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

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\textemdash 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, 98.89% efficiency, and an LCOE reduction of 3.6%.

Authors:
 [1];  [2];  [1];  [2];  [3];  [2];  [3];  [2];  [3]
  1. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
  2. University of Colorado
  3. University of Washington
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S); USDOE National Renewable Energy Laboratory (NREL), Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1569962
Report Number(s):
NREL/CP-5D00-74141
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: Presented at the 2019 IEEE Energy Conversion Congress and Exposition (IEEE ECCE), 29 September-3 October 2019, Baltimore, Maryland
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 24 POWER TRANSMISSION AND DISTRIBUTION; levelized cost of electricity; design optimization; multilevel converter

Citation Formats

Seo, Gabsu, Mukherjee, Satyaki, Roy, Jinia, Goodrick, Kyle, Mallik, Rahul, Majmunovic, Branko, Dutta, Soham, Maksimovic, Dragan, and Johnson, Brian. Levelized-Cost-of-Electricity-Driven Design Optimization for Medium-Voltage Transformerless Photovoltaic Converters: Preprint. United States: N. p., 2019. Web.
Seo, Gabsu, Mukherjee, Satyaki, Roy, Jinia, Goodrick, Kyle, Mallik, Rahul, Majmunovic, Branko, Dutta, Soham, Maksimovic, Dragan, & Johnson, Brian. Levelized-Cost-of-Electricity-Driven Design Optimization for Medium-Voltage Transformerless Photovoltaic Converters: Preprint. United States.
Seo, Gabsu, Mukherjee, Satyaki, Roy, Jinia, Goodrick, Kyle, Mallik, Rahul, Majmunovic, Branko, Dutta, Soham, Maksimovic, Dragan, and Johnson, Brian. Fri . "Levelized-Cost-of-Electricity-Driven Design Optimization for Medium-Voltage Transformerless Photovoltaic Converters: Preprint". United States. https://www.osti.gov/servlets/purl/1569962.
@article{osti_1569962,
title = {Levelized-Cost-of-Electricity-Driven Design Optimization for Medium-Voltage Transformerless Photovoltaic Converters: Preprint},
author = {Seo, Gabsu and Mukherjee, Satyaki and Roy, Jinia and Goodrick, Kyle and Mallik, Rahul and Majmunovic, Branko and Dutta, Soham and Maksimovic, Dragan and Johnson, Brian},
abstractNote = {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\textemdash 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, 98.89% efficiency, and an LCOE reduction of 3.6%.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {10}
}

Conference:
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