Improving Performance of Total Harmonic Distortion Based Fault Detection Scheme for Inverter Interfaced Islanded Microgrids
Journal Title: روش های هوشمند در صنعت برق - Year 2018, Vol 9, Issue 34
Abstract
Global warming and environmental concerns have led to increasing penetration of converter interfaced renewable energy resources. One of the main challenges of inverter interfaced islanded microgrids is the fault detection. This paper investigates the performance of total harmonic distortion (THD) based fault detection scheme when various inverter topologies, main current limiting strategies, and different reference frame are employed. Then, based on this analysis, the performance of THD based fault detection scheme is improved using the instantaneous saturation limit and independent control capability in the natural reference frame. The proposed scheme does not mal-operate in the presence of non-linear loads and can distinguish fault condition from load change. Also, using the auxiliary control system, the proposed fault detection scheme is capable of detecting single line to ground fault in three wire system when synchronous/stationary reference frame is employed. Various time-domain simulations verify the effectiveness of the proposed scheme in the case of symmetrical and unsymmetrical faults.
Authors and Affiliations
Iman Sadeghkhani
New DC/DC High Step Up Isolated Converter with ZVS
In this paper we presents a soft switch sepic, flyback converter. At first the converter have hard switching in main switch and completely analysis then added auxiliary circuit for soft switching Auxiliary circuit in the...
Outage Probability of Cognitive Relay Network Considering the Interference from Primary Users on the Secondary Relay and Reciver
Cognitive Relay network is a plan to remove some problem such as the limited Coverage and limited spectrum. This strategy permit secondary users to use a frequency band( spectrum), which is dedicated to the primary users...
Rotor Design and Analysis of 4/2 SRMs to Produce Continuous Torque using Finite Element Method
Electrical and mechanical benefits, simple manufacturing and maintenance of switched reluctance motor make it suitable in industrial and home applications, but the most important drawbacks of switched reluctance motor ar...
Self-tuning Fuzzy PID Controller for Load Frequency Control in AC Micro-grid with Considering of Input Delay
A micro grid (MG) system that benefits from distributed generation (DG) resources has a non-linear and time-varying nature which encounters the control problem with some difficulties. Also, due to the fact that in the mo...
Overhead Reduction in Cooperative Spectrum Sensing Via Sequential Detection in Cognitive Radio Networks Under Bandwidth Constraint
Reliable and efficient spectrum sensing plays an important role in cognitive radio networks. On the other hand, accurate and fast sensing of spectrum is the main function of a cognitive radio for cognitive users to avoid...