ABSTRACT:
This
work introduces a replacement advent for power flow control of interconnected
AC-DC micro-grids in hybrid micro-grids connected to grids. It also supports
implementing an Adaptive Neuro Fuzzy Inference System (ANFIS) controlled
modified Unified Inter-Phase Power Controller (UIPC). For study, a classic
hybrid micro-grid connected to grid comprising of a AC micro-grid and a DC
micro-grid is taken into account. These micro-grids are interconnected
employing a modified UIPC, rather than using the power converters connected in
parallel. As the first input of this paper is the standard structure of UIPC,
which used three power converters in every phase. It was then modified such as
number of power converters is used less and implemented for the control of the
exchange of power between AC-DC microgrids. In every phase there is one power
electronic converter in the improved structure. It is called as Line Power
Converter (LPC). Also there is Bus Power Converter (BPC) to regulate the
voltage of the DC bus. The Line Power Converters links the AC micro-grid to the
main grid. The DC buses are also linked with them. It can be operated in
Inductance Mode (IM) as well as Capacitance Mode (CM). The control structure of
LPCs has an Adaptive Fuzzy Logic Controller in it. For hybrid micro-grids, the
capability of the suggested power flow control strategy is confirmed by the
MATLAB simulation results.
KEYWORDS:
1. Ac
micro-grid
2. Dc
micro-grid
3. Grid
control
4. Hybrid
micro-grid
5. UIPC
6. UPFC
SOFTWARE:
MATLAB/SIMULINK
CONCLUSION:
The
hybrid micro-grid structure is the favorable option in the future smart grids
to gather together the renewable resources for AC/DC loads. This is because of
the fact that this structure holds the merits of AC as well as DC micro-grids simultaneously.
There is one conventional problem with this structure. That is to efficiently
control the exchange of power within interconnected micro-grids comprising of
AC and DC system. In this particular work, an ANFIS controlled UIPC solution is
suggested as a superior alternative to the power electronic converters
connected in parallel which have brought many problems. An improved design of
the UIPC was initially suggested and then effective strategies for control are
presented for the modified UIPC. The results of simulation are used to validate
the modified model along with performance of the control of power exchange
between micro-grids having AC and DC system.
REFERENCES:
[1]
H.a. Pan M. Ding R. Bi L. Sun Research on Cooperative Planning of Distributed Generation
Access to AC/DC Distribution (Micro) Grids Based on Analytical Target Cascading
Energies 12 10 2019 1847. (https://doi.org/10.3390/
en12101847)
[2]
Du Yi, Jiang Daozhuo, Yin Rui, Pengfei Hu, Wang Yufen, ‘‘Modeling and simulation
of DC distribution network based on distributed energy” 2013 2nd International
Symposium on Instrumentation & Measurement, Sensor Network and Automation
(IMSNA)
[3]
J.M. Guerrero J.C. Vasquez J. Matas L.G. de Vicuna M. Castilla Hierarchical Control
of Droop-Controlled AC and DC Microgrids—A General Approach Toward
Standardization IEEE Trans. Ind. Electron. 58 1 2011 158 172 10.1109/ TIE.2010.2066534
http://ieeexplore.ieee.org/document/5546958/
[4]
JiaLihu, ‘‘Architecture Design for New AC-DC Hybrid Micro-grid”, DC Microgrids (ICDCM),
IEEE First International Conference on, 2015.
[5]
D. Riana Aryani and Hwachang Song, ‘‘Coordination Control Strategy for AC/DC Hybrid
Microgrids in Stand-Alone Mode‘‘ Energies 9 6 2016 469. (https://doi. org/10.3390/en9060469)
