Switching Operations in Normal, Emergency and Restorative States in Power Systems Present Status and Future Prospects
Abstract Power systems in Japan still have a continual upward tendency in size and complexity with increasing demand. Energy control centers have been expanded to cope with requirements by the modern society for the more reliable supply of electric power. Special importance has been attached to the swift and exact switching operation in emergency and restorative states. As it is almost beyond human intervention, tile automated switching operation is under study. Switching operations to be executed at the points of action (power station, substation) will be integrated into a most effective pattern of switching operations under supervision of the points of decision making (central and regional dispatching offices) in the near future.
Multilevel Conversion systems have certain advantages that can be applied in renewable energy systems. To verify that advantages we are developing a re-configurable 1 kW prototype. Among the experiments that we have considered, a sliding mode control law can force this converter to behave like an AC Current Source. We model our converter like a set of Tibuck converters operating sequentially. Some experimental results are given.