Fault detection and location algorithm for DG-integrated distribution systems

The Journal of Engineering

Patrick Tendayi Manditereza¹  Ramesh C. Bansal² 

[1] Department of Electrical , Electronic and Computer Engineering , Central University of Technology , Free State , South Africa;Department of Electrical , Electronic and Computer Engineering , University of Pretoria , South Africa

关键词: protection algorithm;    short-circuit characteristics;    location algorithm;    possible loss;    protection function;    local measurements;    DG-integrated distribution systems;    distribution network;    settings;    adjacent zones;    peer-to-peer communications;    multiple distributed generators;    fault current contributions;    sensitivity-based electrical signature;    distribution generators;    traditional distribution system;    voltage measurements;    decision-making;    load flow;    overlapping protection zones;    overcurrent protection;    protection coordination;    modelling approach;    specific faulted node;    overlapping feature;    sensitivity calculations;   

DOI  :  10.1049/joe.2018.0247

学科分类：工程和技术（综合）

来源: IET

【 摘 要 】

The overcurrent protection on the traditional distribution system uses local measurements and settings as a basis for decision-making. However, connection of multiple distributed generators with different short-circuit characteristics makes the local measurements unpredictable, leading to possible loss of protection coordination. In order to solve this problem, this study proposes an algorithm that achieves its protection function through load flow and sensitivity calculations based on voltage measurements. The algorithm is built on a modelling approach that splits the distribution network into a series of overlapping protection zones. The overlapping feature is realised logically through peer-to-peer communications between intelligent agents located in adjacent zones. A sensitivity-based electrical signature was identified that is generated when a fault occurs within a zone. Simulation results show that the proposed protection algorithm is able to identify the zone in which the fault has occurred and the specific faulted node or line section in that zone. The fault current contributions, or no contributions, of the distributed generators (DGs) do not impact the operation of this algorithm.

【 授权许可】

CC BY