The PCS-9500 series provides complete control and protection solutions for HVDC transmission projects. With self-reliance innovative methods, NR has successfully developed the HVDC control and protection system with proprietary intellectual property rights, which includes new principles and technologies aimed at engineering needs. Most of technologies are at the international leading level. The PCS-9500 series is intended for application on long-distance UHVDC transmission up to ±800kV and back-to back converter station of all voltage levels.
The PCS-9500 control and protection system is a complete system solution for control and protection of HVDC and FACTS. The following features are provided:
l High reliability is the most important goal beside the function.
l Overall redundancy of the system.
l Independent of control and protection equipment for each 12 pulse converter unit.
l Bipolar level function segregated to pole level equipment.
l Overall duplicate protection system.
l One AC control system handle one 3/2 bay.
l Overall integrated SCADA system.
l No power loss with pole level equipment fault.
l The DC control systems are based on a hierarchical design to achieve the highest reliability.
l The DC control function is divided into pole control level and bipolar control level.
l All devices are duplicated.
So far, the PCS-9500 has been successfully applied to many HVDC projects including ±800kV UHVDC system which is of the highest voltage level in HVDC projects worldwide. Years’ operating practice proves that the PCS-9500 can provide high reliable control and protection for HVDC transmission.