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HUAWEI TECHNOLOGIES CO., LTD.
www.huawei.com
Future Technical Trends
of
Next Generation Solar Inverter
HUAWEI TECHNOLOGIES CO., LTD. Page 2
Innovating to Meet Future Challenges
Digital Energy, Leading the
Technical Innovation
HUAWEI TECHNOLOGIES CO., LTD. Page 3
Electric Energy - Driving Force of Human Civilization
NOW
HUAWEI TECHNOLOGIES CO., LTD. Page 4
FUTURE 2030
Electric Energy - Driving Force of Human Civilization
HUAWEI TECHNOLOGIES CO., LTD. Page 5
Wind and Hydro Thermal and Photovoltaic Nuclear Fossil
Low Cost/kWh High
High Energy Density Low
Diversified Resources – From Nuclear to Solar Power
HUAWEI TECHNOLOGIES CO., LTD. Page 6
Photovoltaic - Opportunities and Risks
Manufacturing cost of traditional crystalline
modules is continuously decreasing. In last
5 years, China Top level manufacturers
have reduced cost by more than 50%. In
next 3 years, they will endeavor to reduce
by 30% more.
Source:GTM Research 2012
2013, China PV new installation reached
11.3GW, which is the largest one in the world.
Japan is No. 2 with new installation of 6.9GW;
USA is the third one with 4.75GW.
In 2014, planned new installation of China is
14 GW , of which 8GW is distributed PV
Plants.
China major energy base is in west area,
while the main load is in east coastal area.
Energy yield in northwest PV plants is
even much more than local consumption.
How to transmit solar power to consumers
thousands miles away is the largest
challenge to existing power system.
Annual Cost Reduction of Module Fast Increasing Global Installation Grid Integration is Future Issue
Global Accumulative Installation (GW)
HUAWEI TECHNOLOGIES CO., LTD. Page 7
Digital Energy , Leading the
Technical Innovation
HUAWEI TECHNOLOGIES CO., LTD. Page 8
Future Inverter Technology - Digital Plus Power Electronics
Two Domain Combined,Create 10X Space for Innovation
Power Semiconductor
Circuit Topology Thermal
Management Grid Integration
Distributed Architecture
Intelligent
monitoring
10x Power Electronics Digital Technology
HUAWEI TECHNOLOGIES CO., LTD. Page 9
Power Semiconductor Develop SiC/GaN Wide-bandgap Power Device,Cut Down >50% Power Loss
► Reduce loss more than 50 %, increase
energy yield greatly
► Operating temperature 4X of silicon
devices , enhance reliability
► Switching speed 10X of Silicon devices,
► Higher operating voltage,adapted to
future high-voltage PV systems (1500V?)
Semiconductor technology enable the revolution
of power electronics
Wide-bandgap device with higher performance
than current Si device
High effective
Industry
inverter
Power vehicle
Wind
power
Output Power
Frequency(Hz)
PV inverter
(Regulator)
High frequency applications
PV
inverter
HUAWEI TECHNOLOGIES CO., LTD. Page 10
Circuit Architecture - from 2/3 Level to X Level Topology
Copper price continue to rise
Si chip price (per A) decline steadily
2 Level & 3 Level Topologies
Two level topology (286) Output waveform
Power CPU Output waveform
LC filtering Output waveform
1.2kV 400A
Switching Frequency 3kHz
Three level topology (386) Output waveform
1.2kV 600A
Switching Frequency 10kHz
Power CPU Output waveform
LC filtering Output waveform
► Efficiency of the inverter increased;
► Filter inductor cost and volume greatly
decrease ;
► Grid-connected harmonic decline,
improve electricity quality;
Multi-level Power Conversion
Highest 67.115 Lowest18.8377 Average46.8292
5 years Copper prices
RM
B/K
g
386 -> X86
HUAWEI TECHNOLOGIES CO., LTD. Page 11
Thermal Management – Excellent Design to Improve System
Reliability Chip temperature vs.
Device Lifetime
Company C
98.7℃
Thermal Testing Results
Company B
84.8℃
Company A
80℃
New Thermal Management Technologies
Heatsink
design and
smart flux
management
Simulate
and
optimize
3D VC/New
high Thermal
conductivity
materials
HUAWEI TECHNOLOGIES CO., LTD. Page 12
Grid Integration – Friendly Grid Connection by Inverter as a
Smart Unit of Power System
Passively Withstand Voltage Ride-through
Italy
China
Spain
Germany
15 20 25
50
75 80 85 90
100
150 1000 1200 750 1500 2000 500
Voltage[%]
[ms]
Ideal VRT Curve Intelligent Grid Unit :
The inverter will change from a simple power equipment to an intelligent grid unit, actively support the stability of Frequency and Voltage inside large scale power systems.
Actively Improve the Power Quality of the Grid
HUAWEI TECHNOLOGIES CO., LTD. Page 13
Distributed Architecture – Accurate String-level Control to
Maximize Energy Yield of PV Plants
String Inverter 1MW Solution
Central Inverter 1MW Solution
直流汇流箱
交流汇流箱升压变
升压变14个汇流箱
VS Multi-MPPT: 120 Core“CPU” VS 2 Core“CPU”
Accurate MPP Tracking, greatly increase yield
电压(V)
Pmax:最大功率点
电流(I)
3 X 40= 120 MPPT
MPPT1
MPPT2
MPPT3
1 X 2 = 2 MPPT
MPPT1
HUAWEI TECHNOLOGIES CO., LTD. Page 14
Distributed Architecture – Accurate String-level Control to
Maximize Energy Yield of PV Plants
Increase Yields 4~5%
Source:http://www.danfoss.com/NR/rdonlyres/6507E2ED-D210-422C-976B-6E8DC943B65D/0/DKSIPM204A102_Eggebek_TechCaseStudy_WEB.pdf
Project Information
Total Capacity 83.932 MW
PV Modules 5 types, 188Wp to 240Wp
Danfoss Inverter
5061pcs 15kW 257pcs 10kW
Total Area 1,288,802 m2
Commissioning End of 2011
Eggebek 84 MWp PV plants with 5318pcs Danfoss String Inverters (installed in 2011)
HUAWEI TECHNOLOGIES CO., LTD. Page 15
Intelligent Monitoring - Bit Manage Watt
With the popularization of 4G and the coming of Mobile Era, more and more electric energy will be digitized and smartly managed. The future trend is to integrate digital information technology with power electronics technology, achieve smart energy management.
PV Module Management Easy Maintenance
HUAWEI TECHNOLOGIES CO., LTD. Page 16 Facing Challenges, Win The Future
Copyright© 2013 Huawei Technologies Co., Ltd. All Rights Reserved.
The information in this document may contain predictive statements including, without limitation, statements regarding the future financial and
operating results, future product portfolio, new technology, etc. There are a number of factors that could cause actual results and developments
to differ materially from those expressed or implied in the predictive statements. Therefore, such information is provided for reference purpose
only and constitutes neither an offer nor an acceptance. Huawei may change the information at any time without notice.