cooperative control

1. Networked control and Power management
in AC/DC Hybrid Microgrids
Presented by-
Satabdy Jena
PROGRESS PRESENTATION
Under the supervision of:
Dr. N P Padhy
Professor
Department of Electrical Engineering
IIT Roorkee

2. Objectives
• Hassle-free operation of microgrids
(under extreme grid conditions, grid unbalance, irregular switching of
diverse microgrids)
• Interfacing and operating issues
• Key drivers that poses threat to prevent supply with diversified
penetration of microgrids.
• Evaluation of the various microgrids interfaced in terms of stability
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3. System block diagram
DC Bus
(48 V)
Local loads Local loads
Remote load
DC/DC
(80 V)
DC/DC
(80 V)
DC/DC
(100 V)
DC/DC
(100 V)
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4. Communication topology
Conv
I
Conv
II
Conv
III
Conv
IV
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A=[ 0 90 0 110;
90 0 100 0;
0 100 0 120;
110 0 120 0]
R=diag(0.5,1.0,1.0,0.5);
Irated=diag(6,3,3,6);

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Secondary control Primary control

6. • Converter parameters:
L=2.64 mH, r=0.1, C=8.8 mF, rd=0.1
• Line resistances:
0.5,1 Ω
• Loads:
Local loads: Rl1=30 Ω, Rl2= 20 Ω, Rl3= 20 Ω, Rl4= 20 Ω
Common loads:30 Ω
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7. Case-1 : Converter failure
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8. 1. Droop controller till 0.2s
2. Secondary control is plugged in.
3. Converter failure occurs which means its communication links are also removed.
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9. Case-2: Communication link failure
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10. • The currents of converters 1,2,3 are well shared because the communication
network among these three converters is still a connected graph.
• Converter 4 has current deviation.
• When it is separated from the network its secondary loop is disabled; voltage
reference is kept at 48 V.
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11. Case-3 : Adaptive droop
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12. • Communication failure occurs at t=0.8 to 1.2s between converter 3-4 and 3-2.
• Public load 1 connected at t=0.5s and public-load 2 at t=0.9s.
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13. Case-4: Communication latencies
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14. Thank you
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