Shen Ruru: Should deal with the deficiency of wind energy solar energy with system innovation

China Guangwang, Beijing, February 16th According to Voice of the Economy “The World Company”, Shen Peiru, a researcher at the Institute of World Economics and Politics of the Chinese Academy of Social Sciences, brings a famous column: System innovation should be used to deal with the defects of wind energy and solar energy; renewable energy companies Development needs updating ideas.

Shen Yuru: China's energy resources endowment has two major characteristics, one is that ore energy lacks less steam and coal, and second, renewable energy, water, wind, solar straw utilizable volume ranks among the best in the world. The first feature determines that our current energy use is highly dependent on coal. In 2011, it consumed a total of 3.4 billion tons of coal, making China the world’s largest emitter of harmful gases. The second feature shows that China has great potential to adjust its energy use structure, reduce dependence on coal, and reduce emissions of greenhouse gases and other harmful gases.

In December 2011, the Chinese delegation pledged at the United Nations Climate Change Conference in Durban, South Africa, that China is determined to use a combination of means within five years to reduce its annual CO2 emission intensity per unit of GDP by 17% compared to 2010. This will be achieved Apart from improving energy efficiency and adjusting energy-saving measures for the industrial structure, it is necessary to vigorously develop renewable energy sources, especially to develop inexhaustible non-polluting solar energy.

At present, China is the world’s largest producer of wind energy photovoltaic power generation equipment, but it is reported that many large-scale wind power plants built in the northwest of China’s Inner Mongolia are idled, and photovoltaic online is harder than wind power, so that China’s photovoltaic cells can only Rely on the European and American markets to absorb. The reason why the domestic power grid is reluctant to accept wind power and optoelectronics is mainly due to: first, the price of electricity for wind power and opto-electronics is too high for coal; secondly, wind power and photovoltaic are unstable intermittent power supplies. For the sake of power grid security, intermittent energy is used on the power grid. The proportion in China should not exceed 1/10. These two shortcomings do exist, but this is an inertial thinking based on the current state of the art. If our alternative energy producers and our relevant competent authorities can recognize the urgency of the country’s strategic task of reducing emissions, we can overcome If you are accustomed to the energy technology, you will be able to respond to the disadvantages of wind energy and optoelectronics in the spirit of system innovation and you will certainly find ways to make wind power and optoelectronics work in China.

First of all, the price trend of new technology and equipment is decreasing along with the increasing production volume of equipment. At present, the cost per kWh of wind power generation in China is close to thermal power, and it should be believed that with the rise of oil prices and the production of wind power and photovoltaic equipment, With the expansion of scale, the prices of wind power and photovoltaics will soon drop to levels that our country can accept. Secondly, an important reason why China’s power grid resists the large-scale use of wind power and optoelectronics is that neither of them is an intermittent power source capable of stabilizing power generation. This is an old sight to see new things. Coal and oil have very serious flaws, but we are used to seeing no strangers. However, many of the advantages of wind power and solar power have not yet been fully understood. We need to emancipate the mind.

Let's talk about solar power. The intermittent nature of solar power is regular. It is mainly because it does not generate electricity at night, but the electricity consumption rules also use less electricity at night. Therefore, solar power is exactly the whole wind power that compensates for the large amount of electricity during the day, giving him the correct positioning of intermittent It is not a disadvantage. Besides wind power, if there is wind in the peak of electricity consumption, wind power is also a kind of wind power, only when there is no peak in the peak of power consumption is his shortcomings. The current solution is to establish pumped-storage power stations. However, such power stations are prone to huge downstream rises and falls in the river water level, which is not conducive to fisheries and the aviation industry. In fact, it is possible to objectively replace some hydropower stations with wind power stations instead of pumping power stations. The completed hydropower stations generally have only 3-5 months of sealing time per year to generate electricity at full capacity. In other cases, some of the units will be idle due to the shortage of incoming water. Therefore, traditional hydropower stations can change the position of wind power stations 7-9 months per year, that is, from 24-hour power generation to, for example, 12-hour power peaks. When no power is generated, they can be used in the 12 hours of power generation. The amount of water is doubled, and the idle units can be started. This method does not draw back downstream river water, because pumped-storage power stations will build more units in the future, so that they can be adjusted during the Fengshui season. In addition, it is also possible to use low-power electricity and electrolyzed water to produce new energy for power generation at peak hours or for fuel cell vehicles.

To do this, each of these issues contains many sub-problems that we need to solve. Therefore, we need to carry out solid system innovation, and from an old point of view, these are all difficult problems. However, from a development point of view, we will solve these problems and we will solve them. Will have a blue sky new world of energy conservation and emission reduction.