POD-PWM applied to circulating current control in HVDC-MMC based system
Authors:
- 1 November 2015
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- p. 1-5
Abstract
The Modular Multilevel Converter (MMC) control presents more technical challenges than the regular 2-level Voltage Sourced Converters (VSC) one. One of the most common type of control investigaded in literature is based on techniques such as the Phase Opposite Disposition PWM (POD-PWM), which include balancing capacitor voltages and circulating current control. This paper presents some details that are not clearly explored in the main references about this theme. The control system implementation is described and its performance is evaluated through an HVDC-MMC based system simulation using the Matlab Simulink software. The results show that the circulating current control is more effective if the total number of submodules connected at the same time (positive arm plus negative arm) is not constant, and most control techniques do not take advantage of this. Besides, the results show that the effect on the DC current is negligible.Keywords
This publication has 8 references indexed in Scilit:
- Circulating Current Control in MMC Under the Unbalanced VoltageIEEE Transactions on Power Delivery, 2013
- Control and modulation strategies for modular multilevel converter based HVDC system2011
- Reduced Switching-Frequency Modulation and Circulating Current Suppression for Modular Multilevel ConvertersIEEE Transactions on Power Delivery, 2011
- Modular Multilevel Converter: An universal concept for HVDC-Networks and extended DC-Bus-applications2010
- Prospects of multilevel VSC technologies for power transmission2008
- Instantaneous Power Theory and Applications to Power Conditioning2006
- An innovative modular multilevel converter topology suitable for a wide power range2004
- Multilevel inverters: a survey of topologies, controls, and applicationsIEEE Transactions on Industrial Electronics, 2002