An islanding detection strategy for distribution network connected with hybrid DG resources

Abstract

Average rate of change of reactive power Bio-Mass Mini-hydro a b s t r a c tThe exponential growth in electricity demand has driven the Distributed Generation (DG) technology a boost in the power system. The use of DG is beneficial to power utilities, DG owners', and end-users in terms of reliability, power quality, and economics. However, to fully utilize the benefits of DGs, some technical issues need to be addressed. Islanding condition is one of the most important issue in this context. Until now, several islanding detection techniques have been proposed for detecting the islanding condition. This paper presents a brief overview of existing islanding detection techniques with their relative merits and demerits. Apart from this, the paper presents an islanding detection strategy suitable for hybrid DG resources of mini-hydro and Bio-Mass. The proposed strategy uses average rate of change of reactive power and load shift strategy to detect islanding of the distribution network. The performance of proposed strategy is validated on various islanding and non-islanding events. The results of proposed strategy are compared with other existing techniques in terms of fast islanding detection, and non-detection zone. The simulation results show that the proposed strategy is effective in detecting islanding phenomenon possesses fast detection and negligible non-detection zone region compared to existing islanding detection techniques.

Islanding and power quality disturbance monitoring in microgrid using adaptive cross variational mode decomposition and reduced kernel ridge regression

“…In recent years studies relating to PQ disturbances detection and event recognition are documented in several references …”

“…Despite of the advantages, the passive method of detection has the problem of nondetection zone (NDZ) identification, while the active methods can induce PQ problems in the microgrid . Further, passive islanding techniques like rate of change of frequency and voltage vector shift, voltage unbalance, and total harmonic distortions are the very simple ones but they do not offer high degree of reliability and speed of response .…”

“…Despite of the advantages, the passive method of detection has the problem of nondetection zone (NDZ) identification, while the active methods can induce PQ problems in the microgrid . Further, passive islanding techniques like rate of change of frequency and voltage vector shift, voltage unbalance, and total harmonic distortions are the very simple ones but they do not offer high degree of reliability and speed of response . Most of the techniques applied for PQ, islanding disturbances detection and classification are based on signal processing techniques like discrete wavelet transform (DWT), S‐transform (ST), Hilbert‐Huang transform/empirical mode decomposition (HHT/EMD), empirical wavelet transform (EWT), variational mode decomposition (VMD), and the pattern recognition techniques like Fuzzy, support vector machine (SVM), artificial neural network (ANN), extreme learning machine (ELM) .…”

Comparative Study of Different Approaches for Islanding Detection of Distributed Generation Systems

“…In the present power system with distributed generators (DGs), there are some issues that are not resolved yet. One of these issues involves a fast and very accurate detection of islanding [1,2]. The number of DGs introduced into electricity distribution systems is increasing day by day, and it is the most challenging concept in modern power system scenarios, since DG islanding can cause degraded proficiency, excellence, reliability and quality of supply [3,4].…”

Study on Renewable DistributedGeneration, Power Controller and IslandingManagement in Hybrid Microgrid System

“…The overall system is synchronized to the central existing grid having conventional resources with bidirectional flow of energy. The HMS will reduce the power conversion, transmission and distribution losses and has also increased the reliability of the system [10][11][12]. There are certain cases in which the central grid is not able to power the system/utility whereas distributed generator continues to power the utility which can be dangerous to utility workers and is referred as islanding.…”