Abolfazl Elahimanesh ¹, Seyed Morteza Moghimi ², Mohammad Reza Aghamohammadi ³

Affiliations
1 Department of Electrical Engineering, University of Applied Science and Technology (UAST) of Qom, Qom, Iran
2 Department of Electrical Engineering, Jasb Branch, Islamic Azad University, Jasb, Iran
3 Department of Electrical Engineering, Power and Water University of Technology, Tehran, Iran

Abstract

Background/Objectives: Reactive power sources, network structure and active generation algorithm of power network buses are effective factors on voltage stability and static loadability extent of standard power network. Methods/Statistical analysis: Simulation programming for the paper has been done through FORTRAN which is a strong programming language in solving mathematic issues. By creating different status of generation and investigating results of 50 generation patterns in this network, it has been observed that increment in generation of some controlled existing buses improve loadability limit in comparison to other buses (3 and 6 buses to 2 and 8 buses) Findings: In this paper, the effect of Distributed Generation (DG) placement on voltage stability trend and static loadability extent of IEEE 14-bus and Iran 34-bus test standard power networks has been investigated. In order to determine places of distributed generations for improving loading extent and voltage stability, at first equivalent reactance of Thevenin buses has been recognized; Then, weak buses of the network has been identified. It should be mentioned, this research has indicated that placing DGs on these buses has an effective role on improving static loadability extent and voltage stability. Three different generation algorithms have been created in this paper in order to observe research mentioned aims. Then, static loadability extent and voltage stability have been investigated in these three cases, the most desirable and most optimum one have been chosen from them. Application/Improvements: By investigating three different states in creating generation pattern, it has been observed that placing DG on weak load buses is more proper than other ways for increasing loadability limit and voltage stability improvement.

Keywords

Distributed Generation Optimum Placement, Generation Pattern, IEEE 14-Bus Network, 34-Bus Network, Power Network Structure

Full Text

   

Ali Bostani ¹, Seyed Morteza Moghimi ², Reza Dashti ³, Seyed Mostafa Hashemi ⁴

Affiliations
1 Department of Electrical Engineering, American University of the Middle East, Egaila, KW
2 R & D Research Scientist, Microwave Soft Company, Montreal, QC, CA
3 Department of Electrical Engineering, University of Science and Technology, Tehran, IR
4 Department of Electrical Engineering, Dezful Branch, Islamic Azad University, Dezful, IR

Abstract

Objectives: The unwanted and unplanned outages due to faults occurred in electrical energy distribution systems are one of the main concerns of distribution companies. This paper examines this concerning. Methods/Statistical Analysis: This paper examines about ninety outages in related to the medium pressure power lines in second region of Bushehr over twomonth period. Findings: It has identified faults caused by power outages, and the time of outage for each fault is extracted in all regions of the primary data obtained from the power events. Then, by determining the cost function with the purely economic factors, are obtained the costs of each fault individually. In the following, for each fault are provided a series of preventive overhauls or preventive recommendations. Until increasing the system’s trustworthiness, the operating costs of unwanted faults are completely eliminated or minimized. Application/Improvements: The application of this paper is that examines the roles of preventive major maintenance in the costs of electric energy distribution companies.

Keywords

Cost Function, Electric Energy Distribution Companies, Energy Not Served (ENS), Preventive Maintenance, Unplanned Outage

Full Text