ESO Future Transmission System Stability Analysis
National Grid Electricity System Operator
National Grid TO Innovation Team
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Innovation Funding Incentive
Between 2011 and 2017, it is anticipated that the installed wind generation
capacity in the National Grid transmission network will increase from 1877MW to
8671MW. Together with changes to the network topology, this increase will have
a substantial influence on stability constraint boundary flow limits in the National Grid system. The studies will look at the network configuration of the following
study years and base cases:
- Year 2010/2011: minimum and maximum load profiles
- Year 2014: minimum and maximum load profiles
- Year 2017: minimum and maximum load profiles.
The studies will be based on one network topology per study year (the analysis
of different network schemes is out of the scope of the studies). The generation
profiles and planned network expansions of these years will be obtained from the
National Grid Seven Year Statement (SYS) 2011.
The feasibility study will illustrate the potential of a tool for system operation and
improve our operator capability in the ENCC and hence enable the transmission
system to be operated more efficiently and less risk adverse as the rate of
decarbonisation increases going forward. Such a capability isn’t currently
available; hence the development and implementation will be a first for National Grid delivering an innovative solution in this area, into production within the
As the UK moves towards a decarbonised energy sector, there is an increase in
the scale and volatility of power flows on the power system expected, this is
predominately due to the increased percentage of renewable [intermittent]
generation. 15GW by 2015 and 30GW by 2020.
This analysis will focus on system stability, specifically caused by the large
network flow changes at periods of low demand when a high proportion of
synchronised generation is being generated from renewable sources [offshore
The analysis is going to focus on voltage stability but will also include transient
and dynamic system stability.
DigSilent will produce an independent report with the support from National Grid
experts in modelling system stability, and generator dynamic performance, using
the current off-line model and making approximations of future system
conditions. The analysis will detail system wide conditions and specific boundary
issues as defined by National Grid Engineers.