Dynamic security assessment of Danish power system based on decision trees: Today and tomorrow

摘要

The research work presented in this paper analyzes the impact of wind energy, phasing out central power plants and cross border power exchange on dynamic security of Danish Power System. Contingency based decision tree (DT) approach is used to assess the dynamic security of present and future Danish Power System. Results from offline time domain simulation for large number of possible operating conditions (OC) and critical contingencies are organized to build up the database, which is then used to predict the security of present and future power system. The proposed approach is implemented in DIgSILENT PowerFactory environment and applied to western Danish Power System which is experiencing a phase of major transformation. The results have shown that phasing out central power plants coupled with large scale wind energy integration and more dependence on international ties can have significant impact on dynamic security of Danish power system in future, if alternative measures are not considered seriously.