Series compensation system modelling, protection challenges and recommendations for Anglo-Scottish interconnection

Series compensation on the Great British transmission system has been a subject of discussion in recent years. Active work has taken place in collaboration with the utilities involved and protection manufacturers to understand the effects of such series compensation devices on the primary and secondary system including protection equipment. The results of such a study are discussed in detail. Additionally, the spaker brings out some of the recommendations that have been made consequent to the detailed modelling studies. Importantly, this presentation discusses the challenges of having series compensation devices in such a tightly meshed and interconnected system with relatively short transmission lines, particularly focusing on the impacts of the existing protection philosophy.