Stability Enhancement for Parallel Grid-Connected Inverters by Improved Notch Filter

被引:20
作者
Yang, Ling [1 ]
Chen, Yandong [1 ]
Luo, An [1 ]
Huai, Kunshan [2 ]
机构
[1] Hunan Univ, Coll Elect & Informat Engn, Changsha 410082, Hunan, Peoples R China
[2] Guangzhou Power Supply Co Ltd, Guangzhou 510620, Guangdong, Peoples R China
来源
IEEE ACCESS | 2019年 / 7卷
基金
国家重点研发计划;
关键词
Weak grid; parallel inverters; improved notch filter; impedance reshaping; stability enhancement; BATTERY STORAGE; POWER; DESIGN; SYSTEM; LOOP;
D O I
10.1109/ACCESS.2019.2917533
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
As parallel inverters connected to the weak grid, the interactions between the inverters and the grid are the potential threat to the system stability. The traditional grid-side inductance current feedback control method with notch filter can suppress the high-frequency oscillation. However, it will lead to stability reduction and even instability. Therefore, a stability enhancement method by the improved notch filter is proposed for parallel grid-connected inverters. This method can effectively restrain parallel inverters' harmonic current into the grid, and accordingly avoid the high-frequency oscillation of impedance network. Furthermore, it improves the phase margin of the system, and thus ensures the sufficient stability of the system in the weak grid. Considering the notch depth and dynamic performance of improved notch filter, the appropriate control parameters are selected. Finally, experimental results verify the validity of the proposed control method.
引用
收藏
页码:65667 / 65678
页数:12
相关论文
共 22 条
[1]   Appropriate Grounding System for Grid-Connected Small-Scale Synchronous Generators [J].
Abedini, Moein ;
Davarpanah, Mahdi ;
Sanaye-Pasand, Majid .
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, 2015, 51 (06) :5390-5397
[2]   Dynamic performance analysis, stability margin improvement and transfer power capability enhancement in DFIG based wind turbines at weak ac grid conditions [J].
Azizi, Amir Hosein ;
Rahimi, Mohsen .
INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS, 2018, 99 :434-446
[3]   Modeling and Control of a Master-Slave PV Inverter With N-Paralleled Inverters and Three-Phase Three-Limb Inductors [J].
Borrega, Mikel ;
Marroyo, Luis ;
Gonzalez, Roberto ;
Balda, Julian ;
Luis Agorreta, Juan .
IEEE TRANSACTIONS ON POWER ELECTRONICS, 2013, 28 (06) :2842-2855
[4]   Study on Ideal Operation Status of Parallel Inverters [J].
Cai, Hui ;
Zhao, Rongxiang ;
Yang, Huan .
IEEE TRANSACTIONS ON POWER ELECTRONICS, 2008, 23 (06) :2964-2969
[5]   Harmonic interaction between a large number of distributed power inverters and the distribution network [J].
Enslin, JHR ;
Heskes, PJM .
IEEE TRANSACTIONS ON POWER ELECTRONICS, 2004, 19 (06) :1586-1593
[6]   Advanced Control of Grid-Connected Current Source Converter Under Unbalanced Grid Voltage Conditions [J].
Guo, Xiaoqiang ;
Yang, Yong ;
Zhang, Xue .
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, 2018, 65 (12) :9225-9233
[7]   ESI: A Novel Three-Phase Inverter With Leakage Current Attenuation for Transformerless PV Systems [J].
Guo, Xiaoqiang ;
Yang, Yong ;
Zhu, Tieying .
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, 2018, 65 (04) :2967-2974
[8]   Whale optimisation algorithm for automatic generation control of interconnected modern power systems including renewable energy sources [J].
Hasanien, Hany M. .
IET GENERATION TRANSMISSION & DISTRIBUTION, 2018, 12 (03) :607-614
[9]   Investigation and Active Damping of Multiple Resonances in a Parallel-Inverter-Based Microgrid [J].
He, Jinwei ;
Li, Yun Wei ;
Bosnjak, Dubravko ;
Harris, Brent .
IEEE TRANSACTIONS ON POWER ELECTRONICS, 2013, 28 (01) :234-246
[10]   THE ANALYSIS AND COMPENSATION OF DEAD-TIME EFFECTS IN PWM INVERTERS [J].
JEONG, SG ;
PARK, MH .
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, 1991, 38 (02) :108-114