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 language | English (US) |
|---|---|
| Title of host publication | 2018 IEEE Energy Conversion Congress and Exposition, ECCE 2018 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 6049-6053 |
| Number of pages | 5 |
| ISBN (Electronic) | 9781479973118 |
| DOIs | |
| State | Published - Dec 3 2018 |
| Event | 10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018 - Portland, United States Duration: Sep 23 2018 → Sep 27 2018 |
Other
| Other | 10th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2018 |
|---|---|
| Country/Territory | United States |
| City | Portland |
| Period | 9/23/18 → 9/27/18 |
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