Simulation of resonance over-voltage during energization of high voltage power network

Under network equipment outage conditions, the system has to be restored to normal operating conditions as fast as possible to ensure the supply security and avoid prolonged interruption of power supply. In the development of the restoration strategy under different contingencies, a wide range of issues are needed to be studied. For different contingencies, it is important that appropriate approaches, tools and study models are selected and used to meet different objectives.The extraordinary system conditions during restoration require special electromagnetic transient analysis with different system modelling methods and system parameters. All these are very different from those studies conducted for normal operating conditions. Field tests of various restoration arrangements also play an important role in calibrating the study models and parameters in order to verify the study results. With all these studies, CLP Power is able to establish practical and reliable system restoration plans.