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Protection philosophy for distribution grids with high penetration of distributed generation✰

2021; Elsevier BV; Volume: 196; Linguagem: Inglês

10.1016/j.epsr.2021.107203

1873-2046

S.P.S. Matos, Murillo Cobe Vargas, Luiz G. V. Fracalossi, Lucas Frizera Encarnação, Oureste Elias Batista,

HVDC Systems and Fault Protection

Distributed Generation (DG) can cause several problems in electrical systems that are not prepared to deal with these new sources: situations such as bidirectional power flow and large variations in short-circuit current values. This article presents changes in the actual distribution systems protection philosophy that intend to make the protection system always work properly and reliably eliminate any short-circuit. Furthermore, it shows that the actual philosophy is inefficient in systems with high DG penetration level and, through modifications in the actual philosophy, using available functions in the protection devices, it is possible to increase the reliability and assertiveness of the protection system for any fault.