Apparatus and method for out-of-step protection using the analysis of trajectories of electrical measurements in state plane
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United States of America Patent
Stats
-
Dec 27, 2016
Grant Date -
Jan 30, 2014
app pub date -
Jul 24, 2013
filing date -
Jul 24, 2012
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Various embodiments are described herein for a device and method for predicting an out-of-step or transient instability condition in a power system due to a disturbance, such as a fault, where the power system comprises a power generator. The method comprises determining values for a state plane trajectory for the power generator during the disturbance based on using an internal voltage angle of the power generator or an equivalent power generator and a during fault rotor speed of the power generator or equivalent power generator as state variables, determining time scale values; determining values for a critical state plane trajectory for the power generator after clearing the fault, determining values for a state plane trajectory for the power generator after clearing the fault, determining a critical clearing angle and a critical clearing time, and predicting that the power generator will be stable or unstable by comparing the time to clear the fault with the critical clearing time.
First Claim
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Family
International Classification(s)
- G05B:CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTION....
- G06F:ELECTRIC DIGITAL DATA PROCESSING
- G01R:MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC V....
- G01D:MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VAR....
- H01H:ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PR....
- H02H:EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
Cited Art Landscape
Patent Citation Ranking
- 3 Citation Count
- G05B Class
- 11.58 % this patent is cited more than
- 9 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jun 27, 2028 |
