Online Adaptive Protection Scheme for Electrical Distribution Network with high penetration of renewable energy sources

  • Dabasree Saha Department of Electrical Engineering, National Institute of Technology- Agartala, Tripura, India http://orcid.org/0000-0002-2540-2431
  • B. K. SAHA ROY Department of Electrical Engineering, National Institute of Technology- Agartala, Tripura, India
  • P. N. Das Department of Electrical Engineering, National Institute of Technology- Agartala, Tripura, India

Abstract

Incorporation of distributed energy resources (DERs) in power distribution networks makes the system combined and lively. Presence of DER with variable generating capacity at different locations converts protection coordination problem (PCP) to a very challenging one. In this paper authors have proposed an online adaptive protection scheme based on relay coordination to tackle PCP, when renewable energy based distributed generators penetrate power in the system with conventional generators. Directional overcurrent relays (DORs) are one of the main elements of protection schemes in power systems. The PCP is formulated as nonlinear programming problem with DORs for different operating combinations. The adaptive algorithm uses an afresh published optimization technique namely, Symbiotic Organism Search (SOS) installed at SCADA computers. The program is coded in MATLAB to find the optimal settings of relay parameters, time dial setting (TDS) and pickup current (Ip) setting, which gives minimum operating time during any fault. Operational ability of the algorithm is validated on IEEE 14 bus distribution system by varying generation arrangements of DER in different combinations. Every time for slight variation in the system fault current level, may be due to variation in line parameters or incorporation of new DERs, new relay settings are communicated to corresponding relays. The proposed protection scheme is highly flexible to sustain the protection coordination among DORs, maintaining reliable coordination margin for each primary/backup relay pair for every combination.

Author Biographies

Dabasree Saha, Department of Electrical Engineering, National Institute of Technology- Agartala, Tripura, India
Department of Electrical Engineering,
B. K. SAHA ROY, Department of Electrical Engineering, National Institute of Technology- Agartala, Tripura, India
Department of Electrical Engineering,
P. N. Das, Department of Electrical Engineering, National Institute of Technology- Agartala, Tripura, India
Department of Electrical Engineering,

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http://www.ee.washington.edu/research/pstca/

Published
2019-06-02
Issue
Vol 7 No 2 (2019)
Section
Electrical Engineering