A control method for voltage source inverter without dc link capacitor

Voltage source inverter plays an important role in modern industry. Conventional voltage source inverter has a large electrolytic capacitor as energy store element in order to keep the dc link voltage constant. However, a large electrolytic capacitor increases the input current distortion. Replacing the large electrolytic capacitor by a small film capacitor the input current quality is improved but the output currents are distorted by low order harmonics. This paper proposes a simple current control method for a voltage source inverter without the use of a large electrolytic capacitor in the dc link in order to compensate the low order harmonics in the output currents. The proposed current control scheme employs just one PI regulator and since that the space vector modulation is used in this control the switching frequency of the converter is kept constant.

[1]  P. Bowler,et al.  Static Power Frequency Changers , 1977 .

[2]  E.R. Filho,et al.  A Simple Current Control for Matrix Converter , 2006, Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting.

[3]  Muhammad H. Rashid,et al.  New current control scheme for PWM inverters , 1988 .

[4]  Jong-Woo Chui,et al.  New current control concept-minimum time current control in the three-phase PWM converter , 1997 .

[5]  P. Enjeti,et al.  A new technique to reject DC-link voltage ripple for inverters operating on programmed PWM waveforms , 1990, 21st Annual IEEE Conference on Power Electronics Specialists.

[6]  O. Pyrhonen,et al.  Overmodulation in Voltage Source Inverter with Small DC-link Capacitor , 2005, 2005 IEEE 36th Power Electronics Specialists Conference.

[7]  A. von Jouanne,et al.  Assessment of ride-through alternatives for adjustable speed drives , 1998, Conference Record of 1998 IEEE Industry Applications Conference. Thirty-Third IAS Annual Meeting (Cat. No.98CH36242).

[8]  João Carlos Basilio,et al.  Design of PI and PID controllers with transient performance specification , 2002, IEEE Trans. Educ..

[9]  M. Kazerani,et al.  Space Vector Modulation Control of an AC–DC–AC Converter With a Front-End Diode Rectifier and Reduced DC-link Capacitor , 2006, IEEE Transactions on Power Electronics.

[10]  E.R. Filho,et al.  A Simple Current Control for Matrix Converter , 2006, 2006 IEEE International Symposium on Industrial Electronics.

[11]  L. Malesani,et al.  PWM current control techniques of voltage source converters-a survey , 1993, Proceedings of IECON '93 - 19th Annual Conference of IEEE Industrial Electronics.

[12]  Paolo Tenti,et al.  AC/DC/AC PWM converter with reduced energy storage in the DC link , 1995 .

[13]  F. Blaabjerg,et al.  Space vector modulated matrix converter with minimized number of switchings and a feedforward compensation of input voltage unbalance , 1996, Proceedings of International Conference on Power Electronics, Drives and Energy Systems for Industrial Growth.