POWER DISTRIBUTION CONTROL STRATEGY OF MULTI-INPUT INTERLEAVED PARALLEL BOOST CONVERTER

Gao Shengwei; Wang Hao; Wang Yifeng; Wang Zhongjie; Chen Bo

doi:10.19912/j.0254-0096.tynxb.2021-0652

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (12) : 62-69. DOI: 10.19912/j.0254-0096.tynxb.2021-0652

POWER DISTRIBUTION CONTROL STRATEGY OF MULTI-INPUT INTERLEAVED PARALLEL BOOST CONVERTER

Gao Shengwei¹, Wang Hao¹, Wang Yifeng², Wang Zhongjie², Chen Bo²

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Abstract

The power supply system of solar UAV needs to keep the SOC of different energy storage batteries consistent at all times, so the DC/DC converter should have the basic function of power distribution to ensure the realization of the algorithm. This paper proposes a new control strategy for the bottom function of power distribution, which is an improvement on the traditional double closed-loop average current sharing method. First, the current inner loop is modified to the power inner loop, and the output of the voltage outer loop is divided by the input voltage and then multiplied by the power distribution coefficient as the new power given value to realize the power distribution function. At the same time, the automatic disturbance rejection technology is applied to the voltage outer loop to improve the response speed of the bus voltage. Finally, based on the modular concept and using GaN power switching devices, a three-input interleaved parallel Boost experimental prototype was built with a rated power of 1500 W, a rated operating frequency of 500 kHz, and a peak efficiency of 98.3%. Through experimental verification, the results show that the power distribution function can be achieved under the same input voltage or different input voltages, and it has a good dynamic response.

Key words

PV power / gallium nitride / converter / dynamic response / high frequency / power distribution

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Gao Shengwei, Wang Hao, Wang Yifeng, Wang Zhongjie, Chen Bo. POWER DISTRIBUTION CONTROL STRATEGY OF MULTI-INPUT INTERLEAVED PARALLEL BOOST CONVERTER[J]. Acta Energiae Solaris Sinica. 2022, 43(12): 62-69 https://doi.org/10.19912/j.0254-0096.tynxb.2021-0652

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