TY - JOUR
T1 - Power quality of DC microgrid
T2 - Index classification, definition, correlation analysis and cases study
AU - Liao, Jianquan
AU - Liu, Yangtao
AU - Guo, Chunsheng
AU - Zhou, Niancheng
AU - Wang, Qianggang
AU - Kang, Wenfa
AU - Vasquez, Juan C.
AU - Guerrero, Josep M.
N1 - Publisher Copyright:
© 2024 The Author(s)
PY - 2024/2
Y1 - 2024/2
N2 - DC microgrid has a promising future for its strong power supply capacity, good controllability, and high efficiency. The power quality of the DC microgrid is one of the core issues of planning, design, operation, and control. However, due to the zero-frequency characteristic of DC system, its power quality presents new characteristics. This paper analyzes the differences between AC and DC power quality and constructs the DC power quality index system. The DC harmonic, voltage fluctuation and flicker, voltage sag, voltage unbalances, and voltage deviations are defined according to the existing literature and standards. Moreover, the correlation between harmonics and fluctuations, voltage deviations and steady-state unbalances, voltage sags and transient unbalances are analyzed. Subsequently, the typical cases of the DC microgrids are selected to analyze the generation mechanism of each power quality phenomenon under different working conditions. According to the proposed index definition, the quantitative relationship between the indexes and the related parameters is obtained. The simulation cases are built to verify the generation mechanism and index relevance.
AB - DC microgrid has a promising future for its strong power supply capacity, good controllability, and high efficiency. The power quality of the DC microgrid is one of the core issues of planning, design, operation, and control. However, due to the zero-frequency characteristic of DC system, its power quality presents new characteristics. This paper analyzes the differences between AC and DC power quality and constructs the DC power quality index system. The DC harmonic, voltage fluctuation and flicker, voltage sag, voltage unbalances, and voltage deviations are defined according to the existing literature and standards. Moreover, the correlation between harmonics and fluctuations, voltage deviations and steady-state unbalances, voltage sags and transient unbalances are analyzed. Subsequently, the typical cases of the DC microgrids are selected to analyze the generation mechanism of each power quality phenomenon under different working conditions. According to the proposed index definition, the quantitative relationship between the indexes and the related parameters is obtained. The simulation cases are built to verify the generation mechanism and index relevance.
KW - Correlation analysis
KW - DC microgrid
KW - Index definition
KW - Power quality
UR - http://www.scopus.com/inward/record.url?scp=85183731273&partnerID=8YFLogxK
U2 - 10.1016/j.ijepes.2024.109782
DO - 10.1016/j.ijepes.2024.109782
M3 - Journal article
AN - SCOPUS:85183731273
SN - 0142-0615
VL - 156
JO - International Journal of Electrical Power and Energy Systems
JF - International Journal of Electrical Power and Energy Systems
M1 - 109782
ER -