Ordering and initialization algorithms for control system models

A recently developed multiterminal HVDC stability program utilizes a control modeling approach which defines all HVDC control models from user-supplied data. The models are built through a combination of basic control system building blocks as transfer functions, limiters, adders, and transducers. Successful implementation of this modeling approach requires the development of algorithms to place the control system building blocks into the correct solution order and to initialize the control model to a predetermined steady-state solution. The algorithms developed are quite general in application. They are examined and demonstrated through the use of control system examples