There is a 33kv generation bus. From this generation bus, 33/11kV outgoing transformer feeder connected to bus A. The bus A connected to another 11kV bus B (it is a radial feeder). The 11kV bus B connected to Bus C (radial feeder). This was the normal power flow direction (33kv generation bus →old transformer →Bus A →Bus B →Bus C).Due to extension of network, what they done was the another 33/11kv transformer from the 33kv generation bus directly connected to Bus C. Bus A incomer breaker kept open. And also additionally bypass switch (15kV-W2T-NON-FUSED VACUUM SWITCH, (RVAC)-E200-MILD STELL) and 11kV, 500A, 550KVA voltage regulator added in between bus B and bus C. During the back feed power flow (33kv generation bus → new transformer →Bus C → voltage regulator →Bus B →Bus A), does this design have any issues? Voltage regulator makes any issue?
