Robust backstepping control of an interlink converter in a hybrid AC/DC microgrid based on feedback linearisation method

被引:16
作者
Dehkordi, N. Mahdian [1 ]
Sadati, N. [1 ]
Hamzeh, M. [2 ]
机构
[1] Sharif Univ Technol, Dept Elect Engn, Tehran, Iran
[2] Shahid Beheshti Univ, Dept Elect Engn, Tehran, Iran
关键词
Backstepping control; bidirectional interlink converter (BIC); dc-link voltage control; disturbance rejection; feedback linearisation control; plug-and-play; nonlinear model; CONTROL STRATEGY; NONLINEAR-SYSTEMS; VOLTAGE CONTROL; DC; DESIGN; AC; SCHEME;
D O I
10.1080/00207179.2016.1231425
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
This paper presents a robust dc-link voltage as well as a current control strategy for a bidirectional interlink converter (BIC) in a hybrid ac/dc microgrid. To enhance the dc-bus voltage control, conventional methods strive to measure and feedforward the load or source power in the dc-bus control scheme. However, the conventional feedforward-based approaches require remote measurement with communications. Moreover, conventional methods suffer from stability and performance issues, mainly due to the use of the small-signal-based control design method. To overcome these issues, in this paper, the power from DG units of the dc subgrid imposed on the BIC is considered an unmeasurable disturbance signal. In the proposed method, in contrast to existing methods, using the nonlinear model of BIC, a robust controller that does not need the remote measurement with communications effectively rejects the impact of the disturbance signal imposed on the BIC's dc-link voltage. To avoid communication links, the robust controller has a plug-and-play feature that makes it possible to add a DG/load to or remove it from the dc subgrid without distorting the hybrid microgrid stability. Finally, Monte Carlo simulations are conducted to confirm the effectiveness of the proposed control strategy in MATLAB/SimPowerSystems software environment.
引用
收藏
页码:1990 / 2004
页数:15
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