Modelling and Simulation of an Adaptive Differential Current Protection Scheme for a Solar PV Microgrid

Microgrid Protection Challenges and Mitigation Approaches–A Comprehensive Review

“…Logic overcurrent and earth fault protection methods are presented in an article [171], to solve the protection problem related to false tripping. Differential protection based on differential relay [172], [173], [175]- [180], data mining, Fourier transform [176], Hilbert-Haung transform [181], [182], time-frequency transform [183], multi-agent scheme [177], and probabilistic method [184], is proposed to solve the microgrid protection issues related to faults/events during grid-connected and islanded operational modes of the microgrid, false tripping, unbalanced fault and high impedance fault. The ground relaybased distance protection scheme is implemented in an article [171], [185] to solve protection problems related to false tripping.…”

“…This paper summarises most of the microgrid protection challenges and listed solutions from current researches which can be a key resource for designing advanced protection schemes for all the challenges. -Faults/Events during grid-connected mode [149], [161], [169], [170], [172], [174] -Faults/Events during islanded mode [149], [161], [167], [169], [170], [172], [174] -Selection of PDs/switch [161] -Dynamics in fault current magnitude [149], [169], [170], [174] -Ati-Islanding Protection [170], [173] -False/sympathy tripping [165], [166], [171] -Unbalanced fault [172] -Loss of coordination [173] Merits: -Suitable for both islanded and grid-connected modes of the microgrid operations -Overcurrent relays pickup settings are changed according to operational mode Demerits: -Different relays settings are required for different operational conditions -Essential to modified relays settings with respect to operational modes -Essential to recognize different microgrid configurations -Increase computational burden for big size microgrid -Communication link is needed -High operational cost -Centralized controller is needed Differential protection: -Differential relay [172], [173], [175]- [180] -Data mining [176] -Fourier transform [176] -Hilbert-Huang transform [181], [182] -Time-frequency transform [183] -Multi-agent scheme [177] -Probabilistic method [184] -Differential relay…”

Application of Differential Protection Technique of Domestic Solar Photovoltaic Based Microgrid

“…When the power source is in the damaged part of the distributed generator, the main grid continues to supply the island. Therefore, the island allows benefits to customers to reduce power outages [3][4].…”