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Detect Principle Analysis for the Line-to-ground Fault Indicator Base on Signal Injection

Author: ChengHaiBin
Tutor: ChangXianRong；WangDongHai
School: North China Electric Power University (Hebei)
Course: Electrical Engineering
Keywords: Grounding line Fault Indicator Zero-sequence current 5th harmonic Signal injection method
CLC: TM862
Type: Master's thesis
Year: 2009
Downloads: 124
Quote: 0
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Abstract


The single-phase ground fault line selection and positioning principle for single-phase distribution network fault line selection and positioning difficulties , while analysis of the advantages and disadvantages of commonly used single-phase ground fault detection device . Small current grounding system , single- phase ground fault , the fault signal itself is weak , vulnerable to electromagnetic interference and harmonic pollution , resulting in signal distortion , these have a direct impact on the selectivity of the line selection and accurate even cause the selecting device malfunction . Combined with the actual situation of the work with reference to the actual characteristics of the various devices , line selection and positioning device selection signal injection method as with grid single-phase ground fault detection device , the more successful solution to the single-phase ground in distribution network fault location difficult problem.

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CLC: > Industrial Technology > Electrotechnical > High Voltage Engineering > Overvoltage and Its Protection > Over-voltage protection devices
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