Choice of analytical and modelling methods for reactive compensation equipment

Modern reactive compensation equipment exhibits nonlinear characteristics which could give rise to unsatisfactory operation. Analytical studies are required in the design stage of such equipment and also in the application phase. The paper examines the modelling techniques available for such studies and considers their application in a range of system conditions. Losses are shown to be important in setting a lower limit to the size of physical models. Mathematical models are discussed in relation to the difficulties in securing a fully comprehensive mathematical model. Finally, the problems of modelling compensation plant for a DC transmission system convertor station are considered briefly, since this is an area of particular interest to many