Experimental validation of transmission line dynamic thermal simulation model

Abstract

In recent times, great emphasis is given to operate the power system networks more efficiently to reduce power price. To achieve higher line ratings, the transmission system operators resort to dynamic line ratings. In some cases, to increase the ratings further, short-time transient ratings are used. When the transmission line conductors are pushed to the limits, it is important to ensure that the real-time ratings and the conductor temperatures are estimated accurately. For this purpose, often the conductor thermal model is used to simulate the time-varying conductor temperature. It is equally important to validate the simulation model used to ensure the accuracy of temperature prediction. This paper addresses three different methods of experimentally validating the simulation model. Experimental results are compared with the simulated results along with practical limitations of the methods.

Keywords:

• Transmission
• line
• circuit
• thermal
• rating
• dynamic
• constrained
• simulation
• field measurement
• field test

Acknowledgements

The authors would like to acknowledge the assistance provided by TasNetworks Transmission line team and Hydro Tasmania’s Entura for the transmission line temperature test. Authors also thank TasNetworks Pty Ltd for the permission to publish this work.

Notes

No potential conflict of interest was reported by the authors.