12-09-2014, 03:42 PM
Distribution System Automation
Distribution.pdf (Size: 89.51 KB / Downloads: 133)
Abstract
Electric power distribution system is an important part of electrical power systems in delivery of
electricity to consumers. Automation in the distribution field allows utilities to implement
flexible control of distribution systems, which can be used to enhance efficiency, reliability, and
quality of electric service. Presently, worldwide research and development efforts are focused in
the areas of communication technologies revolution and application of IEC 61850 protocol in the
distribution automation to make distribution automation more intelligent, efficient and cost
effective.
This report presents brief overview about the distribution system automation. The application
areas, advantages and commercially available products for the distribution system automation are
also described in detail. It also discusses about the present implantation philosophies and current
challenges in the distribution system automation. Further, EPRI ‘IntelliGrid’ project is discussed
as an example of advance distribution system automation. Finally, communication aided
advanced distribution system automation and its advantages are explained in detail.
Literature Survey
Definition of distribution automation system, three different zones in which distribution
automation is implemented and advantages of automation system is given in reference [1].
Limitation of present automation techniques used in the field, challenges of implementing new
technologies are given in reference [2, 3]. Commercially available devices for distribution
automation purpose are listed in references [4-6]. As the technology advances, there are possible
solutions to develop advanced distribution automation system. The requirements and
implementation of Advanced Distribution Automation (ADA) is explained in [7, 8]. In reference
[9], new approach of using IEC 61850 at distribution automation level is discussed.
Communication aided Distribution Automation using IEC 61850
Communication aided distribution automation is the effective mix of local automation, remote
monitoring and control capabilities on strategic field devices. This combination of technologies
empowers a highly reliable, self-healing (auto-restoration) power system that responds rapidly to
real-time events with appropriate actions. Automation does not just replace manual procedures; it
permits the power system to operate in a most efficient and optimal way, based on accurate
information provided in a timely manner to the decision-making applications and devices.
Many DA functions have been implemented by utilities throughout the world. These DA
functions vary greatly in nature and so does their communication requirement. Different DA
functions have so far almost always been implemented by using proprietary protocols. Thus,
there has long been a great need for an open and integrated communication system capable of
supporting all DA functions transparently [2]. Communication standards have now been
developed that make use of these technologies. In particular, IEC61850 (with some extensions
for distribution equipment) can provide solutions to automation issues using state-of-the-art
object modeling technologies.
Conclusions
This report identifies the advantages of automation application at distribution level. Distribution
automation enhances the efficiency and productivity of a utility, and also provides quality and
reliable supply to the consumers. Commercially available products for distribution automation
application are also discussed. Later part of the report discusses the challenges faced by current
distribution automation system and need for advanced distribution automation. Further,
developments in communication technology and standardized protocol 61850 for the
implementation of advance distribution automation are illustrated with details.