Double-Loop Control of Inverter with LCL Filter in Electrical Power System Based on Improved Instantaneous Symmetrical Component

Abstract:

An improved instantaneous symmetrical component method is adopted to improve the performance of inverter with LCL filter under asymmetric voltage conditions in electrical power system. Positive and negative sequence components in voltage and current in electrical power system are calculated with fewer calculation time,which is suitable for pratical application.In addition,this paper analyses active and reactive power in the system.A double-loop control strategy is proposed to eliminate the influence of double frequency components in power and negative sequence current.The simulation results verify its feasibility and effectiveness.

• Periodical: Advanced Materials Research (Volume 676)
• Pages: 265-268
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.676.265
• Online since: March 2013
• Authors: Yi Ren, Jian Ru Wan, Li Guang Shi, Ran Liu
• Keywords: Asymmetric Grid Voltage Conditions, Double-Loop Control Strategy, Improved Instantaneous Symmetrical Component, Inverter with LCL Filter

References

[1] YUAN Xufeng, CHENG Shijie,WEN Jinyu. An improved method of instantaneous symmetrical components and its detection for positive and negative sequence current[J]. Proceedings of the CSEE.Vol.28, No.1,Jan.2008.

[2] JI Tongjun, MA Qi. Analysis and Design of LCL Filter in Double-Fed Wind Power Converter [J]. Electrical & Electronics. No.2,2012.

[3] LI Jun, LI Yuling,Chen Guozhu. Astability Control Strategy for PWM Converter with Undamped LCL-Filter[J]. Transactions of China Electrotechical Society.Vol.27,No.4, Apr.2012.

[4] ZHU Longji, ZHANG Xuli. LCL Filter with Notch Correct of Grid-Connected Photo voltaic Inverters[J]. Transactions of China Electrotechical Society.Vol.27, No.4, Apr.2012.