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公开(公告)号：EP3537557A1
公开(公告)日：2019-09-11
申请号：EP17874121.1
申请日：2017-07-11
发明人： SHAO, Zhangping , XIN, Kai , GUO, Haibin
IPC分类号： H02J3/38
摘要： An inverter anti-islanding control system includes a phase-shift loop (10) and a drive circuit (20). The phase-shift loop (10) includes a first input end (11), a second input end (12), a third input end (13), a fourth input end (14), a first output end (15), and a second output end (16). The drive circuit (20) includes a first input end (21), a second input end (22), a third input end (23), and an output end (24). The first output end (15) of the phase-shift loop (10) is connected to the first input end (21) of the drive circuit (20), and the second output end (16) of the phase-shift loop (10) is connected to the second input end (22) of the drive circuit (20). In the inverter anti-islanding control system, when an inverter is in an island state, a frequency of an inverter alternating current end voltage is deviated to a second frequency by using the phase-shift loop (10), so that the second frequency triggers frequency protection to disconnect the inverter from an electrical network, to be specific, the inverter is out of the island state.
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公开(公告)号：EP3506474A1
公开(公告)日：2019-07-03
申请号：EP18214165.5
申请日：2018-12-19
发明人： LIU, Fangcheng , XIN, Kai , LIU, Yunfeng
IPC分类号： H02M1/12 , H02M7/06 , H03K17/567
摘要： Embodiments of this application disclose a single-phase converter control method and apparatus. The method includes: calculating on a voltage corresponding to a first level output by a single-phase converter, a voltage corresponding to a second level output by the single-phase converter, and a voltage reference value about the voltage corresponding to the first level and the voltage corresponding to the second level, to obtain a common-mode modulated-wave change rate of the single-phase converter, where the first level is a direct-current-side positive-bus level, and the second level is a direct-current-side negative-bus level; calculating on a first-phase initial modulated wave of the single-phase converter, a second-phase initial modulated wave of the single-phase converter, and the common-mode modulated-wave change rate, to obtain a common-mode modulated wave of the single-phase converter; and calculating on the first-phase initial modulated wave, the second-phase initial modulated wave, and the common-mode modulated wave, to obtain a pulse width modulated wave of the single-phase converter. According to the embodiments of this application, a system neutral-point potential balancing capability, a system response speed, and system reliability can be improved.
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公开(公告)号：EP2961048B1
公开(公告)日：2018-03-07
申请号：EP15173247.6
申请日：2015-06-23
发明人： GUO, Haibin , XIN, Kai , LU, Li
IPC分类号： H02M1/00
CPC分类号： H02M7/537 , H02M7/53871 , H02M7/5395 , H02M2001/0032 , H02M2001/0054 , Y02B70/1491 , Y02B70/16
摘要： Embodiments of the present invention disclose an inverter control method, apparatus, and system. The method in the embodiments of the present invention includes: obtaining a frequency distribution curve of an inverter switch according to an output power and an input voltage that are of an inverter; when an area to which the inverter belongs is a first area and the inverter switch works at a second frequency, switching the inverter switch to a first frequency; and when the area to which the inverter belongs is a second area and the inverter switch works at the first frequency, switching the inverter switch to the second frequency. In the embodiments of the present invention, whether a working frequency of an inverter switch needs to be changed is determined according to an output power and an input voltage, which improves control efficiency, thereby effectively improving conversion efficiency of an inverter.
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公开(公告)号：EP4095936A2
公开(公告)日：2022-11-30
申请号：EP22174948.4
申请日：2022-05-23
发明人： WANG, Shuo , XIN, Kai
摘要： This application provides a solar cell, a method for preparing the solar cell, smart glasses, and an electronic device. The solar cell includes a first conductive layer, a second conductive layer, a first conductive lattice, a second conductive layer, and a functional layer. The functional layer is disposed between the first conductive layer and the second conductive layer, the functional layer is configured to absorb light and generate a photocurrent, and both the first conductive layer and the second conductive layer are configured to receive the photocurrent. The first conductive lattice is in contact with a surface that is of the first conductive layer. The second conductive lattice is in contact with the second conductive layer, and the first conductive lattice and the second conductive lattice are configured to output the photocurrent to the target device. This application can mitigate impact of a sheet resistance on cell efficiency.
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公开(公告)号：EP3783765A1
公开(公告)日：2021-02-24
申请号：EP19884384.9
申请日：2019-05-24
发明人： SHI, Rongliang , XIN, Kai , LIU, Yunfeng
IPC分类号： H02J3/38
摘要： This application provides a photovoltaic power system and a control method thereof. The photovoltaic power system includes a DC/AC inverter circuit, N DC/DC converter circuits that are located at a previous stage of the DC/AC inverter circuit and that are respectively connected to photovoltaic strings, and a controller connected to the DC/AC inverter circuit and the N DC/DC converter circuits. The controller is configured to: perform MPPT control on n DC/DC converter circuits, and perform CPG control on (N-n) DC/DC converter circuits. In this application, in the two control manners, a fast and accurate power reserve or limit of a photovoltaic string inverter with any illumination intensity and ambient temperature can be implemented, and fluctuation of a direct current bus voltage and alternating current output power that are of the photovoltaic string inverter can be eliminated. In addition, control on a virtual synchronous generator of the photovoltaic string inverter is implemented, and a lifespan of the photovoltaic string inverter is prolonged, without a need to add an energy storage element.
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公开(公告)号：EP3402142A1
公开(公告)日：2018-11-14
申请号：EP16889007.7
申请日：2016-07-26
发明人： ZENG, Xiaosheng , XIN, Kai , DONG, Xiaowen
IPC分类号： H04L12/801
CPC分类号： H02J3/14 , G06Q30/0206 , H02J2003/143 , H02J2003/146
摘要： Embodiments of the present invention disclose a service control method and a service control apparatus, to precisely adjust load and reduce costs of electricity expenses. The method in the embodiments of the present invention includes: obtaining, by a service control apparatus, a current electricity grid electricity price and a quantity of to-be-executed services; determining an electricity price threshold according to the quantity of the to-be-executed services, where the quantity of the to-be-executed services is positively correlated with the electricity price threshold; and if the current electricity grid electricity price is greater than the electricity price threshold, decreasing, by the service control apparatus, a quantity of services that are about to be executed by a first quantity, and executing a service according to a reduced quantity of services that are about to be executed; or if the current electricity grid electricity price is less than the electricity price threshold, increasing, by the service control apparatus, a quantity of services that are about to be executed by a second quantity, and executing a service according to an increased quantity of services that are about to be executed. The embodiments of the present invention further provide a service control apparatus. By using the embodiments of the present invention, load can be adjusted precisely, and costs of electricity expenses can be reduced.
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公开(公告)号：EP4343857A1
公开(公告)日：2024-03-27
申请号：EP21956366.5
申请日：2021-09-09
发明人： LUO, Qun , WANG, Shuo , SU, Wenming , CHEN, Xiaolian , XIN, Kai , LIU, Yunfeng
IPC分类号： H01L31/0224 , H02J7/35 , G02C11/00
摘要： Embodiments of this application disclose a solar cell component, a manufacturing method thereof, and an electronic device. The solar cell component may include a first electrode, a second electrode, and a light absorption layer. The first electrode includes a first conductive electrode, and the second electrode includes a second conductive electrode. The light absorption layer is located between the first conductive electrode and the second conductive electrode. The first electrode further includes a first bus electrode. The first bus electrode is connected to a periphery of the first conductive electrode, and a sheet resistance of the first bus electrode is less than a sheet resistance of the first conductive electrode. In other words, a sheet resistance of a peripheral region of the first electrode is less than a sheet resistance of a central region of the first electrode. In this way, compared with a case in which a first electrode includes only a single first conductive electrode, a sheet resistance of the first electrode is reduced. After an optical charge is transmitted to the first conductive electrode, the optical charge can be quickly converged to the periphery, thereby reducing a sheet resistance loss caused by long-distance uneven transmission of the optical charge, and facilitating collection of the optical charge. Therefore, optical-to-electrical conversion efficiency of the solar cell component can be improved.
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公开(公告)号：EP4095936A3
公开(公告)日：2022-12-07
申请号：EP22174948.4
申请日：2022-05-23
发明人： WANG, Shuo , XIN, Kai
IPC分类号： H01L51/44 , G02B27/01 , H01L31/0224
摘要： This application provides a solar cell, a method for preparing the solar cell, smart glasses, and an electronic device. The solar cell includes a first conductive layer, a second conductive layer, a first conductive lattice, a second conductive layer, and a functional layer. The functional layer is disposed between the first conductive layer and the second conductive layer, the functional layer is configured to absorb light and generate a photocurrent, and both the first conductive layer and the second conductive layer are configured to receive the photocurrent. The first conductive lattice is in contact with a surface that is of the first conductive layer. The second conductive lattice is in contact with the second conductive layer, and the first conductive lattice and the second conductive lattice are configured to output the photocurrent to the target device. This application can mitigate impact of a sheet resistance on cell efficiency.
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公开(公告)号：EP3764504A1
公开(公告)日：2021-01-13
申请号：EP19819626.3
申请日：2019-02-03
发明人： YU, Xinyu , XIN, Kai , LIU, Fangcheng
IPC分类号： H02J3/38
摘要： This application provides a control method and a controller for a string inverter, an inverter, and an inverter system. The method includes: in an IV curve scanning process, controlling an output power of an inverter circuit to be a specified power reference value, and controlling an output voltage of each non-IV curve scanning DC-DC circuit to be a specified voltage reference value, where the specified power reference value is less than or equal to a sum of input powers of all non-IV curve scanning DC-DC circuits before IV curve scanning, and the specified voltage reference value is greater than or equal to a preset percentage of a maximum value in open-circuit voltages, before the IV curve scanning, of photovoltaic strings connected to all IV curve scanning DC-DC circuits. The inverter circuit is controlled to maintain a constant output power and a constant bus voltage, with no power fluctuation, and each non-IV curve scanning DC-DC circuit continues to output a power. In this way, photovoltaic energy is effectively utilized, and a huge energy yield loss is avoided.
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公开(公告)号：EP3637607A1
公开(公告)日：2020-04-15
申请号：EP17910657.0
申请日：2017-05-25
发明人： LIU, Fangcheng , WANG, Xiongfei , XIN, Kai
IPC分类号： H02M7/23
摘要： This application discloses an apparatus, an inverter system, and a method for synchronizing carriers. The apparatus includes a modulation unit, a current processing unit, and a control unit. The control unit can adjust, based on a change trend between an amplitude of a first harmonic current and an amplitude of a second harmonic current and a change trend between a phase of a first carrier and a phase of a second carrier, a phase of an input carrier input into the modulation unit, to decrease an amplitude of a harmonic current output by an inverter and improve stability of a distributed power supply system. Further, a prior-art problem that impact of a harmonic current on a power supply system cannot be reduced by synchronizing carriers in a process of synchronizing carriers based on a zero sequence current is avoided, thereby improving the stability of the distributed system.
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