De-risking the implementation of real-time thermal ratings

Abstract

This paper addresses the de-risking of real-time thermal ratings (RTTRs) for overhead lines to help build DNO business confidence in the adoption of the technology. Through the use of thermal state estimation with integrated sensors and graceful degradation algorithms, a costeffective RTTR system is being implemented across the 132kV network in North Wales. The system unlocks significant energy yields (up to 14,358 MWh in November 2012 for a single overhead line circuit) whilst minimising the risk of line temperature profile exceedence to a suitably low value.

Investigating the Impact of Real-Time Thermal Ratings on Power Network Reliability

“…When the RTTR system is in the 0 state, the conductor reverts to its static rating. This is a worst case assumption, since in operation some form of graceful degradation could be applied [29]. The MTTF and MTTR values for the conductors were taken from [24].…”

“…The work presented in this paper has not accounted for the benefits of active network management informed by the RTTR. In reality it would be possible for network operators to embed RTTR into their Network Management System (NMS) [29] and use active control to minimize the probability of exceeding the RTTR.…”

Thermal protection implementation of the contact overheadline based on bay controllers of electric transport traction substations in the mining industry

“…Устройство должно соответствовать требованиям быстродействия и селективности [3,16]. Большинство современных методов расчета температуры [15,19,26] провода контактной сети и допустимой токовой нагрузки основаны на решении уравнения теплового баланса, записанного в дифференциальной форме на единицу длины оголенного провода (1 м) при фиксированном значении тока в проводе,…”