Improved Droop Method for Converter Parallel Operation in Large-Screen LCD TV Applications

Jung-Won Kim; Paul Jang

Improved Droop Method for Converter Parallel Operation in Large-Screen LCD TV Applications

Jung-Won Kim

Paul Jang

Vol. 14, No. 1, pp. 22-29, Jan. 2014

10.6113/JPE.2014.14.1.22

Adjusting output voltage set-point

Current sharing

Droop method

Parallel operation

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Abstract

Current sharing between modules in a converter parallel operation is very important for the reliability of the system. This paper proposes an improved droop method that can effectively improve current sharing accuracy. The proposed method adaptively adjusts the output voltage set-point of each module according to the current set-points. Unlike conventional droop control, modules share a signal line to communicate with each other. Nevertheless, since signals are simple and in digital form, the complexity of the circuitry is much less and noise immunity is much better than those of conventional methods utilizing communication. The operation principle and design procedure of the proposed method are described in detail. Results of the experiment on two boost converters operating in parallel under the specification of a TFT LCD TV panel power supply verify the validity of the proposed scheme.

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Cite this article

[IEEE Style]

J. Kim and P. Jang, "Improved Droop Method for Converter Parallel Operation in Large-Screen LCD TV Applications," Journal of Power Electronics, vol. 14, no. 1, pp. 22-29, 2014. DOI: 10.6113/JPE.2014.14.1.22.

[ACM Style]

Jung-Won Kim and Paul Jang. 2014. Improved Droop Method for Converter Parallel Operation in Large-Screen LCD TV Applications. Journal of Power Electronics, 14, 1, (2014), 22-29. DOI: 10.6113/JPE.2014.14.1.22.