Optimal Placement of SVC for Static and Dynamic Voltage Security Enhancement

This paper presents a sensitivity based approach to determine optimal location of Static VAR Compensator (SVC) for voltage security enhancement. The proposed approach of SVC placement computes sensitivity of system loading factor with respect to reactive power generation, derived from reactive power balance equation. This sensitivity factor has been termed as Bus Static Participation Factor (BSPF). The sensitivity of the most critical eigen value with respect to bus voltage magnitude has been considered as Bus Dynamic Participation Factor (BDPF). BSPF and BDPF have been combined to obtain Bus Hybrid Participation Factor (BHPF), which have been computed for the system intact case and critical contingency cases and used for selecting the optimal site for the SVC installation. The effectiveness of the proposed approach of SVC placement has been validated on a practical 75-bus Indian system with respect to enhancement of the static as well as dynamic voltage stability margins.

[1]  M. A. Pai,et al.  Hopf bifurcation control in power systems with static var compensators , 1997 .

[2]  Claudio A. Canizares,et al.  STATCOM Modeling for Voltage and Angle Stability Studies , 2003 .

[3]  H. Sasaki,et al.  A New Formulation for FACTS Allocation for Security Enhancement against Voltage Collapse , 2002, IEEE Power Engineering Review.

[4]  Hai Feng Wang,et al.  Coordinated secondary voltage control to eliminate voltage violations in power system contingencies , 2003 .

[5]  Claudio A. Canizares,et al.  Analysis of SVC and TCSC controllers in voltage collapse , 1999 .

[6]  N. K. Sharma,et al.  A Novel Placement Strategy for FACTS Controllers , 2002, IEEE Power Engineering Review.

[7]  Mariesa L. Crow,et al.  An Energy Based Approach to Undervoltage Load Shedding , 1995 .

[8]  S. Ahmed-Zaid,et al.  Structural modeling of small and large induction machines using integral manifolds , 1991 .

[9]  S. C. Srivastava,et al.  Corrective action planning to achieve a feasible optimal power flow solution , 1995 .

[10]  Peter W. Sauer,et al.  Power System Dynamics and Stability , 1997 .

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

[12]  W. F. Long,et al.  Determination of Needed FACTS Controllers That Increase Asset Utilization of Power Systems , 1997 .

[13]  K. R. Padiyar,et al.  Power system dynamics : stability and control , 1996 .

[14]  F. Alvarado,et al.  SVC placement using critical modes of voltage instability , 1993, Conference Proceedings Power Industry Computer Application Conference.

[15]  A. Monticelli,et al.  Security-Constrained Optimal Power Flow with Post-Contingency Corrective Rescheduling , 1987, IEEE Transactions on Power Systems.

[16]  Venkataramana Ajjarapu,et al.  The continuation power flow: a tool for steady state voltage stability analysis , 1991 .

[17]  P. Kundur,et al.  Power system stability and control , 1994 .

[18]  H.H. Happ,et al.  Large Scale Security Dispatching: an Exact Model , 1983, IEEE Transactions on Power Apparatus and Systems.

[19]  S. Granville.  Optimal reactive dispatch through interior point methods , 1994 .