Levelized-Cost-of-Electricity-Driven Design Optimization for Medium-Voltage Transformerless Photovoltaic Converters

Gabsu Seo; Satyaki Mukherjee; Kyle Goodrick; Rahul Mallik; Branko Majmunovic; Soham Dutta; Dragan Maksimovic; Brian Johnson; Jinia Roy

doi:10.1109/ECCE.2019.8913063

Levelized-Cost-of-Electricity-Driven Design Optimization for Medium-Voltage Transformerless Photovoltaic Converters

Gabsu Seo, Satyaki Mukherjee, Kyle Goodrick, Rahul Mallik, Branko Majmunovic, Soham Dutta, Dragan Maksimovic, Brian Johnson, Jinia Roy

Power Systems Engineering

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

6 Scopus Citations

Abstract

Design approaches for power electronics are typically focused on efficiency and power density; however, these strategies do not guarantee cost optimality in any well-defined sense. To overcome this shortcoming, we propose a design framework that yields circuit parameters that minimize the levelized cost of electricity (LCOE) of a generation system. LCOE serves as a meaningful metric since it captures total lifetime costs - including hardware, balance of system, and maintenance costs - and includes the impacts of power conversion efficiency and revenue from harvested energy. To obtain a tractable design problem, we formulate an approximate LCOE improvement model that quantifies the changes in LCOE resulting from a candidate converter design. We apply this framework to a multilevel cascaded topology for low-voltage dc to medium-voltage ac conversion without line-frequency transformers. An example 200 kW commercial-scale system is studied and the solution yields a design with 15 cascaded stages, 98.01% efficiency, and an LCOE reduction of 2.0%.

Original language	American English
Pages	6973-6980
Number of pages	8
DOIs	https://doi.org/10.1109/ECCE.2019.8913063 https://doi.org/10.1109/ECCE.2019.8913063
State	Published - Sep 2019
Event	11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019 - Baltimore, United States Duration: 29 Sep 2019 → 3 Oct 2019

Conference

Conference	11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019
Country/Territory	United States
City	Baltimore
Period	29/09/19 → 3/10/19

Bibliographical note

See NREL/CP-5D00-74141 for preprint

NREL Publication Number

NREL/CP-5D00-75852

Keywords

Design optimization
Levelized cost of electricity
Multilevel converters

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Cite this

Seo, G., Mukherjee, S., Goodrick, K., Mallik, R., Majmunovic, B., Dutta, S., Maksimovic, D., Johnson, B., & Roy, J. (2019). Levelized-Cost-of-Electricity-Driven Design Optimization for Medium-Voltage Transformerless Photovoltaic Converters. 6973-6980. Paper presented at 11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019, Baltimore, United States. https://doi.org/10.1109/ECCE.2019.8913063, https://doi.org/10.1109/ECCE.2019.8913063

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abstract = "Design approaches for power electronics are typically focused on efficiency and power density; however, these strategies do not guarantee cost optimality in any well-defined sense. To overcome this shortcoming, we propose a design framework that yields circuit parameters that minimize the levelized cost of electricity (LCOE) of a generation system. LCOE serves as a meaningful metric since it captures total lifetime costs - including hardware, balance of system, and maintenance costs - and includes the impacts of power conversion efficiency and revenue from harvested energy. To obtain a tractable design problem, we formulate an approximate LCOE improvement model that quantifies the changes in LCOE resulting from a candidate converter design. We apply this framework to a multilevel cascaded topology for low-voltage dc to medium-voltage ac conversion without line-frequency transformers. An example 200 kW commercial-scale system is studied and the solution yields a design with 15 cascaded stages, 98.01% efficiency, and an LCOE reduction of 2.0%.",

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Seo, G, Mukherjee, S, Goodrick, K, Mallik, R, Majmunovic, B, Dutta, S, Maksimovic, D, Johnson, B & Roy, J 2019, 'Levelized-Cost-of-Electricity-Driven Design Optimization for Medium-Voltage Transformerless Photovoltaic Converters', Paper presented at 11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019, Baltimore, United States, 29/09/19 - 3/10/19 pp. 6973-6980. https://doi.org/10.1109/ECCE.2019.8913063, https://doi.org/10.1109/ECCE.2019.8913063

Levelized-Cost-of-Electricity-Driven Design Optimization for Medium-Voltage Transformerless Photovoltaic Converters. / Seo, Gabsu; Mukherjee, Satyaki; Goodrick, Kyle et al.
2019. 6973-6980 Paper presented at 11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019, Baltimore, United States.

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

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AU - Mallik, Rahul

AU - Majmunovic, Branko

AU - Dutta, Soham

AU - Maksimovic, Dragan

AU - Johnson, Brian

AU - Roy, Jinia

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N2 - Design approaches for power electronics are typically focused on efficiency and power density; however, these strategies do not guarantee cost optimality in any well-defined sense. To overcome this shortcoming, we propose a design framework that yields circuit parameters that minimize the levelized cost of electricity (LCOE) of a generation system. LCOE serves as a meaningful metric since it captures total lifetime costs - including hardware, balance of system, and maintenance costs - and includes the impacts of power conversion efficiency and revenue from harvested energy. To obtain a tractable design problem, we formulate an approximate LCOE improvement model that quantifies the changes in LCOE resulting from a candidate converter design. We apply this framework to a multilevel cascaded topology for low-voltage dc to medium-voltage ac conversion without line-frequency transformers. An example 200 kW commercial-scale system is studied and the solution yields a design with 15 cascaded stages, 98.01% efficiency, and an LCOE reduction of 2.0%.

AB - Design approaches for power electronics are typically focused on efficiency and power density; however, these strategies do not guarantee cost optimality in any well-defined sense. To overcome this shortcoming, we propose a design framework that yields circuit parameters that minimize the levelized cost of electricity (LCOE) of a generation system. LCOE serves as a meaningful metric since it captures total lifetime costs - including hardware, balance of system, and maintenance costs - and includes the impacts of power conversion efficiency and revenue from harvested energy. To obtain a tractable design problem, we formulate an approximate LCOE improvement model that quantifies the changes in LCOE resulting from a candidate converter design. We apply this framework to a multilevel cascaded topology for low-voltage dc to medium-voltage ac conversion without line-frequency transformers. An example 200 kW commercial-scale system is studied and the solution yields a design with 15 cascaded stages, 98.01% efficiency, and an LCOE reduction of 2.0%.

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T2 - 11th Annual IEEE Energy Conversion Congress and Exposition, ECCE 2019

Y2 - 29 September 2019 through 3 October 2019

ER -

Levelized-Cost-of-Electricity-Driven Design Optimization for Medium-Voltage Transformerless Photovoltaic Converters

Abstract

Conference

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NREL Publication Number

Keywords

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