Optimal investigation of a HVDC transmission system

This thesis describes an investigation into the design of an optimal control system for an A.C. -D. C. Power Transmission System. The steady-state operation of the plant is considered first, and the relationships between some important parameters in the system are established. The dynamic performance of the system is then considered, and an optimal controller for the system is designed using Pontryagin's Principle. Several computer programs were written to analyse and confirm the mathematical models developed in the thesis and good agreement was obtained between the computed values and the results obtained from the literature, over a range of operating and transient conditions.