China's grid-connected wind power reached 52.58 million kilowatts in the eastern part of China will build photovoltaic power generation projects

On August 15, the reporter learned from the State Grid Corporation of China that as of now, China's grid-connected wind power has reached 52.58 million kilowatts. Among them, the national grid has a dispatch area of ​​50.26 million kilowatts, an average annual growth rate of 87% in six years; in 2011, the wind power generation capacity was 70.6 billion kwh, which was an increase of 28.2 times from 2006, and the average annual growth rate was 96%. China has replaced the United States as the world’s largest wind power country, and the national power grid has become the world’s largest and fastest growing wind power grid. The capacity of large power grids to operate large wind power is at the leading level in the world. At the same time, as of June 2012, the grid-connected capacity of the State Grid Corporation of China was 2.51 million kilowatts, an increase of 5.4 times year-on-year. The power generation amounted to 1.53 billion kWh, a year-on-year increase of 5.9 times.

According to the national wind power development plan, the installed capacity of grid-connected wind power in 2015 will be 100 million kilowatts, and 200 million kilowatts in 2020. The grid-connected installed capacity of solar power in 2015 was 21 million kilowatts, and in 2020 it reached 50 million kilowatts. So, how to ensure the integration and absorption of these new energy sources such as wind power? In this regard, Shu Yinzhuo, deputy general manager of the State Grid, pointed out: "The power grid must speed up the construction of large-capacity energy storage technology to break through, and wind turbines should be optimized."

In the past five and a half years, the statistical data of 15 years of development in Europe and the United States show that wind power grid-connected installations in Mengdong, Mengxi, Gansu, and Weibei have exceeded 5 million kilowatts, while the international wind power grid-connected installed capacity exceeds 5 million kilowatts. There are only 9 countries. The total installed capacity of wind power in these four regions accounted for 22%, 21%, 20%, and 26% of the total installed capacity in the local area. The proportion of annual electricity generated by wind power was 40%, 12%, 11%, and 9%, respectively. It is comparable to Denmark, Germany and Spain. At the same time, the proportion of wind power generated by wind power in Mengdong, Mengxi, Gansu, and Weibei is up to 72%, 28%, 26%, and 20%, respectively, indicating that China's large power grid has the world's leading capability in operating large wind power.

Shuyin said: "In five and a half years, China has gone through 15 years of development in the United States and Europe and realized wind power from 2 million kilowatts to 50 million kilowatts." It is understood that in order to protect national and local governments at all levels All wind power projects are connected to the grid in a timely manner. Since 2006, the State Grid has invested 45.8 billion yuan in wind power grid integration projects, built 25,300 kilometers of wind power grid interconnection lines, and built 420 new (expanded) substations.

In addition, the State Grid has also built a real-time monitoring and control network for wind power operation with integrated national, sub-adjusted, and provincially-adjusted systems; a new energy dispatching and monitoring network covering 26 provinces and all 570 wind farms has been completed, and the interconnection between wind farms and the power grid has been realized. Intercommunion; research and application of wind power forecasting technology, research and development of power forecasting system with complete independent intellectual property rights, and establishment of a National Grid Numerical Weather Forecasting Operation Center. At present, the wind power forecasting system has been deployed in 15 provincial dispatching agencies with a forecast accuracy of 85% and reaching the international advanced level.

Formed a series of wind power enterprise standard systems. “China's wind power development is most gratifying. First, China's grid-connected wind power exceeds 50 million kilowatts, and the other is that after years of operation, wind power, power grids and other parties face the standards and technologies of wind power integration. Recognizing that the problems posed by wind power to the power grid and the power grid's support for wind power are shared, a new situation has been formed between wind power and the power grid to promote mutual development, positive interaction and mutual development,” said Shuyin Yin.

In the early stage of China's new energy development, equipment manufacturing standards were lacking, the threshold was low, and the manufacturers had many brands. Most of the fans produced before 2009 had no basic functions such as low-voltage ride-through; in the construction of wind farms, wind turbine manufacturers, developers, and power grid companies all links Lack of communication...

Shuyin Yin further explained: “At the beginning of wind power development, many developers were not aware of the peaks of the power system, it was not clear that the power system should be balanced in real time, nor did it know that the power grid could have accidents and have instantaneous failures.” To strengthen communication and coordination with all sectors of society, To jointly study and solve major problems in the development of new energy sources, the State Grid has organized wind power work conferences for four consecutive years since 2008, and has invited various parties involved in the development of wind power to participate in the process to timely report issues related to the integration of wind power, integration, and consumption, and negotiate. Study and solve measures.

At the same time, under the lagging state and industry standards, the State Grid accelerated the construction of the standard system, studied and formulated a series of standards and specifications, and compiled and revised 28 corporate standards covering key issues such as system access, dispatch operation, and grid detection. The link formed a complete corporate standard system. At the same time, increase technological innovation, accumulatively invested 4 billion yuan, carried out 357 scientific research projects, mastered the advanced new energy power generation and delivery joint regulation technology, and promoted the continuous upgrading of wind turbine manufacturing technology.

State Grid News Spokesman Zhang Zhengling pointed out: "As of now, China has made great progress in wind power planning and design, operation control, dispatch management, technical standards and other aspects, and has a deeper understanding of wind power development patterns and characteristics, wind power From small scale to large scale, standards from scratch, technology from follow-up to leadership, operational control capabilities from weak to strong, China's wind power development has reached a new level.”

The State Grid will build distributed photovoltaic power generation in the central and eastern China and also revealed that since 2009, China's solar power has developed rapidly. As of June 2012, the grid-connected capacity of the State Grid Corporation of China was 2.51 million kilowatts, an increase of 5.4 times year-on-year. The power generation amounted to 1.53 billion kWh, a year-on-year increase of 5.9 times.

At present, the grid-connected solar photovoltaic power generation of the State Grid is divided into two categories: large-scale and decentralized (Golden Sun demonstration project and building photovoltaic integration). Grid-connected large-scale photovoltaic power station capacity accounts for about 85%, mainly concentrated in Qinghai, Ningxia, Gansu, Xinjiang and other provinces, access to 35 kV and above voltage level; Golden Sun demonstration project mainly access 10 kV and below power grid. There are many projects and there are few actual starts. There are 354 grid-connected Golden Sun demonstration projects in the State Grid, and currently 157 grid-connected projects are applied for, accounting for 44%. At the same time, in order to ensure the timely integration of photovoltaic power plants, the State Grid has also researched and formulated a series of standards and specifications such as “Technical Regulations for the Integration of Photovoltaic Power Plants into Power Grids”.

“According to the relevant plans, solar power generation in the future is mainly to build solar power stations in the western and northern regions. The scale of 2015 and 2020 will be 1100 and 23 million kilowatts respectively; the distributed photovoltaic power generation system will be built mainly in the central and eastern regions, and the scale of 2015 and 2020 It is respectively 1000, 27 million kilowatts.” Zhang Zhengling said, “The existing large-scale power grids have been fully utilized to dispose and dissipate the potential of wind power. In order to realize the new energy planning goals such as wind power in China, it is imperative to speed up the construction of a number of cross-regional power grid projects. ”