SLOA289B May 2020 – September 2021 66AK2H06 , 66AK2H12 , 66AK2H14 , ADS8588H , AMC3301 , ISO224 , ISO7740 , ISO7741 , ISO7742 , LMZ30604 , SN65LVDS047 , SN65LVDS048A , UCC12040 , UCC12050
The Converter Protection detects faults on the converter transformer secondary side, in the valve hall and failures that lead to overstress of the valves. The converter station and protection systems are designed such a way that the ac protection of the converter and adjacent ac substation are not affected by the normal, transient and dynamic behavior of the DC system.
The protection and control system of the HVDC converter station is designed to ensure that no single failure of the equipment shall cause total failure of the HVDC system. The HVDC facility is divided into a number of separately protected and overlapping zones. The protection equipment shall only act upon a specific type of fault within a designated zone and shall be stable to other types of disturbances or faults external to the relevant zone. Every protection zone is protected by two main and a backup protection function using different protection principle where ever possible. When different protection principles cannot be used, duplicated protection functions are used. The protection is independent of control as much as possible. The protection systems shall always remain active and shall be powered by separate and independent supplies.
The protection system consists of a completely redundant protection scheme incorporating the following functions: