Improved active and reactive power sharing on distributed generator using auto-correction droop control

• Main Authors: Ismail, F., Jamaludin, J., Nasrudin, Abd Rahim
• Format: Article
• Published: Elsevier 2023
• Subjects: T Technology (General); TA Engineering (General). Civil engineering (General)
• Online Access: http://eprints.um.edu.my/38304/

This paper presents a power-sharing scheme for distributed generators (DG). It performs auto-correction droop control under grid disturbances or sudden changes in local load. The DG injects active power with zero reactive power into the standard grid in the grid-connected operation mode. However, when the grid disturbances involve voltage drops at the Point of Common Coupling (PCC), the DG should improve its ability to address the dis-turbances more effectively. Although the conventional P-Q-V droop control approach is capable to handle voltage drops and the sudden changes in the local load during grid-connected operations, it is unfortunately not able to share the active and reactive power proportionally. Hence, an improved P-Q-V droop control scheme is proposed in this work to address the shortcomings of the conventional P-Q-V droop control. The adaptive nominal voltage method uses auto-correction droop control to achieve proportionally-shared active and reactive power so that sudden changes in local load or grid voltage drops can be overcome accordingly. With the pro-posed method, the DG remains connected to the grid despite the grid voltage disturbances. The proposed model is further analyzed, and its effectiveness is confirmed through simulation. In addition, the experimental work validates the prototype functionality of the proposed controller.