Transient stability enhancement of electric power generating systems by 120-degree phase rotation
Abstract
A method and system for enhancing the transient stability of an intertied three-phase electric power generating system. A set of power exporting generators is connected to a set of power importing generators. When a transient cannot be controlled by conventional stability controls, and imminent loss of synchronism is detected (such as when the equivalent rotor angle difference between the two generator sets exceeds a predetermined value, such as 150 degrees), the intertie is disconnected by circuit breakers. Then a switch having a 120-degree phase rotation, or a circuit breaker having a 120-degree phase rotation is placed in the intertie. The intertie is then reconnected. This results in a 120-degree reduction in the equivalent rotor angle difference between the two generator sets, making the system more stable and allowing more time for the conventional controls to stabilize the transient.
- Publication Date:
- OSTI Identifier:
- 6888557
- Assignee:
- Dept. of Energy
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 24 POWER TRANSMISSION AND DISTRIBUTION; CONTROL EQUIPMENT; DESIGN; INTERCONNECTED POWER SYSTEMS; STABILITY; AC SYSTEMS; ELECTRIC GENERATORS; ELECTRICAL TRANSIENTS; OPERATION; SYNCHRONIZATION; ENERGY SYSTEMS; EQUIPMENT; POWER SYSTEMS; TRANSIENTS; VOLTAGE DROP; 200301* - Power Transmission & Distribution- AC Systems, EHV & UHV- (-1989)
Citation Formats
. Transient stability enhancement of electric power generating systems by 120-degree phase rotation. United States: N. p., 1980.
Web.
. Transient stability enhancement of electric power generating systems by 120-degree phase rotation. United States.
. Mon .
"Transient stability enhancement of electric power generating systems by 120-degree phase rotation". United States.
@article{osti_6888557,
title = {Transient stability enhancement of electric power generating systems by 120-degree phase rotation},
author = {},
abstractNote = {A method and system for enhancing the transient stability of an intertied three-phase electric power generating system. A set of power exporting generators is connected to a set of power importing generators. When a transient cannot be controlled by conventional stability controls, and imminent loss of synchronism is detected (such as when the equivalent rotor angle difference between the two generator sets exceeds a predetermined value, such as 150 degrees), the intertie is disconnected by circuit breakers. Then a switch having a 120-degree phase rotation, or a circuit breaker having a 120-degree phase rotation is placed in the intertie. The intertie is then reconnected. This results in a 120-degree reduction in the equivalent rotor angle difference between the two generator sets, making the system more stable and allowing more time for the conventional controls to stabilize the transient.},
doi = {},
url = {https://www.osti.gov/biblio/6888557},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {5}
}