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1.发明公开
公开(公告)号：EP4404406A2
公开(公告)日：2024-07-24
申请号：EP24161043.5
申请日：2021-03-16
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： ZHANG, Xiufeng , ZHANG, Yanzhong
IPC: H02H7/20
CPC classification number: H02J1/10 , H02J2300/2620200101 , H02H3/18 , H02H7/20 , Y02E10/56
Abstract: This application discloses a protection apparatus and a protection method for a photovoltaic power generation system and a photovoltaic power generation system, and relates to the field of photovoltaic power generation technologies. The protection apparatus includes an interface, a protection switch, a direct current bus, and a controller. The apparatus is connected to at least two photovoltaic units by using the interface, the at least two photovoltaic units are coupled to the direct current bus inside the apparatus to form at least two branches, and each branch is connected to at least one photovoltaic unit. The protection switch is configured to disconnect all or some of the photovoltaic units from the direct current bus, to enable a maximum of three photovoltaic units to be directly connected in parallel. The controller is configured to: when determining, based on a parameter detection value of the branch or a parameter detection value of the direct current bus, that the photovoltaic power generation system is faulty, control the protection switch to be open. According to the apparatus, a photovoltaic unit and a line can be effectively protected with a low power loss when the photovoltaic power generation system is faulty.
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公开(公告)号：EP4283815A1
公开(公告)日：2023-11-29
申请号：EP21925240.0
申请日：2021-02-10
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： LIU, Lin , ZHANG, Yanzhong , CHEN, Zhangrui , SHU, Zhenhuan
IPC: H02J3/38
Abstract: Embodiments of this application provide an inverter apparatus and an inverter system. In the inverter apparatus, a direct current output end of an alternating and direct current distribution cabinet is connected to a first direct current input end of an inverter. A first alternating current output end of the inverter is connected to an alternating current input end of the alternating and direct current distribution cabinet, and the alternating and direct current distribution cabinet outputs a converged alternating current. In this way, on-site wiring is simplified, and on-site maintenance is reduced to some extent.
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公开(公告)号：EP4207590A1
公开(公告)日：2023-07-05
申请号：EP21868383.7
申请日：2021-08-18
Applicant: Huawei Digital Power Technologies Co., Ltd. , Spic Qinghai Photovoltaic Industry Innovation Center Co., Ltd.
Inventor： WANG, Jianqiang , MENG, Yuandong , WAN, Song , ZHANG, Yanzhong , CHONG, Feng , FAN, Hualong , HE, Jiajia , HOU, Shaopan , ZHANG, Jie
IPC: H02S50/10
Abstract: A method and an apparatus (400) for performing fault detection, and a photovoltaic power generation system are provided, to increase fault detection efficiency of a photovoltaic module and reduce detection costs. The method includes: controlling, by a power station management system in a preset photovoltaic module order by using an inverter connected to a current to-be-detected photovoltaic module, the current to-be-detected photovoltaic module to be in a target status, and when determining that the current to-be-detected photovoltaic module is in the target status, controlling a mobile image capturing terminal to collect image data of the current to-be-detected photovoltaic module (S201), where the image data is used to detect a fault status of the current to-be-detected photovoltaic module; and when determining that the mobile image capturing terminal obtains the image data of the current to-be-detected photovoltaic module through collection, continuing, by the power station management system, to control, in the preset photovoltaic module order by using an inverter connected to a next to-be-detected photovoltaic module, the next to-be-detected photovoltaic module to be in the target status, until image data of all to-be-detected photovoltaic modules is obtained through collection (S202).
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公开(公告)号：EP4109744A3
公开(公告)日：2023-03-01
申请号：EP22176325.3
申请日：2022-05-31
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： CAO, Zhen , GU, Guilei , ZHOU, Su , CHEN, Dong , SHI, Lei , ZHANG, Yanzhong
IPC: H02S40/34
Abstract: This application provides a photovoltaic module and a photovoltaic system. A power converter box and at least one junction box are integrated on a backplane of the photovoltaic module as a whole, and there is a cable for connecting the power converter and the junction box. In this case, relative to the conventional technology in which a junction box is independent of a power converter, in this application, a length of a cable used when the junction box and the power converter box are taken as a whole is shorter than a length of a cable used in the conventional technology. Alternatively, only the power converter box is integrated into the backplane of the photovoltaic module, and the power converter box has a connection manner such as a solder ribbon and a circuit board cable. In this case, compared with the conventional technology in which a cable is connected to an independently placed power converter, the power converter in this application only needs to establish a connection relationship by using a solder ribbon, a circuit board cable, and the like with low costs, so that production costs are low.
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5.发明公开
公开(公告)号：EP4068548A1
公开(公告)日：2022-10-05
申请号：EP22165350.4
申请日：2022-03-30
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： ZHANG, Xiufeng , ZHANG, Yanzhong
Abstract: Embodiments of this application disclose a direct current power supply system and a related system. The direct current power supply system includes N power supply devices, N triple-pole direct current switches, a positive bus, an M bus, and a negative bus. A positive input terminal of an i th triple-pole direct current switch is coupled to a first output terminal of an i th power supply device, an M input terminal of the i th triple-pole direct current switch is coupled to a second output terminal of the i th power supply device, a negative input terminal of the i th triple-pole direct current switch is coupled to a third output terminal of the i th power supply device, a positive output terminal of the i th triple-pole direct current switch is coupled to the positive bus, an M input terminal of the i th triple-pole direct current switch is coupled to the M bus, and a negative output terminal of the i th triple-pole direct current switch is coupled to the negative bus, wherein i= 1, 2, ..., N. The i th power supply device is configured to provide a direct current. Implementing embodiments of this application can reduce a size of the direct current power supply system.
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Patent Agency Ranking
公开(公告)号：EP3923434A1
公开(公告)日：2021-12-15
申请号：EP20776388.9
申请日：2020-02-19
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： ZHANG, Yanzhong , MENG, Yuandong , CHEN, Baiyu
Abstract: Embodiments of this application disclose an arc detection method for performing protection in an energy storage system, and a related apparatus, to improve accuracy of arc detection in an energy storage system, promptly take an arc extinguishing measure, and reduce a probability of causing a safety hazard. The method in the embodiments of this application includes: A control apparatus obtains an electrical signal at an electrical connection point in an energy storage system. The control apparatus determines a frequency domain amplitude based on a frequency domain characteristic of the electrical signal. When the frequency domain amplitude is greater than a preset amplitude, the control apparatus controls the energy storage system to perform an arc extinguishing and protection operation on the electrical connection point.
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7.发明公开
公开(公告)号：EP4404406A3
公开(公告)日：2025-01-01
申请号：EP24161043.5
申请日：2021-03-16
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： ZHANG, Xiufeng , ZHANG, Yanzhong
Abstract: This application discloses a protection apparatus and a protection method for a photovoltaic power generation system and a photovoltaic power generation system, and relates to the field of photovoltaic power generation technologies. The protection apparatus includes an interface, a protection switch, a direct current bus, and a controller. The apparatus is connected to at least two photovoltaic units by using the interface, the at least two photovoltaic units are coupled to the direct current bus inside the apparatus to form at least two branches, and each branch is connected to at least one photovoltaic unit. The protection switch is configured to disconnect all or some of the photovoltaic units from the direct current bus, to enable a maximum of three photovoltaic units to be directly connected in parallel. The controller is configured to: when determining, based on a parameter detection value of the branch or a parameter detection value of the direct current bus, that the photovoltaic power generation system is faulty, control the protection switch to be open. According to the apparatus, a photovoltaic unit and a line can be effectively protected with a low power loss when the photovoltaic power generation system is faulty.
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公开(公告)号：EP4425746A2
公开(公告)日：2024-09-04
申请号：EP24162226.5
申请日：2020-04-29
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： ZHOU, He , WANG, Zhaohui , WANG, Xun , ZHANG, Yanzhong
IPC: H02J7/35
CPC classification number: H02J7/0013 , H02J7/0018 , H02J7/0024 , H02J7/35 , H02J2300/2420200101 , H02J3/32 , H02J7/0048 , H02J7/005 , H02J7/00712
Abstract: This application provides an energy storage system. The energy storage system includes one or more energy storage unit clusters, and the energy storage unit cluster includes at least two energy storage modules connected in series. The energy storage system further includes a first bus, a second bus, and a centralized monitoring system of the energy storage unit cluster, where the second bus is a direct current bus. The energy storage unit cluster is coupled to the first bus by using a first converter. One energy storage module includes one energy storage element group and one DC/DC converter, and the energy storage element group is coupled to the second bus by using the DC/DC converter. The centralized monitoring system is connected to the energy storage unit cluster through a control bus, and is configured to control a DC/DC converter in any energy storage module in the energy storage unit cluster to output a compensation current to an energy storage element group end or draw a current from an energy storage element group end, so that energy storage element parameters of all energy storage modules are consistent. The energy storage system provided in this application can improve control flexibility of each energy storage module in the energy storage system and enhance management effectiveness of the energy storage system.
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公开(公告)号：EP4358340A1
公开(公告)日：2024-04-24
申请号：EP21949567.8
申请日：2021-07-12
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： ZHANG, Yanzhong , WAN, Song , FANG, Hongmiao
IPC: H02J3/38
Abstract: This application provides a power supply system, a protection method for a power supply system, and a DC/DC converter. The power supply system includes at least one group of power supply modules. The power supply module includes a first string, a first residual current detection circuit, an inverter circuit, and a first controller. The first residual current detection circuit is connected between the first string and an input end of the inverter circuit, and an output end of the inverter circuit is connected to an alternating current power grid. When a first residual current value detected by the first residual current detection circuit is greater than a first preset residual current threshold, the first controller controls the first string to be disconnected from the inverter circuit, or controls the inverter circuit to be disconnected from the alternating current power grid. According to this application, when the first residual current value is greater than the first preset residual current threshold, the power supply module that has a leakage risk in the power supply system can be effectively cut off, to protect the power supply system. The protection manner is flexible and has high applicability.
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10.发明公开
公开(公告)号：EP4339626A2
公开(公告)日：2024-03-20
申请号：EP23200448.1
申请日：2020-02-19
Applicant: Huawei Digital Power Technologies Co., Ltd.
Inventor： ZHANG, Yanzhong , MENG, Yuandong , CHEN, Baiyu
IPC: G01R23/16
Abstract: Embodiments of this application disclose an arc detection method for performing protection in an energy storage system, and a related apparatus, to improve accuracy of arc detection in an energy storage system, promptly take an arc extinguishing measure, and reduce a probability of causing a safety hazard. The method in the embodiments of this application includes: A control apparatus obtains an electrical signal at an electrical connection point in an energy storage system. The control apparatus determines a frequency domain amplitude based on a frequency domain characteristic of the electrical signal. When the frequency domain amplitude is greater than a preset amplitude, the control apparatus controls the energy storage system to perform an arc extinguishing and protection operation on the electrical connection point.
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