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Active Harmonic Compensation and Stability Improvement in High-Power Grid-Connected Inverters Using Unified Power Quality Conditioner | ||
International Journal of Industrial Electronics Control and Optimization | ||
مقاله 4، دوره 6، شماره 3، آذر 2023، صفحه 193-204 اصل مقاله (1.68 M) | ||
نوع مقاله: Research Articles | ||
شناسه دیجیتال (DOI): 10.22111/ieco.2023.45861.1487 | ||
نویسندگان | ||
Elham Samavati؛ Hamid Reza Mohammadi* | ||
University of Kashan | ||
چکیده | ||
Multifunctional features of grid-connected inverters can be used for harmonic compensation of local load voltage and grid-injected current. But, in high-power grid-connected inverters, there is a challenge due to low switching frequency. On the other hand, simultaneous compensation of local load voltage and grid-injected current harmonics is an important issue in grid-connected inverters. Using a Unified Power Quality Conditioner (UPQC) at the Point of Common Coupling (PPC), an improved active harmonic compensation method is proposed which is appropriate for high-power low-frequency grid-connected inverters. The UPQC operates as a combination of a negative shunt virtual admittance and a negative series virtual impedance at the PCC. It suppresses the disturbances caused by local load variation and grid impedance change. Using a low-power, high-frequency UPQC, local load voltage and grid-injected current harmonics up to higher-order components are simultaneously compensated despite grid impedance changes and nonlinear local load variations. The control system is designed according to the impedance-based stability criterion to ensure the system's stability. The theoretical results are validated using different case study simulations in MATLAB/Simulink software. | ||
کلیدواژهها | ||
United Power Quality Conditioner (UPQC)؛ Grid-Connected Inverter؛ Weak Grid؛ Impedance-Based Stability Criterion؛ Nonlinear Load | ||
مراجع | ||
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