A backboard bus based design scheme for substation-area protection and control equipment used in smart substations is proposed. A multiple master communication backboard bus is designed based on multi-point low voltage differential signaling (M-LVDS). The cooperation model is described according to resource configuration and logic diagram division. With backboard bus as the core
a multi-level dataset interaction and control model is developed between the virtual logic bus
backboard bus
process bus and wide area communication network. Several topics are discussed
such as the principle of backboard
realization and function division of logic diagram
realization of multi-level data exchange. The design scheme proposed is applied in substation-area protection and control equipment for a 110 kV smart substation for function transfer
redundancy protection
concentrated backup protection
safety automatic control
etc. Site operation has proved its effectiveness and practicality.