Vinh Tan 4 is a 1,800MW super-critical thermal power plant currently under development in Binh Thuan, Vietnam.
Vietnam Electricity (EVN) is developing the power plant, which will have a combined annual output of 10.8 billion kilowatt-hours (kWh).
Vinh Tan 4 is one of four power plants planned for developedment within the Vinh Tan Power Complex (6,224MW), which is located in the Vinh Tan Commune in the Tuy Phong District of Binh Thuan.
The Vinh Tan power complex is set to become the biggest power complex in the country, generating and supplying adequate electricity for the South Central region and Southern provinces.
The plant was originally designed to have a capacity of 1,200MW (2 x 600MW) and estimated to cost VND36.72t ($1.62bn).
An expansion of the plant was announced in October 2015 in order to add a new 600MW at a cost of approximately VND24t ($1.1bn).
The ground-breaking ceremony for the Vinh Tan 4 power plant took place in March 2014.
The first unit is expected to start commercial operations in December 2017, followed by the second unit in June 2018 and the third in April 2019.
Vinh Tan 4 thermal power plant make-up
Vinh Tan 4 power plant will combine conventional condensing technology with super-critical parameters to fire bituminous / sub-bituminous coal procured from Indonesia and Australia.
It will comprise an ultra super-critical, single reheated boiler, which will have a steam output of 1,755tph.
The boiler will operate at superheat pressure of 25.75bar and a temperature of 568.9°C.
Vinh Tan 4 will also include a Toshiba steam turbine generator, which can generate steam at a pressure of more than 240bar.
The introduction of super-critical technology will enable the plant to generate electricity in a more efficient and eco-friendly manner.
The plant will also be equipped with advanced technologies for reducing environmental pollution and NOx and SOx removal, as well as wastewater treatment to meet both Vietnamese and international criteria for environmental protection initiatives.
Vinh Tan 4 extension project details
The 600MW coal-fired extension project was announced as a part of Vietnam’s Power Development Master Plan VII and features among the most urgent investment projects planned for development between 2013 and 2020.
It will be located adjacent to the other two units and consist of one boiler, one steam generator and one turbine unit.
The extension will use conventional steam, thermal power and super-critical steam to generate power.
Power generation and transmission details
Vinh Tan 4 plant will mix coal with fuel and air in a boiler to generate high-pressure steam, which will be transported to the steam drum where it will be overheated and forwarded to the high-pressure turbine.
The steam current will then be dilated to generate the forces required to rotate the turbine.
Residual heat from the high-pressure turbine will be sent back to the boiler for overheating, before transporting to the medium-pressure turbine.
Steam from the medium-pressure turbine will be dilated and forwarded to the low-pressure turbine.
The dilated steam and generating forces turn the turbine wings, which in turn will start the electric generator and produce electricity to be sent to the power grid.
Power generated by the Vinh Tan 4 thermal power plant will be transmitted to the Vinh Tan substation via a 1,293m-long, 500kV double-circuit transmission line.
The main transformer of the first unit of Vinh Tan 4 thermal power plant was successfully energised on 12 July 2016, while the second unit was connected to the national power system in December 2016.
Coal handling at Vinh Tan 4 thermal power project
Vinh Tan 4 plant will use approximately 2.8Mt of coal, which will be imported by 100,000dwt ships to the coal jetty.
The coal will be unloaded and transported to the coal yard by conveyor belts, before being delivered to the bunker bay in the main station building via a bucket wheel stacker / reclaimer.
Funding for the Vietnamese thermal power project
The Korean Eximbank (KEXIM), the Korea Trade Insurance Corporation (K-Sure), the Japan Bank for International Cooperation (JBIC) and the Nippon Export and Investment Insurance (NEXI) are jointly funding 85% of the $1.36bn engineering, procurement and construction (EPC) contract for the Vinh Tan 4 power plant.
JBIC granted a loan of $202.9m for the thermal power plant, while the Bank of Tokyo-Mitsubishi (BTMU) granted $136m.
JBIC and the BTMU provided funds to EVN for purchasing the main equipment from Mitsubishi and Toshiba for the project.
A consortium comprising Doosan Heavy Industries & Construction, Mitsubishi Corporation, Pacific Corporation, and Power Engineering Consulting Joint Stock Company 2 was awarded the $1.36bn EPC contract for the power plant in December 2013.
The same consortium also won the EPC contract for the Vinh Tan 4 extension project in March 2016.
Mitsubishi is supplying the steam turbine and generator as part of the EPC contract, and Doosan is responsible for the project’s boiler supply and site development.
Power Engineering Consulting Joint Stock Company 3 (EVNPECC3) is acting as the owner’s engineer, while Toshiba Corporation is supplying the steam turbines and generators.
Construction Corporation No.1 (civil work and structural steel erection works), VINAINCON (plumbing work and CBB building), PECC2 and Pacific (ancillary equipment), ABB (Symphony Plus plant automation system) and Lilama10 Joint Stock Company are also involved in the project.
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