Dispatching automation system is the core of modern power grid dispatching operation management

which is important to the safe

stable and economical operation of the power grid. With the all-round upgrade of the smart grid dispatching support system

auxiliary work of numerous remote terminals connected to the system need be completed. This paper has solved the problems with system update

e.g.

large numbers of remote terminal address changes faced

excess multi-front system load of remote terminal

unbalanced load of dispatching automation front system and redundant reliability of multi-front system switching by researching the key technologies of multifront system cluster virtual gateway and developing the special cluster virtual gateway that satisfies secondary security and real-time redundant performance. This work is supported by State Grid Corporation of China (No. 5211011400B8).