公开(公告)号：US09103865B2

公开(公告)日：2015-08-11

申请号：US13726730

申请日：2012-12-26

Applicant: GENERAL ELECTRIC COMPANY

Inventor： Mohamed Agamy ,  Ahmed Elasser ,  Anthony William Galbraith ,  Maja Harfman Todorovic

IPC: G01R31/00 ,  G01R31/02 ,  H02H3/33 ,  H02H3/46 ,  H02S50/10 ,  G01R31/12 ,  H02H7/20 ,  G01R31/40

CPC classification number: G01R31/025 ,  G01R31/1272 ,  H02H3/33 ,  H02H3/46 ,  H02H7/20 ,  H02S50/00 ,  H02S50/10 ,  Y02E10/56

Abstract: Methods for determining a ground fault or insulation degradation condition within energy conversion systems are described. A method for determining a ground fault within an energy conversion system may include, in part, a comparison of baseline waveform of differential current to a waveform of differential current during operation for a plurality of DC current carrying conductors in an energy conversion system. A method for determining insulation degradation within an energy conversion system may include, in part, a comparison of baseline frequency spectra of differential current to a frequency spectra of differential current transient at start-up for a plurality of DC current carrying conductors in an energy conversion system. In one embodiment, the energy conversion system may be a photovoltaic system.

Abstract translation: 描述了在能量转换系统中确定接地故障或绝缘劣化条件的方法。 用于确定能量转换系统内的接地故障的方法可以部分地包括差分电流的基线波形与在能量转换系统中的多个直流载流导体的操作期间的差动电流的波形的比较。 用于确定能量转换系统内的绝缘劣化的方法可以部分地包括差分电流的基线频谱与在能量转换中的多个直流载流导体的起动时的差动电流瞬变的频谱的比较 系统。 在一个实施例中，能量转换系统可以是光伏系统。