Three-phase four-wire shunt active power filter working simultaneously as energy conditioner. Issue 3 (2nd May 2017)

• Record Type: Journal Article
• Authors: Szromba, Andrzej
• Is Part Of: Compel. Volume 36:Issue 3(2017)
• Page Start: 702
• Page End: 715
• Publication Date: 2017-05-02
• Subjects: Energy flow control -- Indirect control method -- Load-equivalent conductance -- Power factor correction; Electrical engineering -- Data Processing -- Periodicals; Electrical engineering -- Mathematics -- Periodicals; Electrical engineering -- Periodicals; Electronics -- Data Processing -- Periodicals; Electronics -- Mathematics -- Periodicals; 621.3
• DOI: 10.1108/COMPEL-09-2016-0412
• Languages: English
• ISSNs: 0332-1649

Abstract

Abstract : Purpose: The purpose of this study is to find a control method for three-phase four-wire shunt active power filters, which uses a load-equivalent conductance for obtaining a reference signal for compensating non-active current. Design/methodology/approach: Changes of energy stored in an active filter's reactance elements are monitored to find the active component of the load current. It is then used as a current reference to be realised as a supply source current. Computer simulation methods were used to verify the presented control method. Findings: To calculate the reference signal for the active filter action, it is enough to measure the active filter's DC-side capacitors' voltages. It has been proved that P regulators are sufficient to realise compensating current and to stabilise active filter capacitors' voltages. The supply source-neutral conductor current can be zeroed even for nonlinear and unbalanced load-generating DC-component in its neutral conductor. In addition, the active filter can buffer load-active power changes and act simultaneously as a local energy accumulator. Originality/value: This paper provides an alternative approach to address the problem of the three-phase four-wire shunt active power filter control methods.