Real-time Testbed for Smart Substation Interoperability: A Case Study on Auxiliary Control System

Smart substation auxiliary control system (SSACS) is an important part of the smart substation. Among them, the national grid technical standards have made corresponding provisions on the function, composition, communication, etc. of the auxiliary control system, but they are relatively general. And there are some differences in the division, functions, access methods, and other aspects of the subsystem. At the same time, there are great differences in the product realization of various manufacturers, which brings serious problems to the operation and maintenance of smart substations. A simulation-based test framework is proposed to design a test system for the smart substation auxiliary control system to strictly test the whole system. All the devices and IEC 61850 protocols are tested by the proposed simulators. The experiment results show the test system can effectively test the auxiliary control system.