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1. 发明公开

EP3407156A1 CONTROL APPARATUS AND COMBINER BOX 审中-公开
公开(公告)号：EP3407156A1
公开(公告)日：2018-11-28
申请号：EP18157840.2
申请日：2018-02-21
申请人： Sungrow Power Supply Co., Ltd.
发明人： WANG, Xinyu , XU, Jun , GU, Yilei , GU, Yu
IPC分类号： G05F1/67 , H02S40/34
CPC分类号： H02J3/385 , G05F1/67 , H02S40/34
摘要： A control apparatus and a combiner box are provided. In a case that component maintenance needs to be performed, an optimizer connected to the combiner box is controlled to operate in a safe mode, and a switch-off signal is outputted to disconnect the combiner box from an inverter if an output current of the combiner box is smaller than a threshold. In a case that the maintenance is completed, the optimizer connected to the combiner box is controlled to operate in a maximum power point tracking mode, and the combiner box is connected to the inverter if an input voltage of the combiner box is greater than an output voltage of the combiner box, that is, if an output voltage of a corresponding string increases gradually to a value exceeding a direct current bus voltage.

2. 发明公开

EP3232530A1 CASCADED PHOTOVOLTAIC GRID-CONNECTED INVERTER, CONTROL METHOD AND CONTROL DEVICE FOR THE SAME 有权
标题翻译：级联光伏并网逆变器，其控制方法和控制装置
公开(公告)号：EP3232530A1
公开(公告)日：2017-10-18
申请号：EP17162926.4
申请日：2017-03-24
申请人： Sungrow Power Supply Co., Ltd.
发明人： XU, Jun , ZHAO, Tao , GU, Yilei
IPC分类号： H02J3/38 , H02M7/5387
CPC分类号： H02S40/32 , H01L31/0508 , H02J3/16 , H02J3/383 , H02M1/42 , H02M7/49 , H02S40/36 , Y02B70/12 , Y02E10/563
摘要： Provided are a cascaded photovoltaic grid-connected inverter, a control method and a control device for the same. The method includes: determining whether at least one of inverter units of the cascaded photovoltaic grid-connected inverter is over-modulated; injecting a reactive current to a power grid to make a grid-connected current effective value greater than or equal to 2 * i dcmin , in a case that at least one of the inverter units is over-modulated; determining a voltage U 0 required for grid connection for the cascaded photovoltaic grid-connected inverter corresponding to a current grid-connected current effective value; and adjusting an output active voltage of each of the inverter units according to U jd = P j / P 0 * U 0d , and adjusting an output reactive voltage of each of the inverter units in a case that none of the inverter units is over-modulated.
摘要翻译：本发明提供一种级联光伏并网逆变器及其控制方法和控制装置。该方法包括：确定级联光伏并网逆变器中的至少一个逆变器单元是否过调制; 在逆变器单元中的至少一个过调制的情况下，向电网注入无功电流以使并网电流有效值大于或等于2 * idcmin; 确定当前并网电流有效值对应的级联光伏并网逆变器并网所需的电压U0; 根据Ujd = Pj / P0 * U0d调整每个逆变器单元的输出有功电压，并在没有逆变器单元过调制的情况下调整每个逆变器单元的输出无功电压。

3. 发明公开

EP3288170A1 CASCADED MULTI-LEVEL INVERTER SYSTEM AND MODULATION METHOD THEREOF, AND CONTROLLER 有权
标题翻译：级联多电平逆变器系统及其调制方法，和控制器
公开(公告)号：EP3288170A1
公开(公告)日：2018-02-28
申请号：EP17168463.2
申请日：2017-04-27
申请人： Sungrow Power Supply Co., Ltd.
发明人： XU, Jun , GU, Yu , GU, Yilei
IPC分类号： H02M7/49 , H02M1/42 , H02J3/18 , H02M7/487 , H02M7/483
摘要： A cascaded multi-level inverter system, a modulation method and a controller for the same are provided. The method includes performing a maximum power point tracking control based on a voltage signal and a current signal of each DC source and a voltage signal and a current signal of the power grid obtained by sampling, calculating a first modulation signal for suppressing power imbalance, and outputting the first modulation signal to each inverter unit; and calculating, based on the calculated reactive current instruction value, the calculated active current instruction value, and a current signal of the reactive compensation device obtained by sampling, a second modulation signal for causing an output power factor of the cascaded multi-level inverter system to be 1, and outputting the second modulation signal to the reactive compensation device.
摘要翻译：提供了一种级联多电平逆变器系统，调制方法及其控制器。该方法包括基于每个DC源的电压信号和电流信号以及通过采样获得的电网的电压信号和电流信号执行最大功率点跟踪控制，计算用于抑制功率不平衡的第一调制信号，以及将第一调制信号输出到每个逆变器单元; 以及基于计算出的无功电流指令值，计算所计算的有功电流指令值以及通过采样获得的无功补偿装置的电流信号来计算用于引起级联多电平逆变器系统的输出功率因数的第二调制信号为1，并将第二调制信号输出至无功补偿装置。

4. 发明公开

EP3244523A1 ALTERNATING-CURRENT DIRECT-CURRENT PHOTOVOLTAIC DEVICE 有权
标题翻译：交变电流直流光伏装置
公开(公告)号：EP3244523A1
公开(公告)日：2017-11-15
申请号：EP17163347.2
申请日：2017-03-28
申请人： Sungrow Power Supply Co., Ltd.
发明人： CAO, Renxian , GU, Yilei , GU, Yu , XU, Jun
IPC分类号： H02M3/158 , H02M7/5387 , H02J3/38 , H02M1/10 , H02M1/12 , H02M7/487 , H02M7/5395 , H02M1/00
CPC分类号： H02J3/383 , F21S8/085 , F21S9/03 , F21Y2115/10 , H02M1/10 , H02M1/126 , H02M3/158 , H02M7/44 , H02M7/487 , H02M7/53871 , H02M7/5395 , H02M2001/0077 , H02P7/28 , Y02E10/56
摘要： An AC-DC photovoltaic device is provided, including: a photovoltaic module (100), a direct current side capacitor (C), a DC-PWM power switching circuit (200) and a controller. The direct current side capacitor (C) is connected in parallel with an output terminal of the photovoltaic module (100). An input terminal of the DC-PWM power switching circuit (200) is connected with the output terminal of the photovoltaic module (100). The DC-PWM power switching circuit (200) includes a controllable switch transistor (S1-S4). The controller is configured to output a switch control signal to control a switching state of the controllable switch transistor (S1-S4) in the DC-PWM power switching circuit (200), to control the DC-PWM power switching circuit (200) to output a direct current PWM wave in a case that the switch control signal is a direct current modulation signal, and output an alternating current PWM wave in a case that the switch control signal is an alternating current modulation signal. The AC-DC photovoltaic device can be applied to both direct current power supply occasions and alternating current power supply occasions, thus improving the versatility.
摘要翻译：提供了一种AC-DC光伏器件，包括：光伏模块（100），直流侧电容器（C），DC-PWM功率开关电路（200）和控制器。直流侧电容器（C）与光伏模块（100）的输出端子并联连接。 DC-PWM功率开关电路（200）的输入端与光伏模块（100）的输出端连接。 DC-PWM功率开关电路（200）包括可控开关晶体管（S1-S4）。控制器被配置为输出开关控制信号以控制DC-PWM功率开关电路（200）中的可控开关晶体管（S1-S4）的开关状态，以将DC-PWM功率开关电路（200）控制为在开关控制信号是直流调制信号的情况下输出直流PWM波，并且在开关控制信号是交流调制信号的情况下输出交流PWM波。该AC-DC光伏器件可应用于直流电源场合和交流电源场合，提高了通用性。

5. 发明授权

EP3288170B1 CASCADED MULTI-LEVEL INVERTER SYSTEM AND MODULATION METHOD THEREOF, AND CONTROLLER 有权
公开(公告)号：EP3288170B1
公开(公告)日：2020-09-30
申请号：EP17168463.2
申请日：2017-04-27
申请人： Sungrow Power Supply Co., Ltd.
发明人： XU, Jun , GU, Yu , GU, Yilei
IPC分类号： H02M7/49 , H02J3/18 , H02J3/38 , H02M1/42 , H02M7/487 , H02M7/483

6. 发明公开

EP3550692A1 MEDIUM AND HIGH VOLTAGE ENERGY CONVERSION SYSTEM 无效
公开(公告)号：EP3550692A1
公开(公告)日：2019-10-09
申请号：EP18214856.9
申请日：2018-12-20
申请人： Sungrow Power Supply Co., Ltd.
发明人： WANG, Xinyu , ZHAO, Tao , ZHUANG, Jiacai , XU, Jun , GU, Yilei
IPC分类号： H02J3/38 , H02M7/49 , H02M1/00
摘要： A medium and high voltage energy conversion system is provided. An input terminal of each of high-voltage isolated DC/DC converters in a phase circuit of the system is connected to a common DC bus. Each of the high-voltage isolated DC/DC converters converts, based on an open-loop control strategy or a closed-loop control strategy, a DC input voltage of a cascade module connected to the high-voltage isolated DC/DC converter into an instruction value related to a voltage of the common DC bus. A system controller of the system calculates, based on at least a voltage-current double loop control strategy, a three-phase modulation instruction to be sent to the cascade modules in three phases according to a parameter related to the voltage of the common DC bus, to implement grid-connected control on three phase circuits.

7. 发明公开

EP3913763A1 HIGH-VOLTAGE BATTERY CLUSTER AND OVER-CURRENT PROTECTION CIRCUIT AND SWITCH BOX THEREFOR 审中-公开
公开(公告)号：EP3913763A1
公开(公告)日：2021-11-24
申请号：EP19920623.6
申请日：2019-12-26
申请人： Sungrow Power Supply Co., Ltd.
发明人： ZHOU, Jianjie , CAO, Renxian , GU, Yilei , YANG, Shanming , TONG, Hui , XU, Xiaohu , LI, Jinsheng
IPC分类号： H02J7/00 , H02H7/18
摘要： A high voltage battery cluster, and an overcurrent protection circuit and a switch box of the high voltage battery cluster are provided. The overcurrent protection circuit includes a first fusing module and a second fusing module. Since a withstand current-time curve of the first fusing module is different from a withstand current-time curve of the second fusing module, in a case that an overcurrent fault occurs in a high voltage battery cluster, one fusing module can cause an open circuit in the high voltage battery cluster prior to another fusing module, thereby preventing the high voltage battery cluster from being broken by a large current when an overcurrent fault occurs in the high voltage battery cluster, thus ensuring an electrical safety of the high voltage battery cluster. In addition, compared with the conventional technology, according to the present disclosure, when the overcurrent fault occurs in the high voltage battery cluster, only one fuse module is fused to disconnect the high voltage battery cluster from the circuit, such that a superposition of current change rates caused when two fuses are fused simultaneously in the conventional technology can be avoided, which in turn cause the current change rate in the circuit is lower than a current change rate caused in a case that the two fuses are fused simultaneously in the conventional technology during a whole disconnecting process, thereby reducing a current impulse and a voltage impulse generated in the circuit, thus solving the problem in the conventional technology.

8. 发明公开

EP3236577A1 CASCADED H-BRIDGE INVERTER AND METHOD FOR HANDLING FAULT THEREOF 有权
标题翻译：级联H桥逆变器及其处理故障的方法
公开(公告)号：EP3236577A1
公开(公告)日：2017-10-25
申请号：EP17162910.8
申请日：2017-03-24
申请人： Sungrow Power Supply Co., Ltd.
发明人： XU, Jun , GU, Yilei
IPC分类号： H02M7/49 , H02J3/38 , H02M1/00 , H02M1/32
摘要： A cascaded H-bridge inverter and a method for handling a fault thereof are provided. An output voltage or an output power of each of N solar panels is detected by a controller. In a case that the output voltage of at least one of the N solar panels is lower than a preset voltage, or that the output power of at least one of the N solar panels is lower than a preset power, the controller controls a corresponding switching device to be switched off, and changes a set value of a voltage across a capacitor in the direct current side. Then, the controller controls a corresponding H-bridge module to perform inverting by taking the set value of the voltage across the capacitor in the direct current side as an input value, so that a total output modulation voltage of the cascaded H-bridge inverter meets a preset condition.
摘要翻译：提供了一种级联的H桥逆变器和用于处理故障的方法。 N个太阳能电池板中的每一个的输出电压或输出电力由控制器检测。在N个太阳能电池板中的至少一个的输出电压低于预设电压或N个太阳能电池板中的至少一个的输出功率低于预设功率的情况下，控制器控制相应的开关设备被关断，并且改变直流侧的电容器两端的电压的设定值。然后，控制器控制相应的H桥模块通过将直流侧的电容器两端的电压的设定值作为输入值进行反相，以使得级联的H桥逆变器的总输出调制电压满足预设条件。

9. 发明授权

EP3236577B1 CASCADED H-BRIDGE INVERTER AND METHOD FOR HANDLING FAULT THEREOF 有权
公开(公告)号：EP3236577B1
公开(公告)日：2020-05-13
申请号：EP17162910.8
申请日：2017-03-24
申请人： Sungrow Power Supply Co., Ltd.
发明人： XU, Jun , GU, Yilei
IPC分类号： H02M7/49 , H02J3/38 , H02M1/00 , H02M1/32

10. 发明授权

EP3322064B1 COOPERATIVE CONTROL METHOD AND DEVICE FOR PHOTOVOLTAIC OPTIMIZER AND PHOTOVOLTAIC INVERTER 有权转让
公开(公告)号：EP3322064B1
公开(公告)日：2020-01-15
申请号：EP17168470.7
申请日：2017-04-27
申请人： Sungrow Power Supply Co., Ltd.
发明人： XU, Jun , ZHUANG, Jiacai , GU, Yilei
IPC分类号： H02J3/38 , H02S50/10

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