The National Grid


It has long been asked of us, how do we know that the ‘grid’ won’t change the output from 242V down to 220V? The answer is that the National Grid is a client and advocate of powerPerfector technology.

The distribution voltage on the grid has historically been 242V on average. powerPerfector brings that voltage down to 220V, conditioning the power and delivering energy, cost and carbon savings.

powerPerfector is part of a jigsaw of measures introduced within National Grid. As a responsible business, it pro-actively manages existing and future environmental risks and impacts.

The Problem

The cost of an overhaul to the networks that supply our homes and businesses is prohibitive. As such, National Grid will continue to juggle a 242V grid. This is a task that is becoming increasingly difficult, as more forms of sustainable power are added to the grid.

Whilst in the past the National Grid had the task of prioritising and balancing the UK’s electricity demand using the traditional sources of nuclear, coal, gas, hydro-electric and oil generation, now a raft of wind farms, CHP, biomass plants and domestic micro-generation make the job infinitely more complicated.

The intermittent nature of these forms of energy means that, when there is a drop in generation from renewables, other forms of generation are called upon to fill the shortfall. This switching between sources, to ensure a constant supply of energy, has a knock-on effect on the quality of the power supplied to our homes and businesses, increasing the number of transients or spikes on the supply.

What is more, all electric components create harmonic distortion. The more gadgets we have the more harmonics are created locally. Power spikes and harmonic distortion can damage sensitive equipment and increase the regularity with which organisations have to carry out maintenance and replace electrical equipment.

National Grid is a 24/7 operation and powerPerfector protects the organisation from these power quality issues, ensuring that the difficult task of juggling the nation’s energy supply can continue uninterrupted.

Our Solution

In January and March 2010 three VPO® units were installed at the Windsor Street, Hollinwood and Slough sites.

The powerPerfectors are ensuring that National Grid operates at a higher level of efficiency, as well as benefiting from improved power quality and protection from common transients.

The Results

Our analysis of the Slough site indicates that VPO® has reduced energy consumption by 11.8%. The savings achieved by the powerPerfector project at the Windsor Street site are between 12.5 and 16.8%, whilst savings of 10% were achieved at Hollinwood.

All of the savings figures were evaluated using the International Performance Measurement and Verification Protocol (IPMVP), the world’s only measurement and verification standard for energy saving projects.

powerPerfector were the first energy efficiency technology provider in the UK to use this international standard and all our projects are now evaluated by EEVS Insight.
The trial of powerPerfector at three sites has led to further opportunities being explored within the National Grid.

The Overview

  • 211,157 kWh Saved
  • 118,766 CO2kg Saved
  • £17,693 Saved