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公开(公告)号：US11258265B2
公开(公告)日：2022-02-22
申请号：US16780293
申请日：2020-02-03
Applicant: Futurewei Technologies, Inc.
Inventor： Heping Dai , Xiaolin Mao , Dianbo Fu , Huibin Zhu
Abstract: An apparatus includes a four-switch power converter having input terminals coupled to a power source and output terminals coupled to a capacitor, wherein the capacitor is connected in series with the power source, and a common node of the capacitor and the power source is connected to one input terminal of the four-switch power converter.
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公开(公告)号：US20200153249A1
公开(公告)日：2020-05-14
申请号：US16741259
申请日：2020-01-13
Applicant: Futurewei Technologies, Inc.
Inventor： Xiaolin Mao , Heping Dai , Huibin Zhu , Dianbo Fu
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.
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公开(公告)号：US10554050B2
公开(公告)日：2020-02-04
申请号：US15493796
申请日：2017-04-21
Applicant: Futurewei Technologies, Inc.
Inventor： Heping Dai , Xiaolin Mao , Dianbo Fu , Huibin Zhu
Abstract: A method comprises operating a plurality of power optimizers connected in series between two input terminals of an inverter, wherein the plurality of power optimizers are connected to a plurality of solar panels to form a plurality of power modules connected in series, measuring operation parameters of the plurality of the solar panels, calculating a maximum power flow of each solar panel based upon the measuring, determining a mode transition range based upon the maximum power flows of the plurality of solar panels and configuring a first power optimizer to operate in a pass-through mode if a maximum power point tracking (MPPT) current of a first solar panel connected to the first power optimizer is within the mode transition range.
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公开(公告)号：US20180309300A1
公开(公告)日：2018-10-25
申请号：US15493796
申请日：2017-04-21
Applicant: Futurewei Technologies, Inc.
Inventor： Heping Dai , Xiaolin Mao , Dianbo Fu , Huibin Zhu
Abstract: A method comprises operating a plurality of power optimizers connected in series between two input terminals of an inverter, wherein the plurality of power optimizers are connected to a plurality of solar panels to form a plurality of power modules connected in series, measuring operation parameters of the plurality of the solar panels, calculating a maximum power flow of each solar panel based upon the measuring, determining a mode transition range based upon the maximum power flows of the plurality of solar panels and configuring a first power optimizer to operate in a pass-through mode if a maximum power point tracking (MPPT) current of a first solar panel connected to the first power optimizer is within the mode transition range.
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公开(公告)号：US10965126B2
公开(公告)日：2021-03-30
申请号：US15583456
申请日：2017-05-01
Applicant: Futurewei Technologies, Inc.
Inventor： Huibin Zhu , Heping Dai , Xiaolin Mao
Abstract: An apparatus includes a plurality of photovoltaic modules including at least a first and a second photovoltaic module having outputs connected in series by a bus. A voltage detection circuit detects a bus voltage at an output of the bus, to provide an indicator of detected bus voltage to the first photovoltaic module, and to provide the indicator of detected bus voltage to the second photovoltaic module.
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Patent Agency Ranking
公开(公告)号：US20190148947A1
公开(公告)日：2019-05-16
申请号：US15829846
申请日：2017-12-01
Applicant: Futurewei Technologies, Inc.
Inventor： Xiaolin Mao , Heping Dai , Dianbo Fu , Huibin Zhu
IPC: H02J3/38
Abstract: System, device and method for exporting power are provided including at least one AC optimizer with plurality of DC inputs each connecting with respective one of plurality of DC sources, and independent maximum power point tracking (MPPT) performed for each respective DC source to extract power from each DC source for output and coupling to AC grid. When multiple AC optimizers are employed, with each AC optimizer having multiple DC inputs, each DC input can be connected to PV module with independent MPPT function. Since, each AC optimizer can serve multiple PV modules, significant cost saving and efficiencies can be achieved. Optionally, on PV sub-module level, each of the multiple DC inputs can be used as an independent MPPT channel for a PV sub-module cell string.
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公开(公告)号：US20200295570A1
公开(公告)日：2020-09-17
申请号：US16889520
申请日：2020-06-01
Applicant: Futurewei Technologies, Inc.
Inventor： Xiaolin Mao , Heping Dai , Dianbo Fu , Huibin Zhu
Abstract: System, device and method for exporting power are provided including at least one AC optimizer with plurality of DC inputs each connecting with respective one of plurality of DC sources, and independent maximum power point tracking (MPPT) performed for each respective DC source to extract power from each DC source for output and coupling to AC grid. When multiple AC optimizers are employed, with each AC optimizer having multiple DC inputs, each DC input can be connected to PV module with independent MPPT function. Since, each AC optimizer can serve multiple PV modules, significant cost saving and efficiencies can be achieved. Optionally, on PV sub-module level, each of the multiple DC inputs can be used as an independent MPPT channel for a PV sub-module cell string.
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公开(公告)号：US10566908B2
公开(公告)日：2020-02-18
申请号：US16277080
申请日：2019-02-15
Applicant: Futurewei Technologies, Inc.
Inventor： Huibin Zhu , Xiaolin Mao , Heping Dai , Dianbo Fu
Abstract: According to one aspect of the present disclosure, there is provided an apparatus that includes a first power converter stage connected to a first side of a first transformer, and a second power converter stage connected to a first side of a second transformer. The apparatus further includes an interleaved multi-bridge circuit connected to the second side of the first transformer and to the second side of the second transformer. The apparatus further includes a controller that is configured to operate the interleaved multi-bridge circuit in a parallel mode in which the second sides of the first and second transformers are in parallel at a DC terminal of the interleaved multi-bridge circuit and in a series mode in which the second sides of the first and second transformers are in series at the DC terminal.
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公开(公告)号：US10536002B2
公开(公告)日：2020-01-14
申请号：US15594231
申请日：2017-05-12
Applicant: Futurewei Technologies, Inc.
Inventor： Xiaolin Mao , Heping Dai , Huibin Zhu , Dianbo Fu
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.
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公开(公告)号：US20190252988A1
公开(公告)日：2019-08-15
申请号：US16277080
申请日：2019-02-15
Applicant: Futurewei Technologies, Inc.
Inventor： Huibin Zhu , Xiaolin Mao , Heping Dai , Dianbo Fu
Abstract: According to one aspect of the present disclosure, there is provided an apparatus that includes a first power converter stage connected to a first side of a first transformer, and a second power converter stage connected to a first side of a second transformer. The apparatus further includes an interleaved multi-bridge circuit connected to the second side of the first transformer and to the second side of the second transformer. The apparatus further includes a controller that is configured to operate the interleaved multi-bridge circuit in a parallel mode in which the second sides of the first and second transformers are in parallel at a DC terminal of the interleaved multi-bridge circuit and in a series mode in which the second sides of the first and second transformers are in series at the DC terminal.
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