Date: 2022-09-06
- Inventor: Xiaolin Mao , Heping Dai , Huibin Zhu , Dianbo Fu
- Applicant: Huawei Digital Power Technologies Co., Ltd.
- Applicant Address: CN Shenzhen
- Assignee: Huawei Digital Power Technologies Co., Ltd.
- Current Assignee: Huawei Digital Power Technologies Co., Ltd.
- Current Assignee Address: CN Shenzhen
- Agency: Vierra Magen Marcus LLP
- Main IPC: H02J3/38
- IPC: H02J3/38 ; H02J7/02 ; H02J1/10 ; H02J13/00

Abstract:
A direct current (DC) bus voltage from a combined output of a plurality of DC power modules is controlled based on an alternating current (AC) voltage of a power grid. The DC bus voltage tracks the AC grid voltage to provide efficient conversion between the DC power sources and the AC grid, even when the amplitude of the AC grid voltage varies. In one example, a variable reference voltage is generated based on a detected AC grid voltage. The reference voltage increases and decreases in proportion to increases and decreases in the AC grid voltage. In this manner, large differences between the bus voltage and the grid voltage are avoided. By closely tracking the two voltages, efficiency in the modulation index for power conversion can be achieved.
Public/Granted literature
- US20200153249A1 POWER SYSTEMS WITH INVERTER INPUT VOLTAGE CONTROL Public/Granted day:2020-05-14
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