Breaking through the bottleneck of grid connection

Only by breaking through and technical bottlenecks can "infinite scenery"

the first speed accuracy point project of the golden sun demonstration project jointly launched by the Ministry of finance, the Ministry of science and technology, the national energy administration and the national household appliance company, the national scenery storage and transmission demonstration project is about to be fully completed. This is the largest renewable energy project in the world, integrating wind power, photovoltaic power generation, energy storage and transmission projects

the development of new energy faces challenges

in the era of increasing energy demand, changing the mode of energy development, promoting the clean and efficient utilization of traditional energy, and accelerating the development of new and renewable energy has become the keynote of China's future energy development. It is expected that by the end of the 12th five year plan, the proportion of non fossil energy in China's primary energy consumption will reach 11.4%, Among them, wind energy and solar energy are the main force of new energy utilization

China's wind and solar energy resources have great potential and rapid development. It is estimated that by 2020, the installed capacity of wind power will exceed 150million kW, and solar power will reach 20million kW. However, with the rapid development of related industries, there are also urgent problems to be solved

on February 24 this year, the 598 typhoon generator set in Jiuquan wind power base in Gansu Province was disconnected. On April 17, 702 units of 15 wind farms in Guazhou, Gansu Province were decommissioned. On the same day, in Zhangjiakou, Hebei Province, the 644 typhoon generator set of Guohua Jiaxin wind farm was off. On April 25, eight days later, another accident occurred in Jiuquan wind power base, and thousands of fans fell off

these accidents are caused by the impact of unstable wind and solar power on the power system, which is not only harmful to the safe operation of electricity, but also a blow to the rapidly developing new energy industry. The basic national conditions of China's regions rich in solar and wind energy resources and the reverse distribution of main load centers determine that China's wind power development is dominated by large-scale centralized development and long-distance high-voltage transmission. Photovoltaic power generation access presents the characteristics of large-scale centralized access and distributed access, striving to find and solve the difficulties and problems existing in the use of users in a timely manner, The large-scale concentration of new energy power will undoubtedly bring great challenges to the safe and stable operation of electricity. There are mainly three technical problems: the reverse regulation of wind power and photovoltaic output and the difficulty of effective prediction, which pose a huge challenge to the peak shaving of power system. New energy is large-scale and requires the construction of a large number of standby capacity and peak shaving power supply; The variable output and instantaneous impact of wind power and photovoltaic affect the transient stability and frequency stability of power; The voltage fluctuation, flicker and harmonic generated by wind power and photovoltaic make the power quality difficult to meet the needs of users

demonstration project to break through bottlenecks

in the face of these problems, China's wind power and photovoltaic industry has a strong industrial production capacity, but it has not yet fully formed an independent design capacity, and there is a large gap between the characteristics and control technology and the requirements

in this situation, on April 29th, 2009, the Ministry of finance, the Ministry of science and technology, the national energy administration and the State Electricity Corporation jointly held the golden sun project coordination meeting. State Grid Corporation of China actively responded to the requirements of the national golden sun project and proposed to plan and construct one to two 100 megawatt level landmark demonstration projects in North China or the western region from point to area and from point to area, opening the curtain on the construction of the national scenic energy storage and transmission demonstration project. Located in Bashang Zhangbei area of Zhangjiakou, Hebei Province, one of the national ten million kilowatt wind power bases, the national wind energy storage and transmission demonstration project is the largest large-scale new energy friendly integrated demonstration project integrating wind power, photovoltaic power generation, energy storage and intelligent dispatching transmission projects in the world. The project plans to build 500000 kW wind farms, 100000 kW photovoltaic power stations and 110000 kW energy storage devices. In the first phase of the project, 100000 kW of wind power, 40000 kW of photovoltaic power generation and 20000 kW of energy storage will be constructed, and a 220 kV intelligent substation will be built. The first phase of the national scenery storage and transmission demonstration project generates an average of 260million kwh per year, reducing the consumption of about 93600 tons of standard coal and about 180000 tons of carbon dioxide emissions per year

after the completion of the national scenery storage and transmission demonstration project, it will become a new energy demonstration project with the highest level of intelligent operation and the most flexible and diverse operation modes in China. The construction of the project will drive the technological upgrading of wind power and photovoltaic power generation related industries, which are usually maintained at 380 ℃, promote the introduction of technical standards and management regulations for wind power and photovoltaic power generation, and promote the sound and rapid development of the national new energy industry