Development of an improved H-bridge cascaded static synchronous compensator in power system.

This paper presents a new configuration of H-bridge cascaded static synchronous compensator (STATCOM) based on auto disturbance rejection control and modulation wave shifting control intended for installation in industrial and utility power distribution systems. It proposes an improved controller that devotes itself not only to satisfying the requirement of dynamic reactive power compensation but also to achieving the balance of DC capacitor voltage. The new configuration is prominent in having no restriction on the number of power module. Simulation results show the proposed controller exhibits better performance in terms of response time and transient stability compared with the proportion integration controller. Two actual H-bridge cascaded STATCOMs are constructed at 10 kV, 2 MVA and 380 V, 6.5 kVA, respectively, and a series of verifications test are executed in 380 V, 6.5 kVA STATCOM experimental system. The experiment results further prove that H-bridge cascaded STATCOM with the proposed controller has excellent dynamic performance and strong robustness.

[1]  Mariesa L. Crow,et al.  STATCOM control for power system voltage control applications , 2000 .

[2]  H. F. Wang,et al.  Application of cell immune response modelling to power system voltage control by STATCOM , 2002 .

[3]  Nadarajah Mithulananthan,et al.  Comparison of PSS, SVC, and STATCOM controllers for damping power system oscillations , 2003 .

[4]  H. F. Wang,et al.  Interactions and multivariable design of STATCOM AC and DC voltage control , 2003 .

[5]  A.M. Sharaf,et al.  Two control schemes to enhance the dynamic performance of the STATCOM and SSSC , 2005, IEEE Transactions on Power Delivery.

[6]  A. Behal,et al.  Voltage regulation with STATCOMs: modeling, control and results , 2006, IEEE Transactions on Power Delivery.

[7]  H. Akagi,et al.  Control and Performance of a Transformerless Cascade PWM STATCOM With Star Configuration , 2007, IEEE Transactions on Industry Applications.

[8]  Luis Marroyo,et al.  Individual Voltage Balancing Strategy for PWM Cascaded H-Bridge Converter-Based STATCOM , 2008, IEEE Transactions on Industrial Electronics.

[9]  N. Yorino,et al.  Sensitivity Analysis to Operation Margin of Zone 3 Impedance Relays With Bus Power and Shunt Susceptance , 2008, IEEE Transactions on Power Delivery.

[10]  J. Roudet,et al.  A Modular Strategy for Control and Voltage Balancing of Cascaded H-Bridge Rectifiers , 2008, IEEE Transactions on Power Electronics.

[11]  Dong Chen,et al.  Fuzzy-PI-Based Direct-Output-Voltage Control Strategy for the STATCOM Used in Utility Distribution Systems , 2009, IEEE Transactions on Industrial Electronics.

[12]  Chien-Hung Liu,et al.  Design of a Self-Tuning PI Controller for a STATCOM Using Particle Swarm Optimization , 2010, IEEE Transactions on Industrial Electronics.

[13]  Bin Wu,et al.  Recent Advances and Industrial Applications of Multilevel Converters , 2010, IEEE Transactions on Industrial Electronics.

[14]  Payam Farhadi,et al.  STATCOM Controller Design Based on MLP for Power Flow Control , 2011 .

[15]  R. E. Betz,et al.  Optimization of Switching Losses and Capacitor Voltage Ripple Using Model Predictive Control of a Cascaded H-Bridge Multilevel StatCom , 2013, IEEE Transactions on Power Electronics.

[16]  Jinjun Liu,et al.  A Novel DC Voltage Control Method for STATCOM Based on Hybrid Multilevel H-Bridge Converter , 2013, IEEE Transactions on Power Electronics.