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Code:002389   Name:NanYang Tech

Vigorously develop new energy to speed up the construction of UHV power grid

Source:亮报 Date:Apr 27,2015

 

With the release of national approval authority and the introduction of support policies, new energy ushered in a new round of rapid development period. China's clean energy and abundant resources, water can develop resources of 600 million kilowatts, has developed nearly 50%, of which the most abundant water resources in the southwest, accounting for more than half of the country, has not yet developed the amount of non-development of more than 70% Mainly in the "five rivers and one river" (Jinsha River, Yalong River, Lancang River, Nujiang, Brahmaputra, Dadu River); land wind energy, solar energy development resources were 2.4 billion, 5 billion kilowatts, currently only developed 4% and 0.5 %. Since the new century, wind power, solar power installed capacity increased by 281 times and 1395 times, respectively, an average annual increase of 50% and 68%. The end of 2014, China's wind power, solar power installed capacity reached 95.81 million kilowatts and 26.52 million kilowatts, respectively, ranked first in the world and the second. But to achieve rapid and healthy development of new energy, but also must strengthen the national unified planning guidance and constraints, so as to promote the coordinated development of power grid.

It is of great significance to protect the energy supply, optimize the energy structure, manage the environmental pollution and build the ecological civilization. It is also an important requirement for the sustainable development of China's economy and society. However, the new energy volatility, load gradient, in order to adapt to their access to the grid, there will be "abandoned water, abandoned wind, abandoned light" and other issues. In Germany, for example, from 2009 to the present five years, the German installed capacity of photovoltaic power from less than 100,000 kilowatts to 37 million kilowatts. Germany is in the same time zone, the East and West time difference is only 30 minutes. Germany currently has millions of photovoltaic power plants, noon peak, the photovoltaic power output will reach the peak at the same time, if necessary, only "abandoned light" to protect the power grid security. China's more than 70% of the clean energy concentrated in the west, the northern region, the local hard to completely absorb, and from the eastern part of the load center is generally more than 1000 km, large-scale development will face a prominent "abandoned water, abandoned wind, abandoned light" , Only relying on UHV power grid, the hydropower, wind power, solar power and other seasonal, random, intermittent power capacity in the total load of the power grid in the acceptable range of control, can effectively protect the clean energy Satisfied, fundamentally solve the "abandoned water, abandoned the wind, abandoned light" problem.

China's long-term use of coal and electricity in place to balance the energy allocation, the eastern central region fog pollution is increasing, the environment overwhelmed, has been difficult to sustain To achieve clean development, to solve the problem of haze, the fundamental way is to develop UHV power grid, to promote the generation of electricity to coal, to replace the oil, electricity from afar, to clean electricity, to achieve our energy from fossil energy to Clean energy-based change, fundamentally solve the problem of air pollution.

The UHV power grid consists of 1000 kV and above AC backbone and ± 800 kV and above DC transmission lines. It has the advantages of far distance, large capacity, high efficiency, low loss, small footprint, high safety, Green low carbon and other comprehensive advantages, is the world's most advanced transmission technology, but also one of our few, the world's leading, with completely independent intellectual property rights of major innovations. Accelerate the development of UHV power grid, is the only way to change the way of energy development, to ensure energy security, optimize energy allocation, build ecological civilization, and serve economic and social development.

More than 80% of the coal, water, wind and solar energy resources are distributed in the western and northern regions. More than 70% of the electricity consumption is concentrated in the eastern and central regions. The energy base is 1000 ~ 4000 km from the load center. The 18th National Congress of the Communist Party of China put forward the goal of "two hundred years", and the economic and social development promoted the rigid growth of energy demand. It is expected that China's power generation capacity will exceed 20 billion and 4 billion kilowatts in 2050, respectively, and the total electricity consumption will reach 8.4 trillion, 15.3 trillion degrees. This energy endowment characteristics and development objectives and requirements, decided to West to East, North Power supply, cross-regional, long-distance transmission, in the country to optimize the allocation of energy resources will be the basic pattern of China's energy development.

The voltage level is improved, the network scale is the general law of grid development. At present, China's eastern and central load center 500 kV power grid has been faced with short-circuit current exceeded, the development of adaptability is not strong, the transmission capacity is not enough, corridor resource scarcity and other prominent issues, UHV development and facing the "strong tonic" transition period structural Contradictions, a serious threat to grid security. If you do not speed up the development of UHV power grid, built "strong cross" strong grid structure, fundamentally solve these problems, but simply expand the size of 500 kV power grid, grid security risks will become increasingly large, but also cause duplication And investment waste.

UHV power grid construction investment scale, industrial chain long, strong economic drive. By 2020, the State Grid Corporation of the cumulative planning investment of about 90.4 billion yuan, built the national grid UHV exchange backbone and 19 back to the UHV DC project. Plus 750 kilovolt and below supporting a total of about 2.5 trillion yuan investment in power grids, power supply and related industries to invest about 3 trillion yuan per year to stimulate GDP growth of 0.8 percentage points or more, while helping to digest steel, cement and other excess capacity, Increase employment, and promote the coordinated development of regional economy.

UHV is China's energy field of independent innovation, with international standards and significant competitive advantage of major technology, and high-speed rail, manned space, is the national innovation and comprehensive strength of the important signs, UHV equipment has become China's equipment manufacturing industry Of the "golden business card". Based on China's ultra-high voltage technology innovation breakthrough, Brazil, Russia, India, Europe and Africa and other countries are actively developing UHV, Europe and the United States is carrying out a new round of large-scale power grid construction and transformation, the market prospect is broad. The development of UHV and the promotion of interconnection of power grids will greatly enhance the influence and competitiveness of "Made in China" in the world, and drive China's electrical equipment manufacturing enterprises to go out and revitalize the national industry.

In 2014, including the "four cross four straight" special high voltage engineering, including 12 West to East power transmission channel has been included in the air pollution control action plan. But with the increase in demand for electricity and load density, the urgent need to speed up the follow-up UHV AC engineering construction, and as a national energy development strategic focus, written in the 2015 government work report, at the same time into the national "three five" energy Planning, so as to solve the energy needs of China's development, and UHV as the focus of economic diplomacy, driven by China's electrical equipment manufacturing enterprises to go out to revitalize the national industry.

TypeInfo: Industry

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