TRACK TECHNOLOGY
ABB’s Tim Spearing outlines the products that make the protection, control, measurement and supervision of power systems comply with the new IEC 61850 standard.
he UK’s rail electrification infrastruc- ture is currently undergoing a signifi- cant programme of renewals and power sup- ply enhancements to meet the ever-increas- ing demands of new rolling stock and new timetables. Within this programme there is a major emphasis on achieving high levels of power reliability and availability while opti- mising installation and total lifetime costs.
T
The introduction of the new IEC 61850 standard for substation communications, with a particular focus on the protection and control philosophy, is set to play a key role in this programme by helping reduce over- all capital costs associated with substation hard-wiring and installation.
There are many thousands of substation automation systems installed worldwide. But until quite recently, there was no over- all standard for the serial communications in substation automation, so the majority of these systems are based on proprietary standards. This meant that each system was limited to using components from a single supplier, or complex and costly protocol conversions had to be applied.
It is natural for power utilities to want to safeguard their investment in substation automation equipment. This has resulted in a growing demand for flexible, future-proof systems able to cope with changing requirements, philosophies and technologies.
In the early years of this century, the indus- try responded by developing and releasing a new standard, IEC 61850, ‘Communica- tion Networks and Systems in Substations’, which is the first and only global standard that considers all the communication needs within substations.
The IEC 61850 standard
IEC 61850 essentially defines standard- ised data models and sets, communication mechanisms and the system configuration language (SCL) in order to achieve a number of goals:
• interoperability of system components and software tools;
180 | rail technology magazine Apr/May 11
• free allocation of functions as well as choice of different system architectures;
• reuse of system configuration data; • understanding of the system description and functionality.
The standard is future-oriented, taking into consideration that developments in communication technology move faster than developments in the functionality of substation automation, protection and control equipment.
ABB’s Relion® family ABB has developed its Relion®
protection and control intelligent electronic device (IED) that is perfectly harmonised for utility and industrial power systems, including looped and meshed distribution networks.
The RED615 provides high speed, longitudinal differential protection for overhead line and cable feeders in distribution networks.
Two RED615s product fam-
ily to offer the widest range of products for the protection, control, measurement and supervision of power systems. To ensure interoperable and future-proof solutions, Relion products have been designed to im- plement the core values of the IEC 61850 standard.
Relion RED615
Of particular interest for railway traction ap- plications is the Relion RED615, which is a phase-segregated two-end line differential
interconnected over a communication link form an absolutely selective unit protection scheme. Typical RED615 applications include two or multiple parallel lines between substations and meshed cable networks in urban and suburban areas. Line differential protection is also applied to industrial power systems and special objects, such as power systems for road and rail tunnels.
RED615 devices provide the basis for a current project being carried out between ABB and a particular utility for the staged introduction of an IEC 61850 protection and control solution into a railway electrical substation.
FOR MORE INFORMATION Visit
www.abb.com/railway
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