NDZ Analysis of Various Passive Islanding Detection Methods for Integrated DG System over Balanced Islanding

  • Ch Rami Reddy K L University, Guntur, India.
  • K Harinadha Reddy Lakireddy Bali Reddy College of Engineering (Autonomous)
Keywords: Distributed Generation (DG), Balanced islanding, Multiple passive islanding detection methods, Sensitivity analysis, ROCOPSV, ROCONSV, NDZ.

Abstract

In this paper different passive islanding detection schemes for synchronous distributed generation (DG) is presented and their performance is evaluated. Renewable DG systems place a vital role in the smart grids. One of the important problems due to such renewable DG system is an unintentional islanding. Islanding is caused if DG  still supplies power to load after disconnecting from the grid. As per the DG interconnection standards, it is required to detect the islanding within 2 seconds after islanding with the equipments connected to it. In this paper different passive islanding detection (ID) methods are compared and their performance is evaluated for wind DG systems. The combined changes of rate of change of positive sequence voltage (ROCOPSV) and current, the rate of change of negative sequence voltage (ROCONSV) and current, rate of change of frequency over reactive power (ROCOFORP) are evaluated as the better methods for islanding detection at low or zero power balanced islanding. The sensitivity analysis of these methods is simulated in MATLAB for different load variations of islanding and non islanding events. The passive methods which work under zero power imbalances with zero non detection zone (NDZ) are finalized. This analysis indicates each method has different sensitivity for islanding and non islanding events.

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Author Biographies

Ch Rami Reddy, K L University, Guntur, India.

Dr Ch Rami Reddy

Completed B. Tech, M. Tech and Ph. D from JNT University kakinada, Indinian Institute of Technology Kharagpur and Indian Institute of Technology, Delhi respectively. Guided and awarded 4 Ph.Ds in electrical engineering and currently 12 Ph. D s are working. 2 are submitted their thesis. Published several international and national journals.

His research interests are Integrated RES, Islanding detection methods, Applications of power converters, Design of multilevel inverters, Applications of special electrical machines.

 

K Harinadha Reddy, Lakireddy Bali Reddy College of Engineering (Autonomous)
K.Harinadha Reddy was born in India on july 02, 1974. He received B.E. degree in Electrical and Electronics Engineering from K.U. in 1997, India. He completed M.Tech degree in Electrical Power Systems Emphasis High Voltage Engineering from J. N. T. University - Kakinada Campus in 2006, India. He obtained Ph. D degree in Electrical Power Systems from Andhra University Campus in the year 2012. At present he is working as Professor in Electrical and Electronics Engineering department at K L University, India. 50 papers are published in various national and international journals. His research interests include AI techniques and their applications to Power System, Electrical Drives, FACT devices and Integrated Renewable Energy Systems.
Published
30-12-2019
How to Cite
Reddy, C. R., & Harinadha Reddy, K. (2019). NDZ Analysis of Various Passive Islanding Detection Methods for Integrated DG System over Balanced Islanding. International Journal of Integrated Engineering, 11(8), 206-220. Retrieved from https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/3357
Section
Articles