"Applications and Advantages for Protection schemes using IEC 61850 Standard"

Modern substations which are being built today use sophisticated microprocessor based relays. These relays have drastically reduced the cost of substations by combining multiple protection elements into one device. Additional enhanced functionality has also eliminated the need for separate devices such as measurement transducers, sequence of event recorders, large point count RTU´s (remote terminal units) and, transient fault recorders. Until now complicated control schemes, such as, an auto transfer scheme or a throw over scheme for main-tie-main switchgear, or reverse interlocking bus protection, still required copper wires, auxiliary and lockout relays to achieve high speed reliable functionality. Implementation of the new IEC 61850 (International Electrotechnical Commission) standard will allow this to change