Security-Constrained Power System Transfer Capability Assessment

Exhibitor: Sheng H. Goh

Supervisor: Tapan Saha

Research Group: Complex and Intelligent Systems

Industry Sector: Energy and Utilities

Electricity market deregulation has resulted in heavily-loaded power networks and a trend of greater interconnections, and thus transfer capability becomes a key issue.

At present, many transfer capability techniques are performed in a simplified manner, with minimal consideration of security constraints. This is unacceptable as the risks for not evaluating security impacts are high. There have been doubts on whether current techniques could provide 'secure' transfer capability calculations, thus introducing a new challenge for further investigation. Here, we proposed an optimal power flow based (OPF-based) approach for transfer capability assessment, focusing mainly on total transfer capability (TTC) computation, incorporating security constraints consideration.

In this approach, the security constraints we considered are the small signal stability limit and line stability limit. Using this approach, system planners/operators can then use the 'secure' TTC information obtained for whatever planning or operation purposes.