Control Strategy and Simulation of a Modular Multilevel Converter (MMC) Based Pump-Back System for Variable Speed Drive Application

Yunpeng Si, Qin Lei

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

A standard pump-back system consisting of two Modular Multilevel Converters (MMCs) has been proposed. Compared with traditional two-level inverter based pump-back system, the MMC based topology is able to produce a virtual grid with multilevel voltage output. In addition, energy control loops are unique for MMC to ensure the energy balance between its DC and AC side. The associating challenge is to retrieve the moving average of the capacitor energy under variable frequency condition. The basic operation principle and control strategies including all the energy and current loops have been discussed in detail. Moreover, an ABC to Alpha-Beta transformation based method has been implemented in order to solve the moving average problem. A PLECS simulation with equation based switching mode has been conducted to test the performance of the control algorithms and to improve the simulation speed. The simulation results and analysis have been provided and future work has been mentioned.

Original languageEnglish (US)
Title of host publication2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages6049-6053
Number of pages5
ISBN (Electronic)9781479973118
DOIs
StatePublished - Dec 3 2018
Event10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018 - Portland, United States
Duration: Sep 23 2018Sep 27 2018

Other

Other10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018
CountryUnited States
CityPortland
Period9/23/189/27/18

Keywords

  • ABC to Alpha-Beta transformation
  • MMC
  • Moving average
  • Pump-back system

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Control and Optimization
  • Computer Networks and Communications
  • Hardware and Architecture
  • Information Systems and Management

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    Si, Y., & Lei, Q. (2018). Control Strategy and Simulation of a Modular Multilevel Converter (MMC) Based Pump-Back System for Variable Speed Drive Application. In 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018 (pp. 6049-6053). [8558361] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ECCE.2018.8558361