access icon free Reduced order generalised integrator-based current controller applied to shunt active power filters

© The Institution of Engineering and Technology
Received 19/04/2013, Accepted 17/10/2013, Revised 20/09/2013, Published 12/12/2013

This study proposes the application of a current controller based on the reduced order generalised integrator (ROGI) to control a three-phase three-wire shunt active power filter (SAPF). The ROGI-based controller has low computational burden and it is suitable for its implementation in low-cost digital signal processors (DSPs). This controller is also frequency adaptive. This allows it to maintain its high steady-state performance despite grid frequency variations. Unlike conventional high performance SAPFs this current controller does not require the computation of high quality current references (with low distortion and total harmonic distortion below that recommended by the IEEE Std 519-1992). Therefore most of the available computational power can be used for compensating the harmonics produced by the load.

Inspec keywords: reduced order systems; frequency control; power filters; active filters; electric current control; adaptive control

Other keywords: ROGI-based controller; grid frequency variations; reduced order generalised integrator-based current controller; frequency adaptive controller; low-cost digital signal processors; SAPF; computational power; three-phase three-wire shunt active power filter; shunt active power filters; steady-state performance; DSPs; high quality current references

Subjects: Frequency control; Other power apparatus and electric machines; Self-adjusting control systems; Current control; Control of electric power systems

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