Network Curtailment Costs and a Way Forward?
An interesting article below from the BBC discussing the ongoing issue with constraints, and the overlap to zonal pricing. It is a hot debate, with a certain amount of heat on both sides, and as is often the case on contentious issues, the important detail often gets lost in the soundbites. These issues are a […]
NESO – Sub Synchronous Oscillations
Introduction NESO have been pushing for the majority of developers to carry out Sub Synchronous Oscillation (SSO) studies for all new generation systems connected to the network. This has always been the case for HVDC links, but now includes, Storage, Wind and Solar PV. Note this only applies to sites that fall under the Grid […]
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 […]
Frequency Distribution of the GB Power System
Ross Falconer, Head of Power Systems, Aurora Power Consulting Currently we are working on an innovation project with Northern Power Grid (NPG) to develop their policy for assessing voltage fluctuations on the grid caused by Battery Energy Storage Systems (BESS’s). As we decarbonise the grid and move away from traditional generation sources like coal and […]
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 […]