Direct-Lyapunov-Based Control Scheme for Voltage Regulation in a Three-Phase Islanded Microgrid with Renewable Energy Sources

被引：5
作者：
Kordkheili, Hadi Hosseini [1 ]
Banejad, Mahdi [1 ]
Kalat, Ali Akbarzadeh [1 ]
Pouresmaeil, Edris [2 ]
Catalao, Joao P. S. [3 ,4 ,5 ]
机构：
[1] Shahrood Univ Technol, Fac Elect & Robot Engn, Shahrood 3619995161, Iran
[2] Aalto Univ, Dept Elect Engn & Automat, Espoo 02150, Finland
[3] Univ Porto, Fac Engn, INESC TEC, P-4200465 Porto, Portugal
[4] Univ Beira Interior, C MAST, P-6201001 Covilha, Portugal
[5] Univ Lisbon, Inst Super Tecn, INESC ID, P-1049001 Lisbon, Portugal
来源：
ENERGIES | 2018年 / 11卷 / 05期
基金：
欧盟第七框架计划;
关键词：
capability curves; direct Lyapunov stability theory; hierarchical control; inner control loops; microgrid; STABLE OPERATION; CONTROL STRATEGY; DISTRIBUTED GENERATION; HIERARCHICAL CONTROL; INVERTERS; UNITS; AC;
D O I：
10.3390/en11051161
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
In this paper, the local control structure of amicrogrid is partiallymodified by a Lyapunov-based controller. This controller is derived based on direct Lyapunov stability theory (DLST) in order to calculate proper switching functions for the stable operation of the local controller as well as proper local performance of each inverter-based distributed generation (DG) unit. The main contribution is the use of DLST-based controller in a hierarchical primary control structure along with a DC-side voltage regulator. A current-based droop controller is also introduced along with a voltage harmonic compensation technique. The control limits of droop equations are calculated based on steady-state and dynamic capability curve as well as voltage-frequency ellipse curve. The effect of the variations of voltages and circuit parameters on the capability curves are also investigated and the microgrid (MG) steady-state operation area is obtained. In the proposed method, the DC-voltage variations are regulated by an additional voltage control loop based on a current reference correction signal. The above-mentioned approaches are derived thoroughly with mathematical equations. The effectiveness of the designed controllers is verified by a MATLAB/SIMULINK simulation platform (Matlab/Simulink R2014a, Mathworks, Inc.) with harmonically distorted intermittent loads. The results show the appropriate performance of the proposed controllers during both steady-state and transient dynamic conditions.
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页数：18
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