Hitachi’s experience in developing Smart Grids

1 Copyright © 2009, Hitachi, Ltd., All rights reserved. 1

Hitachi’s experience in developing Smart Grids

Shin-ichi INAGE

Renewable Energy & Smart Grid Division, Hitachi Ltd.


Required Technologies for Smart Grids

Renewables Energy storage

AMI

Information

Simulation

Communication

Control

Electric vehicleHeat pumpSmart Grid

(Optimal operation of power gridBy control of Demand/Supply)

Hitachi has a lot of experiences based on our products and technologies for Smart Grids


Mega Solar Plant & Bifacial PV Panel

13MW-class Solar Plant for TEPCO

3 5 7 9 11 13高調波次数

高調波含有率

(％)0

5■ ：新制御■ ：従来

目標値

1

2

3

4

Limit value

Harmonic order

Predecessor

Present

PCS

Co

nte

nt %

Application of Bifacial PV Panel

30

20

10CE

LL

Eff

icie

ncy

(%

)

2005 2006 2007 2008 2009 2010

24.6%


BatteriesBattery room

Lead Acid Battery

■ PCS ＝ 400kW system■ Battery capacity ＝ 1.7MWh

Energy storage model

Wind Power-Kuroshio

Specifications LL1500W-S

Voltage 8V

Energy Capacity 12kW

Expected life time 17 years

SOC range 30-90%

Recycle rate >90%

Load Shifting System


Heat Pump Water Heater System

0.31 0.52 0.78

-69% 1.0

Heatpump

Gas-firing

Oil-firing

Electric

CO2 cycle

5℃ water

90℃ hot water Hot water

Cold waterLow temperature

Heat fromair

Hot-water cylinder

Compressor

High temperature

Air/refrigerant Heat exchanger

Water/refrigerant Heat exchanger

Expansion valve

Overview of system Principle of heat pump water heater

Reduction of CO2 emissions of water heaterApplicable to demand response or load shifting

Comparison of relative CO2 emissions

Gas-firingHeat pump

0.31

1.0-69%

Comparison of relative operation cost


・ This project evaluates system functionality and energy optimization by using closed

Rokkasho-Demonstration Project

Photovoltaic（ Hitachi ）Photovoltaic（ Hitachi ）

OperatorMonitorautomatic

surveillance and control Server

(D-EMS server)PCS

PCS

PV(100kW)

Hub Battery (250kW)

PHV （ Plug-in Hybrid Vehicle ）PCS （ Power Conditioning System)PHV （ Plug-in Hybrid Vehicle ）PCS （ Power Conditioning System)

Charge/Discharge

Control

Charge/Discharge

Control

Charge/Discharge

Mini-Information Hub

Server

ＮＡＳBattery （Ｎ

ＧＫ）

ＮＡＳBattery （Ｎ

ＧＫ）

Heat PumpControl

Heat PumpControl

・Grid Side S

upply and Dem

and m

anagement and control(include

Pow

er generation and Storage)

・Energy Service Integration

Multi family housing


Smart House（ Panasonic ）

Smart House（ Panasonic ）

Smart house（ JWD ）

Smart house（ JWD ）

PHVPHV

ＥＶ＆ＰＨＶ（ Smart Cente

r ）

Futamata Window Power

Generation Site（ JWD ）



Energy Service Information Exchange

PHVCharger

Power Grid

Power Distribution Line Information

Flow ControlInformation

Flow Control

Smart Home/

Building

Surveillance and Control Information Exchange

Surveillance and Control Information Exchange

Smart House（ Toyota ）Smart House（ Toyota ）

Control Center（ Hitachi ）

Control Center（ Hitachi ）

Grid Side Information

↓ ↑ Demand Side Energy Service Information

・Demand side pow

er generation and

storage control(include H

EM

S

functions)

Smart Grids Trial at Rokkasho Village



PCS

PCS

PV(100kW)

Hub Battery (250kW)

Charge/Discharge

ＮＡＳ Battery

（ＮＧＫ）

ＮＡＳ Battery

（ＮＧＫ）

Inter-connection Point



PHVPHV





PHVCharger


ControlCenter

Smart House（ JWD ）


Smart house（ Panasonic ）


Over view of PV

Overview of Solar Power System(100kW)



PCS

PCS

PV(100kW)

Hub Battery (250kW)

Charge/Discharge

ＮＡＳ Battery

（ＮＧＫ）

ＮＡＳ Battery

（ＮＧＫ）




PHVPHV





PHVCharger


ControlCenter





Smart meter Heat Pump

Over view of the Community







The analytical result (24/Sep- 28/Oct,2010)

The self-sustenance ratio is 88% The self-sustenance ratio is 88%


Futamata Window Power Generation Site

Futamata Window Power Generation Site

-88% of the total energy consumption was provided by the electric

power of PV (HUB, Rooftop PV) generation with HUB Power storage.

-88% of the total energy consumption was provided by the electric

power of PV (HUB, Rooftop PV) generation with HUB Power storage.

12%12%

■PV+Hub Storage support ratio is 　　　 95.9% = (iv) / ( (i) + (ii) ) (%)

■PV+Hub Storage support ratio is 　　　 95.9% = (iv) / ( (i) + (ii) ) (%)■PV surplus ratio is 56% = (iv) / ( (iii) ) (%)■PV surplus ratio is 56% = (iv) / ( (iii) ) (%)

DemandDemand

Electric Power charged / discharged Electric Power charged / discharged

PV OutputPV Output

(i)(i)

(ii)(ii)

(iii)(iii)

(iv)(iv)

Operation Results:Operation Results:

Balance of Supply & DemandBalance of Supply & Demand


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.

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.


Thank you for your attentions

Hitachi’s experience in developing Smart Grids

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