抄録
For the purpose of maintaining the power system security, the authors are developing an Integrated Security Monitoring and Control (ISMAC) system which consists of the three main functions: security monitoring, preventive control and emergency control. This paper focuses on the dynamic preventive control which deals with the transient stability immediately after the contingency has occurred. The proposed method is based on the transient stability assessment using the pattern recognition with two dimentional feature space; therefore we can obtain the preventive control strategy fast. An index which represents the severity of the contingency quantitatively (security index) is defined by the distance from a linear decision surface which devides a feature plane into stable and unstable region. Further, this method has also the advantage that it is possible to consider the effect of the control devices or damping to some extent and specify the operator demand for stabilization flexibly.
The effectiveness of the proposed method is ascertained through numerical examples for model power systems.
