Sequence Component-Based Improved Passive Islanding Detection Method for Distribution System with Distributed Generations

Abstract

In distributed generation (DG) systems, the rate of change of voltage and the rate of change of frequency are the two most common and widely used simple and low-cost passive islanding detection schemes. Unfortunately, these passive islanding detection schemes find limitation for detecting the islandings that cause very small power imbalance. In this paper, an improved passive islanding detection scheme is proposed by using the two newly derived indices from the sequence components of the current signal with the conventional voltage and frequency parameters. The performance of the proposed scheme is tested for numerous islanding and non-islanding cases generated on IEEE Std 399–1997 and IEC microgrid model distribution system integrated with both inverter-interfaced and synchronous DGs through PSCAD/EMTDC. The obtained results confirm the effectiveness of the proposed scheme.

An Extensive Overview of Islanding Detection Strategies of Active Distributed Generations in Sustainable Microgrids

“…Intentional islanding is a somehow planned situation whereas unintentional islanding occurs during several changes in the system [24]. The major challenge faced by the system due to the addition of ADGs is unintentional islanding, leading to various problems of insufficient grounding of equipment and two-way power flow, causing the loss of safety of workers, affecting the synchronism of the voltage and frequency of synchronous generators and converters (inverters) [25,26], and causing power quality (sag and swell) issues due to the reverse power flow phenomena. Islanding identification is a crucial and challenging job involved with integrated power distribution networks [27][28][29][30][31][32].…”

“…The kind of ADG and system parameters will have a big impact on the technique choice for islanding detection [57,63]. In recent years, hybrid IDSs have been proposed, and it appears that the hybrid IDSs are the best option for detecting islanding when changes in system parameters are significant and when launching an active IDS when those changes are not significant enough for a passive IDS to make an absolute unequal treatment [25,94].…”

Voltage Rise Problem in Distribution Networks with Distributed Generation: A Review of Technologies, Impact and Mitigation Approaches

“…The sequence component-based improved passive islanding detection method has been proposed for DNs with distributed generation technologies [155]. The authors identified a shortcoming of passive islanding detection strategy in terms of their incapability of determining or detecting island the results in a slight power imbalance.…”

FPGA implementation of an Islanding detection technique for microgrid using periodic maxima of superimposed voltage components

“…Also, it has high computational complexity. In [26], passive IDT based on zerosequence current and negative sequence current is used. Here, three types of threshold values are used to discriminate the islanding from the non-islanding events that increase the computational cost and also increases the detection time.…”