Wind Power
Project by Bangladesh Power Development Board (BPDB)
Location : Anwara Upazila, Chittagong (off-shore) District.
The PDB has already selected the site for installation of the off-shore wind based power plant at Parkirchar under Anwara upazila, Chittagong.
PDB Chairman ASM Alamgir Kabir said that they have complete prequalification to install the power plants by June. International tender will be invited soon to set up the wind based power plant in Anwara.
1000 kWp Capacity Wind Battery Hybrid Power Plant at Kutubdia Island, Cox's Bazar District ( Bay of Bengal)
Bangladesh Power Development Board (BPDB) implemented the 1000 kWp capacity Wind Battery Hybrid Power Project (WBHPP) at the Kutubdia Island( Bay of Bengal) in the Cox’s Bazar District.
Under this project, total 50 nos. of 20kWp capacity Stand Alone Type Wind Turbines are being installed at Taboler Char areas of the Ali Akber Dell Union Parisahd of Kutubdia Upazilla. The total capacity of all the wind turbines is 1000 kWp( 1 MW). The Wind turbines producing electricity which being stored in battery bank. The entire system tailed as Battery Hybrid Power Plant (WBHPP). This project being installed on turn-key basis at Kutubdia, Cox’s Bazar, Bangladesh.
The wind turbines produce electricity and charges the batteries at battery banks which consisting of 1000 numbers of 200AH with capacity of 12VDC. The stored electrical power from the battery banks being converted to AC ( Alternative Current) by using inverters and distributed to the consumers through overhead power cable. This supply system exactly having 3-phase, On-Grid form and matches with conventional power AC system and loads.
For the conversion of the DC power from the batteries, total 8 nos. of 150KW capacity each inverter has been installed. These inverters give pure sine wave output. These 8 nos. of inverters have been synchronized and paralleled. So the load out put on the system is shared by all these 8 nos. of inverters. The synchronized outputs from all these 8 nos. of inverters are put together in a common bus-bar LT pane. From the common bus-bar the totaled 3-φ out put is supplied to the LT side of a 630KVA, 0.415KV/11KV step-up transformer.
The 11KV output is taken away from the project site area to the Barghop Bazar which is about 8 km away from the project control room. This 11KV power is distributed through out the consumers of the Kutubdia Upazilla Sadar through the 11KV/0.415KV step down transformers and the distribution lines.
The project was conceived in 2006 and the site was visited the author on 18/11/2006. A presentation was in the Board on 29/11/2006. The Board gave go-ahead signal for this project. Accordingly, an international tender was floated by BPDB. A contract was signed between Bangladesh Power Development Board and M/S. Pan Asia Power Services Ltd. on 22/03/2007 for the 1000KW Capacity Wind Battery Hybrid Power Project at Kutubdia, Cox's Bazar. The project implementation works started on 03/04/2007. During project implementation phase, on 15/11/2007, the Super Cyclone SIDR crossed the coastal areas of Bangladesh. There was 10 to 15 feet higher tidal surge above the dam in front of the project. All equipment and materials were submerged by those high waters. Some 3-Ton Steel Towers were taken away by those strong waves deep inside the sea. All completely ready civil construction materials including 1800 sacks of cement were fully damaged. After the SIDR, we started the implementation works again. Installation works were completed on 31/12/2007. The project testing time was from 01/01/2008 to 29/03/2008. The project was officially commissioned on 30/03/2008 by a very high level committee of BPDB.
The Battery Hybrid Power Plant (WBHPP) was officially started on 30/03/2008. The project was running well. Till 02/05/2008, total 27MWh. was generated by the WBHPP in 33 days. On 05/05/2008, the project was partially damaged by the super cyclone Nargis with the highest danger signal no. 10. To import and install the damaged equipment and materials from China and India, it took from May 05, 2008, to September 17, 2008. The project was re-started on 18 August 2008. After the devastations by the super cyclone NARGIS, we invented some innovative techniques to keep the wind turbines safe during the severe cyclones. We applied those innovative techniques later against the tropical cyclone Bijli and the tropical cyclone Aila. We were very much successful and our wind turbines were unharmed during these severe cyclones.
The WBHPP at Kutubdia contains the following equipment and materials:
Foreign/Imported Materials:
Specifications :
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Maintained by : PAN Asia Power Services Limited
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Technology imported from : China
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Daily production capacity : 800kW ( in every 6 hours = 800kW Capacity)
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Turbine height : 50 feet
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Blade : 14 Feet
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Net weight ( Blade+ Generator) : 1.2 ton
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Total Expenditure: 9 crore taka( 90 million)
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Installation year : 2007
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Construction duration : 9 months
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Commissioned : March 30, 2008
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Financial sources : BPDB
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Batteries : 1000 ( 1kWh)
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Inverter : 8
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Power : 2 transformer providing electricity o 11000V grid line
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50 Nos. 20KW capacity wind turbines
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50 Nos. Converters-cum-controllers
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150 Nos. of Blades
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8 Nos. Boosters-cum-chargers
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8 Nos. 150KW Capacity Inverters
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1 No. of Synchronization and Paralleling Panel
Local Materials: To keep the total project costs as low as possible, we have tried our best to maximize the utilization of the local equipment and materials. In the WBHPP at Kutubdia, we have used the following local materials.
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1000 Nos. of 12VDC, 200AH Batteries
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1 No. Central Control Panel Board
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2 Nos. 600KVA, 0.4KV/ 11KV Transformers
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1 No. of 11KV Grid Sub-Station
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10 km of 11 KV Transmission Line
Installation, Testing and Commissioning:
The installation and testing of all materials, equipment and machineries of the whole project have been completed by the local people. No foreign expert/engineer was required to install, run and test the equipment and machineries of the whole project. The installation and testing works of all materials, equipment and machineries of the whole project have been supervised by the author himself. Our engineers and technicians have got very valuable exposures and experiences in installation, operation and maintenance of this completely new technology project.
Electricity Generation Achievements:
The WBHPP has been running well for more than one and half years. We are supplying 0.60 to 0.80 MWH electrical energy every day at 11,000Volts. Till to date, we have supplied more than 240 MWh. electrical energy to the consumers of the Kutubdia Upazilla Sadar. This is to be mentioned here that this is the only Renewable Energy Project in Bangladesh supplying green power at 11KV voltage levels successfully and regularly.
Financial Savings and Achievements:
Kutubdia is an isolated island. Normally, electricity is generated by diesel generators in this remote island. It very expensive, difficult, highly risky and time consuming to transport diesel to this isolated island. We are replacing directly diesel with the energy generated by the Wind Battery Hybrid Power Project. When we supply electricity at 11KV levels, the diesel generators are stopped completely. Till to date, we have supplied more than 240 MWh. electrical energy to the consumers of the Kutubdia Upazilla Sadar. One kWh electricity from diesel is costing more than Tk.40.00 here in Kutubdia. So, we have already saved diesel of Tk.96,00,000.00. BPDB has earned Tk.12,00,000.00 by selling power to the consumers. So, total monetary benefits from the WBHPP is Tk.1,08,00,000.00. Moreover, we have saved Green House Gas Emissions (Carbon-Di-Oxide). We have attained these financial benefits within the running period of one year of this project.
Unique Features of the Project:
First in the country:
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This is the FIRST GRID QUALITY Renewable Energy Project in the country.
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This is the FIRST 11,000Volt running Renewable Energy Project in the country.
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This is the LARGEST running Renewable Energy Project in the country.
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This is the most SUCCESSFUL Renewable Energy Project in the country.
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This is the First RET project in the country with successful supply records of 240MWH. Electricity of grid quality 11,000Volt power.
First in the world:
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This is the largest Off-Grid Renewable Energy Project in the world.
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This is the First and Largest Wind Battery Hybrid Power Plant in the world.
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This is the First Renewable Energy Power Plant in the world with BOOSTERS.
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This is the First Renewable Energy Power Plant in the world with So many Paralleling and Serising of the 1000 pcs of 12VDC, 200AH Batteries.
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The 150KW Inverters and the synchronization and paralleling of these inverters of this project are the largest in the world of its kind.
Cost Comparisons: Plant Machineries Cost
The total global installed capacity of wind power is more than 1,30,000 MW. Wind energy technology is one of the fastest developing technologies in the world. Wind electricity has emerged as the cheapest source of grid quality renewable energy in the world. Wind power is proven all over the world. One MW grid quality AC power from wind energy costs about Tk.10.00 (normal grid connected) to 15.00 (hybrid) crores. Whereas, 1MW grid quality AC power from Solar PV will cost more than Tk.100.00 crores. Other renewable energy sources have limited scopes and very high costs in our country.
Total global installed capacity of wind energy is more than 1,30,000MW. Germany has total more that 30,000MW installed capacity of wind power. Our neighboring country India has total 12,000MW installed capacity of wind power. Wind Power plants have plant factors from 27% to 30% and with these plant factors they are technically feasible and commercially viable. Wind speed does not remain constant at all. It fluctuates in every second. It is also not available all the times of a day. Because of fluctuations in wind flow and non-availability for all times, wind electricity cannot be supplied directly to the consumers. It must be supplied either with batteries or with base-load power plants. This must be mentioned here that the Annual Plant Factor of all power plants of BPDB is from 45% to 48%. One of the most important problems faced with Kutubdia wind project is that the people of Kutubdia thought that the wind turbines will produce electricity at its full capacity 365 days in a year like the diesel generators. For the Wind Turbines, wind is the fuel and it is completely dependent on nature. The wind flow is very weak in the Winter Season and good during the Summer Season. During morning hours up to 10 O-Clock, the wind is very weak or zero. From 10:00 AM, wind starts to blow and at about 12:00 Noon, the wind is good for electricity generation. Summer winds are better for electricity generation that the Winter winds. The electricity generation from this 1MW capacity power is 0 to 400KW during winter season (November to February) and 0 to 800KW in the Monsoon Season (March to October) depending on the available wind speeds. Sometimes, the wind is very good but sometimes it is zero. So, we cannot supply 1MW electricity all the times of a day and 365 days of a year. When we started to supply wind electricity for 3 hours during day times and 3 to 4 hours during night times, the people and some high level engineers of BPDB ordered us to supply 1MW power for 24 hours. They think that the 1MW plant will generate 1MW power even little wind is there irrespective of wind speed. Now, the people of Kutubdia and engineers of BPDB are understanding the real situation.
Cyclones Faced by the Project:
SIDR: During project implementation phase, on 15/11/2007, the Super Cyclone SIDR crossed the coastal areas of Bangladesh. There was 10 to 15 feet higher tidal surge above the dam in front of the project. All equipment and materials were submerged by those high waters. Some 3-Ton Steel Towers were taken away by those strong waves deep inside the sea. All completely ready civil construction materials including 1800 sacks of cement were fully damaged. After the SIDR, we started the implementation works again. Installation works were completed on 31/12/2007.
Nargis: The Tropical Cyclone Reshmi crossed the coastal areas of Bangladesh on 5 May 2008 with danger signal no. 10 and with winds of about 200 to 240 km/hr. Our project was partially harmed and we supplied power after about 3 months of this cyclone.
Reshmi : The Tropical Cyclone Reshmi crossed the coastal areas of Bangladesh on 28 October 2008 with danger signal no. 6 and with winds of about 140 to 160km/hr. Our project was not harmed and we supplied power just after 2 days of this cyclone.
Bijli : The Tropical Cyclone Bijli crossed the coastal areas of Bangladesh on 18 April 2009 with danger signal no. 7 and with winds of about 150 to 180km/hr.
Our project was not harmed and we supplied power just after 3 days of this cyclone. But the dam was partially damaged.
Aila : The Tropical Cyclone Aila crossed the coastal areas of Bangladesh on 25 May April 2009 with danger signal no. 7 and with winds of about 150 to 180km/hr. Our project was not harmed and we supplied power just after 3 days of this cyclone. But the damaged was completely washed away.
After all these six severe cyclones and also some dangerous tornadoes, all 50 nos. wind turbines are running very well and we are still supplying electricity for 5 to 6 hours everyday at the maximum capacity of the WBHPP. So, cyclones and tornadoes are no more the main hindrances for wind power exploitation.
Technical Achievements:
We have been operating and maintaining this wind energy project for more than one and half years. During this operation and maintenance period, we have faced many challenging problems. We have invented local solutions and have solved all those challenging problems with locally available equipment and materials. We have invented very easy solutions to the most complicated and delicate problems of the equipment materials of the Wind Battery Hybrid Power Plant.
Potentials of Wind Energy in Bangladesh:
My company has measured wind speeds at four locations in the coastal areas of Bangladesh. These locations are (1) Parky Saikat near Patenga, Chittagong; (2) Mognamaghat, Pekua, Cox's Bazar; (3) Muhuri Dam, Sonagazi, Feni; and (4) Kuakata, Patuakhali. These four sites are representatives of the entire coastal areas of our country. We have seen that the annual average wind speed in these four sites is more than 6.5 m/s.
It an internationally accepted thumb rule that a site having annual average wind speed of 6.0 m/s or higher is feasible for harnessing wind electricity with commercial viability. From our preliminary data, we can understand that generating electrical energy with commercial viability in Bangladesh is possible.
We have more than 1400 km coastal lines (including all curvatures) along the Bay of Bengal. The average capacity of the most widely installed and most popular grid connected wind turbine in India and other countries is 2 MW. Up to 10km distance inside from the coastal belt is very much suitable for wind energy harnessing without any effect of the terrains or roughness classes. So, the area of the highly prospective zone for wind power harnessing along the coastal areas is about 1400x10 ˜14,000sq.km. Our coastal is thickly populated. More 3 to 4 crore people are living in those areas. Our coastal areas have many golden resources like salt, fish, shrimp etc. So, 100% of this 14,000sq.km prospective areas will not be available for harnessing wind power. The land used by wind turbines can be easily used for other purposes. In light of all these circumstances, if we consider, only 20% of this total propective zone to be available for the installation of the wind turbines, it is about 3500sq.km. It is possible to install 10 to 15 wind turbines of 2MW capacity in 1sq.km area. So, in only 20% of our coastal areas which is highly prospective for wind power, we can install up to 28,000 MW of wind turbines. These potentials are only for the grid connected wind turbines.
Moreover, in the remote and isolated islands, we can install small wind turbines of up to 20KW capacity and thus we can fulfill their constitutional rights for grid quality electricity. The small scale wind turbines can be installed at any remote and isolated place in the country at any time.
Natural Coincidence:
In our country, the peak windy season is from April to September i.e. during the Summer Season. The Summer Season is also peak demand season for electricity. So, the increased demand for electricity during the Summer Season can easily be satisfied by the wind electricity available from the higher monsoon winds.
Multiple Purposes of the WBHPP:
The WBHPP at Kutubdia has become a tourist spot. In last year, we got more than 20,000 visitors for the WBHPP at Kutubdia. Moreover, the project can serve as a training centre for human resource development for further such type of projects in the country and also in abroad.
Conclusion:
Each citizen and all areas of the country have the constitutional rights not for 12Volt electricity but for 440V, 50Hz grid quality. The whole country is suffering from severe load-shedding during the peak hours of 19:00hrs to 24:00 hrs. But with the help of the Wind Battery Hybrid Power Plant, there was no load-shedding at Kutubdia during the peak demand hours in last one and half years. Our people have become so much skilled that only few persons can install the small wind turbines at any place in the country at any time. So, the electricity demand of the remote and isolated islands of Bangladesh can be satisfied with the small scale wind turbines. Unlike solar PV, they can run small and cottage industry machineries with the perfect 440Volt AC, 50Hz grid quality wind power. Thus, wind power can play an important role for the overall socio-economic development of Bangladesh.
(Md. Fazlur Rahman is a renewable energy consultant managing director, Pan Asia Power Services Ltd.)
Picture :
Wind Turbines of 1000 kWp Capacity Wind Battery Hybrid Power Project at Kutubdia Island, Cox's Bazar District ( Bay of Bengal)
Picture : Anemometers and Wind Turbines of 1000 kWp Capacity Wind Battery Hybrid Power Project at Kutubdia Island, Cox's Bazar District ( Bay of Bengal)
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Wind Turbines of 1000 kWp Capacity Wind Battery Hybrid Power Project at Kutubdia Island, Cox's Bazar District ( Bay of Bengal)
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Wind Turbines of 1000 kWp Capacity Wind Battery Hybrid Power Project at Kutubdia Island, Cox's Bazar District ( Bay of Bengal)
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Control room of 1000 kWp Capacity Wind Battery Hybrid Power Project at Kutubdia Island, Cox's Bazar District ( Bay of Bengal)
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Inverter of 1000 kWp Capacity Wind Battery Hybrid Power Project at Kutubdia Island, Cox's Bazar District ( Bay of Bengal)
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Battery Bank of 1000 kWp Capacity Wind Battery Hybrid Power Project at Kutubdia Island, Cox's Bazar District ( Bay of Bengal)
Picture : Overhead grid distribution line of 1000 kWp Capacity Wind Battery Hybrid Power Project at Kutubdia Island, Cox's Bazar District ( Bay of Bengal)
Grid Connected Wind Energy Project at Muhuri Dam areas by Bangladesh Power Development Board (BPDB):
BPDB has implemented a pilot project of 0.90 MW capacity of the Grid Connected Wind Energy (GCWE) at the Muhuri Dam Areas in the Feni distrct in 2004. The installation, commissioning and erection works of 4 units of the 225 kWp GCWE turbines at this site had been completed in 2004. This is the first ever Grid Connected Wind Energy project in Bangladesh. The grid connected wind turbines generate electricity at 440V. This is stepped up by the 0.440KV/11KV step-up transformers at then fed into the nearly 11KV distribution lines.
Thus generating electricity from wind in the coastal areas can be transmitted to other regions of the country through the high voltage transmission lines. Very little operation and maintenance will be required during the whole life time of wind turbines and no fuel will be required for generating electricity from wind.
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| Pilot project of 0.90 MW capacity of the Grid Connected Wind turbines in the Muhuri Dam areas at Feni District |
BPDB established a Wind Resource Assessment Station (WRAS) at the Moghnama Ghat under Cox's Bazar district is being started. The installation, commissioning, erection, testing etc. works of this WRAS have been completed in December 2003. Wind monitoring by this WRAS has been started in December 2003. So far wind resource data of 5 months of this site have been gathered and these data shows the clear viability of Grid Connected Wind Energy at this site. BPDB is planning for another 0.90 MW pilot project at this site. The pilot for this site is expected to be implemented very soon. Another WRAS installation at Kuakhata is under process to measure the wind potential at that location.
Wind energy installation under renewable Energy Programme (REP):
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Energy Resource : Wind Turbine
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Type of installation : Water pumping wind mill Irrigation
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No of installation : 1
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Capacity of installation : 1X1.0 kWp, 3X1.5 kWp, 1X10 kWp
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Cost of Installation :
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Location of Installation : Patenga (Coastal Area), Chittagong)
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Functional Status : Functioning
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Energy Resource : Wind
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Type of installation : Resource Assessment
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Location of Installation : Coastal Districts
Total installation by BPDB = 2 MW
Wind Resource Assessment Station at Feni
BPDB installed a 160 feet tower at the Muhuri Dam site in the Feni district in May 2003. Two high resolution Anemometers were installed on this tower, one Anemometer at 80 feet and the other at 160 feet height. One Wind Vane has been installed at 80 feet height.
The average wind speed, till to date, at the Muhuri Dam areas is 6.50 m/s. For the financial viability of the Grid Connected Wind Turbines, the required annual average wind speed is 6 m/s. So, the wind speeds of the Muhuri Dam areas are encouraging for the grid connected wind energy projects at the project site areas of the Muhuri Dam in the Feni district. The site area is large enough for the larger Wind Energy Projects. The grid is within 0.50 km from the site. The project site is also connected by concrete roads. For all these reasons, the project site area emerges as one of the most suitable areas for grid connected wind farm in Bangladesh.
Studying the pattern of wind blowing over Bangladesh, it has been discovered that the peak windy season of a year coincides with the peak demand for electricity of the country. So, generating electricity from wind with the Grid Connected Wind Turbines, can contribute greatly to cater the increased demand during summer peak season.
Wind Resource Assessment Station at Moghnama Ghat, Cox’s Bazar
BPDB also installed another Wind Resource Assessment Station (WRAS) at the Mognamaghat site in the Cox’s Bazar District. The Installation, commissioning, erection, testing etc. works of this WRAS were completed in December 2003. Wind monitoring by this WRAS started in December 2003. The annual average wind speed at this site is also more than 6.5 m/s.
The site area is large enough for the larger Wind Energy Projects. The grid is within 10 km from the site. The project site is also connected by concrete roads. For all these reasons, the project site area emerges as one of the most suitable areas for grid connected wind farm in Bangladesh.
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