Parameter Design of DCMG System Under Large Signal Stability and Static Voltage Constraints

DC microgrid (DCMG) is characterized by a high degree of power electronics, low system inertia, and CPL (CPL) with a negative damping feature. Its system-level transient stability is of great concern. The stability of a DCMG system is affected by many factors, such as component parameters, load type...

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Published inIEEE systems journal Vol. 18; no. 1; pp. 367 - 378
Main Authors Zhang, Zifan, Yang, Xiangyu, Zhao, Shiwei, Wu, Danlan, Gao, Mengzhen, Wang, Zhidong
Format Journal Article
LanguageEnglish
Published New York IEEE 01.03.2024
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Coefficients
Control methods
Damping
DC microgrid (DCMG)
Design parameters
Deviation
Distributed generation
droop control
Electric potential
Energy storage
Indicators
large signal stability
Liapunov direct method
Microgrids
parameter selection
Power supplies
Power system stability
Resistance
Stability analysis
Stability criteria
static voltage constraint
Steady-state
Systems stability
Transient stability
Voltage
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Abstract DC microgrid (DCMG) is characterized by a high degree of power electronics, low system inertia, and CPL (CPL) with a negative damping feature. Its system-level transient stability is of great concern. The stability of a DCMG system is affected by many factors, such as component parameters, load types, converter control methods, etc. To analyze the system-level stability of the DCMG, the constraints of large signal stability of the DCMG based on droop control are derived by using the Lyapunov direct method. Based on this conclusion, the influence of system parameters on large signal stability and voltage deviation of the DCMG is revealed, and the optional range of filter element parameters and droop coefficient under the stability and voltage constraints is proposed. The parameter selection work involves two evaluation indicators, system stability, and voltage deviation. This article uses the variable weight coefficient method to normalize these two indicators into a comprehensive evaluation index, and the appropriate droop coefficient is selected based on the optimal comprehensive evaluation index. The work of this article has reference values for the parameter design of the DCMG system components and the selection of the droop coefficient.
AbstractList DC microgrid (DCMG) is characterized by a high degree of power electronics, low system inertia, and CPL (CPL) with a negative damping feature. Its system-level transient stability is of great concern. The stability of a DCMG system is affected by many factors, such as component parameters, load types, converter control methods, etc. To analyze the system-level stability of the DCMG, the constraints of large signal stability of the DCMG based on droop control are derived by using the Lyapunov direct method. Based on this conclusion, the influence of system parameters on large signal stability and voltage deviation of the DCMG is revealed, and the optional range of filter element parameters and droop coefficient under the stability and voltage constraints is proposed. The parameter selection work involves two evaluation indicators, system stability, and voltage deviation. This article uses the variable weight coefficient method to normalize these two indicators into a comprehensive evaluation index, and the appropriate droop coefficient is selected based on the optimal comprehensive evaluation index. The work of this article has reference values for the parameter design of the DCMG system components and the selection of the droop coefficient.
Author Zhang, Zifan
Wang, Zhidong
Wu, Danlan
Yang, Xiangyu
Zhao, Shiwei
Gao, Mengzhen
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SubjectTerms Coefficients
Control methods
Damping
DC microgrid (DCMG)
Design parameters
Deviation
Distributed generation
droop control
Electric potential
Energy storage
Indicators
large signal stability
Liapunov direct method
Microgrids
parameter selection
Power supplies
Power system stability
Resistance
Stability analysis
Stability criteria
static voltage constraint
Steady-state
Systems stability
Transient stability
Voltage
Title Parameter Design of DCMG System Under Large Signal Stability and Static Voltage Constraints
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