Volume 14, Issue 4 (December 2018)                   IJEEE 2018, 14(4): 342-352 | Back to browse issues page

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Azghandi A, Barakati S M, Wu B. Dynamic Modeling and Control of Grid-Connected Photovoltaic Systems based on Amplitude-Phase Transformation. IJEEE 2018; 14 (4) :342-352
URL: http://ijeee.iust.ac.ir/article-1-1199-en.html
Dynamic Modeling and Control of Grid-Connected Photovoltaic Systems based on Amplitude-Phase Transformation
A. Azghandi , S. M. Barakati , B. Wu
Abstract:   (4500 Views)
A voltage source inverter (VSI) is widely used as an interface for distributed generation (DG) systems. However, high-power applications with increasing voltage levels require an extra power converter to reduce costs and complications. Thus, a current source inverter (CSI) is used. This study presents a precise phasor modeling and control details for a VSI-based system for DG and compares it with a CSI-based system. First, the dynamic characteristics of the system based on amplitude-phase transformation are investigated via small signal analysis in the synchronous reference frame. Moreover, the performance of the grid-connected system is determined by adopting the closed-loop control method based on the obtained dynamic model. The control strategies employ an outer active-power loop cascaded with an inner reactive-power loop, which the inner loop is a single-input single-output system without coupling terms. The sensitivity analysis of the linearized model indicates the dynamic features of the system. The simulation results for the different conditions confirm proposed model and design of the controller.
Keywords: Current Source Inverter (CSI) , Distributed Generation (DG) , Photovoltaic (PV) , Eigenvalue Analysis , Voltage-Source Inverter (VSI)
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Type of Study: Research Paper | Subject: Renewable Generation
Received: 2017/11/30 | Revised: 2018/12/01 | Accepted: 2018/03/18
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© 2022 by the authors. Licensee IUST, Tehran, Iran. This is an open access journal distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) license.