voltage by flyback converter is converted to sinusoidal output current and voltage in phase with the grid. An EMI/EMC filter is used to suppress the EMI/EMC noise and provide impedance between inverter output and the grid. The auxiliary power for the controller and all feedback circuitry is derived from the PV panel voltage. For the convenient programming and design, a high performance, low cost digital signal controller will be necessary. A wide bandwidth processor is required for this application to better control voltage and current loops. It will also provide better noise immunity with less susceptibility to environmental changes. Finally, we will use the TI TMS320F28035 processor, which provides proper number of high resolution PWM outputs, 12-bit analog to digital converter inputs, and man-machine-interface required in this application. DSP will utilize A/D ports for input voltage, input current, dc voltage, output voltage, output current, and three additional auxiliary analog/ digital ports. This processor also provides peripheral circuits such as RS-232 and CAN as shown in Fig. 1. In addition, control algorithms with TI TMS320F28335 processor include controlling power flow from the PV panel to the grid, the MPPT algorithm, fault control, and optional digital communication routines. The DSP will have control algorithms for all parts of the design. For the DC-AC inverter grid connected and standalone modes, there will be algorithms for digital phase lock loop, current/voltage control, anti-islanding, and grid synchronization. Digital phase lock loop generates the grid voltage’s frequency and phase angle for the control to synchronize the output to the grid. Islanding is the continued operation of the inverter when the grid has been removed intentionally, by accident, or by damage. In the event of such an event, the anti-islanding protection will then stop supplying power to the grid. The DC-DC boost converter will also require algorithms for voltage boost controls and maximum power point tracking (MPPT). MPPT is required in order to optimize the power harvest from solar panels. The voltage control of the boost converter algorithm is needed in controlling the pulse width modulation (PWM) of the controller. Finally, there will we algorithms for protection and load balance. Project timeline Research Item Apr Schematics + Part List PCB Layout Prototype Design Parts Order PCB Order Board Assembly Hardware Board Testing Functions
voltage by flyback converter is converted to sinusoidal output current and voltage in phase with the grid. An EMI/EMC filter is used to suppress the EMI/EMC noise and provide impedance between inverter output and the grid. The auxiliary power for the controller and all feedback circuitry is derived from the PV panel voltage. For the convenient programming and design, a high performance, low cost digital signal controller will be necessary. A wide bandwidth processor is required for this application to better control voltage and current loops. It will also provide better noise immunity with less susceptibility to environmental changes. Finally, we will use the TI TMS320F28035 processor, which provides proper number of high resolution PWM outputs, 12-bit analog to digital converter inputs, and man-machine-interface required in this application. DSP will utilize A/D ports for input voltage, input current, dc voltage, output voltage, output current, and three additional auxiliary analog/ digital ports. This processor also provides peripheral circuits such as RS-232 and CAN as shown in Fig. 1. In addition, control algorithms with TI TMS320F28335 processor include controlling power flow from the PV panel to the grid, the MPPT algorithm, fault control, and optional digital communication routines. The DSP will have control algorithms for all parts of the design. For the DC-AC inverter grid connected and standalone modes, there will be algorithms for digital phase lock loop, current/voltage control, anti-islanding, and grid synchronization. Digital phase lock loop generates the grid voltage’s frequency and phase angle for the control to synchronize the output to the grid. Islanding is the continued operation of the inverter when the grid has been removed intentionally, by accident, or by damage. In the event of such an event, the anti-islanding protection will then stop supplying power to the grid. The DC-DC boost converter will also require algorithms for voltage boost controls and maximum power point tracking (MPPT). MPPT is required in order to optimize the power harvest from solar panels. The voltage control of the boost converter algorithm is needed in controlling the pulse width modulation (PWM) of the controller. Finally, there will we algorithms for protection and load balance. Project timeline Research Item Apr Prototype Design Schematics + Part List PCB Layout Parts Order PCB Order Board Assembly Board Testing Hardware Functions
SeniorDesign_Proposal.docx