Transformation theory of general static polyphase networks

Starting from the canonical equations of a general, linear, bilateral network and by the application of transformation matrices, giving the various current constraints in typical polyphase systems, equations are obtained which give the response of the most general wye-wye, delta-delta, and delta-wye static systems to arbitrary electromotive forces at the sending and receiving ends. Mutual inductances and capacitances are assumed between the various branches of the circuits.