overlay of mtdc grid to relieve power congestion of …overlay of mtdc grid to relieve power...
TRANSCRIPT
Overlay of MTDC grid to Relieve Power Congestion ofPower System
Lokesh Dewanganand
Prof. Himanshu Bahirat
Indian Institute of Technology Bombay
September 6, 2017
Lokesh Dewangan and Prof. Himanshu Bahirat (IITB)RE Grid Integration Conference India 2017 September 6, 2017 1 / 14
Contents
1 Introduction of MTDC system
2 Renewable growth in India
3 Power congestion in transmission line
4 HVDC grid overlay
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Introduction of MTDC system
(a) CGRE banchmark model
1 Advantages of VSC over LCC based converter station
Power reversal simply current reversal
Independent active reactive power control
No reactive power requirement
Low order harmonics
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Motivation
(b) European supergrid
Remote location of renewable energy sources
Voltage profile improvement and congestion relieving
Reliable power supply and segmented large grid
Stability improvement
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Vision of MTDC in Indian grid
Figure: Location of renewable sources in India
Away from load center load.
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Wind Growth in India
Figure: Wind installation scenario
Table: Wind Installed Capacity
States Wind Installed
Andhra Pradesh 1393.5Gujarat 4030.65
Karnataka 2878.3Kerala 43.4
Madhya Pradesh 2171.9Maharastra 4670.65Rajasthan 3994.9Tamil Nadu 7652.15Telangana 77.5
1 Wind injection buses
Distance from wind farmVoltage ratingAvailability of extra additioncapacity
1 MTDC terminal buses
Congested linesNeed of voltage and powercontrolFrequency support andasynchronous connection
Lokesh Dewangan and Prof. Himanshu Bahirat (IITB)RE Grid Integration Conference India 2017 September 6, 2017 6 / 14
Without wind integration
Figure: SLD of grid without wind Integration
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Without wind integration
Figure: Without wind integration
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With wind integration
Figure: SLD of grid with wind integration
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With wind integration
(a) With 1.5 GW wind integration (b) With 3.0 GW wind integration
(c) With 5.2 GW wind integration
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Overlay of MTDC grid
Figure: SLD of grid with wind and MTDC grid
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Overlay of MTDC grid
(a) First HVDC line (b) Second HVDC line
(c) Third and fourth HVDC lines (d) Fifth and sixth HVDC lines
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Conclusion and future scope
1 Conclusion
Wind integration will congest the existing AC line
Wind injection and MTDC terminals are identified
MTDC system has eliminated the power congestion
2 Future scope
Stability analysis of combined AC/DC grid
Conversion of one AC line to DC line on double circuit line.
Voltage profile and cost benefit analysis.
LCC interaction with VSC station.
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Lokesh Dewangan and Prof. Himanshu Bahirat (IITB)RE Grid Integration Conference India 2017 September 6, 2017 14 / 14