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Projects: Projects for Investigator
Reference Number NIA_SHET_0004
Title Dynamic Line Rating CAT1
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
Scottish Hydro Electric Power Distribution plc (SHEPD)
Award Type Network Innovation Allowance
Funding Source Ofgem
Start Date 01 April 2009
End Date 01 April 2018
Duration 108 months
Total Grant Value £792,200
Industrial Sectors Power
Region Scotland
Programme Network Innovation Allowance
Investigators Principal Investigator Project Contact , Scottish Hydro Electric Power Distribution plc (SHEPD) (100.000%)
Web Site http://www.smarternetworks.org/project/NIA_SHET_0004
Objectives Investigate the ease of integration of CAT-1 proprietary software with SHE Transmission’s SCADA system Evaluate levels of additional capacity achievable on the trial line through use of the installed CAT-1 equipment Verify the correlation between practical observations and the theoretical model already established Investigate the extent to which the technology can be applied without need for physical line uprating Estimate potential Capex and Opex savings from use of dynamic ratings based on the data obtained Successful installation of the CAT-1 system and collection of sufficient data from the monitoring phase Successful utilisation of collected data to review and evaluate technical and financial benefits and hence establish recommendations on future viability of the technology
Abstract Transmission lines are essential for moving power from generation sources to load centres. In simple terms, the amount of current flowing in a transmission line varies depending on the power needs of the connected loads and generation output. As the current increases, there is a corresponding increase in conductor heating resulting in expansion of the metallic conductor and increased sagging of the line. Strict statutory safety clearances are stipulated from high voltage (HV) overhead conductors and the ground (and structures) such that the thermal rating of an overhead line is set to maintain at least minimum clearance from ground level (and other structures). It is therefore conventional to stipulate fixed thermal ratings based on the statutory clearance requirements. These ratings are generally conservative and, although they vary with the season, they do not always take full account of all factors e.g. wind, which may affect the heating or cooling of the conductors. Network operators usually increase the transfer capability of the transmission network by increasing the conductor size on existing line routes or building new transmission lines. A potentially cost-effective alternative is to use dynamic ratings for existing transmission lines. This method involves monitoring the thermal and ambient conditions of lines in real time and using that information to determine appropriate loading based on actual prevailing conditions. This method maximises the use of existing network capacity and may reduce the need to uprate the network. This project proposes to expand on an earlier study which modelled sections of an overhead line for theoretical dynamic ratings. A dynamic rating system with real time monitoring will be trialled on this line to establish if it can be operated closer to its thermal limits whilst maintaining statutory ground clearances. This project proposes a technical trial installation of a system called CAT-1 from Valley Group which consists of sag-tension measurement, a communication link and a local data concentrator which is then interfaced with SHE Transmission’s Supervisory Control and Data Acquisition System (SCADA). The transmission line choice for the trial is based on a previous study which successfully produced theoretical ratings from a model. Once the dynamic line rating equipment is installed, the line will be monitored for up to 12 months to ensure compliance with the theoretical model.Note : Project Documents may be available via the ENA Smarter Networks Portal using the Website link above
Publications (none)
Final Report (none)
Added to Database 09/08/18