First CIGRE Benchmark for HVDC control studies

 This demo models the first CIGRE benchmark for HVDC link protection studies rated at 1000 MW with a DC voltage of 500 kV and a DC current of 2 kA. The monopolar DC-link is modeled as a back-to-back link with a smoothing reactor on each side and a capacitor in the middle. Tap changers are not simulated and fixed taps are assumed. Both AC systems are modeled with a short-circuit ratio (SCR) of 2.5, which is considered as a weak AC system. This condition makes the AC systems’ voltage stability harder and thus, the HVDC controls more difficult because they are bound to operate near the stability margin. The benchmark is also defined in a way that creates composite resonances between the AC and the DC system, also creating tough conditions for HVDC controls. Two circuit breakers are used to apply faults on the inverter AC side and the rectifier DC side.

Related Products