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Multiple distribution static synchronous compensators for distribution feeder voltage support

Multiple distribution static synchronous compensators for distribution feeder voltage support

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The potential of multiple distribution static synchronous compensators (DSTATCOMs) to improve the voltage profile of radial distribution networks has been reported in the literature by few authors. However, the operation of multiple DSTATCOMs across a distribution feeder may introduce control interactions and/or voltage instability. This study proposes a control scheme that alleviates interactions among controllers and enhances proper reactive power sharing among DSTATCOMs. A generalised mathematical model is presented to analyse the interactions among any number of DSTATCOMs in the network. The criterion for controller design is developed by conducting eigenvalue analysis on this mathematical model. The proposed control scheme is tested in time domain on a sample radial distribution feeder installed with multiple DSTATCOMs and test results are presented.

Inspec keywords: power distribution control; power distribution lines; static VAr compensators; time-domain analysis; eigenvalues and eigenfunctions; reactive power control; control system synthesis

Other keywords: DSTATCOM; distribution feeder voltage support; voltage instability; controller design; eigenvalue analysis; reactive power sharing; multiple distribution static synchronous compensators; radial distribution network voltage profile; generalised mathematical model; time domain

Subjects: Control of electric power systems; Other power apparatus and electric machines; Control system analysis and synthesis methods; Power system control; Distribution networks; Algebra; Algebra

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