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1. 发明公开

EP4376241A1 GROUND FAULT PROTECTION IN A HIGH RESISTANCE GROUNDING SYSTEM 审中-公开
公开(公告)号：EP4376241A1
公开(公告)日：2024-05-29
申请号：EP23210831.6
申请日：2023-11-20
申请人： ABB SCHWEIZ AG
发明人： KENDZIA III, Thomas Anthony , BOSE, Veerakumar , KALLARACKAL, Liju
IPC分类号： H02H3/16 , H02H11/00 , H02H7/26 , G01R31/52 , H02H3/04 , H02H3/06
CPC分类号： H02H3/162 , H02H3/042 , H02H11/005 , H02H7/26 , H02H3/066 , G01R31/52
摘要： A ground fault protection system includes a power switch including a source-side and a load-side. The power switch is structured to receive a load current from a power source at the source-side and selectively output the load current from the load-side to a load. A first voltage measuring device is structured to measure a first voltage of the source-side while the power switch is not conducting the load current. A second voltage measuring device is structured to measure a second voltage of the load-side while the power switch is not conducting the load current. A controller is structured to determine a source-side-to-ground voltage based on the first voltage, determine a load-side-to-ground voltage based on the second voltage, determine a ground fault is occurring, and determine a direction of the ground fault relative to the power switch.

2. 发明公开

EP4324063A1 TEMPERIERUNGSVORRICHTUNG, SYSTEM MIT TEMPERIERUNGSVORRICHTUNG SOWIE VERFAHREN ZUM ÄNDERN EINES BETRIEBSZUSTANDS EINER ELEKTRONISCHEN KOMPONENTE 审中-实审
公开(公告)号：EP4324063A1
公开(公告)日：2024-02-21
申请号：EP22710278.7
申请日：2022-02-28
申请人： Truma Gerätetechnik GmbH & Co. KG
发明人： STRUCK-SÜßMEIER, Simon , ZIMMERMANN, Lars
IPC分类号： H02H9/00 , H02H11/00 , H02J1/08

3. 发明公开

EP4287503A1 PHOTOVOLTAIC SYSTEM, DIRECT-CURRENT COMBINER BOX AND FAULT ISOLATION METHOD 审中-实审
公开(公告)号：EP4287503A1
公开(公告)日：2023-12-06
申请号：EP21926122.9
申请日：2021-02-20
申请人： Huawei Digital Power Technologies Co., Ltd.
发明人： ZHANG, Fangpo , LIN, Tiansan , ZHANG, Xiufeng , ZHAN, Jinxiang
IPC分类号： H02S40/32 , H02H11/00
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. This reduces complexity of a hardware structure, and reduces costs of the fault isolation circuit.

4. 发明公开

EP4280411A1 RELAY PULL-IN CONTROL METHOD AND CONTROL DEVICE FOR GRID-TIE INVERTER 审中-实审
公开(公告)号：EP4280411A1
公开(公告)日：2023-11-22
申请号：EP21924067.8
申请日：2021-06-10
申请人： Solax Power Network Technology (Zhejiang) Co., Ltd.
发明人： XIAO, Yongli , JIANG, Fei , ZHOU, Yu , KONG, Jian , HOU, Jian
IPC分类号： H02J3/38 , H02M7/48 , H02H11/00 , H02J3/40
摘要： Disclosed in the present invention are a relay pull-in control method for a grid-connected inverter and a control device. The method comprises the following steps: respectively detecting states of voltage of a power grid and a relay, and judging that the voltage of the power grid and the relay are in normal states; then modulating alternating current (AC) output voltage of the inverter according to an amplitude of the voltage of the power grid, so that the amplitude of the AC output voltage is higher than that of the voltage of the power grid; and then sending out a relay pull-in command, respectively detecting real-time values of the voltage of the power grid and the AC output voltage of the inverter, and stopping the operation of the inverter mentioned in the former step when detecting that the above real-time values are equal or a voltage difference is smaller than a threshold value. Thus, large current caused by the inverter at a moment when the relay is pulled in can be effectively reduced, a risk that the inverter is subjected to power grid energy backflow after the relay is pulled in can be avoided, and working stability of the inverter and the relay can be effectively improved; and according to the above method, a voltage control difficulty of the inverter can be effectively reduced through open-loop control.

5. 发明授权

EP3893353B1 BATTERY POLARITY DETERMINATION CIRCUIT, CHARGER, AND ELECTRONIC DEVICE 有权
公开(公告)号：EP3893353B1
公开(公告)日：2023-09-06
申请号：EP19893126.3
申请日：2019-09-20
发明人： KITAMURA, Kenji , MIZOGUCHI, Yasunari , KANOU, Takashi
IPC分类号： H02J7/00 , H01M10/44 , H01M10/48 , H02H11/00 , H01M50/202

6. 发明公开

EP4148931A1 PROTECTION CIRCUIT FOR PREVENTING MISCONNECTION OF INPUT ENDS, AND PHOTOVOLTAIC POWER GENERATION SYSTEM 审中-实审
公开(公告)号：EP4148931A1
公开(公告)日：2023-03-15
申请号：EP20941495.2
申请日：2020-06-15
申请人： Huawei Digital Power Technologies Co., Ltd.
发明人： ZHANG, Xiufeng , ZHANG, Yanzhong , YAN, Guangchao , ZHANG, Fangpo , TIAN, Xiaokang
IPC分类号： H02H11/00
摘要： This application discloses a protection circuit for preventing a misconnection at an input end and a photovoltaic power generation system, and relates to the field of power electronics technologies. The protection circuit includes an input end, a misconnection detection unit, a mechanical interlocking unit, and a switch unit. The input end is configured to connect to an output end of a direct current power supply. A first input end of the misconnection detection unit is connected to a first port of the input end, and a second input end of the misconnection detection unit is connected to a second port of the input end. An output end of the misconnection detection unit is coupled to the mechanical interlocking unit. The mechanical interlocking unit is connected to the switch unit. A first end of the switch unit is configured to connect to the input end, and a second end of the switch unit is configured to connect to a next circuit. The misconnection detection unit is configured to: when connection wires of the first port and the second port are incorrect, control the mechanical interlocking unit to keep the first end of the switch unit and the second end of the switch unit in a disconnected state. When positive and negative poles of a power supply connected to the input end are misconnected, the protection circuit can be used to prevent a circuit from being affected by the misconnection.

7. 发明公开

EP4148510A1 VERFAHREN ZUM ÜBERWACHEN UND STEUERN EINER STROMVERTEILUNG IN EINER ANLAGE 审中-实审
公开(公告)号：EP4148510A1
公开(公告)日：2023-03-15
申请号：EP21195609.9
申请日：2021-09-08
申请人： Siemens Aktiengesellschaft
发明人： Czech, Silvan , Kogard, Markus , Paul, Wolfgang , Schweigert, Harald
IPC分类号： G05B19/042 , G05B23/02 , H02H11/00 , H02J1/00
摘要： Die Erfindung betrifft ein Verfahren zum Überwachen und Steuern einer Stromverteilung in Lastkreisen (L1, L2, L3) einer Anlagensteuerung einer technischen Anlage. Von zumindest einer getakteten Stromversorgungseinheit (NG) wird eine vorgegebene, zumeist konstante Ausgangsspannung (U A ) zur Verfügung gestellt und für eine Energieversorgung der Lasteinheiten auf die Lastkreise (L1, L2, L3) der Anlage aufgeteilt. Weiterhin ist zumindest eine Mehrzahl der Lastkreise (L1, L2, L3) durch eine Schaltereinheit (S1, S2, S3) abgesichert, welche durch eine Steuereinheit (SE) angesteuert wird. Während einer Lernphase wird zumindest in jedem von einer Schaltereinheit (S1, S2, S3) abgesicherten Lastkreis (L1, L2, L3) ein Stromverlauf (il, i2, i3) des vom jeweiligen Lastkreis (L1, L2, L3) aufgenommenen Stroms gemessen (101). Aus dem für den jeweiligen Lastkreis (L1, L2, L3) gemessenen Stromverlauf (il, i2, i3) wird ein signifikantes Stromprofil mit einem zugehörigen Toleranzbereich abgeleitet und dem jeweiligen Lastkreis zugeordnet (102). Während des laufenden Betriebs der Anlage werden von der Steuereinheit (SE) laufend die für die Lastkreise (L1, L2, L3) gemessenen Stromverläufe (il, i2, i3) überwacht (103) und geprüft, ob von der getakteten Stromversorgungseinheit (NG) eine Leistungsfähigkeitsgrenze zumindest erreicht wird (104). Bei Erreichen der Leistungsfähigkeitsgrenze durch die getaktete Stromversorgungseinheit (NG) wird von der Steuereinheit (SE) durch Ansteuern der jeweiligen Schaltereinheit (S1, S2, S3) in jenen Lastkreisen (L1, L2, L3) der vom jeweiligen Lastkreis aufgenommene Strom zumindest reduziert und/oder abgeschaltet (105), bei welchen ein aktuell für den jeweiligen Lastkreis (L1, L2, L3) gemessenen Stromverlauf (il, i2, i3) eine obere Grenze des Toleranzbereichs des dem jeweiligen Lastkreis (L1, L2, L3) zugeordneten, signifikanten Stromprofils überschreitet.

8. 发明公开

EP4101045A2 VOLTAGE MULTIPLIER SYSTEM 审中-实审
公开(公告)号：EP4101045A2
公开(公告)日：2022-12-14
申请号：EP21750888.6
申请日：2021-04-07
申请人： Valeo Automotive Air Conditioning Hubei Co., Ltd.
发明人： WU, Qiaozheng
IPC分类号： H02H11/00 , H03K3/354

9. 发明授权

EP3484003B1 CIRCUIT ARRANGEMENT FOR AN ELECTRIC POWER CONVERTER, ELECTRIC POWER CONVERTER FOR A VEHICLE AND VEHICLE 有权转让
公开(公告)号：EP3484003B1
公开(公告)日：2022-11-30
申请号：EP17201084.5
申请日：2017-11-10
发明人： BAUMANN, Mathias
IPC分类号： H02H11/00 , H02M1/32 , H03K17/082

10. 发明授权

EP3734784B1 REVERSE BATTERY PROTECTION FOR BATTERY-POWERED DEVICES 有权
公开(公告)号：EP3734784B1
公开(公告)日：2022-10-12
申请号：EP20174418.2
申请日：2014-03-06
发明人： GOFMAN, Igor
IPC分类号： H02H11/00 , H02J7/00

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