National Grid Electricity System Operator
National Grid TO Innovation Team
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Innovation Funding Incentive
Gas Distribution Networks
Introducing a voltage reduction system into incoming supplies is common
practice for office and industrial installations and large savings in energy
consumption are claimed.
This pilot is to install an EMS Powerstar Voltage Optimiser on one of the
incoming LVAC supplies at Rayleigh substation and to carry out an evaluation of
the benefits and any deployment issues over a period of 1 year.
There are 2 proposed options with different potential benefits:
- 1 x 500kVA unit on one transformer, cost £27.5k inc. installation
- 2 x 500kVA units, 1 on each transformer, cost £54.75k. Inc. Installation.
This solution has already been described in a Strategy Brief and the pilot
installation at Rayleigh has been supported in principle at EEPIG in April 2011.
This Project is to pilot the installation of a Voltage Optimiser at Rayleigh
substation. This is to evaluate the claimed benefits of energy savings on
electricity consumption by reducing the incoming LVAC supply voltage by a fixed
amount into the site LVAC board. There are also additional benefits which are
due the reduced heating and insulation stresses on the substation connected
equipment, which should improve asset life and reliability.