A Communication Architecture for Inter-substation Communication

Abstract

In the realm of substation automation (SA), communication infrastructure plays a vital role in mediating between physical and virtual worlds of substation. Specification of data exchanges through standardized communication stacks is therefore an important issue for all substation equipment manufacturers seeking to provide vendor interoperability. As communication arena is changing day by day, the need for efficient and reliable communication infrastructure to address SA is evident. In this respect, a communication network constitutes the core of the SA, thus the design of cost-effective and reliable network architecture is a crucial task. Most of the existing communication networks claim to address the need of communication architecture for SA but in some regard these claims just could not fulfill the constraints imposed by highly available environment for SA. This paper presents a survey and analysis of the current state-of-the-art communication infrastructure in the SA and proposes giga-bit Ethernet topology and E-PON based architecture.

Baseline efficiency in EPON based architecture to inter-network substations

“…In the upstream direction (from users to network), due to the directional properties of a passive optical combiner, data packets from any ONU will reach only the OLT, and not other ONUs [2]. For this case the behavior of EPON is similar to that of a point-to-point architecture as shown in Fig.…”

“…To achieve functional requirements for IEDs, a modular approach is addressed by IEC61850 standard which is object-oriented. By contrast, the objectives to achieve performance requirements are changing dramatically as communication technology is getting smarter day by day [2]. communication trends, i.e., Ethernet and fiber optics.…”

“…......, 30.00 ...-_---.--"""T"""-.,...--,.....---,-......,..-..,.........., Performance impactAs for as the round trip delay for GOOSE message is concerned in order to evaluate performance impact, as an initial transmission delay during subscribing phase, we are considering 8 JlS as bay level transmission delay and 10 JlS as station level transmission delay in Gigabit Ethernet based substation[2]. Initially we have 29.8 JlS maximum delay for upstream transmission and 19.4 JlS maximum delay for downstream transmission, thus having round trip delay of 134.4 JlS {2*(8+10+29.8+19.4)} initially.…”

Gigabit Ethernet based substation under IEC61850 standard

“…In this way, Ethernet provides migration to a single and allencompassing network concept to monitor and configure different substations across the region by making use of EPON which is a communication trend shipped with the two most demanding communication technologies, i.e., Ethernet as a communication protocol and fiber optical communication system as a communication medium [6]. Hence Ethernet is the most demanding communication trend for substation to build up an efficient communication infrastructure.…”

Security Evaluation of Substation Network Architectures

“…IED is a family of devices that are based on microprocessors and includes relays, actuators, servers, gateways, and information processor. They are used for monitoring and control of other In the current state of art, inter-substation communication occurs through various technologies such as power line, satellite, optical fiber, wireless, and wireless network sensors [47]. There are different types of substations present in the power system, namely generation, transmission, and distribution substations.…”