Grid connected Solar PV battery system in MATLAB
The Blog delves into the integration of solar PV, battery systems, and the grid, emphasizing the control mechanisms implemented to manage power flow and maintain efficient operations.
Control Mechanisms for Solar PV
The solar PV system is governed by an incremental conductance algorithm to optimize power extraction. The system includes a battery, wherein the charging process is determined by the excess power from the PV system. If the PV generation exceeds the load demand, the surplus power charges the battery. Conversely, if the system load exceeds PV power, the battery discharges to meet the load requirements. The bidirectional DC-DC converter manages these interactions.
Voltage Control and Bi-Directional Converter
A critical component is the voltage controller, responsible for maintaining the bus voltage at 20 volts. This control logic influences the bidirectional DC-DC converter to manage the power flow, ensuring that the battery charges or discharges as per the power requirements of the PV system.
Inverter Control and DQ Frame Mechanism
The inverter's interaction with the grid is controlled using a DQ frame mechanism. This involves generating references for D and Q currents based on the actual current of the inverter. The DQ controller then converts these references into alpha-beta quantities, which further regulate the power supplied to the grid.
Current Reference Adjustment and System Response
The transcript demonstrates the adjustment of current references to depict the subsequent changes in the charging of the battery, grid current, and power sharing between the solar PV, battery, and the grid. Altering the reference values directly affects power sharing, emphasizing the system's responsiveness to control adjustments.
Dynamic System Behavior
By varying the current references, the system illustrates a dynamic response in terms of battery charging, grid current, and power sharing. Changes in the references directly impact the distribution of power among the solar PV, battery, and the grid, showcasing the system's adaptability to different load conditions.
Conclusion: Grid Integration with Solar PV and Battery
The transcript effectively presents the intricate control mechanisms regulating the solar PV, battery, and grid integration. It highlights the system's adaptability in managing power flow by adjusting current references, thereby illustrating the dynamic interplay between the components and their influence on power distribution and grid interactions.
This blog post condenses the detailed insights provided in the YouTube transcript, emphasizing the management of power flow among solar PV, battery systems, and the grid, showcasing the dynamic responses to control adjustments in the system.