Shirvan Combined Cycle Power Plant (gas sector)
6 Nov 2011 15:59
The power plant’s first, second, third, fourth and fifth units were connected to the Sangrun Network on 15 March 2005, 10 May 2006, 5 July 2006, 6 September 2006 and 18 February 2007 respectively.
Shirvan Combined Cycle Power Plant (gas unit)
In order to implement the policies of the country’s Five-Year Development Plan and the necessity to supply electricity to strengthen the country’s national grid, the construction of the gas sectors of new combined-cycle power plants was handed over to the Iran Electricity Development Company in 1998. Considering that the electricity industry is planning to construct seven power plants and the necessity to supply 30 gas turbine units (159 V94.2 MW) a contract was signed and exchanged in 1999 with the Iran Power Plant Projects Management Company for the transfer of technology for stage by stage manufacture of gas turbines in Iran. In line with this, the manufacture and montage of turbines and generators were assigned to the Tuga and the Pars Generator Company respectively.
Considering the increasing demand for electricity in the northeast of the country due to the development of industries, agriculture industries and the enhancement of social and public levels in that region, the construction of gas units of the Shirvan combined-cycle power plant was placed on the agenda of the Iran Electricity Development Company. Based on the initial contract construction work on a power plant with four gas units began in 2003 on the 12th km of the Quchan-Shirvan expressway.
This power plant plays a prominent role in preserving the electricity network’s resistance and meeting the region’s ever-increasing electricity demand.
The Moshanir Power Engineering Consultants Company is in charge of supervising all of the contractor’s activities. Moreover, the Qods Niroo Company’s engineering consultants acts as consultants in the project.
The power plant’s first, second, third, fourth and fifth units were connected to the Sangrun Network on 15 March 2005, 10 May 2006, 5 July 2006, 6 September 2006 and 18 February 2007 respectively. Work on the sixth unit began on 23 February 2007.
As mentioned, this contract is for the transfer of technology. Domestic capabilities have been used to manufacture the equipment. This is to the extent that in comparison to other similar projects, the country’s share in the construction of this power plant has increased to 30 more units which is the equivalent of an 85 percent increase.
The power plant’s main fuel is natural gas. A contract was signed in November 2005 between the National Iranian Gas Company (NIGC) and Iranian Electricity Development Company on the supply of this fuel and a major part of the financial commitments have been fulfilled. The NIGC has pledged to supply gas via a transfer line to the power plant, and a gas pressure reduction station near the power plant with a capacity of 300,000 standard cubic metres per hour.
Considering that the country’s national grid needs the electricity produced by the Shirvan Power Plant, especially during this summer’s peak times and in face of the problems of gasoline supply, its necessary for the NIGC to speed up work on the transfer line and the gas pressure reduction station so that it will become possible to produce electricity continuously.
The power plant’s secondary fuel is gasoline which is supplied by tankers and stored in two 20,000 cubic metre cylinders.
The water needed for construction work on the power plant is supplied by two wells (with a capacity of three litres per second each) near the power plant. In order to supply the water needed for the operation of the gas units and the construction of steam units, The IEDC has signed a contract with the North Khorasan Regional Water Company on the extraction of water with a rate of 15 litres per second from the Barzu dam’s regulation band, situated northeast Shirvan. The contract on the supply, in 2008, of 45 litres per second of water needed for the construction and operation of the steam units are at the exchange stage.
Vegetation work begins on some 22.5 hectares of the power plant’s land in order to stabilize the soil and purify the air entering turbines. The energy produced by the power plant will be transferred to the national grid via a 400.132 KV outpost to the south of the plant which has four 400 KV, and six 132 KV feeders and 400.132 transformers.
Moreover, Khorasan Province’s Regional Electricity Company is working on four 400-KV transmission lines between the Shirvan Power Plant post and the 400-KV Esfarayan, Tus and Sabzevar outposts to transfer energy from the power plant’s outpost to the national grid. The 400-KV Shirvan-Asfarayen is currently operating and the project for the Shirvan-Tus transfer line is still being implemented.
Overall specifications of Shirvan Combined-Cycle Power Plant project
1 For whole of project 30 gas turbine units
2 Number of gas units 6 units
3 Capacity of each gas unit 159 MW
4 Power plant location 12 km from Shirvan
5 Power plant’s outpost voltage 400.132 with six 132-KV output feeders and four 400 KV feeders
6 Main fuel Natural gas
7 Auxiliary fuel Gasoline
8 Total gas consumption (for six units) 270000 cubic metres per hour
9 Total gasoline consumption (for six units) 280 cubic metres per hour
10 Gas turbine type 94.2 volts
11 Water supply source during construction Two wells with a capacity of 3 litres/sec
12 Water supply source during operation Barzu Dam
13 Site area 120 hectares
14 Height from sea level 1115 metres
15 Average regional temperature 13 degrees Celsius
16 Maximum wind speed for design 40 metres per second
17 Main wind direction West to east
18 Earthquake design quotient 0.23 G
Volume of executive operations
Operation Unit Predicted amount Completed amount
1 Cubic metres 112.000 117.128
2 Rebar placement Tonnes 3.115 3.632
3 Concrete work Cubic metres 56.000 61.613
4 Metal skeleton Tonnes 3.771 3.261
5 Excavation work Cubic metres 250.000 296.107
6 Installation Tonnes 10.300 9.618
