| Supplying the remote communities with electric energy, even in a developed country like Canada, has a great importance from several points of view. Some benefits include improving the life-style of such communities, and preparing the conditions for establishment of more industrial enterprises in such locations through the continuous supply of reliable, non-limited volumes of cheap energy.;DC transmission can be an economical way of supplying energy to remote loads. In this case, the problem of inversion of DC power to AC at the load location and the necessary commutation techniques must be well addressed.;The dual wound synchronous machine is a suitable means for this purpose. It provides AC voltages through the motor action to perform commutation on the inverter. And it supplies electric energy to the load through the generator action, taking place within the single machine.;In the current study, the dual wound synchronous machine is studied, and a digital model is developed to simulate the transient and the steady state operation of the machine in conjunction with EMTDC program.;Operation of a system consisting of the machine, the inverter, and the rectifier, separated by a long, monopolar DC transmission line is simulated. The results indicate that the machine successfully performs commutation on the inverter, that the machine can be started from standstill by Static Variable Frequency Starting techniques, i.e., by pulsing the rectifier on and off at low frequencies, and that the machine can be brought to rated speed by a proper closed-loop control system. |
