The Calculation of the Regulation Characteristics of D-C Transmission Systems

An account is given of a method for determining the performance characteristics of one terminal of a d-c transmission system taking into account the supply system, the filter bank, and, in the most general case, the synchronous-compensators whose reactive power output is made dependent on the converter-transformer line voltage. The method forms the basis of a digital computer program whose logical structure is described. Examples are given of the application of the program to the case where the receiving a-c system is weak in relation to the power transmitted by the d-c link. Results are presented in graphical form to show the voltage regulation and the reactivepower conditions.