Overcurrent relay coordination with grid-connected and islanding capability on distribution network with distributed generation

Conference on Innovation in Technology and Engineering Science

工业技术（总论）

Adrianti^1 ; Wahyuni, S.^1 ; Nasir, M.^1

Electrical Engineering Department, Universitas Andalas, Padang, Indonesia^1

关键词: Electrical power;    Grid-connected;    Islanding conditions;    Islanding operations;    Network reliability;    Overcurrent relay coordination;    Overcurrent relays;    Protection schemes;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/602/1/012002/pdf
DOI  :  10.1088/1757-899X/602/1/012002

学科分类：工业工程学

来源: IOP

【 摘 要 】

Islanding operation of distributed generation becomes a more appealing operation since large numbers of distributed generation have been installed worldwide. Islanding operation can improve the network reliability as the distributed generation continues providing electrical power for consumers when grid outages occur. However, the protection scheme for the islanding condition is one factor that hinders the realization. The setting of overcurrent relays on distribution network is calculated based on grid-connected condition hence the relay often fails to protect the network during islanding condition. Therefore, this paper proposes a method to establish overcurrent relay settings that coordinate correctly for both islanding and grid connected. The method tries to find a compromise between the setting for grid-connected and grid disconnected condition. The results of a case study show that method has successfully obtained a setting which provides correct coordination of the standard inverse overcurrent relay for both grid-connected an islanding condition.