Kaloudas, C.

Majithia, S.

Marshall, B.

Ochoa, L.F.

English

In 2011-2012, the UK transmission system operator, National Grid, reported more than 160 voltage excursions in the 400 kV system. Given its close correlation with the national decline in reactive power demand seen during minimum load (i.e., decline in Q/P ratio), it is crucial to understand the corresponding trends to identify cost-effective measures. Understanding the Q/P ratio trends is also of importance to distribution network operators due to the forthcoming European Demand Connection Code that will potentially enforce distribution operators having reactive power exchanges at the interface with transmission, i.e., at the Grid Supply Point (GSP), limited across normal operation, with the design of new networks requiring no export or reactive power during minimum load,. This work presents a thorough analysis of the Q/P ratio trends at GSPs across Great Britain considering yearly and half-hourly demand data from 2005 to 2012 provided by National Grid. In addition, indices are proposed to identify critical GSPs based on the level of reactive power decline and relative size

The University of Manchester - Institutional Repository

Initial assessment of reactive power exchanges at UK grid supply points

https://pure.manchester.ac.uk/ws/files/33528347/FULL_TEXT.PDF

Initial assessment of reactive power exchanges at UK grid supply points

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The University of Manchester - Institutional Repository