Parameters Design and Control Strategy of Cascade STATCOM Based on LCL Filter

Frequency controlling technique applied to the coal mine electromechanical equipments results in the absence of reactive power and harmonics pollution, which brings hidden troubles to power net in coal mine. Considering electromechanical equipment's safe and economic operation, this study opened with the mathematical model and parameters design of cascade STATCOM based on LCL filter. Then a low-pass filter time delay link and a PI controller were adopted for ensuring high dynamic response and low-frequency stable accuracy of the inner current loop. Eventually the repetitive control loop based on internal principal was used as outer current loop to realize zero static error tracking of referenced harmonic current, so that both high dynamic response and small steady-state error were obtained. Simulation and the actual device experiments validate the feasibility of the design.

[1]  Worawat Sa-ngiamvibool,et al.  Power Factor Improvement and Voltage Harmonics Reduction in Pulse Width Modulation AC Chopper Using Bee Colony Optimization , 2013 .

[2]  Ahmed Rhif,et al.  A Position Control Review for a Photovoltaic System:Dual Axis Sun Tracker , 2011 .

[3]  Mika Salo,et al.  A new control system with a control delay compensation for a current-source active power filter , 2005, IEEE Transactions on Industrial Electronics.

[4]  Fang Zheng Peng,et al.  Dynamic performance and control of a static VAr generator using cascade multilevel inverters , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[5]  Han-Eol Park,et al.  Comparative Study on the Position of Shunt Active Power Filters in 25 kV AC Railway Systems , 2012 .

[6]  Donald Grahame Holmes,et al.  Grid current regulation of a three-phase voltage source inverter with an LCL input filter , 2003 .

[7]  Sun Jianjun.  Design of the LPF Employed in the Link of the Shunt Active Power Filter and Power System , 2005 .

[8]  Yan Zhou,et al.  Design and research on parameter of LCL filter in three-phase grid-connected inverter , 2009, 2009 IEEE 6th International Power Electronics and Motion Control Conference.

[9]  V. Blasko,et al.  A novel control to actively damp resonance in input LC filter of a three phase voltage source converter , 1996, Proceedings of Applied Power Electronics Conference. APEC '96.

[10]  Fujio Ishiguro,et al.  Development of a large static VAr generator using self-commutated inverters for improving power system stability , 1991 .

[11]  Fang Zheng Peng,et al.  A multilevel voltage-source inverter with separate DC sources for static VAr generation , 1995, IAS '95. Conference Record of the 1995 IEEE Industry Applications Conference Thirtieth IAS Annual Meeting.