Renewable energy in Vietnam

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Vietnam exploits all four big sources of renewable energy: hydroelectricity, wind power, solar power and biomass. The potential for hydroelectricity is well developed. By the end of 2018, hydropower was the largest source of renewable energy, contributing about 40% to the total national electricity capacity.[1] Excluding medium and large-sized hydropower plants, other renewable energy sources accounted for 2.1% of the total capacity of the whole system.,[1] but that number is increasing fast. While only two utility-scale solar PV plants were operating at the end of 2018, a Feed-in Tariff policy deadline led eighty new plants to be connected by mid 2019. Solar power generation capacity, over 4460MW, represents now more than 8% of total generation system capacity. While by the end of 2018 the total installed wind power capacity in Vietnam reached about 228 MW, the number of projects under construction imply that this number will more than double in 2019. The commercial biomass electricity generation is currently slow and limited to valorizing bagasse only. Still its prospects are positive because the stream of forest products, agricultural and municipal waste in increasing, and the government is studying a Renewable Portfolio Standard that could promote this energy source.

Hydropower[edit]

Hoa Binh Dam - Vietnam

Vietnam can exploit hydropower capacity of about 25,000 - 38,000 MW, in which 60% concentrated in the North, 27% in the Central and 13% in the South.[2][3] Large hydropower projects with a capacity of over 100MW are almost fully exploited.[2] Therefore, Vietnam focuses on developing small hydropower potential.

For the potential to develop small hydropower plants, the country has over 1,000 identified locations, ranging from 100 kW to 30 MW, with total capacity over 7,000 MW. These locations are concentrated mainly in the northern mountains, the South Central Coast and the Central Highlands.[4]

In 2015, the total small hydropower capacity was about 2,300 MW.[5] By the end of 2018, the whole country had 818 hydropower projects with a total installed capacity of 23,182 MW [6] and 285 small hydropower plants with a total capacity of about 3,322 MW.[7]

According to the Revised National Power Development Master Plan for the 2011-2020 Period with the Vision to 2030 [8] (also called PDP 7A/ PDP 7 revised):

  • "Total capacity of hydropower sources (including small and medium hydroelectricity, pumped-storage hydropower) is about 21,600 MW by 2020, about 24,600 MW by 2025 ( pumped-storage hydropower is 1,200 MW) and about 27,800 MW by 2030 ( pumped-storage hydropower is 2,400 MW). Electricity production from hydropower sources accounts for about 29.5% in 2020, about 20.5% in 2025 and about 15.5% in 2030."
  • "By 2020, the total capacity of power plants will be about 60,000 MW, of which large and medium hydroelectricity and pumped-storage hydropower will be about 30.1%. By 2025, the total capacity will be about 96,500 MW and 49.3% of which will belong to hydropower. By 2030, hydroelectricity will account for 16.9% of the 129,500 MW of total capacity."

Since 1975, Vietnam has developed several typical hydropower projects, including: Son La Hydropower (2400 MW), Lai Chau Hydropower (1200 MW) and Thuy Huoi Quang electricity (560 MW) [4].... For more information about hydropower plants in Vietnam, see List of power stations in Vietnam (Hydroelectric section).

In October 2018, the Ministry of Industry and Trade and the provincial People's Committees cancelled 474 hydropower projects and 213 potential sites, recognizing that their impact on the environment and society failed to meet the expected benefits in terms of flood control, irrigation and power generation.[9] The majority of these removed projects were located in the mountainous and midland provinces of the North, Central Highlands and Central Coastal provinces, and implemented by private enterprises.[10]

The decision to cancel about half of the projects pipeline was motivated by a series of incident with small and medium hydropower, especially in the rainy seasons.[11] It is a sign that the incentive mechanisms and policies for hydropower have been too efficient at attracting developers. They did not have the build-in barriers to filter out projects with unacceptable risks. The negative outcomes of hydropower development in Vietnam include:

  • Livelihood disruption and loss of forests. Building 25 large hydropower projects in the Central Highlands used over than 68,000 hectares of land, affecting nearly 26,000 households.[12] For example, the 7.5 MW Dak Ru hydropower plant, which was put into operation in April 2008 in the Central Highlands, destroyed hundreds of hectares of forest along Dak Ru stream, upsetting the landscape along more than 5 km.
  • Dam failure. The Ia Kre 2 hydropower project (5.5MW capacity) in Gia Lai was withdrawn on August 8, 2018 after two dam failures in 2013 and 2014. Estimates of damage after two dam failures totaled about 7 billion VND. Also, the second dam failure caused damage to 26 huts and 60 hectare of crops of people who live there.[13]
  • Unexpected accidental water discharge. On August 8, 2018, flood discharge of Dong Nai 5 hydropower project happened and the trouble of the discharge valve at Dak Ka hydropower has flooded nearly 1,600 ha of agricultural land, washed away 99 fish rafts of 14 households raising fish on Dong Nai river.[14] On May 23, 2019, Nam Non hydropower unexpectedly discharged water and did not pull the warning whistle as prescribed caused 1 person death.[15]
  • Perturbation in the downstream water availability and sediment transport. For example, in November 2018, the Lao Cai Provincial People's Committee approved the request to register the two projects on the Red River into its Small and Medium Hydropower Plan: Thai Nien (60 MW) and Bao Ha (40 MW). Downstream provinces along Red River, which include the capital city Hanoi, voiced concerns against the proposed projects.[16]
  • Changes in the flood regime. According to the inspection team of Nghe An province, the construction of many hydropower projects in the Ca river basin has greatly changed the river flow, the water recedes more slowly in the flood season, and the flooding period is longer. In December 2018, Nghe An Provincial People's Committee removed 16 hydropower projects from planning and reviewed 1 project.[17]
  • Hydropower reservoirs stimulate small intensity earthquakes. From January 2017 to the beginning of August 2018, there were 69 earthquakes with intensity of 2.5 - 3.9 on the Richter scale in the Quang Nam province. Among them, 63 earthquakes occurred in Nam Tra My and Bac Tra My districts, where the Song Tranh 2 hydropower plant was operating and 6 occurred in Phuoc Son district, near the Dak Mi 3 and Dak Mi 4 hydropower facilities.[18] The series of earthquakes near the Song Tranh 2 hydropower plant caused many houses and construction works in Bac Tra My district to crack, causing local people worries about their safety. The press releases of the National Council for Construction Works confirming that the Song Tranh 2 hydroelectric dam had passed strict quality testing did not effectively diminish the anxiety of the people. Damages to houses and public buildings were estimated to 3.7 billion VND. Damages to the provincial road is estimated to about VND 20 billion.[19]

Wind energy[edit]

Wind Speed Potential in Vietnam. For more detail, visit: https://globalwindatlas.info/downloads/Vietnam

Vietnam wind resource mostly lies along its coastline of more than 3,000 km, and in the hills and highlands of the northern and central regions (see the map).[20] A World Bank ESMAP study (see the table below)[21] estimated that over 39% of Vietnam's area had annual average wind speed over 6 m/s at a height of 65m, equivalent to a total capacity of 512 GW. It estimated that over 8% of Vietnam's land area had annual average wind speed over 7 m/s, equivalent to a total capacity of 110 GW.[22]

Table 1: Vietnam's onshore wind potential at 65m height: [22]

Average wind speed Lower

< 6 m/s

Medium

6–7 m/s

Pretty high

7–8 m/s

High

8–9 m/s

Very high

> 9 m/s

Area (km2) 197,242 100,367 25,679 2,178 111
Area ratio (%) 60.6 30.8 7.9 0.7 >0
Potential capacity (MW) - 401,444 102,716 8,748 482

A comparative study[23] assessed that Vietnam has 8.6% of its land area with "good" to "very good" potential for large wind power stations, while Cambodia has 0.2%, Laos has 2.9%, and Thailand has only 0.2%.[23] The offshore wind potential is also very important in Vietnam.

Vietnam's first high-capacity wind farm, with 30 MW, was inaugurated by the Vietnam Renewable Energy Joint Stock Company (REVN), in the central province of Binh Thuan on April 18. The next two projects—the Phú Quý island hybrid grid with 6 MW and the near-shore Bac Lieu phase 1 with 16 MW—both completed in 2013. No new capacity was added in 2014 or 2015. Provincial wind power development plans for eight provinces: Bac Lieu, Ben Tre, Binh Thuan, Ca Mau, Ninh Thuan, Quang Tri, Soc Trang and Tra Vinh were published in 2016. That year the 24 MW Phu Lac project in Binh Thuan province and the 83 MW Bac Lieu phase 2 were completed. The following year, the 30 MW Hướng Linh 2 project in the Quang Tri province was connected. By the end of 2018, the total installed wind power capacity in Vietnam reached about 228 MW. The Trung Nam project in Ninh Thuan province inaugurated in April 2019 is a hybrid facility, co-locating a 40MW wind farm (to be extended by 112 MW in phase 2) with a 204 MW solar PV plant.[24]

The wind power industry is taking off in 2019 in Vietnam, although not as spectacularly as the solar power industry. By the end of May 31, 2019, 7 wind power plants were in operation, for a national installed capacity of 331 MW.[25]

The power development masterplan PDP 7 revised,[8] published in 2016, stated that Vietnam would aim to have 800 MW of wind power capacity by 2020, 2,000 MW by 2025 and 6,000 MW by 2030.[22] By mid 2019, the number of projects under construction was in line to reach the 2020 target, and the number of projects at the "approved" stage was twice what is needed to meet the 2025 target.

Bac Lieu wind power farm

The image shows the Bac Lieu wind farm, a 99 MW project that demonstrated the economic and technical feasibility of large scale wind power in VietnamHong Thai Vo.; Viet Trung Le; Thi Thu Hang Cao (2019). "Offshore Wind Power in Vietnam: Lessons Learnt from Phu Quy and Bac Lieu Wind Farms". Acta Scientific Agriculture 3.2. 1st Vietnam Symposium on Advances in Offshore Engineering. pp. 26–29.. This is the first project in Asia located on intertidal mudflats. As a first of a kind project, it benefited from a feed-in tariff of 9.8 cents/kWh and preferential financial terms from the US-EXIM bank. While the construction was more complex than an onshore project, it is more accessible than an offshore project, and it captures the benefits of the excellent wind regime without impacting the land used for aquaculture or salt production. According to the project's CDM

In April 2019, the Trung Nam renewable energy complex was inaugurated. Built in the Ninh Thuan province, it co-locates a wind farm (total investment capital of 4,000 billion VND) and a solar PV power farm (204 MW, total investment capital of 6,000 billion VND). Phase 1 of the wind power plant is operational with a capacity of 39.95 MW. By the fourth quarter of 2019, the second phase of the project will have an additional capacity of 64 MW. Phase 3 will be completed in 2020 with a capacity of 48 MW.[26] The project was completed in time to benefit from an incitative the feed-in tariff for renewable energy offered by the government. Many other projects were completed in that time window, in excess of the capacity of the transmission network, leading to severe curtailment problems starting in July 2019.

The Thang Long Wind power project proposes to develop large-scale offshore near the Kê Gà area, in the Binh Thuan province. The first phase of the project, for 600 MW, targets to start operating at the end of 2022.[27] The vision is for a total system capacity of about 3,400 MW, at a total investment of nearly US$12 billion, not including investment for connection to the national electricity system.

Solar energy[edit]

Photovoltaic Power Potential Vietnam. For more detail, visit:https://globalsolaratlas.info/downloads/vietnam

Vietnam has a great potential to develop solar power, especially in the Central and the South.

The[N 1] average number of sunshine hours in the North ranges from 1,500-1,700 hours of sunshine per year. Meanwhile, the Central and Southern regions have higher average annual sunshine hours, from 2,000-2,600 hours/year.[29]

The average daily solar radiation intensity in the north is 3.69 kWh/m2 and the south is 5.9 kWh/m2. The amount of solar radiation depends on the amount of cloud and the atmosphere of each locality. From one region to another, there is significant variation in solar radiation. Radiation intensity in the South is often higher than in the North.[30]

Table 2 : Solar radiation in Vietnam: [30]

Region Average number of sunshine hours Solar radiation intensity

(kWh/m2/day)

Evaluate
Northeast 1,600 – 1,750 3.3 – 4.1 Medium
Northwest 1,750 – 1,800 4.1 – 4.9 Medium
North Central 1,700 – 2,000 4.6 – 5.2 Good
Central Highlands and South Central 2,000 – 2,600 4.9 – 5.7 Very good
Southern 2,200 – 2,500 4.3 – 4.9 Very good
Average country 1,700 – 2,500 4.6 Good

In the first half of 2018, the Ministry of Industry and Trade (MOIT) recorded 272 solar power plant projects with a total capacity of about 17,500 MW, 9 times higher than Hoa Binh hydropower plants and 7 times more than Son La hydropower plant.[31] By the end of 2018, there were about 10,000 MW registered, of which 8100 MW was added to the plan, more than 100 projects signed Power Purchase Agreements, 2 projects came into operation with a total capacity of about 86 MW.[7]

By the end of June 30, 2019, 82 solar power plants, with a total capacity of about 4,464 MW, have been successfully checked the conditions and successfully commissioned by the National Load Dispatch Centre (A0).[32] These projects were entitled to an electricity purchase price (FIT) equivalent to 9.35 US¢/kWh, for a period of 20 years under Decision 11/2017/QD-TTg [33] of the Prime Minister. At that time, solar power has accounted for 8.28% of the installed capacity of Vietnam's electricity system. From now until the end of 2019, A0 is expected to continue to operate and put into operation 13 more solar power plants, with a total capacity of 630 MW, bringing the total number of solar power plants in the whole system to 95 plants.[32]

Intel Solar Installation Vietnam

According to PDP 7A,[8] solar power planning is only 850 MW (by 2020), about 4,000 MW in 2025 and about 12,000 MW by 2030. Electricity production from solar power accounts for about 0.5% in 2020, around 1.6% by 2025 and about 3.3% by 2030.

A few large-scale solar power projects have been built in Vietnam:

  • In April 2019, 3 clusters of solar power plants of BIM Group (capacity of 330 MWP) in Ninh Thuan completed commission electricity to the national grid system, including BIM 1 power plant with capacity of 30 Mwp; BIM 2 with capacity of 250 Mwp and BIM 3 with capacity of 50 Mwp. The cluster of 3 solar power plants was invested more than 7,000 billion VND, installing more than 1 million solar panels.[34]
  • On November 4, 2018, after 9 months of construction, TTC Krong Pa solar power plant with a capacity of 49 MW (69 MWp), the total investment of more than VND 1,400 billion, built in Gia Lai province, has commissioned successfully.[35]
  • On September 25, 2018, Phong Dien Solar Power Plant in Thua Thien Hue province completed commission electricity to the national grid system. This is the first 35 MW solar power plant to be commissioned in Vietnam. It is expected that by 2019, this factory will expand more with the capacity of 29.5 MW with an area of 38.5 hectares, meeting a part of the demand for electricity consumption in the future.[36]

For more information about solar power plants in Vietnam, see List of solar power plants in Vietnam.

Tra O lagoon solar power plant project (My Loi commune, Phu My district, Binh Dinh province), with a capacity of 50MWp, deploy on a water surface area of around 60 hectares, a very small part of the total area of 1,300 hectares of Tra Lo lagoon water surface, is expected in quarter II 2019 will go into operation.[37] However, from mid-2018, during the implementation process, there was fierce opposition from the local people, preventing investors from building projects due to some big concerns about affecting the ecological environment causing death of fish and shrimp under the lagoon (because this is the main income source for the communes surrounding the lagoon) and the water source pollution problem.[38]

Hacom Solar solar power plant project (Phuoc Minh commune, Thuan Nam district, Ninh Thuan province), 50 MWp capacity, was started in April 2019. However, when constructing the factory, the investor (Hacom Solar Energy Co., Ltd) arbitrarily let the vehicles run through people's land. Local people stopped container trucks from transporting materials into the project and complained that the local authorities and the owner of the solar power plant had to meet with land-owners to negotiate compensation plans for the people because the project has violated people's land.[39]

Biomass energy[edit]

As an agricultural country, Vietnam has great potential for biomass energy. The main types of biomass are: energy wood, waste (crop residues), livestock waste, municipal waste and other organic wastes. The biomass energy source can be used by burning directly, or forming a biomass fuel.[4]

Since the Prime Minister issued Decision 24/2014/QD-TTg[40] on mechanisms to support the development of biomass power projects in Vietnam, many agricultural by-products has become an important source of materials, reused to create a large energy source. As in the sugarcane industry, the potential of biomass energy from bagasse is quite large. If utilizing and exploiting bagasse sources thoroughly and effectively, it will contribute considerable electricity output, contributing to ensuring national energy security.[41]

By November 2018, there were 38 sugar factories in Vietnam using biomass to produce electricity and heat with a total capacity of about 352 MW. Among them, there were only 4 power plants on the grid with a total capacity of 82.51 MW (22.4%), selling 15% of the electricity generated from biomass to the grid at a price of 5.8 US¢/kWh.[42]

Until the end of 2018, 10 more biomass power plants with a total capacity of 212 MW were put into operation.[7]

The PDP 7A[8] specifies for the development of biomass power: Co-generation in sugar mills, food processing plants, food plants; implement co-firing biomass fuel with coal at coal power plants; electricity generation from solid waste, etc. The proportion of electricity produced from biomass energy sources reaches about 1% by 2020, about 1.2% by 2025 and about 2.1% by 2030.

Some examples of biomass power plants using bagasse:

  • On April 2, 2017, KCP Industry Company Limited officially commissioned phase 1 (30MW) of KCP-Phu Yen biomass power plant with a total capacity of 60MW at an investment cost nearly 1,300 billion VND.[43]
  • On 4 January 2019, Tuyen Quang Bagasse Biomass Power Plant was officially integrated into the national grid. The plant with a capacity of 25MW has been operating stably, producing 2 million KW, of which 1 million 200 KW has been put into the National Grid, the rest is used for sugar production of the unit.[44]

Solid waste energy (Waste-to-Energy)[edit]

On average, nearly 35,000 tons of urban domestic solid waste and 34,000 tons of rural domestic solid waste are released every day. In big cities like Hanoi and Ho Chi Minh City, there are 7-8,000 tons of waste per day. The amount of garbage is being wasted due to not being fully utilized for energy production.[45]

As of early 2019, Vietnam had 9.03 MW of waste-to-energy (WtE) electricity. In particular, Go Cat power plant, with a capacity of 2.43 MW, Can Tho power generation solid waste treatment plant with a capacity of 6 MW and an industrial waste treatment plant generating electricity at Nam Son garbage disposal area has a capacity of 0.6 MW.[46]

On February 18, 2019, Hau Giang WtE power plant project (Hau Giang province) with a capacity of 12 MW, of which phase 1 (6 MW capacity) will be put into operation in 2019 and phase 2 (6 MW capacity) will be run in 2024. This plant is connected to the national electricity system by 22 kV voltage. Phu Tho waste WtE power plant project (Phu Tho province) has a capacity of 18 MW, of which phase 1 (9 MW capacity) will be put into operation in 2020, phase 2 with the capacity of 9 MW will be commissioned in the year 2026. This plant is connected to the national electricity system by 110 kV voltage.[46]

According to the Decision 2068/QD-TTg [47] on Approving the Viet Nam's Renewable Energy Development Strategy up to 2030 with an outlook to 2050:

  • The rate of urban solid waste for energy targets is expected to increase up to 30% by 2020, and approximately 70% by 2030. Most urban solid waste will be used for energy production by 2050.

Geothermal energy[edit]

Vietnam has more than 250 hot water points widely distributed across the country, including 43 hot spots (> 61 degrees), the highest point of exit with 100 degrees is located in Le Thuy (Quang Binh).[48] Of the total 164 sources of geothermal in the northern midlands and mountains of Vietnam, up to 18 sources with surface temperatures > 53 degrees can allow the application of power generation purposes.[49] The geothermal potential throughout the territory of Vietnam is estimated at about 300 MW.[4]

Tidal energy[edit]

In Vietnam, the tidal energy potential is not large, can only reach 4GW capacity in the coastal areas of the Mekong Delta. However, the large potential area that has not been studied is the coastal waters of Quang Ninh - Hai Phong, especially Ha Long Bay and Bai Tu Long, where the tidal range is high (> 4m) and many islands do dikes for water tanks in coastal lakes and bays.[50]

Another report called "Renewable energy on the sea and development orientation in Vietnam"[51] raised the potential of tidal energy: Concentrated in the northern part of the Gulf of Tonkin and the Southeast coastal estuaries. Potential theoretical calculations show that tidal power can reach 10 GW.

Renewable energy support policies[edit]

To encourage renewable energy development, the Government has set a price to buy electricity from renewable energy projects (Feed-in tariff-FIT price). Below is a summary of the current support mechanisms for renewable energy types:

Table 3: Summary of current price support mechanisms for renewable energy types: [4]

RE type Technology Price type Electricity price
Small hydroelectricy Power generation Avoided cost is published annually 598-663 VND/kWh (by time, region, season)

302-320 VND/kWh (excess electricity compared to the contract)

2158 VND/kW (capacity price)

Wind power Power generation FIT price 20 years 8.5 US¢/kWh (on shore) and 9.8 US¢/kWh (off shore)
Solar power Power generation FIT price 20 years 9.35 US¢/kWh, before 30/6/2019 for projects that achieve COD - commercial operation date. New FIT has been proposed and discussed
Biomass energy Cogeneration

Power generation

Avoided cost is published annually 5.8 US¢/kWh (for cogeneration)

7.5551 US¢/kWh (North)

7.3458 US¢/kWh (Central)

7.4846 US¢/kWh (South)

Waste to energy Direct burning

Burning of gases from landfills

FIT price 20 years

FIT price 20 years

10.5 US¢/kWh

7.28 US¢/kWh

See also[edit]

Notes[edit]

  1. ^ Statistics on average hours of sunshine in regions of Vietnam are taken from the General Statistics Office and the Journal article[28]

References[edit]

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