Electricity North West Limited
Electricity North West Innovation Team
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Innovation Funding Incentive
LV & 11kV Networks
The Low Voltage (LV) voltage regulator is a single-phase voltage regulator which has been adapted for mounting on a wood pole and connecting to the LV feeder to the
property to provide fast response voltage compensation for both over and undervoltages.
Two prototype units from US manufacturer MicroPlanet have been used in a
This project aimed to develop an alternative method of providing a temporary
solution to customer voltage issues.
This project aimed to undertake an extended field trial combined with detailed
monitoring to ascertain both their short and medium term performance and the
potential for full type approval. It is envisaged that this device will primarily used as
a means of rapidly resolving voltage complaints in rural areas and it may be capable
of both temporary and permanent solutions dependent on the type of complaint and
the economics of the situation. Where there is a clear case for network reinforcement,
which would require time to engineer, the voltage regulator could be used to resolve
the complaint whilst a reinforcement scheme is designed, wayleaves negotiated and
construction undertaken. Where the voltage complaint is due to disturbing loads or
unidentified causes it could provide a permanent solution due to the fast response of
the device to voltage dips and sags. Where voltage rise is caused by small scale
embedded generators the regulator could be used to maintain the local network
within statutory voltage limits. There may be an eventual case where LV voltage
regulators are used to maintain statutory voltages, to compensate for a less static
voltage on the 11kV networks due to an increased penetration of distributed
The specific project objectives were to evaluate short term performance whilst
ensuring devices give an appropriate output and improve network voltages to within
statutory limits. Long term performance, ensuring the reliability, longevity and
robustness of the devices. Various network uses, assessing the use of the units as
temporary device for relieving voltage complaints vs more permanent measures.