Methods for locating ground faults and insulation degradation condition in energy conversion systems

Agamy, Mohamed; Elasser, Ahmed; Galbraith, Anthony William; Harfman Todorovic, Maja

Title: Methods for locating ground faults and insulation degradation condition in energy conversion systems

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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.

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

Issue Date:: 2015-08-11

Research Org.:: GE Global Research, Niskayuna, New York (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1209350

Patent Number(s):: 9103865

Application Number:: 13/726,730

Assignee:: General Electric Company (Niskayuna, NY)

Patent Classifications (CPCs):: H - ELECTRICITY H02 - GENERATION H02S - GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRA-RED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES

H - ELECTRICITY H02 - GENERATION H02H - EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS

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H - ELECTRICITY H02 - GENERATION H02S - GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRA-RED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
H02S50/10 - Testing of PV devices, e.g. of PV modules or single PV cells

H - ELECTRICITY H02 - GENERATION H02H - EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
H02H3/33 - using summation current transformers

H - ELECTRICITY H02 - GENERATION H02S - GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRA-RED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
H02S50/00 - Monitoring or testing of PV systems, e.g. load balancing or fault identification

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
Y02E10/56 - Power conversion electric or electronic aspects

H - ELECTRICITY H02 - GENERATION H02H - EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
H02H7/20 - for electronic equipment

G - PHYSICS G01 - MEASURING G01R - MEASURING ELECTRIC VARIABLES
G01R31/52 - Testing for short-circuits, leakage current or ground faults
G01R31/1272 - {of cable, line or wire insulation, e.g. using partial discharge measurements

H - ELECTRICITY H02 - GENERATION H02H - EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
H02H3/46 - responsive to frequency deviations

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DOE Contract Number:: EE0000572

Resource Type:: Patent

Resource Relation:: Patent File Date: 2012 Dec 26

Country of Publication:: United States

Language:: English

Subject:: 30 DIRECT ENERGY CONVERSION

Citation Formats


                    Agamy, Mohamed, Elasser, Ahmed, Galbraith, Anthony William, and Harfman Todorovic, Maja. Methods for locating ground faults and insulation degradation condition in energy conversion systems.  United States: N. p., 2015. 
        Web.

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                    Agamy, Mohamed, Elasser, Ahmed, Galbraith, Anthony William, & Harfman Todorovic, Maja. Methods for locating ground faults and insulation degradation condition in energy conversion systems.  United States.

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                    Agamy, Mohamed, Elasser, Ahmed, Galbraith, Anthony William, and Harfman Todorovic, Maja. Tue .  
        "Methods for locating ground faults and insulation degradation condition in energy conversion systems".  United States.  https://www.osti.gov/servlets/purl/1209350.

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@article{osti_1209350,

  title        = {Methods for locating ground faults and insulation degradation condition in energy conversion systems},

  author       = {Agamy, Mohamed and Elasser, Ahmed and Galbraith, Anthony William and Harfman Todorovic, Maja},

  abstractNote = {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.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2015},

  month        = {8}

}

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