Full Feedforward of Grid Voltage for Discrete State Feedback Controlled Grid-Connected Inverter With LCL Filter
Full Feedforward of Grid Voltage for Discrete State Feedback Controlled Grid-Connected Inverter With LCL Filter
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带LCL滤波器的离散状态反馈控制并网逆变器的电网电压全前馈
DOI：
10.1109/tpel.2012.2190524
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发表时间：
2012-03
影响因子：
6.7
通讯作者：
Liu, Fangrui
中科院分区：
文献类型：
--
作者：
Xue, Mingyu;Zhang, Yu;Kang, Yong;Yi, Yongxian;Li, Shuming;Liu, Fangrui
由于状态变量的多反馈特性，离散状态空间控制器为当前流行的lcl型并网逆变器提供了出色的控制带宽和控制稳定性，但电网电流仍然容易受到电网电压谐波的影响。连续控制器通常采用电网电压前馈来解决这一问题，但由于其过于复杂而不适用于离散状态空间控制器。通过连续变换，成功地提出了一种全电网电压前馈解耦策略，使离散状态空间控制器的前馈解耦成为可能。通过对离散化和连续化系统的传递函数分析和比较，对GVFF路径推导的有效性进行了全面验证。随后，对所提出的策略进行了网格阻抗鲁棒性分析。采用栅极电压估计器代替实测电压进行全梯度电压变换，既保留了栅极电压的重要信息，又消除了伴随噪声的影响。所提出的前馈控制器及其实现策略的显著特点是波形超稳定、动态响应和对网格阻抗变化的鲁棒性。算法的复杂度适中，计算量没有明显增加。最后给出了仿真和实验结果，验证了所提策略的可行性和有效性。
Due to multifeedback of state variables, a discrete state-space controller offers outstanding control bandwidth as well as control stability for popular LCL-type grid-connected inverters, while the grid current is still vulnerable to the grid-voltage harmonics. The feedforward of grid voltage, usually employed in continuous controllers to solve such a problem, is too complicated to be applied for the discrete state-space controller. By means of continuous transformation, a full grid-voltage feedforward (GVFF) decoupling strategy is successfully proposed in this paper to make the feedforward possible for the discrete state-space controller. Based on the transfer function analysis and comparison of discretized and continuous system, comprehensive verification is also provided to verify the effectiveness of the derivation of the GVFF path. Subsequently, the robustness analysis of the proposed strategy to the grid impedance is also performed. Moreover, a grid-voltage estimator instead of the measured voltage is employed for the full GVFF, which not only retains the important information of grid voltage but also eliminates the influence of accompanied noises. The distinct features of the proposed feedforward controller plus implementation strategy are the super steady waveform, dynamic response, and robustness to the variation of grid impedance. Besides, the complexity of the algorithm is moderate and the computational burden is not significantly increased. Finally, simulation and experimental results are provided to verify the feasibility and validity of the proposed strategy.
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影响因子：
6.7
作者：
T. Abeyasekera;C. M. Johnson;D. Atkinson;M. Armstrong
通讯作者：
T. Abeyasekera;C. M. Johnson;D. Atkinson;M. Armstrong
DOI：
10.1109/epe.2007.4417734
发表时间：
2007-09
期刊：
2007 European Conference on Power Electronics and Applications
影响因子：
--
作者：
W. Gullvik;Lars Norum;Roy Nilsen
通讯作者：
W. Gullvik;Lars Norum;Roy Nilsen
DOI：
10.1109/tpel.2008.924602
发表时间：
2008-07
期刊：
Twenty-First Annual IEEE Applied Power Electronics Conference and Exposition, 2006. APEC '06.
影响因子：
--
作者：
G. Shen;Dehong Xu;D. Xi;Xiaoming Yuan
通讯作者：
G. Shen;Dehong Xu;D. Xi;Xiaoming Yuan
DOI：
10.1109/tpel.2006.876840
发表时间：
2006-07
期刊：
2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551)
影响因子：
--
作者：
B. Bolsens;K. D. Brabandere;J. V. D. Keybus;Johan Driesen;R. Belmans
通讯作者：
B. Bolsens;K. D. Brabandere;J. V. D. Keybus;Johan Driesen;R. Belmans
DOI：
10.1109/tpel.2003.820540
发表时间：
2004-01
期刊：
Eighteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2003. APEC '03.
影响因子：
--
作者：
Marco Liserre;A. Dell'Aquila;F. Blaabjerg
通讯作者：
Marco Liserre;A. Dell'Aquila;F. Blaabjerg