A New Weighted Average Current Control Strategy for System Reduction
Authors: 
Qiang Wu, Xinluo Li, Jiaxing Yu, Wang HanAuthors Info & Claims
Qiang Wu, Xinluo Li, Jiaxing Yu, Wang HanAuthors Info & ClaimsArticle No.: 106, Pages 1 - 8
Abstract
In the presence of a weak grid environment, stability margin of the current control of the LCL grid-tie inverter will be reduced, and stability margin gradually worsens with the increase of the inductive component in the grid impedance. In view of the above problems, this paper presents a control method, based on active damping control of grid voltage feed-forward. Through the zero-pole cancellation method, a new weighting coefficient is obtained, which reduces the order of system, improves the stability of the system, get better inverter output current quality. Finally, it is proved that the control method is available through Bode plot analysis and Matlab results.
References
[1]
Liserre M, Teodorescu R, Blaabjerg F. Stability of photovoltaic and wind turbine grid-connected inverters for a large set of grid impedance values[J]. IEEE Transactionson Power Electronics, 2006, 21(1): 263--272.
[2]
Yang Wei, Chen Yandong, Zhou Leming, et al. Influence and stability analysis of small-interference modeling of three-phase LCL grid-connected inverter under weak grid[J]. Proceedings of the CSEE, 2018, 38( 13): 3792--3804+4020.
[3]
Wu Heng, Yan Xinbo, Yang Dongsheng. Study on the influence of phase-locked loop on the stability of LCL grid-connected inverter under weak grid conditions and the design of phase-locked loop parameters [J]. Chinese Journal of Electrical Engineering, 2014, 34(30): 5259--5268.
[4]
Sun J. Impendance-based stability criterion for grid-connected Inverters[J]. IEEE Tran-sactions on Power Electronics, 2011, 26(11): 3075--3078
[5]
Mohamed Y. Suppression of low-and hign-frequency insta-bilities and grid-induced dis-turbances in distributed genera-tion inverters[J]. IEEE Transactions on Power Electronics, 2011, 16(12): 3790--3803.
[6]
Li Yuting, Dai Xunjiang. Analysis of the Influence of Weak Power Grid on Current Hysteresis Control of Photovoltaic Grid-Connected Inverter[J]. Low Voltage Apparatus, 2010, 20: 8--13.
[7]
Zhou Lin, Zhang Mi, Ju Xiuli, He Guoqing. Analysis of the Influence of Grid Impedance on the Stability of Large-scale Grid-connected Photovoltaic System[J]. Proceedings of the CSEE, 2013, 34: 34--41.
[8]
Xu Jinming, Xie Shaojun, Tang Ting. Adaptive Current Control of LCL Filtered Grid-Connected Inverter under Weak Power Grid[J]. Proceedings of the CSEE, 2014, 34(24): 4031--4039.
[9]
Yang Dongsheng, Yan Xinbo, Wu Heng. A virtual impedance method for improving the adaptability of LCL grid-connected inverters to weak grids[J]. Proceedings of the CSEE, 2014, 34(15): 2327--2335.
[10]
Xu Fei, Tang Yu, Gu Wei. Research on resonant feedforward control strategy of LCL grid-connected inverter under weak grid conditions[J]. Proceedings of the CSEE, 2016, 36(18): 4970--4979+5122.
[11]
Xu Jinming, Xie Shaojun, Tang Ting. Improved contro-l strategy with grid-voltage feedforward for LCL-filter-b-ased inverter connected to weak grid [J]. IET Power E-lectronics, 2014, 7(10): 2660--2671.
[12]
Timbus A, Liserre M, Teodorescu R, et al. Evaluation of current controllers for distributed power generation systems[J]. IEEE Transactions on Power Electronics, 2009, 4(3): 654--664.
Recommendations
Weighted average current method for active damping control based on grid voltage feed-forward
AbstractIn the weak current network environment, the existence of power network impedance will reduce the current control stability margin of LCL grid connected inverter, the stability margin will gradually deteriorate as the inductive component of the ...
A new pipelined analog-to-digital converter using current conveyors
A new pipelined analog-to-digital converter (ADC) using second-generation current conveyor (CCII) is presented. Two main building blocks of the pipelined ADC, sample-and-hold ( S/H ) circuit and multiplying digital-to-analog converter (MDAC) are ...
The Resonance Suppression for Parallel Photovoltaic Grid-connected Inverters in Weak Grid
Obvious resonance peak will be generated when parallel photovoltaic grid-connected inverters are connected to the weak grid with high grid impedance, which seriously affects the stability of grid-connected operation of the photovoltaic system. To ...
Comments
Information & Contributors
Information
Published In
December 2019
870 pages
ISBN:9781450372930
DOI:10.1145/3386415
Copyright © 2019 ACM.
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]
Publisher
Association for Computing Machinery
New York, NY, United States
Publication History
Published: 30 May 2020
Check for updates
Author Tags
Qualifiers
- Research-article
- Research
- Refereed limited
Funding Sources
- National Natural Science Foundation of China
Conference
ICITEE-2019
ICITEE-2019: 2nd International Conference on Information Technologies and Electrical Engineering
December 6 - 7, 2019
Hunan, Zhuzhou, China
Contributors
Other Metrics
Bibliometrics & Citations
Bibliometrics
Article Metrics
- 0Total Citations
- 21Total Downloads
- Downloads (Last 12 months)3
- Downloads (Last 6 weeks)0
Reflects downloads up to 30 Jan 2025
Other Metrics
Citations
View Options
Login options
Check if you have access through your login credentials or your institution to get full access on this article.
Sign in