Model Predictive Control-Based Energy Management System with Load Curtailment for Standalone Microgrid
DOI:
https://doi.org/10.31436/iiumej.v26i1.3230Keywords:
Model Predictive Controller (MPC), Energy Management System, Microgrid, Mixed Integer Quadratic Programming (MIQP), Load CurtailmentAbstract
The standalone microgrid emerges as an economical solution for providing electricity to remote areas disconnected from the main grid. However, the intermittent nature of renewable energy sources (RES) and unpredictable load demands can disrupt its balance. Diesel generators are commonly used to supply auxiliary power and serve as a backup for the microgrid. Nevertheless, inefficient utilization of diesel generators can lead to high operational costs, shortened lifespan, and environmental pollution. An energy management system (EMS) is implemented to optimize the operational cost and reliability of the microgrid by incorporating model predictive control (MPC), which has grown in popularity in recent years due to its ability to support multiple inputs and multiple outputs. The MPC-based EMS is developed using MATLAB/Simulink software, with the optimization problem formulated using mixed integer quadratic programming (MIQP). A comparative analysis is conducted between the MPC-based EMS with and without load curtailment capability, revealing a significant improvement of 52.21% in diesel fuel cost savings with the inclusion of load curtailment capability.
ABSTRAK: Grid mikro berdiri sendiri muncul sebagai penyelesaian ekonomi untuk menyediakan perkhidmatan elektrik kepada kawasan terpencil yang jauh daripada grid utama. Walau bagaimanapun, ciri-ciri ketidaktentuan sumber tenaga boleh diperbaharui (RES) dan permintaan beban yang tidak dapat diramalkan boleh mengganggu keseimbangan dalam grid mikro. Jentera diesel selalunya digunakan untuk menyediakan kuasa tambahan dan berfungsi sebagai sandaran untuk grid mikro. Namun begitu, penggunaan jentera diesel yang tidak cekap boleh menyebabkan kos operasi yang berlebihan, pengurangan jangka hayat dan pencemaran alam sekitar. Pengurusan tenaga (EMS) dilaksanakan untuk mengoptimumkan kos operasi grid mikro dan kebolehpercayaan dengan menggunakan kawal perkiraan model (MPC) yang semakin popular kerana keupayaannya dalam menyokong input dan output yang pelbagai. EMS berasaskan MPC dibangunkan menggunakan perisian MATLAB/Simulink, dengan masalah pengoptimuman diformulasikan menggunakan pengaturcaraan kuadratik berbilangan campuran (MIQP). Analisis perbandingan dijalankan antara EMS berasaskan MPC dengan dan tanpa keupayaan pemangkasan beban, yang mendedahkan pengurangan yang signifikan sebanyak 52.21% dalam penjimatan kos bahan api diesel dengan penambahan keupayaan pemangkasan beban.
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PETRONAS Research Sdn Bhd
Grant numbers SPP22-124-0124








