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Projects: Projects for Investigator
Reference Number NIA_NGET0211
Title Controllable Series Impedance at 275 and 400kV (CSI)
Status Completed
Energy Categories Other Power and Storage Technologies(Electricity transmission and distribution) 100%;
Research Types Applied Research and Development 100%
Science and Technology Fields ENGINEERING AND TECHNOLOGY (Electrical and Electronic Engineering) 100%
UKERC Cross Cutting Characterisation Not Cross-cutting 100%
Principal Investigator Project Contact
No email address given
National Grid Electricity Transmission
Award Type Network Innovation Allowance
Funding Source Ofgem
Start Date 01 June 2017
End Date 01 December 2017
Duration 6 months
Total Grant Value £300,000
Industrial Sectors Power
Region London
Programme Network Innovation Allowance
Investigators Principal Investigator Project Contact , National Grid Electricity Transmission (100.000%)
Web Site http://www.smarternetworks.org/project/NIA_NGET0211
Objectives The objective of this project is to: scope a solution suitable for application at transmission voltages (275kV and 400 kV)produce detailed designs of this solution to enable the manufacture, installation and commissioning of a proof of concept within a National Grid substation trial and demonstrate the reliability, performance and economic viability of this solution to mitigate network constraints. The measures of success that will be used to inform the decision to continue with the project at each of the stage gates are: Stage 1: A concept design for the solution that can be used at 275kV or 400kV,A NOA based assessment of economic viability based on concept design costs. Stage 2 (if it progresses): Schedule of tests to be undertake to test performance and reliability of the units Specifications, design drawings, risk assessments and method statements for the construction and commissioning of the units, Objective evidence of the performance of the devices to add the designed impedance, Confirmation of actual construction and commissioning costs,Stage 3 (if it progresses): Specification, risk assessments and method statements for the decommissioning and dismantling of the devices, Testing schedule to confirm devices remain fully functional after relocation and installation at another site,
Abstract The electricity network is changing at an increasing rate as more renewable generation and smart energy systems are connected. These changes in generation and demand are leading to changes in how power flows over both the transmission and distribution networks. This in turn is leading to the need for parts of the network to be reinforced with new network infrastructure. In some circumstances, if power flow can be controlled, the need for costly reinforcement can be avoided, or at least deferred. At present, control over power flow can be achieved either by constraining generators connected at different points on the network or by using quadrature boosters (QBs) to modify the electrical characteristics of particular circuits on the network. The ability to modify the characteristics of circuits at different times, depending on demand and generation patterns, can release capacity on the network. Alternatively action can be taken to make a permanent step change increase in the capacity of constrained parts of the network by reinforcing the network. A relatively new alternative solution to provide control over power flow has been developed by a US based company. It is designed for distribution voltages and is being trialled on distribution networks Ireland and the US. It may offer a lower cost solution than QBs in some circumstances at transmission voltages. This project seeks to develop the following knowledge which will be necessary if this technology is to be adopted on the GB transmission network: Can the units be modified to operate at transmission voltage and current?How do the modifications affect the way the units are installed (at distribution voltages the units are designed to be clamped around the conductor without need for any other supporting infrastructure)On a like for like basis, is the solution economically competitive as a direct alternative to other constraint mitigating actions?Does the solution offer any other advantages compared to conventional approaches to power flow control or network reinforcement and if so how can these be exploited to provide added value to network customers?Is the solution robust and reliable in the GB context and what factors influence its reliability?How easy is it to install additional power flow control capability as the needs of the network change?Can the solution be removed from one site and installed at another, economically and without material loss of performance and reliability? This project will examine the potential value, design compromises and risks, associated with modifying a controllable series impedance solution designed for distribution voltages, to be suitable for transmission voltages (275kV and 400kV). The project has been separated into three stages described more fully in the scope below. The costs and timescales set out in this PEA relate to stage 1 only. If the project passes the stage gate at the end of stage 1, the information in the PEA will be updated with details of stage 2 before it progresses.Note : Project Documents may be available via the ENA Smarter Networks Portal using the Website link above
Publications (none)
Final Report (none)
Added to Database 09/08/18