Download - power transmission and distribution
Lecture – 1
IntroductionTo
Power Systems of Bangladesh
Objectives
To study & understand Power transmission & distribution
systems of Bangladesh
Dr. Abdur Razzak
EEE362 Power Transmission & Distribution
Power System
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EEE362
230 kV, 132 kV
User
Power system consists of three parts:
Generation
Transmission
Distribution
Power System (contd..)
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EEE362
Power system consists of three parts:
Generation
Transmission
Primary transmission
Secondary transmission
Distribution
Primary distribution
Secondary distribution
Consumers
Power Generation in Bangladesh
Dr. Abdur Razzak
EEE362
Generation voltage in Bangladesh
Voltage: 11 kV, Frequency: 50 Hz
Power generation companies
Public sector
Bangladesh Power Development Board (BPDB) Ashuganj Power Station Company Ltd. (APSCL)
Electricity Generation Company of Bangladesh (EGCB)
North West Power Generation Company Ltd. (NWPGCL)
West Zone Power Distribution Company Ltd. (WZPDCL)
Private sector
Summit Power Ltd. (SPL)
Rural Power Company Limited (RPCL)
Energypac Engineering Ltd.
Orion Group
Bangladesh Power Development Board (BPDB)
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EEE362
Bangladesh Power Development Board (BPDB) is a statutory body createdin May 1, 1972, by presidential Order No. 59 after bifurcation of erstwhileBangladesh Water and Power Development Authority (WAPDA).
BPDB started its operation with Generation capacity of only 180 MW. In FY2013, Generation capacity (both public and private) has increased toabout 8500 MW.
As part of reform and restructuring a number of Generation and Distributioncompanies have been created. The subsidiaries of BPDB are:
Ashuganj Power Station Company Ltd. (APSCL)
Electricity Generation Company of Bangladesh (EGCB)
North West Power Generation Company Ltd. (NWPGCL)
West Zone Power Distribution Company Ltd. (WZPDCL)
BPDB is under the Power Division of the Ministry of Power, Energy andMineral Resources, Government of Bangladesh.
Power transmission in Bangladesh
Dr. Abdur Razzak
EEE362
Transmission voltage (national grid, inter-district connection)
230 kV, 1500A and 750A
132 kV, mostly 600A, some are 1500A
Highest system (transmission) voltage
230 kV (existing), 400 kV (proposed)
400 kV (U/C) – from Baharampur, India to Veramara, Bangladesh
Highest transmission voltage in other parts of the world
India: 400 kV (existing), 800 kV (proposed), USA, Canada:765 kV
China: 1000 kV, Japan:1000 kV, Ukraine: 1150 kV (highest in the world)
Power transmission companies
Power Grid Company Bangladesh Ltd. (PGCB) is responsible for
Operation, Maintenance and Development of the transmission system of the
Country for distribution of generated electricity.
Power distribution in Bangladesh
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EEE362
Distribution voltage
33 kV, 11 kV and 11/0.4 kV
Power distribution companies
Public sectors
Outside Dhaka Metropolitan Area
Urban area: Bangladesh Power Development Board (BPDB)
Rural area: Rural Electrification Board (REB) through PBS
Private sectors
Greater Dhaka Area (Gazipur, Narayanganj, Manikganj, Munsiganj, Narsingdi)
Dhaka Electric Supply Authority (DESA)
Dhaka Metropolitan Area
Dhaka Electric Supply Company (DESCO) Limited
Outside DESA & DESCO Area
West Zone Power Distribution Company (WZPDCO) Limited
Dhaka Power Distribution Company (DPDC) Limited
Pros & cons of power systems of Bangladesh
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EEE362
Maximum power generation & demand
Maximum generation: 6675 MW (12 July, 2013)
Maximum demand? ? ? Unknown!
Per capita electricity
Per capita generation: 292 kWh (source: Energy Ministry, Sep 2013)
Total consumer: 1,32,46,000 (May 2012), DESCO: 5,04,723 (June, 2012)
Access to electricity: About 60% of total population
Tariff, peak & off-peak hours, system loss
Residential rate: Tk 3.33 (<75 units) ~Tk 9.38 (>600 units)
Commercial rate: Tk 7.22 (off-peak), Tk 9.00 (flat), Tk 11.85 (peak)
Peak & off-peak hours: 17:00~23:00 peak, 23:00~17:00 off-peak
System loss: PDB: 11.88% (June, 2012), DESCO: 8.54% (June, 2012)
Total transmission & distribution line in km
Transmission line: 3020 ckt km (230kV), 6066 ckt km (132kV) (June, 2013)
Distribution line: 2,78,000 km (June, 2011)
National power grid
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EEE362
National power grid (contd..)
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EEE362
National power grid (contd..)
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EEE362
National power grid (contd..)
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EEE362
230 kV transmission line
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EEE362
132 kV transmission line
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EEE362
132 kV transmission line (contd..)
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EEE362
Aluminum Conductor Steel-
Reinforced Cable (ACSR)
Aluminum Coated Steel-
Suported Cable (ACSS)
All Aluminum Alloy Conductor
(AAAC)
(X)Cross Linked PolyEthylene
insulated power cable (XLPE)
Transmission line cables
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EEE362
230/132 kV substations (as on June 2013)
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EEE362
132/33 kV substations (as on June 2013)
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EEE362
132/33 kV substations (contd..)
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EEE362
132/33 kV substations (contd..)
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EEE362
132/33 kV substations (contd..)
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EEE362
132/33 kV substations (contd..)
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EEE362
Electric PowerSupply Systems
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Next class…EEE362