The development of Voltage Power Optimisation for Energy Saving

1. Voltage Power Optimisation (VPO)® Prepared for: AUE Conference 2010 The development of Voltage Power Optimisation for Energy Saving Presented by: Nicholas KeeganHigher Education Account Manager

2. Our story • Voltage Power Optimisation (VPO)®is advanced Japanese technology • Invented in 1993 because energyprices were four times higher thanin Europe. • Introduced to the UK – 2001 • Several hundred thousand units installed in Japan. • 100% reliability and safety record. • VPO technology is manufactured exclusively forpowerPerfector for the UK and European markets (230V).

3. VPO – redefining power supply • Ventilation (HVAC) • Lighting / IT • At-source Voltage Power Optimisation (VPO)® • Ensure all equipment runs efficiently

4. 1. Reduce voltage magnitude to optimum level: Vrms 216V – 224V at all points on site Voltage Power Optimisation – definition 2. Protect against transients 3. Filter harmonics 4. Improve balance • Achieve the above points in a single inductive interaction, without recourse to moving parts, electronics or additional sub-transformers. (Efficiency) • Be installed ‘at source’ – i.e. in series with the mains incomer to a building – without the need for a bypass. (Security) • Operate without the need for continuous monitoring. (Safety) • Require no maintenance or servicing. (Fit and forget)

5. The market Voltage Management Transformer tap down?? Voltage Power Optimisation Autotransformers Autotransformer packages Variacs • Single supplier: powerPerfector Plc • A unique inductive device, designed and built in Japan for the purpose of energy saving • Improves voltage quality as well as reducing magnitude: optimisation • Power quality benefits intrinsic to design • Multiple suppliers, multiple manufacturers, multiple countries of origin • An off-the-shelf type of transformer • Old technology originally for control applications • Power quality benefits achieved using bolt-ons: e.g. zig-zag transformers, harmonic filters, power factor correction • Require continuous temperature monitoring • Precise regulation of output voltage • Designed for laboratory applications • Electronic control, moving brush contact • Vulnerable single point of failure • No additional power quality benefits

6. Voltage Management without a retrofit…?→ Transformer tap-down 11kV 440V 429V 418V Primary Secondary • Main supply transformer can sometimes be tapped down • Reductions of 2.5% or 5% typically possible • Does not optimise voltage • Does not improve power quality • Reduces efficiency of supply transformer • Reducing output voltage means adding turns • Increases copper on primary side => increase losses

7. powerPerfector unit – Energy Savings and Power Quality benefits integrated into a single unit High purity copper sheeting used for windings powerPerfector windings

8. Secondary winding • Current transformer • Unreferenced star point • Phase balancing Optimisation settings • Tertiary (condenser) winding • 3rd, 5th and 7th harmonic mitigation Load current • Primary winding • Few turns of high purity copper Vin (240V) Vout (220V) • powerPerfector Voltage Power Optimisation: • Reduce magnitude to optimum level • Protect against transients • Filter harmonics • Improve balance • Single inductive interaction • Installed at source • No need for continuous monitoring • No maintenance

9. powerPerfector PLUS Supply can vary and the output will remain within a fixed optimal band Although designed for energy saving it has the ability to step up voltage if required powerPerfector PLUS allows more sites to benefit from our technology, even those with highly variable or low voltage powerPerfectorPLUS has a 10-year guarantee. The standard powerPerfector The powerPerfectorPLUS

10. 4 step process Using your data we estimate your savings

11. Voltage logging and site load analysis Voltage logging and load analysis to determine your voltage profile and optimisation opportunity and estimate savings

12. Engineering Excellence We survey your site(s) and provide a more detailed proposal Full project management of your installation to PRINCE2 methodology

13. Where can we locate the powerPerfector? Before / after current main switch? Where can we break the circuit? How do we get the unit into position? Meter location?

14. Electrical equipment Electronic • Computers, UPS, VSDs, HF lighting, ‘non-linear’ loads • Reduce supply losses by filtering harmonics Motors • HVAC, AHUs, pumps, compressors • The main source of savings • Optimise voltage level and balance phases to reduce losses Resistive • Electric heaters • Thermostatically controlled heaters see no energy saving Lighting • Optimise voltage to save energy on magnetic ballast or incandescent lighting A real site contains a mixture of load types We will assess the mixture and guarantee the savings

15. IPMVP – Analysis Methodology Before installation After installation • Agree Measurement & Verification Plan with client before installation • Build model ofenergy use • Client records other changes in energy use • Analyse data according to M&V Plan • Full savings report • Case study published with permission of client Before installation After installation – Model

16. Power quality If reactive power data, or other power quality data is available, this provides an insight into the other functions of the powerPerfector.

18. Frobel Grove Unit 830 kVAOptimisation 10%kWh Savings 14.1% kWh Savings p.a. 210,346kWh CO2 Savings p.a. 112,901kg

19. Frobel Grove

20. Garrod BuildingMedical College Unit 210 kVAOptimisation 10%kWh Savings 11.1% kWh Savings p.a. 53,329kWh CO2 Savings p.a. 29,011kg Model Accuracy R2 = 0.8