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公开(公告)号：US11855449B2
公开(公告)日：2023-12-26
申请号：US17716483
申请日：2022-04-08
发明人： Kun Wang , Tiansan Lin
摘要： A lightning protection apparatus disposed in a photovoltaic power generation system includes first lightning protection units in a one-to-one correspondence with phase lines at a to-be-protected location in the photovoltaic power generation system and a second lightning protection unit connected in series to the first lightning protection units. A first terminal of each first lightning protection unit is connected to a corresponding to-be-protected phase line, and a second terminal of each first lightning protection unit is connected to a first terminal of the second lightning protection unit. A second terminal of the second lightning protection unit is connected to an earth wire. The second lightning protection unit includes at least one gas discharge tube.
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公开(公告)号：US20220329064A1
公开(公告)日：2022-10-13
申请号：US17716483
申请日：2022-04-08
发明人： Kun Wang , Tiansan Lin
摘要： A lightning protection apparatus disposed in a photovoltaic power generation system includes first lightning protection units in a one-to-one correspondence with phase lines at a to-be-protected location in the photovoltaic power generation system and a second lightning protection unit connected in series to the first lightning protection units. A first terminal of each first lightning protection unit is connected to a corresponding to-be-protected phase line, and a second terminal of each first lightning protection unit is connected to a first terminal of the second lightning protection unit. A second terminal of the second lightning protection unit is connected to an earth wire. The second lightning protection unit includes at least one gas discharge tube.
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公开(公告)号：US12107538B2
公开(公告)日：2024-10-01
申请号：US18328902
申请日：2023-06-05
发明人： Ting Yu , Tiansan Lin , Jieling Tang
摘要： The photovoltaic system includes a first inverter circuit, a second inverter circuit, and a switch circuit. When the switch circuit is in the first state, a first photovoltaic array is connected to the direct current positive bus and the neutral bus through the switch circuit, and a second photovoltaic array is connected to the neutral bus and the direct current negative bus through the switch circuit. When the switch circuit is in the second state, the first photovoltaic array is connected to the neutral bus and the direct current negative bus through the switch circuit, and the second photovoltaic array is connected to the direct current positive bus and the neutral bus through the switch circuit. A potential of the photovoltaic array is changed to prevent a PID effect from occurring when the photovoltaic array is at a negative potential for a long time.
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4.发明公开公开(公告)号：US20240079882A1
公开(公告)日：2024-03-07
申请号：US18507622
申请日：2023-11-13
发明人： Longting Sun , Tiansan Lin , Bo Yu , Yongbing Gao
CPC分类号： H02J3/46 , H02J3/0012 , H02M1/0048 , H02M1/007 , H02M1/008 , H02J2300/24
摘要： This application discloses a photovoltaic power generation system control method, a photovoltaic power generation system, and a switching apparatus, to reduce a loss of the photovoltaic power generation system. The switching apparatus includes: a switching unit, a detection unit, and a controller. The switching unit includes a first output end, a second output end, a first input end connected to each first DC/DC converter in a one-to-one correspondence, and a second input end connected to each second DC/DC converter in a one-to-one correspondence. The first output end is connected to an input end of a first DC/AC converter, and the second output end is connected to an input end of a second DC/AC converter. The detection unit is separately connected to the first DC/AC converter, the second DC/AC converter, a plurality of first DC/DC converters, and a plurality of second DC/DC converters.
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公开(公告)号：US11438026B2
公开(公告)日：2022-09-06
申请号：US17137915
申请日：2020-12-30
发明人： Yongbing Gao , Yanzhong Zhang , Tiansan Lin , Wei Shui , Chen Wang
摘要： An inverter in a power generation system converts a direct current that is input from a direct-current-side device into an alternating current for power supply. The inverter includes a control apparatus and a communications apparatus. The control apparatus controls the inverter to convert the direct current that is input from the direct-current-side device into an alternating current for power supply. The communications apparatus is coupled to the control apparatus, and sends a networking information request signal used to request networking information to the direct-current-side device in the power generation system through a direct-current power line, where a frequency of the networking information request signal is within a first frequency band. The communications apparatus also receives the networking information from the direct-current-side device; and sends a control signal to the direct-current-side device, where a frequency of the control signal is within a second frequency band.
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公开(公告)号：US12095256B2
公开(公告)日：2024-09-17
申请号：US17589316
申请日：2022-01-31
发明人： Fangpo Zhang , Jun Wang , Tiansan Lin , Houjian Xu
CPC分类号： H02H7/1213 , H02M1/32 , H02M3/158
摘要： A fault isolation apparatus includes a controller and a circuit breaker. When the circuit breaker is located on a bus connected to a DC/DC conversion unit, if a voltage collected by a first voltage collection terminal is a negative value, it indicates that input or output of the DC/DC conversion unit is reversely connected. In this case, if the circuit breaker is controlled to be opened, the DC/DC conversion unit can be prevented from being connected in series to other parallel DC/DC conversion units. If a voltage collected by a first voltage collection terminal is low and a current collected by a current collection terminal is large, it indicates that the DC/DC conversion unit is short-circuited. In this case, if the circuit breaker is controlled to be opened, another component connected in series to the DC/DC conversion unit can also be prevented from backfeeding energy to the DC/DC conversion unit.
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公开(公告)号：US11894762B2
公开(公告)日：2024-02-06
申请号：US17670592
申请日：2022-02-14
发明人： Jun Wang , Houjian Xu , Tiansan Lin , Fangpo Zhang
CPC分类号： H02M1/0095 , H02M1/0058 , H02M3/07 , H02M3/158
摘要： A direct current-direct current conversion circuit includes: an input inductor, a first capacitor, a second capacitor, a flying capacitor, a first switch, a second switch, a first inductor, a first diode, a first buffer circuit, a third switch, a fourth switch, a second inductor, a second diode, and a second buffer circuit. A power supply, the input inductor, the first diode, the second diode, the first capacitor, and the second capacitor are sequentially connected in series. A first terminal of the flying capacitor is connected between the first diode and the second diode. A second terminal of the flying capacitor is connected between the first switch and the third switch, and the second terminal of the flying capacitor is further connected between the second switch and the second inductor.
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公开(公告)号：US20230396057A1
公开(公告)日：2023-12-07
申请号：US18452352
申请日：2023-08-18
发明人： Fangpo Zhang , Tiansan Lin , Xiufeng Zhang , Jinxiang Zhan
CPC分类号： H02H7/20 , H02J3/381 , H02S40/36 , H02S50/10 , H02J2300/24
摘要： This application discloses a photovoltaic system, a direct-current combiner box, and a fault isolation method. The photovoltaic system includes a fault isolation circuit and a DC/DC conversion circuit. A first end of the fault isolation circuit is connected to N photovoltaic strings, and a second end of the fault isolation circuit is connected to an input end of the DC/DC conversion circuit. The fault isolation circuit includes a multipole switch, and each group of photovoltaic strings in the N photovoltaic strings is connected to an input end of a power conversion circuit through one pole of switch in the multipole switch. Each group of photovoltaic strings includes at least two photovoltaic strings. When a reverse connection fault occurs in the N photovoltaic strings, the entire multipole switch is turned off in linkage.
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公开(公告)号：US12074563B2
公开(公告)日：2024-08-27
申请号：US17519291
申请日：2021-11-04
发明人： Tiansan Lin , Peng Ju
摘要： Embodiments of this application disclose a design of an inverter and a design of a combiner box, to reduce maintenance costs of a photovoltaic device. According to the inverter or the combiner box provided in the embodiments of this application, when electroluminescence (EL) defect detection is performed on the photovoltaic device, a reverse charging circuit integrated into the inverter or integrated into the combiner box is used to output a direct current to a to-be-tested photovoltaic string of the photovoltaic device. Whether the to-be-tested photovoltaic string has defects is determined based on a light emission status of the to-be-tested photovoltaic string. By using the foregoing designs, maintenance engineers do not need to modify wiring terminals of the photovoltaic device when performing EL defect tests on the photovoltaic device. This helps reduce maintenance costs of the photovoltaic device.
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公开(公告)号：US11811235B2
公开(公告)日：2023-11-07
申请号：US17447485
申请日：2021-09-13
发明人： Minghui Xu , Tiansan Lin , Yongbing Gao
摘要： An inverter apparatus is disclosed in this application, which includes a plurality of protection units and a plurality of inverter units. For any protection unit, when a voltage at an input terminal of the protection unit is greater than a voltage at an output terminal of the protection unit, a path between the input terminal and the output terminal of the protection unit is in a forward conducted state; when the voltage at the output terminal of the protection unit is greater than the voltage at the input terminal voltage of the protection unit, the path between the input terminal and the output terminal of the protection unit is in a reverse cut-off state; and when a control terminal of the protection unit receives a first trigger signal, the path between the input terminal and the output terminal of the protection unit is in a reverse conducted state.
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