Transient event detection and analysis of the GB transmission system using synchrophasor measurements

摘要

The inclusion of Phasor Measurement Units (PMUs) to the electricity network of Great Britain is providing insight beyond the steady state, into the behaviour of the power system. Synchronised measurements, from a fair geographical distribution of devices are allowing the regional differences, following transient events, to be examined. This is forcing revision of the previous assumption of network-wide behaviour. In this paper a number of transmission level incidents, detected by two independent wide area monitoring systems (WAMS), installed at both the transmission level and domestic supply, have been analysed, with a focus on the events impact to different areas of the grid. The analysis identifies the seemingly obvious impact to voltage magnitude but also the regional variation in frequency, df/dt and hence system inertia.