Power Loss and Junction Temperature Analysis in the Modular Multilevel Converters for HVDC Transmission Systems

The power loss of the controllable switches in modular multilevel converter (MMC) HVDC transmission systems is animportant factor, which can determine the design of the operating junction temperatures. Due to the dc current component, theapproximate calculation tool provided by the manufacturer of the switches cannot be used for the losses of the switches in theMMC. Based on the enabled probabilities of each SM in an arm, the current analytical models of the switches can be determined. The average and RMS currents can be obtained from the corresponding current analytical model. Then, the conduction losses canbe calculated, and the switching losses of the switches can be estimated according to the upper limit of the switching frequency. Finally, the thermal resistance model of the switches can be utilized, and the junction temperatures can be estimated. Acomparison between the calculation and PSCAD simulation results shows that the proposed method is effective for estimatingthe junction temperatures of the switches in the MMC.

Statistics

Show / Hide Statistics

Cumulative Counts from September 30th, 2019
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.

Cite this article

[IEEE Style]

H. Wang, G. Tang, Z. He, J. Cao, "Power Loss and Junction Temperature Analysis in the Modular Multilevel Converters for HVDC Transmission Systems," Journal of Power Electronics, vol. 15, no. 3, pp. 685-694, 2015. DOI: 10.6113/JPE.2015.15.3.685.

[ACM Style]

Haitian Wang, Guangfu Tang, Zhiyuan He, and Junzheng Cao. 2015. Power Loss and Junction Temperature Analysis in the Modular Multilevel Converters for HVDC Transmission Systems. Journal of Power Electronics, 15, 3, (2015), 685-694. DOI: 10.6113/JPE.2015.15.3.685.