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公开(公告)号：US20230344362A1
公开(公告)日：2023-10-26
申请号：US18016353
申请日：2020-09-23
发明人： Jian WU , Biaojie QI , Yongchun YANG , Yuhao LUO
IPC分类号： H02M7/48 , H02M1/08 , H02M7/5387 , H02M1/00
CPC分类号： H02M7/4815 , H02M1/083 , H02M7/53873 , H02M1/0058
摘要： A three-phase inverter and a control method therefor are provided. Resonant capacitors are provided between the midpoints of three bridge arms and the positive and negative poles of a DC bus to constitute resonant units with output inductors, so as to establish a resonant network for the implementation of soft switching, without adding a switching transistor. Compared with the soft-switching of the three-phase inverter in the conventional technology, circuit devices are saved, the control process is simplified, and system hardware and software overheads are reduced. By controlling the three-phase inverter to operate in a continuous mode, the switching loss of the switching transistor and the conduction loss of a flyback diode in the switching transistor are reduced, the conversion efficiency is improved, the electromagnetic noise caused by the switching transistor is reduced, and high-quality grid currents are output.
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公开(公告)号：US20240275172A1
公开(公告)日：2024-08-15
申请号：US18568820
申请日：2021-07-08
发明人： Yuhao LUO , Dongming ZHOU , Fei SHEN , Xuan ZHU , Xiao LU , Guowei MIAO , Wenwei LI
CPC分类号： H02J3/38 , H02J3/001 , H02J3/007 , H02J2300/24
摘要： A method and an apparatus for controlling a shutoff device, and a shutoff device. The method is applied to a processor of the shutoff device. The method includes: determining whether a heartbeat signal is received continuously during a first preset period; if so, controlling the N main switching transistors to be turned on, and determining whether the heartbeat signal is not received continuously during a second preset period; and if so, controlling the N main switching transistors to be turned off, and controlling the release circuit to be turned on to release a voltage on the bus. A release circuit is controlled to release voltage on the bus to the ground, thereby rapidly reducing the voltage on the bus, avoiding person danger and safety accidents caused by the long-term presence of the direct current high voltage on the bus, and improving the safety and reliability of a photovoltaic system.
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公开(公告)号：US20240088833A1
公开(公告)日：2024-03-14
申请号：US18273442
申请日：2022-01-17
发明人： Yuhao LUO , Dongming ZHOU , Xuan ZHU
摘要： Provided is a detection apparatus for a photovoltaic component, including a detection device and a control device. An input terminal of the detection device is connected to an output terminal of the breaking device. The detection device is configured to detect, based on at least one of a voltage and a current outputted from the photovoltaic component, whether the photovoltaic component and a connection circuit for the photovoltaic component operate normally. The control device is connected with the breaking device and the detection device. The control device is configured to control to switch on the breaking device, to transmit the at least one of a voltage and a current outputted from the photovoltaic component to the detection device.
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公开(公告)号：US20240055853A1
公开(公告)日：2024-02-15
申请号：US18266588
申请日：2021-12-09
发明人： Biaojie QI , Yongchun YANG , Yuhao LUO , Jian WU
IPC分类号： H02H7/122
CPC分类号： H02H7/1222 , H02M7/217
摘要： A circuit protection method, system, and apparatus are provided. The method includes: receiving a current between an output terminal of the inverter circuit and a power grid; determining, based on the current, whether a current abnormality occurs; and controlling to switch off switch transistors in the inverter circuit, on determining that a current abnormality occurs.
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5.发明申请公开(公告)号：US20140159763A1
公开(公告)日：2014-06-12
申请号：US14181161
申请日：2014-02-14
发明人： Yuhao LUO , Zhimin LING
CPC分类号： H02J1/00 , G01R31/26 , H02J1/102 , H02J3/385 , H02S10/00 , H02S50/00 , H02S50/10 , Y02E10/58 , Y10T307/549
摘要： This invention provides a solar photovoltaic system, comprising: a plurality of photovoltaic assemblies, for harvesting solar energy to generate DC currents; a plurality of micro-optimizers having input terminals coupled to the photovoltaic assemblies and having output terminals connected in series with each other, for optimizing output currents and/or output voltages of the photovoltaic assemblies, to generate maximum power; a manager configured to communicate with the plurality of micro-optimizers, for managing operating states of the micro-optimizers; and an inverter coupled to one or more strings of the micro-optimizers, for converting the optimized DC currents into AC currents and outputting the AC currents to a power grid. This invention further provides a method for energy harvest optimization and a method for fault detection of a solar photovoltaic system.
摘要翻译： 本发明提供了一种太阳能光伏系统，包括：多个光伏组件，用于收集太阳能以产生直流电流; 多个微型优化器具有耦合到光伏组件的输入端并具有彼此串联连接的输出端，用于优化光伏组件的输出电流和/或输出电压以产生最大功率; 被配置为与所述多个微优化器通信，用于管理所述微优化器的操作状态; 以及耦合到微优化器的一个或多个串的逆变器，用于将优化的DC电流转换成AC电流并将AC电流输出到电网。 本发明还提供一种用于能量收集优化的方法和一种太阳能光伏系统的故障检测方法。
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公开(公告)号：US20240275159A1
公开(公告)日：2024-08-15
申请号：US18568821
申请日：2021-07-08
发明人： Dongming ZHOU , Yuhao LUO , Xiao LU , Fei SHEN , Xuan ZHU
CPC分类号： H02H3/08 , G06F1/30 , H02H1/0007
摘要： A method and an apparatus for controlling a shutoff device, and a shutoff device. The shutoff device includes N main switching transistors and N bypass switching transistors. The method includes: controlling the N main switching transistors to be turned on after receiving a heartbeat signal; determining whether a power supply voltage of a processor is less than a first under-voltage protection voltage; and if so, controlling the N main switching transistors to be turned off, and controlling the N bypass switching transistors to be turned on. Thus, N photovoltaic modules and N main switching transistors corresponding to a shutoff device are separated from multiple photovoltaic module groups, so that the photovoltaic module groups corresponding to other shutoff devices can normally output DC voltage to an inverter, and the inverter can normally output AC power for integration into a power grid, thereby ensuring the normal operation of the photovoltaic system.
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公开(公告)号：US20240039289A1
公开(公告)日：2024-02-01
申请号：US18265946
申请日：2021-12-07
发明人： Yongchun YANG , Guoyong HUA , Biaojie QI , Yuhao LUO
CPC分类号： H02J3/381 , H02J3/46 , H02J2300/24
摘要： A power supply system and a solar photovoltaic inverter, a DC/DC module and a rectification module. Since a power supply outputted from a solar panel is low-voltage power, the power supply at an output end of the solar panel can be directly supplied to a DC driving module and a DC side circuit. Since a power supply outputted from a main transformer is high-voltage power, the AC outputted from the main transformer can be directly supplied to an inverter driving module, a rectification driving module, and an AC side circuit, without additionally providing an auxiliary power supply for high-voltage isolation, namely, without additionally providing a switching circuit, a transformer, a second rectifier module, and a third rectifier module, thereby avoiding the noise and power consumption caused by frequent ON or OFF of the switching circuit, and reducing the cost.
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8.发明申请SOLAR PHOTOVOLTAIC THREE-PHASE MICRO-INVERTER AND A SOLAR PHOTOVOLTAIC GENERATION SYSTEM 有权太阳能三相三相微逆变器和太阳能光伏发电系统公开(公告)号：US20140062198A1
公开(公告)日：2014-03-06
申请号：US14076006
申请日：2013-11-08
发明人： Yuhao LUO
IPC分类号： H02J3/38
CPC分类号： H02J3/38 , H02J3/385 , H02M1/14 , H02M7/4807 , Y02E10/58 , Y10T307/492
摘要： The invention provides a solar photovoltaic three-phase micro-inverter, comprising DC terminals, connected with three DC photovoltaic assemblies for receiving DC; three single-phase inverter circuits, having DC input terminals connected with the DC photovoltaic assemblies via the terminals, for converting the DC to AC; AC terminals, connected with the AC output terminals of the inverter circuits and a three-phase AC power grid, for outputting the AC generated by the inverter circuits; wherein DC input terminals of each inverter circuit are connected in parallel with each other, and AC output terminals are connected with one phase of the three-phase AC power grid and a neutral wire via the AC terminals. The invention further provides a solar photovoltaic generation system. The invention connects DC sides of three single-phase inverter circuits in parallel, which can simply eliminate ripple power at DC side input terminals in a three-phase micro-inverter.
摘要翻译： 本发明提供了一种太阳能光伏三相微逆变器，包括直流端子，与三个用于接收直流的DC光伏组件连接; 三个单相逆变器电路，具有通过端子与DC光伏组件连接的DC输入端，用于将DC转换成AC; 与逆变器电路的交流输出端子连接的交流端子和三相交流电网，用于输出由逆变器电路产生的交流; 其中每个逆变器电路的直流输入端子彼此并联连接，并且AC输出端子通过AC端子与三相交流电网和中性线的一相连接。 本发明还提供了一种太阳能光伏发电系统。 本发明并联三相逆变电路的直流侧，可以简单地消除三相微逆变器直流侧输入端的纹波功率。
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公开(公告)号：US20240275306A1
公开(公告)日：2024-08-15
申请号：US18563421
申请日：2022-04-02
发明人： Dongming ZHOU , Yongchun YANG , Biaojie QI , Yuhao LUO , Kaifeng JIN
IPC分类号： H02M7/5387 , H02M1/12 , H02M1/32
CPC分类号： H02M7/53871 , H02M1/126 , H02M1/32
摘要： A micro-inverter and a grid-tied output control method and device therefor. The micro-inverter comprises an inverter full-bridge circuit and an LC filter circuit. The LC filter circuit is grid-tied to a power grid by means of an output switch. The method comprises: obtaining a voltage amplitude, a frequency, and a phase of a voltage of the power grid by using phase locking; adjusting a power switching transistor driving the inverter full-bridge circuit to cause an output voltage of the micro-inverter to track the voltage of the power grid; and controlling the output switch to be switched on so that the micro-inverter operates normally. In the present application, before the output switch is turned off to grid-tie the micro-inverter, the power grid voltage is phase-locked and the output voltage of the micro-inverter is controlled to track the power grid voltage.
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公开(公告)号：US20240146204A1
公开(公告)日：2024-05-02
申请号：US18279065
申请日：2021-08-02
发明人： Yunjie MO , Yongchun YANG , Biaojie QI , Yuhao LUO
CPC分类号： H02M3/33592 , H02M1/0043 , H02M1/0058 , H02M1/083 , H02M3/01
摘要： A phase-shifted full-bridge converter, and a method and a device for controlling the phase-shifted full-bridge converter are provided. The method includes: acquiring a current currently inputted to the phase-shifted full-bridge converter; determining, based on a correspondence between inputted currents and operation modes, an operation mode corresponding to the current currently inputted to the phase-shifted full-bridge converter; and acquiring, from maximum power point tracking in the determined operation mode, a phase angle for the phase-shifted full-bridge converter and a switching frequency of a switch transistor in the phase-shifted full-bridge converter, to control the switch transistor to operate based on the phase angle and the switching frequency.
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