Khang Duc team consists of many professionals with expertise covering all phases of wind farm development EPC & BOP. We ensure that deadlines, quality standards and cost calculations are met.
Khang Duc plans, coordinates and supervises the construction phases, including:
- Site Appraisal and Procurement.
- Planning, Permits and Financing.
- Access Roads and Installation of the Foundation.
- Cable installation.
- Wind Turbine Construction.
Process of offshore wind farm construction in Vietnam
Site survey, implementation, design & detailed planning.
1/Delivery pile from factory to fabrication yard for splicing/combination and marking
2/Delivery pile from fabrication yard to site for piling barge
3/Driving pile by flying hammer with guide frame for WTG foundation and Link Bridge
4/Driving pile by piling barge for WTG foundation and Link Bridge
1/Installation clamp and support system
2/Cut-off pile head; Installation rebar and pouring concrete for pile plug
3/Installation rebar, formwork, grouding system, anchor cage and pouring concrete for lift 1
5/Installation rebar, formwork, and pouring concrete for lift 3
6/Girder installation for LB
7/Handrail installation and final completion
Wind Energy Potential Vietnam
In Vietnam, several wind measurement studies are conducted. Vietnam is considered to have the best wind resources in Southeast Asia, especially in the nearshore/offshore and onshore coastal regions in the south of Vietnam. In these areas yearly average windspeeds of 9 to 10 meters per second are measured. Generally, windspeeds are declining further inland.
Renewable energy targets and wind energy
Vietnam is a country with a rapidly growing economy together with an increasing energy and electricity demand. To sustain the growing electricity demand, new power plants are being built, especially coal-fired power plants. Besides fossil fuels, hydro power is also an important part of the electricity supply in Vietnam, accounting for 37,3 percent of the total installed capacity. EVN is the single buyer of electricity and holds a monopoly on transmission and distribution. Renewable energy sources are still a very small share in the total electricity production, but ambitious targets have been set by the government.
Wind farm development onshore and nearshore
A key regulatory instrument for wind power in Vietnam are the Provincial Wind Power Development Plans (PWPDPs). These plans define priority areas for wind power development, for which wind measurement has already been conducted. Specific onshore and nearshore sites are selected, based on windspeed, topography, connection and accessibility to the energy grid, land use and buffer zones between potential areas. A total installed capacity of 2.613 MW in 2020 and 15.717 MW in 2030 are allocated in the PWPDPs. The status of these designated areas are diverse: some are under development, under construction or unknown. Currently, the total installed wind power capacity is 186 MW, which is divided over four grid-connected wind farms with capacities ranging between 6 MW and 100 MW.
Wind farm development offshore
Offshore wind energy development – further off-coast than nearshore wind energy – is not yet occurring in Vietnam. Especially the coastline to the northeast of Ho Chi Minh City is very promising, due to the shallow water (ranging between 1 and 25 meters) within 50 kilometres from the shore and the highest offshore wind speeds of Vietnam.
Countries and companies already active at the Vietnamese wind energy market
Companies from countries that have been active in the Vietnamese wind energy sector for a long period of time such as Germany, Denmark, UK and USA have a better position for involvement in wind energy development than companies from, newcomer, the Netherlands. They can build on existing relationships with governments and relevant parties in the wind sector.
What is EPC?
Engineering, Procurement and Construction (EPC) contracts are the most common form of contract used to undertake construction works by the private sector on large-scale and complex infrastructure projects.
Under an EPC contract, a contractor is obliged to deliver a complete facility to a developer who need only “turn a key” to start operating the facility, hence EPC contracts are sometimes called turnkey construction contracts. In addition to delivering a complete facility, the contractor must deliver that facility for a guaranteed price by a guaranteed date and it must perform to the specified level. Failure to comply with any requirements will usually result in the contractor incurring monetary liabilities.
What is BOP?
BoP stands for Balance of Plants. In the wind farms sector, it means everything but the wind turbines.
Basically there are 3 types of Wind Farm contracts commonly used:
- Supply only. It include WTGs, SCADA, Installation supervision and Commissioning.
- Supply and Installation, including all the items in Supply only plus WTGs transport and cranes for the installation (basically, it adds the assembly of the machine).
- Turnkey (full EPC), including all the above plus civil and electrical works.
The sum of wind farm civil works and electrical works are usually called Balance of Plant (BoP).
About wind farm
A wind farm typically comprises a series of wind turbines, a substation, cabling (to connect the wind turbines and substation to the electricity grid), wind monitoring equipment and temporary and permanent access tracks. The wind turbines used in commercial wind farms are generally large slowly rotating, three bladed machines that typically produce between 1MW and 2MW of output. Each wind turbine is comprised of a rotor, nacelle, tower and footings. The height of a tower varies with the size of the generator but can be as high as 100m. The number of turbines depends on the location and capacity of turbines.The amount of power a wind generator can produce is dependent on the availability and the speed of the wind. The term “capacity factor” is used to describe the actual output of a wind energy facility as the percentage of time it would be operating at maximum power output.
Wind farms need to be located on sites that have strong, steady winds throughout the year, good road access and proximity to the electricity grid. Vietnam is considered to have the best wind resources in Southeast Asia, especially in the nearshore/offshore and onshore coastal regions in the south of Vietnam. In these areas yearly average windspeeds of 9 to 10 meters per second are measured. Generally, windspeeds are declining further inland.
According to The Clean Energy Council, the average price of turbine supply contract fell by up to 20% during 2011. The Clean Energy Council estimated indicative direct cost of the various components of a wind farm, in terms of their percentage contribution to the overall capital cost of the project, are:
- Turbine works – 60-75%.
- Civil and electrical works to the point of connection – 10-25%.
- Grid connection – 5-15%.
- Development and consulting work, including wind speed monitoring – 5-15%.