Navigating NESO Grid Code Compliance
Obtaining an ION from NESO is becoming a more and more challenging task. Historically this was driven primarily by construction completion and testing. In more recent years this is being driven by meeting the paperwork and simulation studies requirements. Power system studies and analysis have moved from being a side issue to construction, to a […]
Ramp Rates for BESS Units and Voltage Change Limits – What is Credible?
Background A key question that has been causing some disagreement between DNOs and BESS operators is how to consider BESS units in terms of ramp rates, and the impact to the Step Voltage Change (SVC) and Rapid Voltage Change (RVC) for P28 compliance. This is not a simple / clear answer and needs some detailed […]
NESO GC0168 – EMT Models for Existing Plants
Introduction NESO is planning to introduce a new Grid Code modification, ‘GC0168 – Submission of Electromagnetic Transient (EMT) Models’. The aim of this modification is to require existing generators already connected to the network to provide an EMT model (in PSCAD) of their plant to NESO. While this may sound straightforward, it could potentially lead […]
NESO Compliance Process – Simulation Studies
At Aurora Power Consulting we routinely carry out compliance studies for large Grid Scale projects. The process can be challenging, and also time consuming. NESO currently are allowed 15 working days to review each UDFS submission, but are currently seeking to increase this to 20 days, and up to 6 weeks for EMT models and […]
GC0141 – RMS & EMT Model Compliance Process
Introduction The recent GC 0141 requirement introduced by NESO are creating significant challenges, costs and delays to the approval process, which is negatively affecting many renewable developers within the UK. The GC0141 requirements, have been present for over a year now, but due to project timescales the requirements are still catching many developers and OEMs […]
Renewable Power – Concept Studies
Failure of a site to meet its required Registered Capacity in MW due to a shortfall in MVAr, is a major cause of delays, and disputes in the renewable energy sector. Such problems are easily avoided by carrying out an initial concept study in the early stages of a project. The aim of a concept […]
Understanding the Benefits and Limitations of EMT and RMS Simulations
Introduction A couple of weeks ago, I wrote a brief post on our company website (Aurora Power Consulting) about EMT modelling, and it generated quite a bit of interest. This made me realise that unless you are directly involved in power system modelling and simulation, these issues can be a bit abstract and are a […]
Load Flow Studies
What is the purpose of a load flow study? Load flow studies are one of the most fundamental study types carried out as part of system analysis; but they are often ignored by companies as they are seen as a bit wooly and non-essential. However, they are actually very useful and tell the designer a […]
