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Vol. 8, No. 3, August 2023

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This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Designing a Smart Inverter for Voltage Sag Compensation Due to Motor Start-up

https://doi.org/10.22219/kinetik.v8i3.1744
Indra Budi Hermawan
Institut Teknologi Sepuluh Nopember
Ashari Mochamad
Institut Teknologi Sepuluh Nopember
Dedet Candra Riawan
Institut Teknologi Sepuluh Nopember

Corresponding Author(s) : Ashari Mochamad

ashari@ee.its.ac.id

Kinetik: Game Technology, Information System, Computer Network, Computing, Electronics, and Control, Vol. 8, No. 3, August 2023

Abstract

Starting a large induction motor will always follow up with an inrush current as the nature of an induction motor. On a less stiff power system, that inrush current will be causing a Voltage Sag (VS). A big VS can lead to significant disruptions in power quality and reliability. To address this, a Smart Inverter with an Artificial Intelligence (AI) -driven controller installed in a Photovoltaic (PV) farm is proposed for voltage sag recovery. During normal conditions, the PV farm acts as a power source supporting the main grid, but when large induction motors are started, the smart inverter connected to the PV is responsible for power conversion to recover sags caused by the Induction motor inrush current. The controller inside the Inverter ensures optimal operation. The use of AI also compares the effectiveness of using the Fuzzy Logic Controller (FLC) with the Proportional Integral (PI) Controller to assess their performance in reducing current spikes. Based on simulations, the FLC outperformed PI Controller in mitigating the voltage sag and avoiding the Low Voltage Ride-Through (LVRT). Simulation results show that voltage sag can be recovered for up to 97% of the nominal voltage, a significant improvement over the 80% sag recovery without the smart Inverter. At a nominal grid voltage of 6,600 volts, the VS Magnitude was successfully increased from 5,210 volts to 6,368 volts and the VS Duration also decreased from 6.96 s to 4.97 s. The results achieved validate the effectiveness of the approach in improving the power quality.

Keywords

Smart Inverter Artificial Intelligent Controler Inrush Current Induction Motor Voltage Sag Recovery Power Quality Improvement PV Farm ancillary function
Budi Hermawan, I., Mochamad, A., & Candra Riawan, D. (2023). Designing a Smart Inverter for Voltage Sag Compensation Due to Motor Start-up. Kinetik: Game Technology, Information System, Computer Network, Computing, Electronics, and Control, 8(3). https://doi.org/10.22219/kinetik.v8i3.1744
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Author Biographies

Ashari Mochamad, Institut Teknologi Sepuluh Nopember

Mochamad Ashari received the M.Eng. and Ph.D. degrees from Curtin University, Australia in 1997 and 2001, respectively. He is currently a Professor in the Department of Electrical Engineering and informatics Technology (Electics), Institut Teknologi Sepuluh Nopember Surabaya (ITS), Surabaya, Indonesia. His research interest are in power system operation, power electronics, artificial intelligence in power system, power system control, optimization of power systems, distributed generation, microgrid simulation power quality and renewable energy.

Dedet Candra Riawan, Institut Teknologi Sepuluh Nopember

Dedet Candra Riawan received the Bachelor’s Degree in Electrical Engineering from Sepuluh Nopember Institute of Technology (ITS), Indonesia, in 1999 and joined ITS as lecturer in 2000. In 2006, he receives the Master’s degree of Engineering from Curtin University of Technology, Australia. And receive the PhD in 2009 from the same university. His interest in research is in power electronics and its application in renewable energy

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