Single-Sensor Control of LCL-Filtered Grid-Connected Inverters
被引:32
作者:
Su, Mei
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机构:
Cent South Univ, Sch Automat, Changsha 410083, Hunan, Peoples R China
Hunan Prov Key Lab Power Elect Equipment & Grid, Changsha 410083, Hunan, Peoples R ChinaCent South Univ, Sch Automat, Changsha 410083, Hunan, Peoples R China
Su, Mei
[1
,2
]
Cheng, Bin
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机构:
Cent South Univ, Sch Automat, Changsha 410083, Hunan, Peoples R China
Hunan Prov Key Lab Power Elect Equipment & Grid, Changsha 410083, Hunan, Peoples R ChinaCent South Univ, Sch Automat, Changsha 410083, Hunan, Peoples R China
Cheng, Bin
[1
,2
]
Sun, Yao
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机构:
Cent South Univ, Sch Automat, Changsha 410083, Hunan, Peoples R China
Hunan Prov Key Lab Power Elect Equipment & Grid, Changsha 410083, Hunan, Peoples R ChinaCent South Univ, Sch Automat, Changsha 410083, Hunan, Peoples R China
Sun, Yao
[1
,2
]
Tang, Zhongting
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机构:
Cent South Univ, Sch Automat, Changsha 410083, Hunan, Peoples R China
Hunan Prov Key Lab Power Elect Equipment & Grid, Changsha 410083, Hunan, Peoples R ChinaCent South Univ, Sch Automat, Changsha 410083, Hunan, Peoples R China
Tang, Zhongting
[1
,2
]
Guo, Bin
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机构:
Cent South Univ, Sch Automat, Changsha 410083, Hunan, Peoples R China
Hunan Prov Key Lab Power Elect Equipment & Grid, Changsha 410083, Hunan, Peoples R ChinaCent South Univ, Sch Automat, Changsha 410083, Hunan, Peoples R China
Guo, Bin
[1
,2
]
Yang, Yongheng
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机构:
Aalborg Univ, Dept Energy Technol, DK-9220 Aalborg, DenmarkCent South Univ, Sch Automat, Changsha 410083, Hunan, Peoples R China
Yang, Yongheng
[3
]
Blaabjerg, Frede
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机构:
Aalborg Univ, Dept Energy Technol, DK-9220 Aalborg, DenmarkCent South Univ, Sch Automat, Changsha 410083, Hunan, Peoples R China
Blaabjerg, Frede
[3
]
Wang, Hui
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机构:
Cent South Univ, Sch Automat, Changsha 410083, Hunan, Peoples R China
Hunan Prov Key Lab Power Elect Equipment & Grid, Changsha 410083, Hunan, Peoples R ChinaCent South Univ, Sch Automat, Changsha 410083, Hunan, Peoples R China
Wang, Hui
[1
,2
]
机构:
[1] Cent South Univ, Sch Automat, Changsha 410083, Hunan, Peoples R China
[2] Hunan Prov Key Lab Power Elect Equipment & Grid, Changsha 410083, Hunan, Peoples R China
[3] Aalborg Univ, Dept Energy Technol, DK-9220 Aalborg, Denmark
Active damping;
linear quadratic regulator;
multi-resonant controller;
reduced-order observer;
state-space control;
MODEL-PREDICTIVE CONTROL;
SPACE CURRENT CONTROL;
PWM CONVERTERS;
RESONANCE;
DESIGN;
D O I:
10.1109/ACCESS.2019.2906239
中图分类号:
TP [自动化技术、计算机技术];
学科分类号:
0812 ;
摘要:
Owing to the filter resonance and background harmonics, the current control for the LCL-filtered grid-connected inverter should be carefully designed to ensure stable operation. Prior-art current control methods normally require extra sensors to achieve the damping of the resonance, or sophisticated active damping should be employed. Both increase the overall system cost and complexity. In this context, an improved control strategy is proposed for LCL-filtered inverters. The proposed control method utilizes a novel reduced-order observer in a way that only one current sensor is required for stable operation (i.e., resonance and harmonics are effectively attenuated). More specifically, the reduced-order observer embeds the dynamics of the grid voltage, where the estimated grid information is used for synchronization in a phase-locked loop. The estimated state variables of the observer are then used for the controller design. Furthermore, to achieve active damping and suppress the influence of grid voltage distortions on the current quality, a multi-resonant state-space controller is proposed, where a linear quadratic regulator method is employed to obtain the optimal gain. The simulations and experimental tests are performed on a 3-kW grid-connected inverter system with an LCL filter. The results demonstrate the effectiveness of the proposed method in terms of robust active damping and strong harmonic attenuation, and thus the inverter achieves a good power quality with only one current sensor.
机构:
Xi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Sch Elect Engn, Xian 710049, Shaanxi, Peoples R ChinaXi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Sch Elect Engn, Xian 710049, Shaanxi, Peoples R China
Bao, Xianwen
Zhuo, Fang
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机构:
Xi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Sch Elect Engn, Xian 710049, Shaanxi, Peoples R ChinaXi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Sch Elect Engn, Xian 710049, Shaanxi, Peoples R China
Zhuo, Fang
Tian, Yuan
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机构:
Delta Elect Co Ltd, Shanghai 201209, Peoples R ChinaXi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Sch Elect Engn, Xian 710049, Shaanxi, Peoples R China
Tian, Yuan
Tan, Peixuan
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机构:
Xi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Sch Elect Engn, Xian 710049, Shaanxi, Peoples R ChinaXi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Sch Elect Engn, Xian 710049, Shaanxi, Peoples R China
机构:
Xi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Sch Elect Engn, Xian 710049, Shaanxi, Peoples R ChinaXi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Sch Elect Engn, Xian 710049, Shaanxi, Peoples R China
Bao, Xianwen
Zhuo, Fang
论文数: 0引用数: 0
h-index: 0
机构:
Xi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Sch Elect Engn, Xian 710049, Shaanxi, Peoples R ChinaXi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Sch Elect Engn, Xian 710049, Shaanxi, Peoples R China
Zhuo, Fang
Tian, Yuan
论文数: 0引用数: 0
h-index: 0
机构:
Delta Elect Co Ltd, Shanghai 201209, Peoples R ChinaXi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Sch Elect Engn, Xian 710049, Shaanxi, Peoples R China
Tian, Yuan
Tan, Peixuan
论文数: 0引用数: 0
h-index: 0
机构:
Xi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Sch Elect Engn, Xian 710049, Shaanxi, Peoples R ChinaXi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Sch Elect Engn, Xian 710049, Shaanxi, Peoples R China