Performance Evaluation of DSTATCOM for 180 km 33 kV Feeder from Shinyanga to Bariadi in Tanzania

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Jordan Journal of Electrical Engineering (JJEE)
Tanzanian medium voltage of 33 kV and 11 kV is used as the system voltage for primary distribution feeders. The design of these feeders is mainly radial topology. Due to the nature of dispersed and scattered load centers (towns) in Tanzania [1], the feeders have to run over long routes, such as the 180 km 33 kV Shinyanga–Bariadi line [2]. The feeder runs all this distance without any voltage control compensators; thus at the receiving end, it suffers a voltage drop of more than 7%. The result of this voltage drop is failing to start the large water pumping motors connected close to the end of the feeder, especially during peak load. Voltage improvement can be achieved using the volt-ampere reactive (VAR) compensation, series compensation and flexible alternating current transmission system (FACTS). However, these methods cannot handle dynamic voltage changes effectively. Therefore, fast reactive power compensation is necessary [3]. Distribution static synchronous compensator (DSTATCOM) can provide fast and continuous reactive power (𝑄) compensation to control the voltage of the feeder. However, off-the-shelf DSTATCOM cannot be used without the knowledge of the line parameters, control, power and other data of the feeder. Therefore, this paper proposes the use of the DSTATCOM for the 180 km 33 kV feeder for the Shinyanga– Bariadi line.
Distribution static compensators, Voltage source converters, Nominal 𝜋� mode