Designing Off-Grid PV - solar-media.s3.amazonaws.com 2015... · Designing Off-Grid PV Hybrid system for lower LCOE Solar & Off-Grid Renewable Southeast Asia 2015 Dr. Wuthipong Suponthana,

Designing Off-Grid PV Hybrid system for lower LCOE Solar & Off-Grid Renewable Southeast Asia 2015

Dr. Wuthipong Suponthana, PhD.Leonics Co., Ltd. Thailand.

Phone: +66 8 1815 3787/ Email: [email protected]

Established : 1991 , 25 Years in Business

Years in solar energy : 15 Years

Businesses - Equipment Maker ( Inverter, Charger, System Controller)

- PV-DG-Storage Hybrid System Design & Engineering

- Custom RNE System designing and Engineering

- System Integrating, Installing & commissioning

- Operation and Maintenance service

- Tele-monitoring and performance analyzing service

Experiences in Off-Grid PV : 5kW to 5 MW total Power with storage up to 4.8MWh

Off-Grid Product range : Bi-Directional inverter 150W to 500kW/unit,

MW scale parallel inverters up to 2000kW/system

QA System : Certified ISO 9001 by UL since 1997

: Certified TIS/ISO 9001 since 2001

EM System : Certified TIS/ISO 14001 since 2001

International recognition : Frost&Sullivan Southeast Asia’s 2011: Emerging Inverter Company of the year

HOMER ENERGY - Micro Grid Simulation : Industry Partner Since 2014

Employee Profile : 1 PhD. in Renewable Energy (Hybrid System)

2 PhD. Candidates in Renewable Energy (PV-DG Hybrid)

10 Master Degree in Engineering and Management

226 Employees (Degree in Engineering and Science 12%)

Affiliate Companies : LDM Pty (Singapore), Design, O&M for Micro-Grid test Bed system at Ubin Island

: PT. LGI (Indonesia), Manufacture, Service and Maintenance Inverters in Indonesia

Agendas- PV energy system configuration DC and AC coupling - Efficiency of each type- HOMER verification of the DC-AC coupling design- LCOE of a system under evaluation- Where are the plants using these design concept- How the system performs in real operation- Conclusion

AC Coupling VS DC Coupling

AC coupling Stand Alone

PV-WT Hybrid System

Bi-Directional Inverter

Grid Connect Inverter

DC coupling Stand Alone

PV-WT Hybrid System

InverterCharge Controller

AC Load

AC Load

Efficiency from PV to supply load = 96% Efficiency from PV to supply load = 93.1%

96% 95%

98%

Real Load = Load + BDI Loss

Day time system efficiency when PV supply Load

7th Meeting of the ASIA SOLAR ENERGY FORUM, Oct 17, 2014 : Dr. Wuthipong Suponthana, PhD.


PV-WT Hybrid System




PV-WT Hybrid System


AC Load

AC Load

96%

98%


90%

90%

95%

82.08% from 100% of PV output


Day time system efficiency when PV charge battery

Efficiency of PV energy path to charge Battery = 88.2%

Efficiency of PV energy path to charge Battery = 82.08%


BDI must be size

big to handle charge

Current from PV


PV-WT Hybrid System




PV-WT Hybrid System


AC Load

AC Load

95%

95%98%


95%

95%


Efficiency from PV to battery and Back to supply load = 74.07%

Efficiency from PV to battery and Back to supply load = 79.6%

Night time system overall efficiency when battery supply load


95%


- Both of them are good in different time- DC coupling is better when PV is used to charge battery- AC coupling is better when PV is used to direct supply

load

System Efficiency

Day time chargein to Battery

Day time supply to Load

Night time round trip supply load

DC Coupling 88.20% 93.1% 79.60%

AC Coupling 82.08% 96.0% 74.07%


Hybrid DC-AC design approachHybrid DC-AC Coupling can improve COE of system

HOMER Pro Simulation with Different

Load Profile

7th Meeting of the ASIA SOLAR ENERGY FORUM, Oct 17, 2014 : Dr. Wuthipong

Suponthana, PhD.

Bi-directionalBattery Inverter 50 kW

PV on AC Coupling25 kWp

PV on DC Coupling 125kWp

Grid Connect Inverter 25 kW

MPPT Charge Controller125 kW

Diesel Generator50kW

GS

Battery480Vdc 4,800 kWh

HOMER Pro Simulation Conditions

- 480 kWh per day

- 150 kWp PV

- 480 kWh Storage

- 5.14 kWh/day.m2

Flat Load 24h

1 = DG only 2 = DG-BDI-Battery

1

2

- DG power plant alone is better than

charge and discharge battery by DG

3

PV DC Coupling 4

PV AC coupling

5

PV DC-AC coupling

3

4

5

DC Coupling

AC Coupling

DC-AC Coupling

Flat Load profile

3

4

5

3

PV DC Coupling

4

PV AC coupling5

PV DC-AC coupling

DC Coupling

AC Coupling

DC-AC Coupling

Low Day-time load profile

3

PV DC Coupling

4

PV AC coupling5

PV DC-AC coupling

3

4

5

DC Coupling

AC Coupling

DC-AC Coupling

High Day-time load profile

Effect if Day-Night time load ratio and COE

A Sample of LCOE of Plant Design by using DC and AC coupling

- 18 years project life

- PV at DC coupling 70%

- PV at AC coupling 30%

- Lead Acid battery

- Diesel Generators

- Power conditioning Equipment

- Different PV : Diesel Energy Ratio (70%, 90% and 99%)

- Interest rate at 6%

- Include Installation and logistic (case of install in Thailand)

- Include O&M

% pf PV % of Fuel Produce CO2

Design 90.00% 10.00% 123 kg/day

Sim. 90.14%

Irradiation 5.61 kWh/m2.day

Ambient Temp. 32oC 1787215.20 kWh/Year

Peak Load 317.34 kW Aver. Load 204.02 kW/h Total Load 4896.48 kWh/Day

# of Inverter GTP-4030 30 kW

12 Units

MTP-4113 H

200.00 2 units

Back Up DG Power rating 200.00 kW AC Coupling PV 336.06 kWp

Consume Diesel Fuel 172.92 Liters/day Installation Area 2882.25 m2

Fuel Consumption rate 0.28 Liter/kWh

SCM480300 Battery 10000.00 Ah

12 480 Vdc

Units 240.00 Cells Annual Load Energy consumption 1,787,215 kWh

Annual Energy generated form PV 2,001,977 kWh

Expect Batt Life 4.73 Years Annual Diesel fuel consumption 63,115 Liters

Replace fuel @ Energy Price 0.149 IPP 0.340 USD/kWh

DC Coupling PV 962.97 kWp Annual Diesel fuel reduction -63,115 Liters

Installation Area 8259.08 m2Annual Diesel fuel amount saving -34,302 USD

Total Investment 2,702,773 USD

Simple Pay back period 11.67 Years

Project Life 18 Year

Confidential information, this hybrid minigrid design is property of Leonics Co., Ltd., may not reproduce without prio notice to Leonics Co., Ltd. Project IRR reduce use of fuel -6.19% IPP 14.83% %

Averag daily system operation condition and consumptions Site Name :

Project Owner : Site Location (Lat./Long.) :o N

o E

Design by : Wuthipong S. Version/Rev. : 1A Date : 11-Nov-15 Altitude : Meter (ASL)

LEONICS MTP 410 Bidirectiona Inverter

LEONICS SCM charger

15

8.7

15

8.7

15

8.7

15

8.7

15

8.7

15

8.7

18

4.1

17

4.5

18

4.1

19

0.4

19

3.6

20

6.3

21

5.8

21

5.8

21

5.8

20

6.3

19

6.7

19

0.4

20

6.3 31

7.3

30

1.5

28

5.6

25

3.9

20

6.3

0.00

200.00

400.00

kW

Real load Profile

LEONICS Grid Connected Inverter

Leonics Hybrid Design & Simulation tools

Output Performance (from Diagram Sheet)

Yr 5.62

Ya(AC) 4.97

Yf(AC) 4.52

nLoad 95.7%

Lc 0.89

Solar Energy Ratio 70.98%

PRS 83.72%

PR(AC) 80.50%

PR(DC) 84.93%

LCOE without replacement 0.2434

Ein 8,165

Euse 7,810

EtoLoad 4,896

Consume Back up by Fuel 467

Payback Period from reduce Fuel 8.89

Fuel Price at site 0.76

5.62

4.88

4.42

95.6%

1.40

90.14%

74.77%

78.71%

73.40%

0.2157

9,255

8,849

4,896

173

8.34

0.76

5.62 kWh/kWp.day

4.69 kWh/kWp.day

4.25 kWh/kWp.day

95.9%

1.89 kWh/kWp.day

99.42%

66.11%

75.64%

63.36%

0.2211 USD/kWh

9,832 kWh/day

9,433 kWh/day

4,896 kWh/day

11 liter/day

8.98 Year

0.76 USD/kWh

LCOE from different ratio of PV and Diesel Fuel

Where is sample installation sites?

MW scale Stand-Alone Hybrid Mini-Grid System

Kema850 kWp (PV)

850 kW (I)4,800 kWh (B)1600 kW (DG)

Banggi1,200 kWp (PV)

2,075 kW (I)2,880 kWh (B)

1,650 kVA (DG)

Tanjung Labian1,212 kWp (PV)

1,650 kW (I)4,320 kWh (B)1250 kW (DG)

Bario906 kWp (PV)1,100 kW (I)

3,860 kWh (B)1,443 kVA (DG)

(PV) = Photovoltaic Module, (I) = BDI + GCI, (B) = Battery, (DG) = Diesel Generator

3.45MW

3.30MW

4.93MW

4.11MW

X.xxMW

Total Power of INV+DG+PV

T&C 14-Nov-12

T&C 19-Nov-12

T&C 23-Sep-15

T&

C 3

-Fe

b-1

4

Main Contractor : USAHA SIRIMAS SDN. BHD.COD on : 25 January 2014

4.93 MW PV-DG Hybrid System, Banggi Island 2, Sabah, Malaysia(1,200kWp, 1100kWinv, 975kWGC inv, DG 1,650kW)

4.93 MW PV-DG Hybrid System, Banggi Island 2, Sabah, Malaysia(1,200kWp, 1100kWinv, 975kWGC inv, DG 1,650kW)

Bi-directionalBattery Inverter 300kW x 3 = 900kW

Grid Connect Inverter 250kW x 3 = 750kW

MPPT Charge Controller70 kW x3 = 210kW

GS

Diesel Generator350kW 500kW 500kW

GS GS

PV on AC CouplingRemote Station

Grid Connect Inverter 75kW x 3 = 225kW

Battery480Vdc 720 kWh

Battery480Vdc 2,880 kWh

PV Module 1,000 + 200 kWp

BDI 3

BDI 2

BDI 1

Charge Controller

GCI 3

GCI 2

GCI 1

Battery Bank 1 Battery Bank 2

Battery Bank 3

DG 5400kW DG 4

400kW DG 3250kW DG 2

200kW

DG 1200kW

Implementing PV-DG Hybrid system design

At a Collage in Cambodia

DG : 100 KVA

BDI : 75 kVA/kW

PV Inv : 30 kW x 2 with PV 70 kWp (AC coupling)

SCC : 28 kW x 2 with PV 54 kWp (DC coupling)

Battery : 1500 Ah 240 Vdc

Conclusions

- Using DC and AC coupling can get lower LCOE- There is a ration of PV : DG energy that provide

lowest LCOE- The plant designed by using DC-AC coupling concept

can operate well in small plant to MW scale plant for more than 3 years

Thank you for bring us electricity

Children in Papua, Indonesia at the moment that they have electricity, Dec 2012

www.leonics.com

www.leonics.co.th

http://www.leonics.com/

http://www.leonics.co.th/

Documents

Designing Off-Grid PV - solar-media.s3.amazonaws.com 2015... · Designing Off-Grid PV Hybrid system for lower LCOE Solar & Off-Grid Renewable Southeast Asia 2015 Dr. Wuthipong Suponthana,