Novel controllers for the 48-pulse VSC STATCOM and SSSC for voltage regulation and reactive power compensation

The paper investigates the dynamic operation of novel control scheme for both Static Synchronous Compensator (STATCOM) and Static Synchronous Series Compensator (SSSC) based on a new full model comprising a 48-pulse Gate Turn-Off thyristor voltage source converter for combined reactive power compensation and voltage stabilization of the electric grid network. The complete digital simulation of the STATCOM and SSSC within the power system is performed in the MATLAB/Simulink environment using the Power System Blockset (PSB). The STATCOM scheme and the electric grid network are modeled by specific electric blocks from the power system blockset, while the control system is modeled using Simulink. Two novel controllers for the STATCOM and SSSC are presented in this paper based on a decoupled current control strategy. The performance of both STATCOM and SSSC schemes connected to the 230-kV grid are evaluated. The proposed novel control schemes for the STATCOM and SSSC are fully validated by digital simulation.

[1]  Xiao-Ping Zhang,et al.  Advanced modeling of the multicontrol functional static synchronous series compensator (SSSC) in Newton power flow , 2003 .

[2]  K. K. Sen.  SSSC-static synchronous series compensator: theory, modeling, and application , 1998 .

[3]  Laszlo Gyugyi,et al.  Understanding FACTS: Concepts and Technology of Flexible AC Transmission Systems , 1999 .

[4]  B. Singh,et al.  Analysis and design of STATCOM-based voltage regulator for self-excited induction generators , 2004, IEEE Transactions on Energy Conversion.

[5]  C.O. Nwankpa,et al.  A new type of STATCOM based on cascading voltage source inverters with phase-shifted unipolar SPWM , 1998, Conference Record of 1998 IEEE Industry Applications Conference. Thirty-Third IAS Annual Meeting (Cat. No.98CH36242).

[6]  Mauricio Aredes,et al.  Multi-pulse STATCOM operation under unbalanced voltages , 2002, 2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309).

[7]  G. Sybille,et al.  Modeling and simulation of a distribution STATCOM using Simulink's Power System Blockset , 2001, IECON'01. 27th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.37243).

[8]  Rajiv K. Varma,et al.  Thyristor-Based Facts Controllers for Electrical Transmission Systems , 2002 .

[9]  Wenhua Liu,et al.  Overview of STATCOM technologies , 2004, 2004 IEEE International Conference on Electric Utility Deregulation, Restructuring and Power Technologies. Proceedings.

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