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Reference Number	NIA_NGET0019
Title	Reliability Assessment of System Integrity Protection Schemes (SIPS)
Status	Completed
Energy Categories	Other Power and Storage Technologies(Electricity transmission and distribution) 100%;
Research Types	Applied Research and Development 100%
Science and Technology Fields	ENGINEERING AND TECHNOLOGY (Electrical and Electronic Engineering) 100%
UKERC Cross Cutting Characterisation	Not Cross-cutting 100%
Principal Investigator	Project Contact No email address given National Grid Electricity Transmission
Award Type	Network Innovation Allowance
Funding Source	Ofgem
Start Date	01 October 2012
End Date	01 January 2014
Duration	17 months
Total Grant Value	£125,000
Industrial Sectors	Power
Region	London
Programme	Network Innovation Allowance
Investigators	Principal Investigator	Project Contact , National Grid Electricity Transmission (100.000%)
Web Site	http://www.smarternetworks.org/project/NIA_NGET0019
Objectives	The key objective of this project is to carry out a reliability assessment of existing System Integrity Protection Schemes (SIPS) (called Operational Tripping Schemes (OTS) in National Grid). The project will evaluate current architectures and technical solutions already deployed and the business and network impacts faced by the probabilistic risks in setting, arming and, failure to operate and mis-operation of these schemes. This will support the development of policies and specifications to help direct future requirements for SIPS architectures, which may need to meet higher levels of security and dependability, in a more uncertain and flexible transmission network. This work will be successful if we deliver a reliability assessment of existing SIPS in National Grid.
Abstract	The probability of failure and adverse operations encompasses the impacts of both dependability and security- based mis-operation and also delayed operation cases. As the number and complexity of SIPS in operation increases in National Grid (to overcome these challenges of a future constrained and stressed network infrastructure), it must be ensured that their performance and cost is optimised against the risks, to ensure the necessary the reliability requirements of National Grid’s network continue to be met and to prevent and manage undesirable situations occurring. Some work has been done by this researcher already on the evaluation of SIPS reliability from data gathered from North America and these techniques have been applied as an example to National Grid’s Dinorwig Intertrip scheme to demonstrate applicability, this has been identified as the main causes of SIPS mis- operations and proposes a method for assessing SIPS reliability and how this could be applied to the Dinorwig Intertrip Scheme. In addition there are potential risks introduced to the transmission system by unintended interactions between neighbouring and overlapping SIPS and these will also be investigated. SIPS have typically been designed for dependability rather than security; however security will become increasingly important with the potential technical and economic impact of mal-operations on a more dynamic, complex and constrained system. The method that has been proposed for this project includes the following; Review of National Grid’s historical database. Identification of SIPS mis-operations and their main causes. Report Impact assessment of communication services reliability on SIPS overall reliability. Identification of bottlenecks of the existing communication system. Benefits of implementing IEC 61850. Report Reliability-based design refinement. Recommendations for increasing SIPS reliability. Report Risk assessment of undesirable interactions between SIPS. Proposal of techniques for effective coordination between different and independent SIPS. Report Review and Final ReportNote : Project Documents may be available via the ENA Smarter Networks Portal using the Website link above
Publications	(none)
Final Report	(none)
Added to Database	11/12/18