Development of a Laboratory Prototype of a Three Phase Three Bus Transmission System Emulator

In this paper an analog emulator of a three phase three bus transmission system has been developed. A practical transmission line data of a 100km ACSR based conductor at 230kV(L-L) and at 100MVA(3-Φ) has been scaled down at 415V(L-L) and 10kVA(3-Φ). Thorough calculation of individual line-parameters have been presented. Two constraints, namely the no-load constraint of keeping the per-unit charging current/per- phase, as of 230kV(L-L) & 100MVA(3-ϕ) base system, unchanged and full-load constraint of keeping the percentage(%) voltage- regulation within some specific limits when connected in as a single π-block, two π-blocks in cascade and two π-blocks in shunt, have been considered when modelling such scaled version of the transmission system. Results obtained from theoretically derived models have been validated with the same as obtained from simulation & from experimental set-up.