Resolving the impact of distributed renewable generation on directional overcurrent relay coordination: a case study

Two approaches are proposed to solve the directional overcurrent relay coordination problem associated with the installation of distributed renewable generation (DRG) in interconnected power delivery systems (IPDS), depending on the existing system protection capability (adaptive or non-adaptive). For adaptive protection systems, the first proposed approach introduces a procedure to select the optimal minimum number of relays, their locations and new settings. This procedure is restricted by the available relay setting groups. For non-adaptive protection systems, the second proposed approach implements a practice to obtain optimal minimum fault current limiter values (FCL) to limit DRG fault currents and restore relay coordination status without altering the original relay settings. An integration of the proposed two approaches is evaluated for IPDSs possessing both protection systems. Three scenarios are assessed for different numbers of DRGs, and DRG and fault locations using an optimisation model implemented in GAMS software and a developed MatLab code. The obtained results are reported and discussed.

[1]  P. A. Kotos,et al.  IEEE standard inverse-time characteristic equations for overcurrent relays , 1999 .

[2]  J.R.S.S. Kumara,et al.  Over current protection coordination of distribution networks with fault current limiters , 2006, 2006 IEEE Power Engineering Society General Meeting.

[3]  A. J. Urdaneta,et al.  Optimal coordination of directional overcurrent relays in interconnected power systems , 1988 .

[4]  Sukumar Brahma,et al.  Development of adaptive protection scheme for distribution systems with high penetration of distributed generation , 2004 .

[5]  T.S. Sidhu,et al.  Restoration of Directional Overcurrent Relay Coordination in Distributed Generation Systems Utilizing Fault Current Limiter , 2008, IEEE Transactions on Power Delivery.

[6]  N. Hadjsaid,et al.  Dispersed generation impact on distribution networks , 1999 .

[7]  Paul M. Anderson.  Power System Protection , 1998 .

[8]  David Kendrick,et al.  GAMS, a user's guide , 1988, SGNM.

[9]  Sukumar Brahma,et al.  Microprocessor-based reclosing to coordinate fuse and recloser in a system with high penetration of distributed generation , 2002, 2002 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.02CH37309).

[10]  M. S. Sachdev,et al.  An on-line relay coordination algorithm for adaptive protection using linear programming technique , 1996 .

[11]  J.-L. Wu,et al.  The utility requirements for a distribution fault current limiter , 1992 .

[12]  P.P. Barker,et al.  Determining the impact of distributed generation on power systems. I. Radial distribution systems , 2000, 2000 Power Engineering Society Summer Meeting (Cat. No.00CH37134).

[13]  Abyaneh, H. Askarian,et al.  A New Optimal Approach for Coordination of Overcurrent Relays in Interconnected Power Systems , 2002, IEEE Power Engineering Review.