Development of In-Phase Bus Transfer Scheme Using Matlab Simulink

Impact of Imperfect Repairs and Diagnostic Coverage on the Reliability of Multi-Channel IEC-61850 Substation Communication Network

“…Reliability and availability of IEC-61850 based SCN are needed to ensure the continuous supply of power to various process plant loads; as well as to ensure execution of critical trip commands as and when it is required in the event the process becomes abnormal in order to safeguard the plant and personnel [1], [21], [22]. IEC-60870-4 standard stipulates that a single point of failure on the SCN should not result in the system becoming inoperable [12].…”

Responsiveness of Multi-Channel IEC-61850 Substation Communication Network Reliability Performance to Changes in Repair Factors

“…In a power distribution centre, a single incoming supply to the switchboard supplies power to multiple circuits that in turn supply various loads. Most of the power distribution centre loads in a thermal plant are auxiliary boiler drives [2], [24], [25]. The reliability and availability of the draught system protection circuits are critical to ensuring the safety of the plant and personnel if the process becomes unstable and needs to be stopped with urgency [24], [26].…”

“…The transient states of the system are described by the matrix defined in (10) and given by (25) [14], [55]…”

Mission Critical Safety Functions in IEC-61850 Based Substation Automation System - A Reliability Review

“…Therefore, IEC-61850 based Substation Communication Network (SCN) automation system can be considered for implementing safety related functions since it supports interoperability between multi-vendor devices, which is most suited for substation environment where isolation of circuits is executed. Furthermore, IEC-61850 based automation system support real-time information exchange in the form of Generic Object Oriented Substation Events (GOOSE), while previous substation communication protocols such as Modbus RTU, Ethernet TCP/IP and DNP3 do not support real-time communication which is needed for protection, bus transfer schemes and interlocking information exchange between substation devices [1], [8], [9]. Substation Communication Network (SCN) failures are the main cause of substation automation system failures, with the physical layer of the Open System Interconnection (OSI) model being the area where they mostly occur [10], [11].…”