Analysis of the potential uncertainty in accommodation of NETSO dispatched services in DSO controlled networks

Abstract

This paper describes the work undertaken by Western Power Distribution (WPD) to assess potential service conflicts where a National Electricity Transmission System Operator (NETSO) dispatched service is located within a Distribution System Operator (DSO) controlled network. A bespoke program was written to integrate with the power system software PSSE to determine generator sensitivities to given constraints for daily and seasonal variation. It also analyses sensitivity variation for intact and all credible circuit fault conditions. The results from this analysis are used to assess multiple Active Network Management (ANM) constraints to determine how the availability of NETSO dispatchable services is dependent on the ANM logic, generator location and network topology. A number of information transfer architectures between the NETSO and DSO are proposed and the risks of service conflicts are considered.