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1. Experimental Validation of a Three-Port Integrated Topology to Interface Electric Vehicles and Renewables with the Electrical Grid Course No: EE 4130 Course Title: Technical Seminar Authors Name Vítor Monteiro J. G. Pinto João Luiz Presented By Md. Tanzid Mia Roll: 1703063 Dept. of EEE KUET Source In Published in: IEEE Transaction on Industrial Informatics Impact Factor: 10.215 DOI: 10.1109/TII.2018.2818174, Date of Publication: 22 March 2018. Khulna University Of Engineering & Technology 1

2. Introduction Circuit diagram of the proposed TPIT System TPIT control Algorithm TPIT Principle of operation Result and Discussion Conclusion O U T L I N E 2

3. INTRODUCTION Why interface needed between EV and Renewables with Electrical Grid? -Need for EV is increasing Exponentially -As EV’s are power by grid hence increase in demand of grid -Fossil fuels likely to decrease significantly in future Renewable Energy Sources can be the primary weapon!!!! 3 Motivation

4. INTRODUCTION EV & PV interface with Grid: Classical Topology (a)   4

5. INTRODUCTION EV & PV interface with Grid: Proposed Topology (b) 5

6. INTRODUCTION Modes of Operation G2V V2G R2G R2V Fig. 1 : Proposed three-port integrated topology (TPIT) used to interface electric vehicles (EVs) and renewables from photovoltaics (PV) with the electrical grid through the G2V, V2G, R2V and R2G operation modes 6

7. Circuit Diagram Of The Proposed TPIT System Fig. 2 : Circuit of the proposed three-port integrated topology (TPIT) used to interface EVs and renewables with the electrical grid 7 Grid Section EV Section PV Section

8. TPIT Control Algorithm Fig. 3 : Flowchart of the proposed TPIT control algorithm The voltages and currents will be collected After every 25 Micro Seconds using an external ADC After then, the operation mode is determined based on the energy generated by the PV and the EV operation 8

9. TPIT Principle of Operation Fig. 4: Principle of operation of the proposed three-port integrated topology (TPIT) used to interface EVs and renewables with the electrical grid: Grid voltage (vg); Grid Current (i g ); Grid power (P g ); EV power ( P ev ); PV power ( P pv ). 9

10. Result & Discussions: Fig. 5: Experimental results during the G2V operation mode: Grid voltage (v g : 100 V/div) and grid current (i g : 10 A/div) Fig. 5 shows the electrical grid voltage (v g ) and the grid current (i g ) during the G2V operation mode for an operating power of 3 kW 10

11. I g is in phase opposition with the electrical grid voltage (v g ), meaning that the TPIT is injecting energy into the power grid (i.e., it is operating as a grid-tie inverter). Fig. 6 shows the electrical grid voltage (v g ) and the grid current (i g ) during the V2G operation mode for an operating power of 1.6 kW Fig. 6 also shows a detail of the grid current ripple illustrating the frequency of 40 kHz (resultant from the unipolar PWM strategy with a 20 kHz carrier) and the amplitude of the grid current ripple (0.5 A) in this point of the waveform. Fig. 6: Experimental results during the V2G operation mode: Grid voltage (v g : 100 V/div) and grid current (i g : 10 A/div) Result & Discussions: 11

12. Result & Discussions: Fig. 7 : Experimental results of the grid current THD in function of the operation power: (a) During the G2V operation mode; (b) During the V2G operation mode 12

13. Result & Discussions: Fig. 8 : Experimental results during the G2V and V2G operation modes: Grid power ( p g : 1 kW/div); EV power ( p ev : 1 kW/div); PV power ( p pv : 1 kW/div) Fig. 9 : Experimental results during the R2G operation mode: Grid power ( p g : 1 kW/div); EV power ( p ev : 1 kW/div); PV power ( p pv : 1 kW/div) 13

14. Result & Discussions: Fig. 11 : Experimental results during the G2V, V2G, R2G and R2V operation modes: Grid power ( p g : 1 kW/div); EV power ( p ev : 1 kW/div); PV power ( p pv : 1 kW/div). Fig. 10: Experimental results during R2V operation modes: Grid power ( p g : 1 kW/div); EV power ( p ev : 1 kW/div); PV power ( p pv : 1 kW/div). 14

15. Conclusion The proposed TPIT has been experimentally validated in four basic operation modes Allows for reduction of conversion stages P ermitting the design of novel operation modes and control algorithms without sacrificing power quality on the electrical grid side THD is in acceptable limit 15