Substation cloud computing for secondary auxiliary equipment

This paper introduces the design and development of a cloud computing platform for substation secondary auxiliary equipment functions, the Substation Cloud in short, which including fault detection particularly for neutral indirectly earth systems, wide area fault location, harmonic monitoring and state monitoring of power equipments and so on. In the system, a specially designed interfacing unit at each substation receiving data from merge units is responsible for sending data from the substation to the cloud platform developed through communication network, those data including static, dynamic, transient measurements and states of circuit breakers etc. The cloud platform receives the data from substations, extracts valuable information from and allocates them to various specially designed computation algorithms in the platform to perform advanced functions in order to identify the faulted line, the accurate fault location and the contents of harmonics etc.