JPH01198256A - Ground-fault protective device of synchronous generator - Google Patents
Ground-fault protective device of synchronous generatorInfo
- 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
Links
- 230000001360 synchronised Effects 0.000 title abstract 4
- 230000001681 protective Effects 0.000 title abstract 3
- 230000001264 neutralization Effects 0.000 abstract 2
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
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) |
-
1988
- 1988-02-03 JP JP2205188A patent/JPH01198256A/en active Granted
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