Voltage and Frequency Based Optimal Load Shedding using Improved Self Adaptive Harmony Search Algorithm
Raghu C N1, A. Manjunatha2, G Raghavendra3

1Raghu C N, Electrical & Electronics Engineering, Research Scholar, JAIN University , Assistant Professor , REVA University, Bengaluru, Karnataka, INDIA.
2A Manjunatha, Electrical & Electronics Engineering, Sri Krishna Institute of Technology, Visvesvaraya technological university, Karnataka, INDIA.
3G Raghavendra, Electrical & Electronics Engineering, Sapthagiri college of Engineering , Visvesvaraya technological university, Karnataka, INDIA.

Manuscript received on 25 August 2019. | Revised Manuscript received on 12 September 2019. | Manuscript published on 30 September 2019. | PP: 475-480 | Volume-8 Issue-11, September 2019. | Retrieval Number: K14090981119/2019©BEIESP | DOI: 10.35940/ijitee.K1409.0981119
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: This study presents, two load shedding scheme that are simulated on IEEE-14 bus systems are voltage dependent priority based approach and voltage and frequency based NVSI methods. The frequency-based method is designed to consider the rate of change of frequency to estimate the power loss and thereby trigger the load shedding when the frequency or rate of change of frequency exceeds the corresponding thresholds. A novel method voltage and frequency-based load shedding scheme is designed to estimate the real and reactive power losses using frequency. After estimating the power loss, the buses are indexed using the Novel Voltage Stability Index (NVSI) to select the load buses for load shedding. The loads to be shed at each of the buses are determined using the improved self adaptive harmony search(ISAHS) algorithm. Simulation results of voltage and frequency based NVSI method are presented in comparison with voltage dependent priority based approach.
Keywords: Optimal Load Shedding, Improved self adaptive Harmony Search Algorithm, Voltage collapse, Active and Reactive power. Voltage-frequency.
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