Thesis Defense – Eihab E.E. Ahmed (MSEE)

Eihab E.E.  Ahmed – M.Sc. in Electrical and Electronics Engineering  

Asst. Prof. Göktürk Poyrazoğlu – Advisor

Date: 13.05.2024

Time: 14.00-15:30

Location: AB1 510

  AN EQUITABLE ACTIVE POWER CURTAILMENT METHOD FOR OVERVOLTAGE MITIGATION

 Asst. Prof. Göktürk Poyrazoğlu, Özyeğin University

Asst. Prof. Said Mirza Tercan, Yıldız Technical University

Asst. Prof. Dr. Ali Durusu, Yıldız Technical University

Abstract:

Distribution system operators pose various active power curtailment (APC) approaches to mitigate overvoltage. In contrast to general expectation, the overvoltage happens to be especially at the end of the distribution feeders in PV-rich networks. While APC helps keep the voltage within the stable operation limits, it causes renewable curtailment at each prosumer differently at increasing rates as the distance of the prosumer from the transformer increases. Hence, these approaches introduce unfairness among prosumers and fail to support the increased use of renewables locally. This study proposes an Equitable APC (EAPC) method based on the prosumer’s self-consumption rate (SCR). The method calculates each prosumer’s SCR during the overvoltage event, compares it with the precalculated critical SCR, and calculates a fair share of curtailment for each prosumer. Subsequently, leveraging the voltage sensitivity matrix, the new active power injection at the point of common coupling (PCC) is specified to ensure the overvoltage mitigation. To show the effectiveness of the proposed method, a comparison with three other methods, feed-in power limitation, inverter tripping, and dynamic APC, is presented under various PV penetration levels. The results show that EAPC significantly improves fairness among prosumers while providing comparable energy curtailment as dynamic APC. Furthermore, the proposed EAPC is less sensitive to the prosumer’s location and improves fairness among prosumers.  

Bio:

EIHAB E. E. AHMED received the B.Sc. from the Department of Electrical Engineering, Yildiz Technical University, Istanbul, Turkey, in 2022. He is currently pursuing his master’s program in the Department of Electrical and Electronics Engineering at Ozyegin University. Furthermore, he was a Teaching Assistant in Energy Systems courses and a Research Assistant in Grid Operations and Planning Laboratory at Ozyegin University during his graduate studies. His research interests include power system optimization, distributed renewable energy systems, electricity markets, electric vehicles, and energy storage systems. He published several papers related to his research areas.