Comparison of Suitable Control Systems for HVDC Stations Connected to Weak ac Systems Part II. Operational Behaviour of the HDVC Transmission

The performance of HVDC systems depends to a great extent on the control methods used. The performance of the control methods described in Part I of this paper is investigated under steadystate and transient conditions. Attention is also given to the problem of harmonics in the ac system. The results show that all the described methods are suitable for HVDC operation on weak ac systems. The choice of the proper control method in a given case depends on the requirements which are to be met by the HVDC system as a whole.