IEC61850 based Substation Automation System

Abstract

Substation Automation Systems (SASs) are widely used for the purpose of control, protection, monitoring, communication etc. in substations to improve the reliability of the power system. SASs adopting IT based solutions such as Ethernet LAN have recently become more common, although hardwired control has been used in the past in earlier versions of SAS utilizing simple communication methods. Moreover, the IEC61850 standard has been issued as the new global communication standard for substations. The standard consists of ten parts, the final part being issued in 2005. Subsequently IEC61850 has been applied widely in SASs around the world.In this paper, we describe our experience of an IEC61850 based SAS, including system design and build methods. In addition, we also cover concepts for system build and detailed system configuration, the benefits of IEC61850, points to be considered for implementation of IEC61850 and issues that we have experienced in our practical application of the standard together with the measures that we have developed to overcome these issues.

Analysis of end-to-end delay characteristics for various packets in IEC 61850 substation communications system

“…Once the data packets transfer has been delayed and has not been reached to the target devices within the predetermined period of time, which may lead to extremely serious consequences, and endanger the substation and even the entire grid [1][2][3][4][5][6][7][8]. The key objectives for designing any substation automation architecture are interoperability between the IEDs, satisfaction of communication performance, and extensibility of the architecture.…”

“…An optimized network engineering tool (OPNET) or Riverbed modeler is used to simulate various SAS networks under diverse scenarios, allowing user to set the raw sample rate, fault time, number of faults, background traffic and other configuration parameters [10]. As part of the IEC 61850 standard special messages are also planned for a quick exchange of information between the IEDs, which is called generic object-oriented substation event (GOOSE) messaging [4,[11][12][13]. The network topology is critical when using the GOOSE messaging.…”

“…The network topology is critical when using the GOOSE messaging. Since the message may include protective signals, redundancy of the Ethernet Local Area Network (LAN) may be required [4,[14][15][16].…”

“…Substation communication network transmission packets have strict delay requirements, real-time study for the underlying communication network, in particular, the media access control (MAC) layer protocol, while ignoring the real-time upper-layer protocols [2]. The transmission protocol, network load and networking mode are the main factors affecting the real-time performance of the SAS network [3][4]. Among the transmission delay constitution factors, message packaging and parsing take up most of the time, which relates to the transmission model and protocol [5].…”

“…The network topology is critical when using the GOOSE messaging. Since the message may include protective signals, redundancy of the Ethernet Local Area Network (LAN) may be required [4,[14][15][16].In this report, star network architectures have been used for the modeling of IEC 61850 and analyzed the simulated results. Different cases are: (i) According to substation communication network performance requirements, substation…”