

FOLLOWUS
State Key Laboratory of Power Electronics, Zhejiang University, Hangzhou 310027, China
Lu-jun WANG, E-mail: wanglujun@zju.edu.cn
Received:26 October 2011,
Revised:2012-;5-;4,
Published:2012-07
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Lu-jun WANG, Tao YANG, Da-min ZHANG, et al. A high performance simulation methodology for multilevel grid-connected inverters[J]. Frontiers of Information Technology & Electronic Engineering, 2012, 13(7): 544-551.
Lu-jun WANG, Tao YANG, Da-min ZHANG, et al. A high performance simulation methodology for multilevel grid-connected inverters[J]. Frontiers of Information Technology & Electronic Engineering, 2012, 13(7): 544-551. DOI: 10.1631/jzus.C1100315.
To design a high reliability multilevel grid-connected inverter
a high performance simulation methodology based on Saber is proposed. The simulation methodology with optimized simulation speed can simulate the factors that have significant impacts on the stability and performance of the control system
such as digital delay
dead band
and the quantization error. The control algorithm in the simulation methodology is implemented using the C language
which facilitates the future porting to an actual system since most actual digital controllers are programmed in the C language. The modeling of the control system is focused mainly on diode-clamped three-level grid-connected inverters
and simulations for other topologies can be easily built based on this simulation. An example of designing a proportional-resonant (PR) controller with the aid of the simulation is introduced. The integer scaling effect in fixed-point digital signal processors (DSPs) on the control system is demonstrated and the performance of the controller is validated through experiments.
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