Energy demand in China is slowing. This is causing a major headache for the hydropower sector, which has invested heavily in new projects in recent years. The continued construction of hydropower, as with coal, has led to surplus capacity, tumbling profits and an unbalanced national energy system.
Rather than address this problem, the government’s new 13th Five-Year Plan for the energy sector, may actually make it worse. The plan proposes to halt the construction of small- and medium-sized hydropower plants while adding new mega hydropower projects in the country’s western provinces.
It hopes to solve overcapacity by transmitting more electricity from the west to the energy-hungry cities of the east. But experts say this will be difficult to achieve in practice.
Cutting back on small hydro
The southwest provinces of Yunnan and Sichuan have particularly rich hydropower resources because they are located where several of Asia’s major rivers flow. The Jinsha, which becomes the Yangtze further downstream, flows through Sichuan. In Yunnan, two of Indochina’s most important rivers, the Lancang (which becomes the Mekong) and the Nu (the Salween) flow almost parallel through deep mountain gorges.
In July, Yunnan indicated that no more hydropower plants of less than 250 megawatts would be built and that existing ones would not to be expanded. Sichuan followed in October, announcing that until 2020 projects of 50 to 300 megawatts would only be approved if they helped alleviate poverty and energy shortages in remote areas.
The fact that grid operators are unwilling to hook up to smaller plants means that the electricity generated can’t be sold.
Yu Xiaogang, Green Watershed
The decision to curb small-scale hydropower generation in these provinces is motivated by economic concerns. China’s hydro sector is suffering from a glut of capacity nationally, and there is little incentive to connect additional small hydro plants to the grid. Without the means to export power, water that could be channeled into turbines to produce power just flows away.
“By halting [construction] we can make better use of existing capacity,” said Zhang Boting, deputy secretary of the China Society for Hydropower Engineering.
Yu Xiaogang of Yunnan environmental independent organisation Green Watershed told chinadialogue that small-scale hydropower has already reached its peak potential in the province.
“Smaller facilities face specific technical issues. The fact that grid operators are unwilling to hook up to smaller plants means that the electricity generated can’t be sold,” said Yu.
“In the past, [hydropower producers] would make their money back in the first decade, now it generally takes two. [The sector] is much less profitable for incoming investors, nowadays,” he added.
However, smaller plants do have some advantages over larger mega projects; their environmental impact is smaller, and if located appropriately, they can supply power to remote areas in need of energy. The government has acknowledged these factors in its plan, which supports “the use of small-scale hydropower in remote off-grid areas, for poverty-relief and development”.
Caught out by the market
Experts argue the government’s focus on halting small-scale hydropower projects is misplaced and that it will have a limited effect on alleviating the problem of surplus capacity.
China is the world’s largest producer of hydropower, with 80 per cent of potential hydropower resources concentrated in Yunnan, Sichuan and Tibet. Together with Guizhou and Guangxi, these southwestern provinces are where the government is calling for the development of major “hydropower hubs” (areas of rich hydro resource that will be prioritised for the construction of mega hydropower plants).
The 13th Five Year Plan for the hydropower sector names six hubs or areas. These include the upper streams of the Yangtze and Yellow River, Wu River, Yalong River and Dadu River, etc., with a total expected capacity of over 100 gigawatts.
Construction of these hubs has been encouraged in the 13th Five Year Plan that was released early in 2016, the sub plan for energy development approved on November 17, and the National Energy Administration’s guidance for 2016.
The proposals to develop hydropower hubs and increase total hydropower capacity come at a time when China’s economy is slowing down and energy demand is flattening. Existing hydropower projects are already underutilised in provinces such as Sichuan and Yunnan.
Figures from the Sichuan office of the National Energy Administration (NEA) show that 9.7 billion kilowatt hours were wasted in 2014, up from 2.6 billion kilowatt hours in 2013, an increase of almost 400 per cent. If the situation does not improve then wastage in 2020 is projected to be 35 billion kilowatt hours, 8.6 per cent of total hydro production for that year, according to the Sichuan NEA.
The situation in Yunnan is similar. Data from CNEnergy.org, the official site of China Energy News, shows that wasted hydropower capacity in the province is expected to rise ten-fold between 2013 and 2015, reaching more than 10 billion kilowatt hours.
The flood season of 2014 saw sustained daily losses of 330 million kilowatt hours, which cost Yunnan almost 100 million yuan (US$14 million) a day in lost revenues.
The latest figures from the National Energy Administration show growth in energy demand fell from 12 per cent in 2011 to less than 1 per cent in 2015.
The coming five years are expected to see growth in demand of between 3.6 per cent and 4.8 per cent. This is partly a result of ongoing efforts to shed excess capacity in many industries, which represent the bulk of China’s electricity consumption.
But both Yunnan and Sichuan have expanded hydropower at a breakneck pace in recent years. Installed hydropower capacity in Yunnan quadroupled from 9.9 gigawatts in 2009 to 43 gigawatts in 2015.
Since 2010, Sichuan has seen annual increases in hydropower capacity of over 20 per cent. This expansion has coincided with the slump in electricity demand, resulting in wasted capacity.
Fan Xiao, chief engineer of the Sichuan Geology and Mineral Bureau Regional Geological Survey Team, told chinadialogue that because the construction of hydropower plants is a lengthy process it is not possible to react quickly to shifts in demand. This means that projects started during a time of economic growth are coming online even though new electricity supply is outstripping demand.
Solving the problem
Despite the lack of demand for new hydropower, the 13th Five-Year Plan still includes plenty of large-scale hydropower projects.
Fan offers two reasons for this: first, local governments hope the projects will boost the local economy and increase tax receipts. Second, the projects are usually built by large state-owned firms that have deep pockets and strong lobbying power. Major hydropower projects are needed to keep their operations going.
In an effort to tackle the wastage problem, the new plans propose linking hydropower hubs to Guangdong and southeast China, to provide consumer markets for the electricity.
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