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1. 发明授权

US10965117B2 Method for controlling a leakage current protection device in a photovoltaic apparatus 有权
公开(公告)号：US10965117B2
公开(公告)日：2021-03-30
申请号：US16465366
申请日：2016-11-30
申请人： ABB Schweiz AG
发明人： Marco Belli , Diego Palumbo
IPC分类号： H02H1/04 , H02H3/353 , H02S40/32 , G01R31/50 , H02H3/16 , H02H7/20
摘要： The application includes a method to control a leakage current protection device in a photovoltaic apparatus, said photovoltaic apparatus being adapted to be electrically connected to an electric power distribution grid having one or more phase voltages at an AC section of the photovoltaic apparatus. The method includes executing a first control procedure to control the leakage current protection device, the first control procedure providing for a comparison of current check values indicative of leakage currents in the photovoltaic apparatus with one or more predefined current threshold values for the leakage currents. The method includes executing a monitoring procedure to check the phase voltages and identify possible relevant positive transients of the phase voltages. If the monitoring procedure identifies relevant positive transients of the phase voltages, one or more new current threshold values for the leakage currents are provided, the execution of the first control procedure is terminated and a second control procedure to control the leakage current protection device is executed, the second control procedure providing for a comparison of the current check values with the new current threshold values for the leakage currents, the second control procedure being executed for a predefined time interval only. After the predefined period of time has passed, the execution of the second monitoring procedure is terminated and the first control procedure is again executed.

2. 发明申请

US20190393695A1 A METHOD FOR CONTROLLING A LEAKAGE CURRENT PROTECTION DEVICE IN A PHOTOVOLTAIC APPARATUS 审中-公开
公开(公告)号：US20190393695A1
公开(公告)日：2019-12-26
申请号：US16465366
申请日：2016-11-30
申请人： ABB Schweiz AG
发明人： Marco Belli , Diego Palumbo
IPC分类号： H02H3/353 , H02S40/32 , H02H3/16 , G01R31/02 , H02H7/20
摘要： The application includes a method to control a leakage current protection device in a photovoltaic apparatus, said photovoltaic apparatus being adapted to be electrically connected to an electric power distribution grid having one or more phase voltages at an AC section of the photovoltaic apparatus. The method includes executing a first control procedure to control the leakage current protection device, the first control procedure providing for a comparison of current check values indicative of leakage currents in the photovoltaic apparatus with one or more predefined current threshold values for the leakage currents. The method includes executing a monitoring procedure to check the phase voltages and identify possible relevant positive transients of the phase voltages. If the monitoring procedure identifies relevant positive transients of the phase voltages, one or more new current threshold values for the leakage currents are provided, the execution of the first control procedure is terminated and a second control procedure to control the leakage current protection device is executed, the second control procedure providing for a comparison of the current check values with the new current threshold values for the leakage currents, the second control procedure being executed for a predefined time interval only. After the predefined period of time has passed, the execution of the second monitoring procedure is terminated and the first control procedure is again executed.

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