Abstract
Distributed generation (DG) resources integration into power system results in environmental and economic benefits. However, technical challenges may create many problems for the distribution system. Islanding detection is the topmost technical perspective regarding distribution system protection. This paper devised a passive islanding detection strategy that employed voltage phase angle (VPA). The VPA is selected after the performance assessment of 6 passive indices. Comparative study proves that VPA has the best accuracy and sensitivity compared to other indices parameters. The proposed technique is employed on a generic system that easily distinguished islanding situations from non-islanding cases such as load increment, load decrement, capacitor energization, capacitor de-energization, motor starting, motor unloading and various types of faults switching scenarios. The protective method is simple and has a quick interpretation algorithm as compared to other existing methods. The study is carried out on IEEE 1547 general test system in MATLAB/SIMULINK environment. The proposed strategy has nearly zero non-detection zone.
Highlights
The installation of distributed generation units in the power system creates an islanding situation that is damaging to equipment and grid personnel
This paper presents a passive islanding detection technique employing voltage phase angle
The voltage phase angle is selected after the comprehensive performance evaluation of six different passive power indices
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. 16 different rates of changes are considered and a new passive parameter based on the rate of change of frequency over reactive power (df/dq) is proposed in terms of sensitivity and performance In [42], the passive islanding detection method has been developed by combining under frequency (UF), over frequency (OF), rate of change of frequency (ROCOF), phase angle difference, rate of change of voltage (ROCOV) and rate of change of phase angle difference (ROCOPAD) This method has the advantages of zero NDZ and fast tripping time. The abovementioned passive islanding detection methods are either suffer from one of the issues like NDZ, power quality issue, large tripping time or have complexity in the algorithm.
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