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Islanding Detection of DG and Improvement of Stability by using Inverter Control Scheme


Author(s):

Y. Pavani , SRI VENKATESWARA UNIVERSITY,TIRUPATI,CHITTOOR,A.P,INDIA.; B. Ramesh, SRI ANNAMACHARYA INSTITUTE OF TECHNOLOGY & SCIENCE,RAJAMPET,KADAPA,A.P,INDIA.

Keywords:

Distributed generation (DG), inverter control algorithm, islanding detection, phase-locked loop (PLL) independent control, stability

Abstract:

The design of inverter controller is to improve both system stability and islanding detection performance with the Non Detection Zone (NDZ). The islanding operation for DG system can cause a number of negative impacts on a microgrid and the DG system itself, such as safety hazards, power quality problems, and serious damage to the system unless the main utility power is restored correctly and quickly. To solve these problems, several recent researchers have developed two types of islanding detection methods (IDMs) with high-performance. One is the power and voltage (P-V) characteristic of load based IDM, and the other is the inverter’s switching frequency based IDM. The proposed controller uses the magnitude and phase of measured voltage directly instead of Park’s transformation. It does not need an instant phase of point of common coupling (PCC) voltage, which is required in the conventional controller. In the viewpoint of protection, the proposed controller provided the better islanding detection performance than the conventional controller by reducing the detection time. The simulation results shows the effectiveness of the proposed controller has better performance than the convention controller.


Other Details:

Manuscript Id :IJSTEV4I5008
Published in :Volume : 4, Issue : 5
Publication Date: 01/12/2017
Page(s): 65-76
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