نویسندگان | Vahid Soori, Abolfazl Halvaei Niaser, Abbas Ketabi |
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نشریه | Journal of Solar Energy Research (JSER), University of Tehran |
ارائه به نام دانشگاه | دانشگاه کاشان |
شماره صفحات | 898-913 |
شماره سریال | 6 |
شماره مجلد | 4 |
نوع مقاله | Full Paper |
تاریخ انتشار | Autumn 2021 |
رتبه نشریه | علمی - پژوهشی |
نوع نشریه | چاپی |
کشور محل چاپ | ایران |
نمایه نشریه | ISC |
چکیده مقاله
Dynamic capacitor (DCAP) is a shunt power quality device that can simultaneously correct the power factor of the load and reduce the total harmonic distortion (THD) of the source current. In this paper, a novel control method was presented based on the model predictive control (MPC) to control a three-phase three-wire buck-type DCAP. In this method, the injected current of the DCAP was considered as the control variable, which must be controlled by two power electronic switches of the DCAP. The MPC controller minimized the absolute value of the difference between a reference current and a DCAP current in the prediction horizon. The reference current has consisted of two distinct parts, i.e., reactive power compensator (RPC), and harmonic current eliminator (HCE), dynamically based on the fundamental component of the load current. Also, a new prediction model (PM) was proposed to calculate the state variables of the DCAP based on their previous values, the state of the switches, and the prediction values of the grid voltage. The proposed PM was extracted from the linearized differential equations of the DCAP. Since, all the components of the DCAP, such as the capacitor and inductors in the inner and outer filters were modeled in these differential equations system, the proposed PM had excellent performance. The proposed method, unlike the PI controller, has fewer control parameters and can be implemented in extensive operational conditions. The simulation results in MATLAB software showed the superiority of the proposed method in comparison with the even harmonic modulation (EHM) method on a three-phase DCAP.
tags: Buck-Type Dynamic Capacitor (DCAP), Model Predictive Control (MPC), Reactive Power Compensator (RPC), Harmonic Current Eliminator (HCE).