Function of Energy Management System with batteries

Workshop onEnergy Storage Technologies and Applications

atADB Headquarters on 3-4 April, 2013

Meidensha Corporation

2 2013 ©Meidensha Corporation

S/SS/S

S/S

S/S

Houses

HEMS EV

PV Batt.

CEMS

Distribution Automation

Supply-Demand Ctrl.

DistributionNetworkHydro

P/STurbine

P/S

PVMS

WFMS

Batt.

Batt.Batt.

Batt.

BEMS

FEMS

Buildings

Factories

Wind Farms

Mega-Solar Plants

Prot. Ry.

MEIDEN Smart Technologies

PV

WF

F

BTransmission Network

H

S/S

1. Our Activities in Smart Communities1. Our Activities in Smart Communities

Site for Microgrid

Execute by Period Features

Shimizu Corp.Chugoku Electric PowerMeidensha

2007～

2009

DG:120kW, PV:120kWBAT, EDLC, Quality Assurance Device, Voltage compensator

2. Our Promotion for Renewable Energy Management2. Our Promotion for Renewable Energy Management2-1 NEDO-Hanzhou, China Microgrid Project

Load

MICROGRIDInterconnectionpoint

Load

DisturbanceProducing

Device

Solar powerSystem

Power Quality

Controller

Dynamic Voltage

Compensator

Diesel Generator

Electric Double Layer

CapacitorLead acid

battery

10kV Grid in the UniversityEnergy Management System

Open for island

operation

Control

Renewable energy ratio :more than 50%

When grid connected :Stabilize connected point power flow Suppress voltage dipDuring Island operation :

Stabilize Voltage/ FrequencyImprove power quality Supervisory

2-1 NEDO-Hanzhou, China Microgrid Project System Configuration

2. Our Promotion for Renewable Energy Management2. Our Promotion for Renewable Energy Management

Weather Sensor

実証試験サイトイメージ

5

PV40kW

110kw 40kW±30sec.Village

Controller

Executed by Period Features

Okinawa Elect. Corp.Okinawa EnetechMeidensha

2007～

2010

Minihydro:110kW, PV: 40kWConnect EDLC directly to PV DC circuit

Lao People's Democratic RepublicMini-Hydro P/S

Penstock

Village

PV

Capacitors & Control Eq.

Intake weir

WTG

EDLC

Head tank

Head race

2. Our Promotion for Renewable Energy Management2. Our Promotion for Renewable Energy Management

2-2. NEDO - Demonstrative Research Project to Stabilize Output of Hybrid PV Power Generation Systems (PV + MH + Capacitors) （Laos）

This proposal provides the solution to the miscellaneous fuel issues from the power supply companies at the remote area and islands.

CO2削減

Submarine / HV Transmission

Utilize Renewable EnergyUtilize Renewable Energy

Maintain stable PV output

high cost / demand

endless transportation

cost

BatteryEnergy Management System (EMS)PV Diesel P/S

fluctuating & increasing fuel

cost

Less operation hour/ Less fuel consumption &

CO2

Diesel P/S

Improve reliability

( Micro-Grid Technology )

3. Solutions for power supply 3. Solutions for power supply in remote areain remote area

6

3.1 Example of Demand curve in islands3.1 Example of Demand curve in islands

7

1. Improve PV generation ratio 

Improves the reduction of  fuel  consumption & CO2

Common problem and the solutions for PV ｓｙｓｔｅｍ

Shift Power to Peak time & Lower the D/G peak capacity

PV Power

2. Shift Power to Time of Demand

Power

Demand curve (ex. rural areas)

Time

Power

3.2 Benefits of Micro3.2 Benefits of Micro--grid Systemgrid System[PV & Storage Battery System with EMS][PV & Storage Battery System with EMS]

･ Limit of Installed Capacity of PV is depend on the capacity of Diesel Generators

Improve Shift･ Peak time of generation <> peak time of demand. Peak time of PV generation : 11:00 - 13:00

Peak time of demand in the islands : 18:00 - 20:00

Advantages of PV ｓｙｓｔｅｍ with EMS with Storage Batteries

Over 50% available

Time

Demand curve  (ex. rural areas)

Improved Reduction the fuel  consumption & CO2

Improves reduction of fuel  consumption & CO2

8

4.1 Benefits of Storage Battery System with EMS4.1 Benefits of Storage Battery System with EMS

PV output fluctuates by weather condition

DG stalls when PV fluctuates exceeds the allowable limit for DG in operation

PV output fluctuation

Large fluctuation of PV output

fluctuation within the smallest DG withstand

PV outputfluctuation

Allowable fluctuation for DG

＜

9

Stabilized fluctuation

PV output fluctuation will be stabilized by EMS with Battery within allowable range for DG

Absorbed PV output

＜

4. 需給制御 4.4需給制御の概要

DG

outputBAT

output

+PVoutput

Load

Actual Load

Fluctuating PV output

Stabilized Load to DG

Battery Inverter outputcontrolled by EMS

10

4.24.2 Control Diagram of EMSControl Diagram of EMS

+

+

Fluctuation is absorbed

4.3 Example of operation with EMS4.3 Example of operation with EMS

11

Battery

DG

Load

GP

PV

DG

EDLCGP

Battery

Load

PV

12

4.3A Example of operation with EMS4.3A Example of operation with EMS