Power Systems Engineering Research Center

S-78G Project Summary 

Efficient modeling of modular multilevel converters for fast simulation of large-scale MMC-HVDC embedded power systems

Summary Modular multilevel converters (MMCs) have become the most attractive multilevel converter topology for voltage-sourced converter high-voltage direct current (VSC-HVDC) transmission systems. The salient features of MMCs include: 1) modularity and scalability to meet any voltage level by stacking up additional numbers of SMs without increasing topology complexity, 2) inherent redundancy and fault-tolerance capability to improve reliability, 3) high efficiency suitable for high-power applications, and 4) high power quality and low filter and transformer cost due to filter-free and transformerless applications by realization of high-level converters. With the increasing number of MMC- HVDC systems embedded into the AC grid, performance of the present power system can be dramatically improved, including stability, reliability, capacity, and efficiency. However, MMCs¿ applications in power systems are restricted due to the challenge to efficiently and accurately model a variety of such power electronics-based components for large-scale power system analysis, modeling, and simulation. In this project, the PI proposes to investigate and develop new generalized high-efficiency modeling techniques, with covering various submodule (SM) circuits and MMC topologies, which can be used and integrated in electromagnetic transient (EMT) power system simulation software packages and real-time hardware-in-the-loop (HIL) simulation platforms for large-scale MMCs-embedded power system analysis and simulation.
Academic Team Members Project Leader: Jiangchao Qin (Arizona State University, jquin@asu.edu)
Industry Team Members Di Shi, Xi Chen, Zhiwei Wang (GEIRI North America)
Project Period February 1, 2017 to January 31, 2018