This paper reviews the existing 11kV cabling and 11kV switchgear of the given electrical network to assess the present capacity to carry continuous load, and the effect that new developments will consequently have on the existing network's ability to support the additional loads by using ETAP.This paper has been produced to set out the results of a modelling exercise that has been undertaken on one of our client's main 11kV distribution network.Load flow assessment shows that out of 8 proposed developments (PDs), four PDs can be accommodated in the existing network while four PDs cannot be accommodated in the existing network individually.It is found that in this study the existing network in some places is near its capacity, and indeed for some sections of the network the 11kV cabling is likely to overload under certain switching scenarios, especially when the existing's network embedded generation is not operating.This presents the existing network with significant issues when switching the network for maintenance purposes or to isolate a fault.It also demonstrates that this network needs to ensure that its embedded generation has a very high availability.
Ensuring the reliability and efficiency of electricity distribution networks requires a proactive framework that effectively manages and mitigates the risks associated with grid component failures. The Common Network Assets Methodology (CNAIM), widely used for regulation in the United Kingdom, stands as a state-of-the-art example of integrating Component Risk Models in incentive regulation. However, its limitations become apparent when it comes to accurately reflecting the impact of digital applications, such as dynamic line rating. To address this issue, this paper proposes a novel approach by incorporating the impact of digitalisation into CNAIM’s risk calculation, utilizing Digitalisation Key Performance Indicators (KPIs) specifically designed for Distribution Network Operators (DNOs). This offers a promising pathway for further advancements in accurately representing asset risks and the impacts of digital applications. Embracing this comprehensive consideration, along with a risk-based approach to managing distribution grid assets, becomes fundamental in navigating the challenges faced by DNOs both in the present and the future.
