Future Technical Trends of Next Generation Solar Inverter
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1 Future Technical Trends of Next Generation Solar Inverter HUAWEI TECHNOLOGIES CO., LTD.
2 Innovating to Meet Future Challenges Digital Energy, Leading the Technical Innovation HUAWEI TECHNOLOGIES CO., LTD. Page 2
3 Electric Energy - Driving Force of Human Civilization NOW HUAWEI TECHNOLOGIES CO., LTD. Page 3
4 Electric Energy - Driving Force of Human Civilization FUTURE 2030 HUAWEI TECHNOLOGIES CO., LTD. Page 4
5 Diversified Resources From Nuclear to Solar Power Nuclear Fossil Wind and Hydro Thermal and Photovoltaic High Energy Density Low Low Cost/kWh High HUAWEI TECHNOLOGIES CO., LTD. Page 5
6 Photovoltaic - Opportunities and Risks Annual Cost Reduction of Module Fast Increasing Global Installation Grid Integration is Future Issue Global Accumulative Installation (GW) 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 , 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. HUAWEI TECHNOLOGIES CO., LTD. Page 6
7 Digital Energy, Leading the Technical Innovation HUAWEI TECHNOLOGIES CO., LTD. Page 7
8 Future Inverter Technology - Digital Plus Power Electronics Two Domain Combined,Create 10X Space for Innovation Power Electronics 10x Digital Technology Power Semiconductor Circuit Topology Thermal Management Grid Integration Distributed Architecture Intelligent monitoring HUAWEI TECHNOLOGIES CO., LTD. Page 8
9 Power Semiconductor Develop SiC/GaN Wide-bandgap Power Device,Cut Down >50% Power Loss Semiconductor technology enable the revolution of power electronics Wide-bandgap device with higher performance than current Si device Output Power Wind power Power vehicle High effective Industry inverter PV inverter (Regulator) PV inverter High frequency applications Reduce loss more than 50 %, increase energy yield greatly Operating temperature 4X of silicon devices, enhance reliability Frequency(Hz) Switching speed 10X of Silicon devices, Higher operating voltage,adapted to future high-voltage PV systems (1500V?) HUAWEI TECHNOLOGIES CO., LTD. Page 9
10 Circuit Architecture - from 2/3 Level to X Level Topology Copper price continue to rise 2 Level & 3 Level Topologies Multi-level Power Conversion Highest Lowest Average years Copper prices Two level topology (286) Output waveform 386 -> X86 RMB/Kg 1.2kV 400A Power CPU Output waveform LC filtering Output waveform Si chip price (per A) decline steadily Switching Frequency 3kHz Power CPU Output waveform LC filtering Output waveform Three level topology (386) 1.2kV 600A Switching Frequency 10kHz Output waveform Efficiency of the inverter increased; Filter inductor cost and volume greatly decrease ; Grid-connected harmonic decline, improve electricity quality; HUAWEI TECHNOLOGIES CO., LTD. Page 10
11 Thermal Management Excellent Design to Improve System Reliability Chip temperature vs. Device Lifetime Thermal Testing Results New Thermal Management Technologies Company A 80 Simulate and optimize Company B 84.8 Heatsink design and smart flux management Company C D VC/New high Thermal conductivity materials HUAWEI TECHNOLOGIES CO., LTD. Page 11
12 Grid Integration Friendly Grid Connection by Inverter as a Smart Unit of Power System Passively Withstand Voltage Ride-through Actively Improve the Power Quality of the Grid Voltage[%] [ms] Ideal VRT Curve Italy Intelligent Grid Unit : Spain The inverter will change from a simple power equipment to an intelligent China Germany grid unit, actively support the stability of Frequency and Voltage inside large scale power systems. HUAWEI TECHNOLOGIES CO., LTD. Page 12
13 Distributed Architecture Accurate String-level Control to Maximize Energy Yield of PV Plants String Inverter 1MW Solution VS Central Inverter 1MW Solution Multi-MPPT: 120 Core CPU VS 2 Core CPU Accurate MPP Tracking, greatly increase yield 直流汇流箱 MPPT1 MPPT2 MPPT3 3 X 40= 120 MPPT 交流汇流箱 升压变 升压变 14 个汇流箱 电流 (I) Pmax: 最大功率点 MPPT1 电压 (V) 1 X 2 = 2 MPPT HUAWEI TECHNOLOGIES CO., LTD. Page 13
14 Distributed Architecture Accurate String-level Control to Maximize Energy Yield of PV Plants Eggebek 84 MWp PV plants with 5318pcs Danfoss String Inverters (installed in 2011) Project Information Total Capacity PV Modules Danfoss Inverter MW 5 types, 188Wp to 240Wp 5061pcs 15kW 257pcs 10kW Total Area 1,288,802 m 2 Commissioning End of 2011 Increase Yields 4~5% Source: HUAWEI TECHNOLOGIES CO., LTD. Page 14
15 Intelligent Monitoring - Bit Manage Watt PV Module Management Easy Maintenance 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. HUAWEI TECHNOLOGIES CO., LTD. Page 15
16 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. HUAWEI TECHNOLOGIES CO., LTD. Facing Challenges, Win The Future Page 16
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