Real Time Simulation of Stability Functions of HVDC Systems - A Case Study of ± 500 kV, 2500 MW Ballia-Bhiwadi HVDC Link using Controller Replica

SUMMARY Indian Power System is rapidly expanding and becoming more complex with the installation of sophisticated power electronic systems and demands a higher reliability and availability. The occurrence of transient stability issues due to complexity of power system is becoming more challenging. These issues can be resolved with interaction of HVDC system with the interconnected AC systems. The stability functions are often cited as an important advantage of HVDC systems. In order to improve the system stability, the stability functions of HVDC will be useful. To achieve the promised advantages, these functions must perform appropriately for various disturbances and system conditions. A Real Time Simulator allows to accurately and efficiently simulate all the system conditions, taking the hardware controllers / protective devices into closed loop and presents response of controllers under testing.