Lecture – 1

IntroductionTo

Power Systems of Bangladesh

Objectives

To study & understand Power transmission & distribution

systems of Bangladesh

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Power System

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230 kV, 132 kV

User

Power system consists of three parts:

Generation

Transmission

Distribution

Power System (contd..)

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Power system consists of three parts:

Generation

Transmission

Primary transmission

Secondary transmission

Distribution

Primary distribution

Secondary distribution

Consumers

Power Generation in Bangladesh

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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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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

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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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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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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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National power grid (contd..)

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National power grid (contd..)

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National power grid (contd..)

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230 kV transmission line

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132 kV transmission line

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132 kV transmission line (contd..)

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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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230/132 kV substations (as on June 2013)

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132/33 kV substations (as on June 2013)

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132/33 kV substations (contd..)

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132/33 kV substations (contd..)

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132/33 kV substations (contd..)

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132/33 kV substations (contd..)

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Electric PowerSupply Systems

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