JPH01198256A - Ground-fault protective device of synchronous generator - Google Patents

Ground-fault protective device of synchronous generator

Info

Publication number
JPH01198256A
JPH01198256A JP2205188A JP2205188A JPH01198256A JP H01198256 A JPH01198256 A JP H01198256A JP 2205188 A JP2205188 A JP 2205188A JP 2205188 A JP2205188 A JP 2205188A JP H01198256 A JPH01198256 A JP H01198256A
Authority
JP
Japan
Prior art keywords
power
factor
synchronous generator
voltage
ground
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2205188A
Other languages
Japanese (ja)
Inventor
Shizuo Oshima
Original Assignee
Toshiba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP2205188A priority Critical patent/JPH01198256A/en
Publication of JPH01198256A publication Critical patent/JPH01198256A/en
Granted legal-status Critical Current

Links

Abstract

PURPOSE: To prevent an unnecessary operation of a ground-fault protective device caused by extrinsic factors of a system side by monitoring and detecting variations in the terminal voltage and the power-factor of a generator.
CONSTITUTION: A neutral point circuit of a synchronous generator 1 is grounded through an earth transformer. An earth resistor 3 and a third harmonic undervoltage element 4 are connected to a secondary circuit of the earth transformer 2. The terminal voltage and the power-factor of the synchronous generator 1 are respectively detected by a voltage detector 8 and a power-factor detector 9. A third harmonic voltage of the neutral point of the synchronous generator 1 is reduced by extrinsic factors of the system side and even if the third harmonic undervoltage element 4 operates, a ground-fault protective device 10 does not operate when the voltage detector 8 and the power-factor detector 9 detect a drop in voltage and in power-factor.
COPYRIGHT: (C)1989,JPO&Japio
JP2205188A 1988-02-03 1988-02-03 Ground-fault protective device of synchronous generator Granted JPH01198256A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2205188A JPH01198256A (en) 1988-02-03 1988-02-03 Ground-fault protective device of synchronous generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2205188A JPH01198256A (en) 1988-02-03 1988-02-03 Ground-fault protective device of synchronous generator

Publications (1)

Publication Number Publication Date
JPH01198256A true JPH01198256A (en) 1989-08-09

Family

ID=12072121

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2205188A Granted JPH01198256A (en) 1988-02-03 1988-02-03 Ground-fault protective device of synchronous generator

Country Status (1)

Country Link
JP (1) JPH01198256A (en)

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