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公开(公告)号：US20230396068A1
公开(公告)日：2023-12-07
申请号：US18453678
申请日：2023-08-22
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Lin Li , Zhiwu Xu , Haibin Guo
CPC classification number: H02J3/38 , H02J3/32 , H02J2300/26
Abstract: A power conversion module includes a power transistor and a sampling control unit. The sampling control unit determines a given duty cycle of the power conversion module based on the bus reference duty cycle, the power supply reference duty cycle, and the current limiting reference duty cycle, and controls, based on the given duty cycle, the power transistor to work, to control the direct current bus to have a target bus voltage and enable the power conversion module to run at the maximum power point. In this application, the direct current bus can be stabilized and the power conversion module can be controlled to run at the maximum power point.
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公开(公告)号：US11837868B2
公开(公告)日：2023-12-05
申请号：US17704120
申请日：2022-03-25
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Xiaoqian Meng , Haibin Guo , Yongbing Gao
CPC classification number: H02J3/381 , H02M7/537 , H02S40/32 , H02J2207/20 , H02J2300/24
Abstract: A photovoltaic system and a leakage current control method for the photovoltaic system includes at least one photovoltaic module group, at least one photovoltaic inverter, a grounded metal frame, and a sampling control unit. The photovoltaic module group is mounted on the grounded metal frame. An output end of the photovoltaic module group is connected to an input end of the photovoltaic inverter, and an output end of the photovoltaic inverter is connected to a power grid. The sampling control unit is coupled to both the photovoltaic module group and the photovoltaic inverter and is configured to detect a current value of a leakage current formed by a common-mode voltage of the photovoltaic inverter on a parasitic capacitor. Herein, the parasitic capacitor exists between the photovoltaic module group and the grounded metal frame.
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公开(公告)号：US20230178989A1
公开(公告)日：2023-06-08
申请号：US18151987
申请日：2023-01-09
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Zhangping Shao , Kai Xin , Haibin Guo
IPC: H02J3/18 , H02M7/66 , H02J3/00 , G05B19/042
CPC classification number: H02J3/18 , G05B19/042 , H02J3/001 , H02M7/66 , G05B2219/2639
Abstract: A current control method and system for a voltage asymmetry fault is disclosed. When a voltage asymmetry fault occurs, a first current limit value is obtained based on a post-fault positive-sequence voltage and a pre-fault positive-sequence reactive current, and a second current limit value is obtained based on a post-fault negative-sequence voltage and a pre-fault negative-sequence voltage. A third current limit value and a fourth current limit value are obtained based on the first current limit value and the second current limit value. A magnitude of a positive-sequence reactive current is limited by using the third current limit value, and a magnitude of a negative-sequence reactive current is limited by using the fourth current limit value.
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公开(公告)号：US12212250B2
公开(公告)日：2025-01-28
申请号：US17867827
申请日：2022-07-19
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Lin Ji , Kai Xin , Haibin Guo
Abstract: A control method of a three-phase multi-level inverter includes: determining a modulation ratio based on output of the three-phase multi-level inverter, where the modulation ratio indicates a ratio of an amplitude value of a sinusoidal modulation wave in pulse width modulation to an amplitude value of a carrier; generating, based on the modulation ratio and a modulation ratio threshold, a common-mode voltage regulation signal for regulating a common-mode voltage in phase voltages of the three-phase multi-level inverter; adding the common-mode voltage regulation signal and a differential-mode voltage regulation signal for regulating a differential-mode voltage in the phase voltages of the three-phase multi-level inverter to obtain a composite regulation signal, where the composite regulation signal is presented as a modulation wave for discontinuous pulse width modulation (DPWM); and generating, based on the composite regulation signal, drive signals for controlling switches of phases of the three-phase multi-level inverter.
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公开(公告)号：US11848623B2
公开(公告)日：2023-12-19
申请号：US17669111
申请日：2022-02-10
Applicant: Huawei Digital Power Technologies Co., Ltd
Inventor： Lin Li , Zhiwu Xu , Haibin Guo
IPC: H02M7/5387 , H02M1/00 , H02J3/38
CPC classification number: H02M7/53871 , H02J3/381 , H02M1/0009 , H02J2300/24 , H02J2300/28
Abstract: A voltage source inverter includes a bus capacitor, a bidirectional power tube, a filter inductor, and a filter capacitor. A voltage control method includes: respectively obtaining a first feedback current and a first feedback voltage from an output end of the filter inductor and an output end of the filter capacitor; obtaining a first duty cycle and a second duty cycle based on the first feedback current, a maximum current reference value, and a minimum current reference value in a current loop; obtaining a third duty cycle based on the first feedback voltage and a voltage reference value in a voltage loop; and selecting one of the first duty cycle, the second duty cycle, and the third duty cycle, and controlling the bidirectional power tube, so that a duty cycle of the bidirectional power tube is between the first duty cycle and the second duty cycle.
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Patent Agency Ranking
公开(公告)号：US20230038257A1
公开(公告)日：2023-02-09
申请号：US17867827
申请日：2022-07-19
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Lin Ji , Kai Xin , Haibin Guo
Abstract: A control method of a three-phase multi-level inverter includes: determining a modulation ratio based on output of the three-phase multi-level inverter, where the modulation ratio indicates a ratio of an amplitude value of a sinusoidal modulation wave in pulse width modulation to an amplitude value of a carrier; generating, based on the modulation ratio and a modulation ratio threshold, a common-mode voltage regulation signal for regulating a common-mode voltage in phase voltages of the three-phase multi-level inverter; adding the common-mode voltage regulation signal and a differential-mode voltage regulation signal for regulating a differential-mode voltage in the phase voltages of the three-phase multi-level inverter to obtain a composite regulation signal, where the composite regulation signal is presented as a modulation wave for discontinuous pulse width modulation (DPWM); and generating, based on the composite regulation signal, drive signals for controlling switches of phases of the three-phase multi-level inverter.
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公开(公告)号：US20240291293A1
公开(公告)日：2024-08-29
申请号：US18612534
申请日：2024-03-21
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Yihong Wu , Haibin Guo , Yifei Zhang , Huajia Li
IPC: H02J7/00 , H01M10/42 , H01M50/204
CPC classification number: H02J7/0019 , H01M10/425 , H01M50/204 , H02J7/0047 , H02J7/00712 , H01M2010/4271
Abstract: The power consumption management circuit receives an activation signal, and controls at least one switch transistor to be turned on, so that the auxiliary source is powered on, and the auxiliary source supplies power to the main control chip. After the auxiliary source is powered on, the main control chip sends a maintenance signal to the power consumption management circuit, and the power consumption management circuit controls at least one switch transistor to be turned on, so that the auxiliary source continuously operates. When determining that an energy equalization requirement is completed or determining that a low power consumption mode needs to be entered, the main control chip sends a cut-off signal to the power consumption management circuit, and the power consumption management circuit controls at least one switch transistor to be turned off, so that the auxiliary source stops operating.
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8.发明授权公开(公告)号：US11977110B2
公开(公告)日：2024-05-07
申请号：US17667297
申请日：2022-02-08
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Haibin Guo , Huan Zhao , Zhiwu Xu , Lin Li
CPC classification number: G01R31/14 , H02M1/0003
Abstract: A converter system includes a plurality of converters, a sampling circuit, and a control circuit. The plurality of converters are connected in parallel. Each converter includes a detection circuit which includes a first switch and at least two resistors. The first switch is connected in parallel with one of the at least two resistors. The control circuit control the sampling circuit to collect a first voltage and a second voltage, where the first voltage is a voltage that is between a second bus and a ground cable and that is collected by the sampling circuit when first switches in detection circuits of a first quantity are in a turn-on state, the second voltage is a voltage that is between the second bus and the ground cable and that is collected by the sampling circuit when first switches in detection circuits of a second quantity are in a turn-on state.
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9.发明公开公开(公告)号：US20240097616A1
公开(公告)日：2024-03-21
申请号：US18523408
申请日：2023-11-29
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Aitang Chen , Zhiwu Xu , Haibin Guo
Abstract: This application provides a photovoltaic energy storage control module and a photovoltaic energy storage control method. A control component included in the photovoltaic energy storage control module can set reference values of bus voltages of a first direct-current converter, a second direct-current converter, and an inverter. Further, the first direct-current converter, the second direct-current converter, and the inverter can automatically adjust a power supply relationship among the first direct-current converter, the second direct-current converter, and the inverter based on a value relationship among the reference values of the bus voltages of the first direct-current converter, the second direct-current converter, and the inverter. In this way, flexibility of the photovoltaic energy storage control module is improved.
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公开(公告)号：US11699905B2
公开(公告)日：2023-07-11
申请号：US17707121
申请日：2022-03-29
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： Hualei Ju , Zhiwu Xu , Haibin Guo
IPC: H02J3/32
CPC classification number: H02J3/32
Abstract: A power system includes a controller, configured to adjust an output current of a first converter to a first current value based on a voltage of a direct current bus and a voltage threshold, where a difference between an adjusted voltage of the direct current bus and the voltage threshold is less than a difference between the unadjusted voltage of the direct current bus and the voltage threshold. The controller adjusts the output current of the first converter to a second current value based on output power of the first converter and a power threshold, where a difference between adjusted output power of the first converter and the power threshold is less than a difference between the unadjusted output power of the first converter and the power threshold. The controller adjusts the output current of the first converter based on the first current value and the second current value.
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