Abstract
Power system stability is a topic which is attracting considerable interest due to the increase of both electrical demand and distributed variable generation. Since Flexible AC Transmission Systems (FACTS) devices are an increasingly widespread solution to these issues, it is important to study how their allocation procedure should be done. This paper seeks to assess the influence of load share in FACTS devices allocation. Despite this interest, researchers, as well as system planners, have mainly focused on studying single power system configuration rather than using a wider approach. Keeping this in mind, we have iteratively created several load share scenarios based on an IEEE 14-bus test system. Subsequently, we have applied an heuristic procedure in order to demonstrate how load share may affect the results of the FACTS devices allocation procedure. Additionally, we have compared results from two different objective functions so as to evaluate our proposal. Finally, we have proposed a solution to FACTS allocation which takes load share into account. Our tests have revealed that, depending on the distribution of load within the power system, the optimal location for a FACTS device may change. Furthermore, we have also found some discrepancies and similarities between results from distinct objective functions.
Highlights
All over the world, power transmission grids are suffering issues such as power-line congestions or voltage instability due to rising consumption and the inclusion of new distributed and unmanageable generators, mainly PV generators and WPP [1]
In order to assess the importance of load share in Flexible AC Transmission Systems (FACTS) allocation studies, we have developed a methodology that helps us to determine its relationship
The triangle in the figures shows the best location of the STATCOM for each load share scenario
Summary
Power transmission grids are suffering issues such as power-line congestions or voltage instability due to rising consumption and the inclusion of new distributed and unmanageable generators, mainly PV generators and WPP [1]. These situations lead to a crossroads in regard to the aim of power systems planners to ensure the availability of a reliable electrical supply. Any variation in line impedances, or any reduction of available paths from generators to loads, may affect voltage profile and harm voltage stability. Any load shift or rise may modify both the voltage profile and voltage stability margin
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