Controlled islanding is an active and effective way of avoiding catastrophic wide area blackout. The splitting time is the determining factor of successful islanding. However, it has not been well studied before since existing islanding methods are based on the system snapshots before disturbance occurrence and do not consider dynamic islanding process. This paper investigates the splitting time of controlled islanding systematically for the first time. Transient energy function is used to evaluate the stability of islands formed during the islanding process quantitatively. And the feasible splitting time interval is determined by the critical energy of islands to ensure the coherency and transient stability within created islands. Only when the splitting is undertaken within the feasible splitting time interval, the coherency within each island can be maintained and a successful islanding is possible.
|Number of pages||7|
|Journal||Diangong Jishu Xuebao/Transactions of China Electrotechnical Society|
|Publication status||Published - 25 Jun 2015|
- Controlled islanding
- Feasible splitting time interval
- Stability region
- Transient energy function