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Control and Protection System
The control and protection system, as the core of UPFC, controls, monitors and protects all the equipment of system.
Adoption of embedded software and hardware technology, distributed architecture and object-oriented approach for dividing function.
Realization of all the operation modes of UPFC and switchover between different mode, including UPFC mode, Static Synchronous Series Compensator (SSSC) mode and Static Synchronous Compensator (STATCOM) mode.
Smooth start and stop function to solve the series-side converter charging problem and be able to put into the series transformer without stopping the transmission line.
Proposal of multi-inverter double-circuit line control strategy via automatic selection of the master control unit.
Reasonable partition of UPFC with the complete protection to realize no dead zone protection for the entire UPFC adapted to different operating modes.
