### Abstract

Voltage stability is one of the major concerns in operational and planning of modern power system. Many strategies have been implemented to avoid voltage collapse, which the load shedding considered as the last option. However, optimization is needed to estimate the minimum amount to shed so as to prevent voltage instability. In this paper, an effective method is presented for estimating the optimal amount of load to be shed in a distribution system based on the gravitational search algorithm (GSA). The voltage stability margin (VSM) of the system has been considered in the objective function. The optimization problem is formulated to maximize the VSM of the system and at the same time satisfying the operation and security constraints. The optimum solution depends on the predefined constraints such as the number of load buses available to shed and the maximum amount of load permitted to shed. Simulation result conducted on the IEEE 33 bus radial distribution system shows that the system voltage stability can be improved by optimally shedding the loads at critical system buses. The results also indicate that the numbers of load buses available for load shedding does not have a significant impact on voltage stability margin, but it is highly dependent on the maximum amount of load permitted to shed.

Original language | English |
---|---|

Pages (from-to) | 71-76 |

Number of pages | 6 |

Journal | Jurnal Teknologi (Sciences and Engineering) |

Volume | 68 |

Issue number | 3 |

Publication status | Published - 2014 |

### Fingerprint

### Keywords

- Gravity search algorithm (GSA)
- Linear static index
- Radial distribution system (RDS)
- Voltage stability margin (VSM)

### ASJC Scopus subject areas

- Engineering(all)

### Cite this

*Jurnal Teknologi (Sciences and Engineering)*,

*68*(3), 71-76.

**An optimal load shedding methodology for radial power distribution systems to improve static voltage stability margin using gravity search algorithm.** / Khamis, Aziah; Shareef, H.; Mohamed, Azah; Bizkevelci, Erdal.

Research output: Contribution to journal › Article

*Jurnal Teknologi (Sciences and Engineering)*, vol. 68, no. 3, pp. 71-76.

}

TY - JOUR

T1 - An optimal load shedding methodology for radial power distribution systems to improve static voltage stability margin using gravity search algorithm

AU - Khamis, Aziah

AU - Shareef, H.

AU - Mohamed, Azah

AU - Bizkevelci, Erdal

PY - 2014

Y1 - 2014

N2 - Voltage stability is one of the major concerns in operational and planning of modern power system. Many strategies have been implemented to avoid voltage collapse, which the load shedding considered as the last option. However, optimization is needed to estimate the minimum amount to shed so as to prevent voltage instability. In this paper, an effective method is presented for estimating the optimal amount of load to be shed in a distribution system based on the gravitational search algorithm (GSA). The voltage stability margin (VSM) of the system has been considered in the objective function. The optimization problem is formulated to maximize the VSM of the system and at the same time satisfying the operation and security constraints. The optimum solution depends on the predefined constraints such as the number of load buses available to shed and the maximum amount of load permitted to shed. Simulation result conducted on the IEEE 33 bus radial distribution system shows that the system voltage stability can be improved by optimally shedding the loads at critical system buses. The results also indicate that the numbers of load buses available for load shedding does not have a significant impact on voltage stability margin, but it is highly dependent on the maximum amount of load permitted to shed.

AB - Voltage stability is one of the major concerns in operational and planning of modern power system. Many strategies have been implemented to avoid voltage collapse, which the load shedding considered as the last option. However, optimization is needed to estimate the minimum amount to shed so as to prevent voltage instability. In this paper, an effective method is presented for estimating the optimal amount of load to be shed in a distribution system based on the gravitational search algorithm (GSA). The voltage stability margin (VSM) of the system has been considered in the objective function. The optimization problem is formulated to maximize the VSM of the system and at the same time satisfying the operation and security constraints. The optimum solution depends on the predefined constraints such as the number of load buses available to shed and the maximum amount of load permitted to shed. Simulation result conducted on the IEEE 33 bus radial distribution system shows that the system voltage stability can be improved by optimally shedding the loads at critical system buses. The results also indicate that the numbers of load buses available for load shedding does not have a significant impact on voltage stability margin, but it is highly dependent on the maximum amount of load permitted to shed.

KW - Gravity search algorithm (GSA)

KW - Linear static index

KW - Radial distribution system (RDS)

KW - Voltage stability margin (VSM)

UR - http://www.scopus.com/inward/record.url?scp=84900855933&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84900855933&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:84900855933

VL - 68

SP - 71

EP - 76

JO - Jurnal Teknologi

JF - Jurnal Teknologi

SN - 0127-9696

IS - 3

ER -