By the 1000 kV southeastern countries responsible for the construction of power grid - Nanyang - Jingmen UHV AC pilot demonstration project by the state, National Grid proposed UHV AC transmission technology standard seven major categories 77 formed in the construction of the project was recently Standard system. It is reported that the localization rate of this project's equipment reaches 90% , establishing China's leading position in the field of UHV transmission technology research, equipment manufacturing, engineering design, construction and operation.
According to sources from the State Grid, the " 12th Five-Year Plan" period is an important stage for the development of China's UHV power grids. On the basis of UHV AC pilot demonstration projects, the " Three Chinas " UHV AC synchronous power grid construction will be accelerated.
2015, "Three Chinese" UHV grid will form a "three vertical and three horizontal one ring", Ximeng Mengxi Zhangbei Shanbei energy base by three longitudinal channels to UHV "three," send Electricity, northern coal-fired power, southwest hydropower transmission to the North China, Central China, and Yangtze River Delta UHV ring networks via three trans-horizontal UHV AC channels. In 2020 , the “ Three Chinas †UHV synchronous power grid as the center, Northeast UHV power grid, The strong smart grid system of the Northwest 750 kV power grid as the delivery end will also be built one after another.
Cao Guangjing, Chairman of China Three Gorges Corporation, stated at the meeting that currently the hydropower technology exploitable capacity in Sichuan and Yunnan has exceeded 100 million kilowatts. It is estimated that by 2020 , the scale of hydropower development and transport in the southwest region will reach 60 million kilowatts, and it is expected that In eastern China, the power transmission distance in Huazhong load area will reach 2000-3000 km . Cao Guangjing said that in the future, the Three Gorges Group will continue to develop Xiangjiaba and Xiluodu hydropower stations in the lower reaches of the Yangtze River. Therefore, large capacity, long distance, and low loss The construction of UHV transmission lines is an inevitable choice to guarantee the output of hydropower .
Application fields of solar panels:
1. User solar power supply: (1) Small power supply ranging from 10-100W, which is used for military and civilian life in remote areas without electricity, such as plateaus, islands, pastoral areas, frontier posts, etc., such as lighting, TV, tape recorders, etc.; (2) 3 - 5KW home roof grid-connected power generation system; (3) Photovoltaic water pump: solve deep water well drinking and irrigation in areas without electricity.
2. Transportation field: such as navigation lights, traffic/railway signal lights, traffic warning/sign lights, Yuxiang street lights, high-altitude obstruction lights, highway/railway wireless telephone booths, unattended road shift power supply, etc.
3. Communication/communication field: solar unattended microwave relay station, optical cable maintenance station, broadcast/communication/paging power system; rural carrier telephone photovoltaic system, small communication machine, GPS power supply for soldiers, etc.
4. Petroleum, marine, and meteorological fields: cathodic protection solar power systems for oil pipelines and reservoir gates, domestic and emergency power supplies for oil drilling platforms, marine testing equipment, meteorological/hydrological observation equipment, etc.
5. Lamp power supply: such as garden lamps, street lamps, portable lamps, camping lamps, mountaineering lamps, fishing lamps, black light lamps, rubber tapping lamps, energy-saving lamps, etc.
6. Photovoltaic power station: 10KW-50MW independent photovoltaic power station, wind-solar (firewood) complementary power station, various large parking plant charging stations, etc.
7. Solar buildings: Combining solar power generation with building materials will enable large buildings in the future to achieve self-sufficiency in electricity, which is a major development direction in the future.
8. Other fields include (1) Supporting cars: solar cars/electric cars, battery charging equipment, car air conditioners, ventilation fans, cold drink boxes, etc.; (2) Solar hydrogen production plus fuel cell regenerative power generation system; (3) Sea water Power supply for desalination equipment; (4) Satellites, spacecraft, space solar power plants, etc.
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