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A capacitor overvoltage elimination strategy for reduced-voltage-sensor-based MMC
- Source :
- International Journal of Electrical Power & Energy Systems. 132:107181
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- As modular multilevel converter(MMC) requires a large number of sensors to measure capacitor voltages, reducing the number of sensors for MMC has become an emerging topic. One of the technical challenges for reduced-voltage-sensor-based MMC operated with NLM is to eliminate the overvoltage that occurred on submodules. In order to solve this problem, a capacitor overvoltage elimination strategy for reduced-voltage-sensor-based MMC is proposed in this paper. The overvoltage elimination is consists of pre-measurement and in-process measurement of capacitor voltage, which is to obtain the actual value of submodule capacitor voltage so that to sort submodule capacitor voltages in the correct sequence. In this way, the submodules with excessively high voltage or with overvoltage trends can be selected for discharging until their voltages reach the normal level. Therefore, the overvoltage that occurred on submodules can be eliminated. A 31-level single-phase MMC simulation model is performed in MATLAB/SIMULINK, and a 9-level one is constructed in an experimental laboratory. Both the simulation and experimental results verify the effectiveness of the proposal even in the situation of capacitance parameter deviation.
- Subjects :
- business.industry
Computer science
020209 energy
020208 electrical & electronic engineering
Energy Engineering and Power Technology
High voltage
Hardware_PERFORMANCEANDRELIABILITY
02 engineering and technology
Modular design
Capacitance
law.invention
Capacitor
Hardware_GENERAL
Overvoltage
Control theory
law
Voltage sensor
Hardware_INTEGRATEDCIRCUITS
0202 electrical engineering, electronic engineering, information engineering
Electrical and Electronic Engineering
business
MATLAB
computer
Voltage
computer.programming_language
Subjects
Details
- ISSN :
- 01420615
- Volume :
- 132
- Database :
- OpenAIRE
- Journal :
- International Journal of Electrical Power & Energy Systems
- Accession number :
- edsair.doi...........bbf5aa32cb0621eb486154d4eb9677d1