Unified control scheme for a dual-stage grid-connected PV system with mode change

Yeqin Wang; Beibei Ren; Sanka Liyanage

doi:10.1016/j.solener.2022.04.053

Unified control scheme for a dual-stage grid-connected PV system with mode change

Yeqin Wang, Beibei Ren, Sanka Liyanage

Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

This paper proposes a unified control scheme for a dual-stage grid-connected PV system to achieve both the maximum power point tracking (MPPT) mode and the droop mode of operation with mode change. The DC-bus voltage regulation is achieved through the DC–DC converter control, and different modes of operation and the MPPT function are implemented in the DC–AC converter control, where three digital switches are designed to achieve seamless mode change. To enhance system stability and flexibility, a droop coefficient self-tuning algorithm is proposed to handle the scenario with insufficient solar irradiation in the droop mode. The effectiveness of the proposed methods is validated through both experimental and simulation studies.

Original language	English
Pages (from-to)	88-101
Number of pages	14
Journal	Solar Energy
Volume	239
DOIs	https://doi.org/10.1016/j.solener.2022.04.053
State	Published - Jun 2022

Keywords

Droop coefficient self-tuning
Mode change
PV system
Unified control scheme

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10.1016/j.solener.2022.04.053

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title = "Unified control scheme for a dual-stage grid-connected PV system with mode change",

abstract = "This paper proposes a unified control scheme for a dual-stage grid-connected PV system to achieve both the maximum power point tracking (MPPT) mode and the droop mode of operation with mode change. The DC-bus voltage regulation is achieved through the DC–DC converter control, and different modes of operation and the MPPT function are implemented in the DC–AC converter control, where three digital switches are designed to achieve seamless mode change. To enhance system stability and flexibility, a droop coefficient self-tuning algorithm is proposed to handle the scenario with insufficient solar irradiation in the droop mode. The effectiveness of the proposed methods is validated through both experimental and simulation studies.",

keywords = "Droop coefficient self-tuning, Mode change, PV system, Unified control scheme",

author = "Yeqin Wang and Beibei Ren and Sanka Liyanage",

note = "Publisher Copyright: {\textcopyright} 2022 International Solar Energy Society",

year = "2022",

month = jun,

doi = "10.1016/j.solener.2022.04.053",

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volume = "239",

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AU - Wang, Yeqin

AU - Ren, Beibei

AU - Liyanage, Sanka

PY - 2022/6

Y1 - 2022/6

N2 - This paper proposes a unified control scheme for a dual-stage grid-connected PV system to achieve both the maximum power point tracking (MPPT) mode and the droop mode of operation with mode change. The DC-bus voltage regulation is achieved through the DC–DC converter control, and different modes of operation and the MPPT function are implemented in the DC–AC converter control, where three digital switches are designed to achieve seamless mode change. To enhance system stability and flexibility, a droop coefficient self-tuning algorithm is proposed to handle the scenario with insufficient solar irradiation in the droop mode. The effectiveness of the proposed methods is validated through both experimental and simulation studies.

AB - This paper proposes a unified control scheme for a dual-stage grid-connected PV system to achieve both the maximum power point tracking (MPPT) mode and the droop mode of operation with mode change. The DC-bus voltage regulation is achieved through the DC–DC converter control, and different modes of operation and the MPPT function are implemented in the DC–AC converter control, where three digital switches are designed to achieve seamless mode change. To enhance system stability and flexibility, a droop coefficient self-tuning algorithm is proposed to handle the scenario with insufficient solar irradiation in the droop mode. The effectiveness of the proposed methods is validated through both experimental and simulation studies.

KW - Droop coefficient self-tuning

KW - Mode change

KW - PV system

KW - Unified control scheme

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SN - 0038-092X

VL - 239

SP - 88

EP - 101

JO - Solar Energy

JF - Solar Energy

ER -

Unified control scheme for a dual-stage grid-connected PV system with mode change

Abstract

Keywords

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