Model predictive control of a capacitorless matrix converter-based STATCOM

Mohammad B. Shadmand, Mostafa Mosa, Robert Balog, Haitham Abu-Rub

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

This paper presents the concept of a capacitorless static synchronous compensator (STATCOM) that uses a matrix converter (MC) and model predictive control (MPC) to compensate lagging power factor (p.f.) loads using inductors instead of electrolytic capacitors (e-caps) for energy storage. Although ubiquitous in power electronic converters, e-caps have well-known failure modes and wear-out mechanisms. In practice, the bus capacitors in a voltage-sourced inverter reactive power compensator may require monitoring and replacement, which can increase the cost of ownership of a traditional reactive power compensation method. The proposed MPC-MC-STATCOM uses a × direct MC, which when properly controlled using finite-set MPC, creates a phase shift of 180° from the input to output current, and thus supplies reactive power to the utility grid using inductors instead of the e-caps. This paper presents the fundamental concept and model derivation. The theoretical analysis is accompanied by simulation and experimental results that verify the intended operation of the controls and circuity in steady state under ideal grid conditions and dynamically to demonstrate robustness of the MPC control under step changes in grid voltage distortion and load characteristics. The conclusion is that the capacitorless STATCOM can provide the reactive power needed to compensate lagging p.f. load.

Original languageEnglish
Article number7782299
Pages (from-to)796-808
Number of pages13
JournalIEEE Journal of Emerging and Selected Topics in Power Electronics
Volume5
Issue number2
DOIs
Publication statusPublished - 1 Jun 2017

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Keywords

  • Matrix converter (MC)
  • Model predictive control (MPC)
  • Reactive power compensation
  • Synchronous compensator (STATCOM)

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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