Network Design System Stability
National Grid Electricity System Operator
National Grid TO Innovation Team
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Innovation Funding Incentive
Gas Distribution Networks
This programme of work consists of the following projects:
- Review of Voltage Dependency of Load
- Impact of series capacitors on transmission system
- Review of low voltage demand disconnection schemes
- Assessment of SVCs for use in Constant MVAr mode
This programme addresses issues relating to system stability by
ensuring assets such as SVCs are utilised effectively and that policy
regarding demand disconnection and the use of series capacitors is
up to date.
This programme of work investigates National Grid’s policy and asset
capability in order to better understand and ensure optimum network
design and operation.
The programme is made up of several projects. A review of the
voltage dependency of load will review current assumptions
regarding composite load models at GSP and BSP locations based
on an updated breakdown of load classes. It will also investigate the
impact of distributed generation or other voltage control
schemes/devices connected at voltages below that of the GSP and
investigate the potential impact of new load types such as energy
efficient lighting and the further use of switched mode power
National Grid is involved in a project with manufacturers to explore
the use of series capacitors to maximise the transfer capability of the
available transmission system.
An assessment of the effectiveness of low voltage demand
disconnection schemes to minimise the spread of voltage collapse
under severe system disturbance conditions is also being carried out.
The final project in the programme looks at the use of SVCs in an
alternative control mode that potentially reduces the noise generated
and the amount of control room action needed.