Wind power grid connection has always been a problem. On the one hand, the development of wind power companies is in full swing. There is no use for wind power in the tens of billions of kWh. On the other hand, the enthusiasm of the power grid for dissipating wind power is not high.
Recently, statistics released by the Wind Energy Professional Committee of the Chinese Renewable Energy Society stated that about 10 billion kilowatt-hours of wind power was restricted in the country in 2011, creating the highest historical value.
In recent years, China's wind power industry has developed rapidly. Wind power companies have actively rallied around and various wind power projects have been launched. However, due to the grid's inability to accept wind power and other issues, wind power development has had to slow down.
Wind farm is seriously damaged
The biggest reason is that it is disgusted by the power grid
After years of development, China has grown into the world's largest wind power installation country in 2010. However, due to the fact that the wind power grid connection problem has not been completely resolved, China has not been able to become the largest wind power utilization country.
According to statistics from the China Renewable Energy Industry Association, due to grid construction failures, many wind farms are experiencing “serious electricity†and cause a lot of energy waste. In 2011, about 10 billion kilowatt-hours of wind power was disposed of in the country last year.
According to the prospective industry research institute, in 2011, the wind-wind cancellation in some provinces and cities in China reached about 20%. In the “Three Northsâ€, some areas with abundant wind resources in the northeast, north, and northwest regions exceeded 30%, and direct economic losses amounted to nearly 10 billion yuan.
Li Ang, director of the Greenpeace Climate and Energy Program, said that such a high proportion of wind curtailment and power curtailment has highlighted the hindrance of grid lagging in the development of wind power in China.
“The grid has an unshirkable responsibility for the waste of this clean, low-carbon energy,†said Liang. The slogan of “Big Wind Power Integration into the Big Grid†proposed by the State Grid Corporation of China in 2010 appears to be still a slogan.
“At present, wind power access is technically not a problem. The reason why 100 billion watts of wind power is abandoned is because of grid dispatch problems and it is unwilling to allow stable thermal power to make way for unstable wind power. Because wind power is volatile, The grid needs to spend energy and financial resources to do a lot of pre-work."
In addition, in addition to the above issues, the rapid development of wind power companies itself is also a major cause of the abandoned wind power.
Although the issue of wind power grid connection has not yet been resolved, it still has not blocked the development of the “big leap forward†of wind power companies.
It is understood that about 30% to 50% of wind power capacity is idle.
In view of this situation, the second batch of wind power project approval plans for the “Twelfth Five-Year Plan†issued by the National Energy Administration recently showed that compared with the scale of approval of the first batch of wind power projects of 28.83 million kilowatts, the second batch of projects to be approved was reduced by 1391 Million kilowatts, a drop of nearly 50%.
At the same time, Li Ang also pointed out that the 10 billion kWh of electricity generated by wind power due to power grid dispatch problems last year was almost equivalent to the coal-fired power consumption of Qinghai Province in 2010, and this 10 billion kWh of wind power can also bring 10 million tons. Carbon dioxide emissions. If the problem of grid-connected wind power dispatch cannot be solved, China's energy-saving and emission reduction efforts will be greatly reduced.
Wind power is difficult to increase profits
Incremental grid management difficulty
In fact, the issue of wind power grid access has always been a major issue that restricts the development of wind power.
Because the instability of wind power has a great impact on the safety operation of the power grid, the state has not introduced relevant economic compensation measures, and the enthusiasm for the grid to absorb wind power into the network is not high.
Both the National Energy Administration and the China Wind Energy Association stated that the problems encountered in the development of wind power in China are long-term problems. Grid access is only one of the three major issues that restrict the development of wind power. The grid access to wind power can not increase profits, but it increases the difficulty of grid management, so it is not positive. The difficulty of power grid management is reflected in the fact that wind power sometimes has no impact on power flow and the time mismatch between wind power generation power curve and load curve.
At the same time, there are conflicts with other power sources. The strong volatility of wind power necessarily requires other power sources, especially coal and electricity, to perform peak shaving. Although coal-fired power has peak-shaving capabilities, reducing power will increase unit coal consumption and reduce the profits of coal-fired power companies. Therefore, neither power generators nor local governments will support it. .
In addition, the construction funds are tight. This is not only related to monetary tightening, but also related to difficulties in the operation of power generation companies.
If the above problems cannot be solved in the short term, the wind power industry will still have no turning point.
It should be noted that the "Renewable Energy Law" and relevant state departments have clearly stipulated that power grid companies must ensure that renewable energy generated by the state plans to generate electricity and use renewable energy to generate electricity online at the prices stipulated by the state.
Liang pointed out that because there is no stipulation as to what kind of punishment will be imposed if there is no purchase, the grid has no incentive to accept wind power. From this perspective, the power grid is guilty of knowing the law. The lack of coordination of the power grid seriously hampers the development of renewable energy. In this case, the country needs to impose a renewable energy quota on the grid.
In addition, the “Renewable Energy Law†and the National Development and Reform Commission’s implementation rules for cost sharing all provide certain compensation for the acquisition of wind power by power grid companies, for example, less than 50 km per kWh, a subsidy of 1 cent, and subsidies of 50 to 100 kilometers. 2 cents and more than 100 kilometers of subsidies for 3 cents, and the part of the grid that builds capacity to accept wind power can enter cost accounting. However, these revenues are insignificant compared to the overall income of the grid companies and are insufficient to encourage grid companies to actively accept wind power.
The government should adopt some incentive measures to guide and encourage enterprises to actively carry out technological research and development, and to increase the renewable energy power received by the grid as soon as possible.
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