Farm-level Interactions Study of a Novel Tri-port Soft-switching Medium-Voltage String Inverter (MVSI) based Large-scale PV-Plus-Storage Farms

Vikram Roy Chowdhury; Zheng An; Rajendra Prasad Kandula; Deepak Divan

doi:10.1109/APEC43599.2022.9773544

Farm-level Interactions Study of a Novel Tri-port Soft-switching Medium-Voltage String Inverter (MVSI) based Large-scale PV-Plus-Storage Farms

Vikram Roy Chowdhury, Zheng An, Rajendra Prasad Kandula, Deepak Divan

Research output: Contribution to conference › Paper › peer-review

2 Scopus citations

Abstract

A medium-voltage photovoltaic power conversion unit supported by battery based on a novel topology of soft switching solid state transformer is presented in this paper. It can reduce the Levelized Cost of Energy (LCOE) of PVS farm in an extended degree. However, its capability to provide grid-support services, such as frequency response, reactive power support, etc, have not been demonstrated. A series/parallel combination of these modules form a large 20 MVA solar farm. To validate them with reduced computation burden, a small-signal model of MVSI is firstly derived and validated in this paper. The model has been validated to match the full-switch model in both steady-state and dynamic conditions. Next, a farm-level simulation based on the proved small-signal model was implemented to demonstrate grid-support services. Real irradiation date from NREL is used to show the operational capabilities of the system. The overall farm is simulated based on MATLAB/Simulink domain to check the performance for various cases namely: power transfer from dc-ac side, reactive power support during grid voltage sag and utilization of battery during grid voltage disturbance or partial shading over PV panels.

Original language	English
Pages	1956-1962
Number of pages	7
DOIs	https://doi.org/10.1109/APEC43599.2022.9773544
State	Published - 2022
Externally published	Yes
Event	37th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2022 - Houston, United States Duration: Mar 20 2022 → Mar 24 2022

Conference

Conference	37th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2022
Country/Territory	United States
City	Houston
Period	03/20/22 → 03/24/22

Funding

This work was carried out at the Center for Distributed Energy, Georgia Institute of Technology. This work is sponsored by Solar Energy Technologies Office (SETO) of Department of Energy (DoE) under the award number DE-EE0008351.

Funders	Funder number
U.S. Department of Energy	DE-EE0008351
Solar Energy Technologies Office

Keywords

Photovoltaic (PV) application
Small-signal modeling
Soft switching solid state transformer (S4T)
Three-phase system

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1109/APEC43599.2022.9773544

Cite this

Chowdhury, V. R., An, Z., Kandula, R. P., & Divan, D. (2022). Farm-level Interactions Study of a Novel Tri-port Soft-switching Medium-Voltage String Inverter (MVSI) based Large-scale PV-Plus-Storage Farms. 1956-1962. Paper presented at 37th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2022, Houston, United States. https://doi.org/10.1109/APEC43599.2022.9773544

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title = "Farm-level Interactions Study of a Novel Tri-port Soft-switching Medium-Voltage String Inverter (MVSI) based Large-scale PV-Plus-Storage Farms",

abstract = "A medium-voltage photovoltaic power conversion unit supported by battery based on a novel topology of soft switching solid state transformer is presented in this paper. It can reduce the Levelized Cost of Energy (LCOE) of PVS farm in an extended degree. However, its capability to provide grid-support services, such as frequency response, reactive power support, etc, have not been demonstrated. A series/parallel combination of these modules form a large 20 MVA solar farm. To validate them with reduced computation burden, a small-signal model of MVSI is firstly derived and validated in this paper. The model has been validated to match the full-switch model in both steady-state and dynamic conditions. Next, a farm-level simulation based on the proved small-signal model was implemented to demonstrate grid-support services. Real irradiation date from NREL is used to show the operational capabilities of the system. The overall farm is simulated based on MATLAB/Simulink domain to check the performance for various cases namely: power transfer from dc-ac side, reactive power support during grid voltage sag and utilization of battery during grid voltage disturbance or partial shading over PV panels.",

keywords = "Photovoltaic (PV) application, Small-signal modeling, Soft switching solid state transformer (S4T), Three-phase system",

author = "Chowdhury, {Vikram Roy} and Zheng An and Kandula, {Rajendra Prasad} and Deepak Divan",

note = "Publisher Copyright: {\textcopyright} 2022 IEEE.; 37th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2022 ; Conference date: 20-03-2022 Through 24-03-2022",

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doi = "10.1109/APEC43599.2022.9773544",

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Chowdhury, VR, An, Z, Kandula, RP & Divan, D 2022, 'Farm-level Interactions Study of a Novel Tri-port Soft-switching Medium-Voltage String Inverter (MVSI) based Large-scale PV-Plus-Storage Farms', Paper presented at 37th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2022, Houston, United States, 03/20/22 - 03/24/22 pp. 1956-1962. https://doi.org/10.1109/APEC43599.2022.9773544

Farm-level Interactions Study of a Novel Tri-port Soft-switching Medium-Voltage String Inverter (MVSI) based Large-scale PV-Plus-Storage Farms. / Chowdhury, Vikram Roy; An, Zheng; Kandula, Rajendra Prasad et al.
2022. 1956-1962 Paper presented at 37th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2022, Houston, United States.

Research output: Contribution to conference › Paper › peer-review

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AU - Chowdhury, Vikram Roy

AU - An, Zheng

AU - Kandula, Rajendra Prasad

AU - Divan, Deepak

PY - 2022

Y1 - 2022

N2 - A medium-voltage photovoltaic power conversion unit supported by battery based on a novel topology of soft switching solid state transformer is presented in this paper. It can reduce the Levelized Cost of Energy (LCOE) of PVS farm in an extended degree. However, its capability to provide grid-support services, such as frequency response, reactive power support, etc, have not been demonstrated. A series/parallel combination of these modules form a large 20 MVA solar farm. To validate them with reduced computation burden, a small-signal model of MVSI is firstly derived and validated in this paper. The model has been validated to match the full-switch model in both steady-state and dynamic conditions. Next, a farm-level simulation based on the proved small-signal model was implemented to demonstrate grid-support services. Real irradiation date from NREL is used to show the operational capabilities of the system. The overall farm is simulated based on MATLAB/Simulink domain to check the performance for various cases namely: power transfer from dc-ac side, reactive power support during grid voltage sag and utilization of battery during grid voltage disturbance or partial shading over PV panels.

AB - A medium-voltage photovoltaic power conversion unit supported by battery based on a novel topology of soft switching solid state transformer is presented in this paper. It can reduce the Levelized Cost of Energy (LCOE) of PVS farm in an extended degree. However, its capability to provide grid-support services, such as frequency response, reactive power support, etc, have not been demonstrated. A series/parallel combination of these modules form a large 20 MVA solar farm. To validate them with reduced computation burden, a small-signal model of MVSI is firstly derived and validated in this paper. The model has been validated to match the full-switch model in both steady-state and dynamic conditions. Next, a farm-level simulation based on the proved small-signal model was implemented to demonstrate grid-support services. Real irradiation date from NREL is used to show the operational capabilities of the system. The overall farm is simulated based on MATLAB/Simulink domain to check the performance for various cases namely: power transfer from dc-ac side, reactive power support during grid voltage sag and utilization of battery during grid voltage disturbance or partial shading over PV panels.

KW - Photovoltaic (PV) application

KW - Small-signal modeling

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KW - Three-phase system

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SP - 1956

EP - 1962

T2 - 37th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2022

Y2 - 20 March 2022 through 24 March 2022

ER -

Farm-level Interactions Study of a Novel Tri-port Soft-switching Medium-Voltage String Inverter (MVSI) based Large-scale PV-Plus-Storage Farms

Abstract

Conference

Funding

Keywords

UN SDGs

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