Abstract
| Original language | English |
|---|---|
| Journal | I E T Generation, Transmission and Distribution |
| Volume | 11 |
| Issue number | 3 |
| Pages (from-to) | 696-706 |
| ISSN | 1751-8687 |
| DOIs | |
| Publication status | Published - 2017 |
Keywords
- Distributed power generation
- Other power apparatus and electric machines
- Control of electric power systems
- Multivariable control systems
- decentralised control
- distributed power generation
- power capacitors
- reactive power
- network mismatches
- mathematical model
- decentralised control method
- DC microgrids
- current sharing accuracy improvement
- modified global indicator concept
- reactive power sharing improvement
- current variables
- voltage variables
- virtual capacitor
- multibus network
- voltage stabiliser
- shunt virtual resistance
- multiple dc-buses
Cite this
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Decentralised control method for DC microgrids with improved current sharing accuracy. / Yang, Jie; Jin, Xinmin; Wu, Xuezhi; Acuna, Pablo; Aguilera, Ricardo P.; Morstyn, Thomas; Agelidis, Vassilios.
In: I E T Generation, Transmission and Distribution, Vol. 11, No. 3, 2017, p. 696-706.Research output: Contribution to journal › Journal article › Research › peer-review
TY - JOUR
T1 - Decentralised control method for DC microgrids with improved current sharing accuracy
AU - Yang, Jie
AU - Jin, Xinmin
AU - Wu, Xuezhi
AU - Acuna, Pablo
AU - Aguilera, Ricardo P.
AU - Morstyn, Thomas
AU - Agelidis, Vassilios
PY - 2017
Y1 - 2017
N2 - A decentralised control method that deals with current sharing issues in dc microgrids (MGs) is proposed in this study. The proposed method is formulated in terms of ‘modified global indicator’ concept, which was originally proposed to improve reactive power sharing in ac MGs. In this work, the ‘modified global indicator’ concept is extended to coordinate dc MGs, which aims to preserve the main features offered by decentralised control methods such as no need of communication links, central controller or knowledge of the microgrid topology and parameters. This global indicator is inserted between current and voltage variables by adopting a virtual capacitor, which directly produces an output current sharing performance that is less relied on mismatches of the multi-bus network. Meanwhile, a voltage stabiliser is complementary developed to maintain output voltage magnitude at steady state through a shunt virtual resistance. The operation under multiple dc-buses is also included in order to enhance the applicability of the proposed controller. A detailed mathematical model including the effect of network mismatches is derived for analysis of the stability of the proposed controller. The feasibility and effectiveness of the proposed control strategy are validated by simulation and experimental results.
AB - A decentralised control method that deals with current sharing issues in dc microgrids (MGs) is proposed in this study. The proposed method is formulated in terms of ‘modified global indicator’ concept, which was originally proposed to improve reactive power sharing in ac MGs. In this work, the ‘modified global indicator’ concept is extended to coordinate dc MGs, which aims to preserve the main features offered by decentralised control methods such as no need of communication links, central controller or knowledge of the microgrid topology and parameters. This global indicator is inserted between current and voltage variables by adopting a virtual capacitor, which directly produces an output current sharing performance that is less relied on mismatches of the multi-bus network. Meanwhile, a voltage stabiliser is complementary developed to maintain output voltage magnitude at steady state through a shunt virtual resistance. The operation under multiple dc-buses is also included in order to enhance the applicability of the proposed controller. A detailed mathematical model including the effect of network mismatches is derived for analysis of the stability of the proposed controller. The feasibility and effectiveness of the proposed control strategy are validated by simulation and experimental results.
KW - Distributed power generation
KW - Other power apparatus and electric machines
KW - Control of electric power systems
KW - Multivariable control systems
KW - decentralised control
KW - distributed power generation
KW - power capacitors
KW - reactive power
KW - network mismatches
KW - mathematical model
KW - decentralised control method
KW - DC microgrids
KW - current sharing accuracy improvement
KW - modified global indicator concept
KW - reactive power sharing improvement
KW - current variables
KW - voltage variables
KW - virtual capacitor
KW - multibus network
KW - voltage stabiliser
KW - shunt virtual resistance
KW - multiple dc-buses
U2 - 10.1049/iet-gtd.2016.0295
DO - 10.1049/iet-gtd.2016.0295
M3 - Journal article
VL - 11
SP - 696
EP - 706
JO - I E T Generation, Transmission and Distribution
JF - I E T Generation, Transmission and Distribution
SN - 1751-8687
IS - 3
ER -