A Compound Strategy to Optimize the Output Characteristics of Mid-Frequency Inverter

Abstract:

To improve the stability and output voltage quality of inverter, an new repetitive control strategy for 400Hz Constant Voltage Constant Frequency (CVCF) inverter has been proposed . Based on active damping, this strategy damps the oscillations on the output LC filter of inverter under unload or light load. Using state-observer to weaken the impact of time delay in digital control, a 5.5 kW one-phase 400Hz inverter prototype by this strategy has been tested.The result shows that low THD (about 1.5%) with inductive loads and fast error convergence (2 fundamental periods) can be achieved by this strategy which can be demonstrated to be brief and effective.

• Periodical: Applied Mechanics and Materials (Volumes 380-384)
• Pages: 2999-3002
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.380-384.2999
• Online since: August 2013
• Authors: Di Wu, Qi Jun Wu, Rong Zhao Zhu
• Keywords: 400Hz Inverter, Active Damping, Repetitive Control, State Observer

References

[1] Zhang Kai, Kang Yong, Xiong Jian, Zhang Hui, Chen Jian. Repetitive Waveform Correction Technique for CVCF SPWM Inverters[ A] . IEEE PESC Co nf. Rec. [C] , 2000: 153~ 158.

DOI: 10.1109/pesc.2000.878827

[2] Li Jian, Kang Yong, Chen Jian. A novel fuzzyrepetitive control scheme for inverters[C]. Proceedings of the 2002 IEEE International Symposium Intelligent Control, Vancouver, Canada, 2002: 104-109.

DOI: 10.1109/isic.2002.1157746

[3] Suxuan Guo, Dichen Liu. Analysis and Design of Output LC Filter System for Dynamic Voltage-Restorer[A]. USA2011, The International Conference on APEC [c]. 2011: 1599-1605.

DOI: 10.1109/apec.2011.5744808

[4] Hu Xing-liu. A New Design of Repetitive Controller applied in Inverter [J]. Power Electronics. 2008, 42(2): 12-13. 23.

[5] Xiong Jian, Shi Pengfei, Voltage Differential Feedback With Integral Control Plus Repetitive Control for PWM Inverters[J] Transactions ansactions of China electrotechnical society , 2007, 22(1): 85-90.

[6] Vladimir Blasko, Vikram Kaura. A Novel Control to Actively Damp Resonance in Input LC Filter of a Three-Phase Voltage Source Converter[J]. IEEE Transactions on Industry Applications, 1997, 33(2): 542-550.

DOI: 10.1109/28.568021

[7] Ding Xin-ping etc. An Improved Dir ect Repetitive Control Str ategy for CVCF Inverter. [J] Power Electronics, 2008, 42(4): 33-35.

[8] Wu Hao-Wei Duan Shan-Xu etc. Synthesized Control System of 400Hz Inver ter s based on Repetitive Control and PI Control [J]. Power Electronics, 2006, 40(4): 38-40.

[9] YANG Guo-quan, DUAN Shan-xu, FAN Ming-wu. Dual-loop Control System of Medium-fr equence Inver- ter s based on State-observer. [J]. Power Electronics, 2007, 41(3): 64-66.