Effect of Distributed Generation Units on Stability Improving Trend of IEEE 14 and 34 Bus Test Network Voltage

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.