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This paper focuses on discussing, the transmission networks need to be browbeaten ever more completely. The transfer capacity of an existing transmission network needs to be increased without main reserves but also without compromising the security of power scheme. The more efficient use of transmission network has already led to a situation in which many power systems are operated more often and longer close to voltage stability limits. A power system stressed. Methodology: This search was carried on all articles, such as books and some Journals which help me for discussing the voltage stability. Read through the JSTOR website, IEEE have been used to get into this paper. Findings: Model originally refers to the disturbance of developing an amount archetype that precisely explain the lot of important characteristics and behavior (steady-state or dynamic) to be advised in the ability arrangement abstraction of interest. It as well includes anticipation the lot of acceptable ways to cover the load. Research Limitations/Implications: The limitation limited and the statistic are that is not easy to get the specific result of these factors. Moreover, the effected crossing the Voltage Stability has been as limited and how the activity could be affected. For instance, the results of the case analysis will then be analyzed in the proceeding chapter. As a case study, the chapter will look at voltage stability that exists in distribution systems. This is in the presence of a distributed generation. Finally, it is clear that the problem with voltage stability is usually concerned with the entirety of power systems but in essence, it is just one critical area where the problem is involved. Practical Implications: In this section the implication of In order to investigate the stability of transient voltage, a bolted three phased fault is applied. The clearing time for the fault is set differently for different distributed generation. The term voltage stability is used in power systems to refer to the ability of a system to maintain voltage under acceptable profiles when subjected to different load changes and system topologies. A system can be unstable because of the transportation of reactive power over long distances. Originality/value: This value for voltage stability can cause a system to collapse. At any point in time, the condition that operates a power system should be stable. There are various operational criteria that the system has to meet in order to function as required. Environmental and economic constraints make it possible to for power systems to operate nearer to their stability limits. It is therefore both important and challenging to maintain a system that is secure and stable. In recent years, planners and researchers of power system have concentrated much of their attention on voltage stability of systems.