In order to solve the problems of large number of process layer products

large impact

complex configuration and wide range of fault influence in the "three-layer and two network" system architecture of intelligent substation

the current "three-layer and two network" architecture of intelligent substation is analyzed

and the "two-layer and one network" system architecture design of the third generation intelligent substation is given.Combined with "two layers and one network"

this paper studies the key technology of the local module of the main equipment in the process layer

and puts forward a design scheme of the local module of the main equipment in the third generation intelligent substation based on the system architecture of "two layers and one network".The local module of the main equipment in the scheme replaces the merging unit and intelligent terminal of the original process layer

and the local design of the same equipment installation is carried out in the same time.At the same time

the key technologies such as the configuration free scheme of the local module of the main equipment

the monitoring of the physical link of the ring network

the automatic switching of the multi-channel SV cascade data and the design of the software and hardware architecture are given.After the inspection by the authority

it fully meets the IEC 61850 standard

with simple function

excellent performance and high reliability.It realizes the intelligent primary equipment

reduces the burden of operation and maintenance

improves the reliability of the system

and has practical significance for wide promotion.