Hitachi s experience in developing Smart Grids Shin-ichi INAGE

Hitachi’s experience in developing Smart Grids Shin-ichi INAGE Renewable Energy & Smart Grid Division, Hitachi Ltd. 1 Copyright © 2009, Hitachi, Ltd. , All rights reserved. 1

Required Technologies for Smart Grids Hitachi has a lot of experiences based on our products and technologies for Smart Grids Renewables Simulation Energy storage Electric vehicle Heat pump Smart Grid (Optimal operation of power grid By control of Demand/Supply) AMI Control Information 2 Communication Copyright © 2009, Hitachi, Ltd. , All rights reserved. 2

Mega Solar Plant & Bifacial PV Panel PCS Application of Bifacial PV Panel 3 Present Predecessor Limit value Harmonic order CELL Efficiency (%) Content % 13 MW-class Solar Plant for TEPCO 30 24. 6% 20 10 2005 2006 2007 2008 2009 2010 Copyright © 2009, Hitachi, Ltd. , All rights reserved. 3

Lead Acid Battery Specifications LL 1500 W-S Voltage 8 V Energy Capacity 12 k. W Expected life time 17 years SOC range 30 -90% Recycle rate >90% Battery room Batteries Wind Power-Kuroshio 4 Energy storage model ■ PCS ＝ 400 k. W system ■ Battery capacity ＝ 1. 7 MWh Load Shifting System Copyright © 2009, Hitachi, Ltd. , All rights reserved. 4

Heat Pump Water Heater System Reduction of CO 2 emissions of water heater Applicable to demand response or load shifting High temperature 90℃ hot water Hot water Compressor Hot-water cylinder Heat from Air/refrigerant CO 2 Water/refrigerant Heat exchanger cycle Heat exchanger air Expansion valve Low temperature Overview of system -69% 0. 52 Heat pump Gas -firing Cold water Principle of heat pump water heater 1. 0 0. 31 5℃ water -69% 1. 0 0. 78 Oil Electric -firing 0. 31 Heat pump Gas-firing Comparison of relative CO 2 emissions Comparison of relative operation cost 5 Copyright © 2009, Hitachi, Ltd. , All rights reserved. 5

Smart Grids Trial at Rokkasho Village Rokkasho-Demonstration Project ・This project evaluates system functionality and energy optimization by using closed Futamata Window Power Generation Site （JWD） PHV （Plug-in　Hybrid　Vehicle） PCS （Power　Conditioning　System) Power Grid Power Distribution Line ・ Grid Side Supply and Demand management and control(include Power generation and Storage) Energy Service Integration ・ PV(100 k. W) Photovoltaic （Hitachi） ＮＡＳ Battery（Ｎ ＧＫ） Charge/ Discharge PCS Control automatic surveillance and PCS control Server (D-EMS server) Heat Pump Control Mini-Information Hub Operator Server Monitor Grid Side Information Control Center （Hitachi） 　　 　　 ↓ ↑ Demand Side Energy Service　Information Demand side power generation and storage control(include HEMS functions) PHV Charger ・ 6 Exchange Information Flow Control Hub Battery (250 k. W) Charge/ Discharge Energy Service Information Surveillance and Control Information Exchange Multi family housing Smart house Smart House （JWD） （Panasonic） （Toyota） ＥＶ＆ＰＨＶ （Smart Center） PHV Smart Home/ Building Copyright © 2009, Hitachi, Ltd. , All rights reserved. 6

Over view of PV Futamata Window Power Generation Site （JWD） Inter-connection Point PV(100 k. W) Photovoltaic PCS （Hitachi） Hub Battery (250 k. W) Charge/ PCS Discharge Control Center Overview of Solar Power System (100 k. W) ＮＡＳ Battery （ＮＧＫ） PHV Charger Multi family housing 7 Smart house （Panasonic） Smart House （JWD） Smart House （Toyota） PHV Copyright © 2009, Hitachi, Ltd. , All rights reserved. 7

Over view of the Community Futamata Window Power Generation Site （JWD） Smart house （Panasonic） Smart House （JWD） Inter-connection Point PV(100 k. W) Photovoltaic PCS （Hitachi） Hub Battery (250 k. W) Charge/ PCS Discharge Smart House （Toyota） Control Center ＮＡＳ Battery （ＮＧＫ） Smart meter Heat Pump PHV Charger Multi family housing 8 Smart house （Panasonic） Smart House （JWD） Smart House （Toyota） PHV Copyright © 2009, Hitachi, Ltd. , All rights reserved. 8

The analytical result (24/Sep- 28/Oct, 2010) The self-sustenance ratio is 88% Futamata Window Power Generation Site 12% Inter-connection Point -88% of the total energy consumption was provided by the electric power of PV (HUB, Rooftop PV) generation with HUB Power storage. Operation Results: Electric Power charged / discharged PV Output ■PV+Hub Storage support ratio is 　　　 　95. 9% = (iv) / ( (i) + (ii) ) (%) ■PV surplus ratio is 　56% = (iv) / ( (iii) ) (%) Demand (i) (iv) (iii) Balance of Supply & Demand 9 Copyright © 2009, Hitachi, Ltd. , All rights reserved. 9

Conclusions Through actual demonstration projects in Japan, US and other areas, Hitachi is contributing to R&D of Smart Grids technologies. The concept of Smart Grids should vary in each country and customer. Hitachi is willing to respect the existing power gird, utilities and technologies of the customers. We are intending to contribute to achieve "Best Mix" of the customers' existing power grids and our leading-edge technologies as WIN-WIN solution. 10 Copyright © 2009, Hitachi, Ltd. , All rights reserved. 10

Thank you for your attentions 11 Copyright © 2009, Hitachi, Ltd. , All rights reserved. 11