Adaptive Voltage Based Relay Setting for PV Connected Distribution System

Inverter based distributed generations (IBDGs) have gained popularity in order to reduce carbon emission from fossil fuel based power plants. The contribution of very low fault currents due to low thermal overload capability and low voltage ride through (LVRT) techniques applied to control the voltage has resulted in different voltage profile than the fault condition with conventional synchronous machines. As a result, integration of these sources in distribution grid has caused maloperation of conventional over current relays (OCRs). In this paper, the adaptive setting of the OCR has been proposed using estimated voltage considering the operation of LVRT. The validation of the method proposed is been investigated on an IEEE distribution system comprising of 12 buses, using DIgSILENT Power Factory 2018 software and results obtained are significantly better. Both the time of operation of relays is improved and coordination is maintained.

[1]  Weixing Li,et al.  A comprehensive LVRT strategy of two-stage photovoltaic systems under balanced and unbalanced faults , 2018, International Journal of Electrical Power & Energy Systems.

[2]  Nikolaos G. Paterakis,et al.  Power system protection with digital overcurrent relays: A review of non-standard characteristics , 2018, Electric Power Systems Research.

[3]  Hazlee Azil Illias,et al.  Establishment of fault current characteristics for solar photovoltaic generator considering low voltage ride through and reactive current injection requirement , 2018, Renewable and Sustainable Energy Reviews.

[4]  Hatem Zeineldin,et al.  Optimal coordination of directional overcurrent relays using a new time-current-voltage characteristic , 2015, 2016 IEEE Power and Energy Society General Meeting (PESGM).

[5]  Manohar Singh,et al.  Protection coordination in distribution systems with and without distributed energy resources- a review , 2017, Protection and Control of Modern Power Systems.

[6]  A.A. Girgis,et al.  Development of adaptive protection scheme for distribution systems with high penetration of distributed generation , 2003, IEEE Transactions on Power Delivery.

[7]  Mahesh S. Illindala,et al.  The Influence of Inverter-Based DGs and Their Controllers on Distribution Network Protection , 2013, IEEE Transactions on Industry Applications.

[8]  Sadegh Jamali,et al.  Recloser time–current–voltage characteristic for fuse saving in distribution networks with DG , 2017 .

[9]  Sadegh Jamali,et al.  Self-Adaptive Relaying Scheme of Reclosers for Fuse Saving in Distribution Networks with DG , 2017 .

[10]  Mahesh S. Illindala,et al.  Comprehensive Protection Strategy for an Islanded Microgrid Using Intelligent Relays , 2015, IEEE Transactions on Industry Applications.

[11]  Sadegh Jamali,et al.  Non-communication protection method for meshed and radial distribution networks with synchronous-based DG , 2017 .

[12]  A. A. Kida,et al.  Optimal Coordination of Overcurrent Relays Using Mixed Integer Linear Programming , 2016, IEEE Latin America Transactions.

[13]  Arturo Conde Enríquez,et al.  Adaptive directional overcurrent relay coordination using ant colony optimisation , 2015 .

[14]  Hatem H. Zeineldin,et al.  Planning the Coordination of Directional Overcurrent Relays for Distribution Systems Considering DG , 2016, IEEE Transactions on Smart Grid.