IEC16850 standard-based islanding detection algorithm for distributed generator integrated power systems

Abstract

The integration of DGs in power system network is related with several protection and security challenges. The islanding detection is one of major problems, when the power grids' service is disconnected while the DGs are still in use. As a result of this phenomena, stability and power quality may worsen as the DGs may not be able to maintain voltage and frequency. The security of the utility employees may also be at risk during the islanding stage. Due to the harmful effects of unplanned islanding brought on by high DG penetration. Technical standards like UL 1741, IEEE 1547, and IEEE 929 have all addressed the islanding phenomena. Load shedding and island detection systems are used if the synchronized generator is unable to meet demand according to the literature. The distributed energy resources were used in this study to concentrate on the islanding detection scheme for distribution systems. The load flow is examined under various system operating conditions of the distribution system. The fault analysis is carried out to determine the protective configuration settings for the case study under consideration and to analyse the breaker capacity. For the distribution systems under consideration, the research looked into voltage-based protection mechanisms. In order to test the protection functioning of the micro grid system, a lab-scale protection test bench is set up at the CPUT CSAEMS laboratory utilizing a generator protection relay and test injection device. The IEC 61850 engineering configuration based on GTNET-GSE protocol using ICT600 tool is performed within RSCAD simulation environment. The project implemented the hardware-in-the-loop simulation using real-time digital simulator to evaluate the voltage and frequency-based protection functions of the considered distribution system. Simulations were used to carry out the performance evaluation of the hardwired and GOOSE simulations. The simulation's findings show that the simulated distribution system satisfies the protection requirements for both hardwired and IEC61850 GOOSE applications.