Next Generation Power Electronic. Converters for Residential Renewable Energy Applications

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1 Next Generation Power Electronic Click to edit Master title style Converters for Residential Renewable Energy Applications Andrii Chub Power Electronics Group Department of Electrical Engineering Tallinn University of Technology, Estonia

2 Buildings are responsible for of energy consumption and of CO 2 emissions in the EU All new buildings must be by 31 Dec. (public buildings by 31 Dec. 2018) energy efficiency increase by 20%, reduction of CO 2 emissions by 20%, and 2 / 15 Re-configuration of the European electricity grid into of (commercial and ) with high impact of

3 Dmitri Vinnikov Andrii Chub, Tanel Jalakas, Janis Zakis F. Blaabjerg (DK), F.Z. Peng (USA), R. Strzelecki (PL), M. Adamowicz (PL), Y. Siwakoti (DK), H. Abu-Rub (QA) overcome limitations of available solutions and improve overall performance of energy generation systems Power Electronics Group of TUT is the in the field of impedance-source galvanically isolated DC-DC converters intended for grid integration of 3 / 15 design of small renewable and alternative energy generation units for residential and small commercial buildings

4 Galvanically Isolated Impedance-Source DC-DC Converters Transformer based With combined energy transfer Coupled inductors based Half-bridge Three-phase full-bridge Single-phase full-bridge Push-pull Singleswitch Singleswitch Single-phase full-bridge Push-pull Single-switch Push-pull ZS TZS T ZS IYS YS ZS Asymmetrical with 1 capacitor ISN with separated inductors ISN with separated inductors ISN with separated inductors ISN with 1 inductor ISN with 1 inductor ISN with 1 inductor ISN with 1 inductor Asymmetrical with 2 capacitors ISN with coupled inductor Series resonant bridge ISN with coupled inductor ISN with 2 inductors ISN with 2 inductors ISN with 2 inductors ISN with 2 inductors Symmetrical Primary series resonant bridge Cascaded capacitor assisted extended boost ISN Interleaved with coupled ISN With integrated coupled inductor With composite coupled inductor Hybrid secondary series resonant bridge With synchronous rectification Interleaved with two ISNs 4 / 15 : quasi-z-source; ZS: Z-source; TZS: trans-z-source; T: trans-quasi-z-source; YS: Y-source; IYS: improved Y-source; ISN: impedance source network. More than 20 new converter topologies proposed A. Chub, D. Vinnikov, F. Blaabjerg and F. Z. Peng, "A Review of Galvanically Isolated Impedance-Source DC DC Converters," IEEE Trans. Power Electron., vol. 31, no. 4, pp , April 2016.

5 PV module current, A ISC IMP BOOST MODE Maximum power point 1 BUCK MODE Maximum power point 3 P-V-3 PMP3 PMP1 Maximum power point 2 I-V-2 I-V-1 P-V-2 Partial shading NORMAL MODE P-V-1 I-V-3 PMP2 Multiple orientations 0 VMP2 VMP1 VMP3 5 / W/m W/m W/m W/m 2 VOC 200 W/m Optimal use of roof 2 surface PV module voltage, V Small systems

6 PEG in cooperation with has developed first hybrid of two technologies: isolated microinverter and non-isolated power optimizer the 6 / 15

7 Hybrid series-resonant full-bridge converter topology: IPV L1 * * C2 L2 S1 S3 ITX,pr TX Lr=Llk Ilk C1 D1 VPV S C1 V1 S2 S4 VTX,pr * * 1:n Lm Im VTX,sec C2 D2 Cf VDC 7 / 15 Synchronous Quasi-Z- Source Network Rated power: Full-Bridge Inverter Buck-boost hybrid control result in voltage regulation range: Optimized for Si PV modules and Hybrid transformer and resonant inductor Voltage doubler rectifier and filter for residential applications (shading) peak efficiency as a result of operation One was received

8 Efficiency, % Input current, A B A C Operating power, W Input voltage, V 0 8 / Input voltage, V

9 Relative distribution of wind speed, produced power and energy yield on different of the average wind: wind speeds Wind speed in Tallinn Airport on September 3, / 15

10 Generator voltage (V rms ) Generator power (W) 10 / 15 Wind Rotor PMSG Rated power: Wide input voltage range: Simple control Generator speed (rpm) a b c Diode Bridge Rectifier Isolated DC-DC Converters Variable DC-Link Low cost of realization + Voltage - 1 N Power design - redundancy Only Stable DC-Link Grid Side Inverter Grid Side Filter Wind speed (m/s) conversion stages Under development for further commercialization Grid

11 PMSG output power, W / 15 5A/div 100 V/div 68 Hz 4 ms/div Efficiency, % Rectifier Inverter DC-DC PCU Variable DC link voltage, V

12 highest power corresponds to the lowest voltage and highest current : > units are installed in Japan. sub-kw Class Solid Oxide Fuel Cell (SOFC) Cogeneration System for Household Use in 12 / 15

13 Development of power electronics technologies that low-cost near-zero energy residential and small commercial buildings. Building in a large scale Smart Grid. Grid Solar PV Panels ER Wind Turbines Fuel Cell H2 Battery Storage 13 / 15 Hydrogen buffer

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