A 6.6-kV transformerless STATCOM based on a five-level diode-clamped PWM converter: system design and experimentation of a 200-V, 10-kVA laboratory model

This paper discusses the potential of a transformerless STATic synchronous COMpensator (STATCOM) intended for installation on the 6.6-kV industrial and utility distribution systems. The STATCOM consists of a five-level diode-clamped pulsewidth-modulation converter rated at 1 MVA and a voltage-balancing circuit rated at 6 kVA. Moreover, this paper designs, constructs, and tests a 200-V 10-kVA STATCOM based on a five-level converter with a carrier frequency of 3 kHz and a voltage-balancing circuit with a switching frequency of 3 kHz. The STATCOM and its experimental waveforms verify the viability and effectiveness of the 6.6-kV transformerless STATCOM.

[1]  Boon-Teck Ooi,et al.  Regulating and equalizing DC capacitance voltages in multilevel STATCOM , 1997 .

[2]  Mario Marchesoni,et al.  Diode-clamped multilevel converters: a practicable way to balance DC-link voltages , 2002, IEEE Trans. Ind. Electron..

[3]  Thomas A. Lipo,et al.  A four level inverter based drive with a passive front end , 1997 .

[4]  K. Matsuse,et al.  Voltage balancing method for IGBTs connected in series , 2002 .

[5]  Fang Zheng Peng,et al.  Multilevel inverters: a survey of topologies, controls, and applications , 2002, IEEE Trans. Ind. Electron..

[6]  N. S. Choi,et al.  A general circuit topology of multilevel inverter , 1991, PESC '91 Record 22nd Annual IEEE Power Electronics Specialists Conference.

[7]  Hirofumi Akagi,et al.  Instantaneous Reactive Power Compensators Comprising Switching Devices without Energy Storage Components , 1984, IEEE Transactions on Industry Applications.

[8]  Tokuo Ohnishi,et al.  PWM control method for a four-level inverter , 1995 .

[9]  H. Akagi,et al.  Analysis of variation of neutral point potential in neutral-point-clamped voltage source PWM inverters , 1993, Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting.

[10]  Peter K. Steimer,et al.  Five level GTO inverters for large induction motor drives , 1993, Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting.

[11]  Fang Zheng Peng,et al.  Multilevel converters-a new breed of power converters , 1995, IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting.

[12]  Hirofumi Akagi,et al.  Analysis and design of a DC voltage-controlled static VAr compensator using quad-series voltage-source inverters , 1996 .

[13]  R. H. Lasseter,et al.  A transformer-less static synchronous compensator employing a multi-level inverter , 1997 .

[14]  Dushan Boroyevich,et al.  Voltage-balance limits in four-level diode-clamped converters with passive front ends , 2005, IEEE Transactions on Industrial Electronics.

[15]  Mark Sumner,et al.  Novel technique for maintaining balanced internal DC link voltages in diode clamped five-level inverters , 1999 .

[16]  Hirofumi Akagi,et al.  A New Neutral-Point-Clamped PWM Inverter , 1981, IEEE Transactions on Industry Applications.