Connections case studies
We said we would produce case studies on different types of HV and EHV connections.
“NPg have provided examples and case studies to help customers understand various grid connection arrangements and costs. Particularly useful to the work we are currently undertaking is the EHV case study for the 20MW generator, which gives examples of the work that needs to be done for the connection including contestable and non-contestables, timescales, and costs.”
Alison Cheetham, Carter Jonas LLP.
At our Connections Customer Forum in November 2015, Alison Cheetham of Carter Jonas LLP told us she used our generation heat map to estmate the likely cost of a connection. She told us that on occasion, she was surprised to find the estimate she received to connect to a substation marked green on our heat map (indicating a significant level of available capacity) was higher than expected.
We understood how this might cause confusion and wanted to do more to help customers understand the likely timescales, costs and resources required to deliver diferent types of connections projects and so we made a commitment to develop case studies on different types of HV and EHV connections projects.
We published our first two case studies in December 2016 on our website, thereby meetng the forecast delivery date in our plan. We then sought to improve our case studies, taking account of other DNOs’ publications. As a result, we published four further case studies based on HV and EHV demand and generaton connections projects.
The additional case studies focused on the following typical connection scenarios:
- a large warehouse requiring a new 3MVA connection (HV);
- a new connecton for a 3MW solar photovoltaic generation scheme (HV);
- a wind farm developer requiring a 20MW connection (EHV);
- an educatonal institute requiring a new frm 35MVA demand connection (EHV).
The case studies give an indication of the timescales taken to deliver each project, an overview of what was involved and a breakdown of the costs which can be used as a benchmark for similar connections projects.
Links to our case studies are included below.View timeline