Different from the situation that the scale of power grid investment has continued to increase since the “Twelfth Five-Year Planâ€, the growth rate of China's power grid construction declined slightly in 2017. According to data from the National Energy Administration, the investment in China's power grid construction in 2017 was 531.5 billion yuan, a slight decrease of 2.2% year-on-year, the first decline since 2010. From the perspective of the internal investment structure of the power system, the investment in power grid construction in the past year exceeded the power supply construction by 261.5 billion yuan, accounting for 66.3% of the total investment in power infrastructure investment, a substantial increase of 5.1 percentage points year-on-year. This is also the fifth consecutive time that the power grid construction investment has exceeded the power construction investment since the “Twelfth Five-Year Planâ€.
In fact, the base effect of the higher growth rate of grid investment in 2016 also reduced the growth rate in 2017 to a certain extent. Guided by the national distribution network construction and transformation action plan and a new round of rural power grid transformation and upgrading, the growth rate of grid investment in 2016 rose to 16.9%. From the perspective of power investment trends, the saturation of power grids is still less than that of power sources. China still needs continuous investment in power grids in terms of renewable energy consumption and power supply reliability. With the in-depth development of a new round of energy revolution with re-electification as the fundamental path, and the gradual improvement of most power supply and transmission line skeletons, the focus of China's power grid construction investment has shifted from the backbone network to the distribution network side, and the power grid construction From the high-speed growth phase to the high-quality development phase.
Transformation: grid investment growth slowed slightlyKnowing what it is, knowing where it is, can understand its future. Since 2010, China's power grid construction investment has continued to increase and the speed has been accelerating. Looking back at the development track of the power grid, the grid backbone network is becoming stronger and stronger, the distribution network and the rural power supply water are steadily improving, and the grid service clean energy development capability is significantly enhanced.
After checking the relevant statistics, the reporter found that since the "Twelfth Five-Year Plan", the investment in power grid construction has been improved to varying degrees every year. Among them, in 2011, it completed 368.2 billion yuan, up 6.77% year-on-year; in 2012, it completed 369.3 billion yuan, up 0.2% year-on-year; in 2013, it completed 389.4 billion yuan, up 5.44% year-on-year; in 2014, it exceeded 4000 billion yuan. 411.8 billion yuan; completed 460.3 billion yuan in 2015, the growth rate reached double digits for the first time; in 2016, the first break of the 500 billion mark, reaching 542.6 billion, the growth rate rose to 16.9%.
According to statistics released by the National Energy Administration, in 2017, China’s major power companies completed an investment of 801.5 billion yuan in power engineering construction. Among them, the investment in power engineering construction was 270 billion yuan, down 20.8% year-on-year; the investment in power grid construction was 531.5 billion yuan, down 2.2% year-on-year.
"China's economy has shifted from a period of rapid growth to a stage of high-quality development." The Central Economic Work Conference made a clear judgment on the basic characteristics of "socialism with Chinese characteristics has entered a new era and China's economic development has entered a new era." The investment construction data of China's power grid almost completely confirms this transformation—from “high speed†to “high quality†and from “growth†to “developmentâ€.
The value of grid investment is reflected in new transmission lines and substation equipment. In 2017, the length of the newly added transmission line of 220 kV and above in the national grid was 41,459 km, an increase of 18.5%; the capacity of the newly added 220 kV and above was 226.63 million kVA, a slight decrease of 0.5 year-on-year. %.
In the past year, a total of two railways and six straight high-voltage transmission projects have been completed. Among them, the National Air Pollution Prevention and Control Action Plan has been completed in an all-round way, basically forming an UHV transmission network from West to East and North to South. The nationwide completion of cross-regional power transmission was 423.5 billion kWh, an increase of 12.1% year-on-year, and the inter-provincial power transmission was 1.13 trillion kWh, a year-on-year increase of 12.7%.
According to the data of the State Grid Corporation and China Southern Power Grid Corporation's 2017 work conference, in the past year, the State Grid Corporation invested a total of 608.1 billion yuan in development, and fixed assets investment was 506.6 billion yuan, of which power grid investment was 485.4 billion yuan. 110 (66) kV and above lines started 49,000 km and put into operation 55,000 km; substation (commutated) capacity started 260 million kVA (kilowatt) and put into operation 350 million kVA (kilowatt). The China Southern Power Grid Corporation's northwest DC bipolar low-end and receiving end supporting projects, the Luxi back-to-back DC expansion project and other major projects of the “West-East Power Transmission†transmission channel were successfully put into operation, forming a total of 18 500 kV and “eight crosses and straight†In the above-mentioned large channel, the total power of “West-to-East Power Transmission†in 2017 reached 202.8 billion kWh, a record high.
The construction of the power grid has increased, bringing new and effective investment to the regional economic development. The performance of power equipment manufacturing enterprises has also risen. According to the research data, for every 100 million yuan invested in power grid investment, the industry will generate 300 million yuan. In 2017, the national grid invested 531.5 billion yuan, directly bringing market output value of more than one trillion yuan.
Trend: Distribution network construction into investment focusFrom high-speed growth to high-quality development, it means that the power grid construction should shift from simply pursuing total expansion to pursuing the overall improvement and improvement of internal structure, power system and service quality based on economic growth.
In the internal investment structure of the power system, China's power supply and power grid investment have different investment periods in different periods. From the beginning of the “Twelfth Five-Year Plan†to the next 10 years or even longer, the investment focus has gradually shifted to the intelligentization of the power grid and the construction of the distribution network, which is more biased towards the distribution and power consumption.
Due to the high growth rate and large base of grid investment in 2016, the growth rate of China's power grid construction declined slightly in 2017. This is not unrelated to the recent round of new rural power grid renovation and upgrading of nearly 100 billion yuan investment projects and accelerating the construction and transformation of the national distribution network.
In 2017, grid investment continued to tilt towards distribution network and rural network, and a new round of rural network transformation and upgrading achieved significant progress. The proportion of investment in power grids of 110 kV and below accounted for 53.2% of the total investment of the power grid; the new round of rural power grid transformation achieved significant progress in stages, and completed the implementation of a new round of rural power grid reconstruction and upgrading project during the 13th Five-Year Plan period. The "Opinions" (State Council issued [2016] No. 9) document "the transformation and upgrading of the central village power grid, to achieve full coverage of the wells in the plain area."
In September 2017, State Grid Corporation won a new round of rural power grid transformation and upgrading in the past three months, “two years of hard battlesâ€, with an accumulated investment of 142.4 billion yuan, completing 1.35 million eye farm wells and 66,000 small towns ( The central village) power grid renovation and upgrading, 78,000 natural villages through the power, benefiting 160 million rural population and 140 million acres of farmland. Last year, China Southern Power Grid completed a new round of rural power grid reconstruction investment of 34.06 billion yuan, 7665 small towns and central villages to achieve power grid upgrades, 4,709 wells completed power-on tasks, and 262 poor villages were connected to power.
The backbone network construction is still the most certain part of the grid investment in 2018. According to the plan of the State Grid Corporation, in 2018, the UHV AC project of Beijing West-Shijiazhuang, Shandong-Hebei Ring Network and Sutong GIL Pipe Gallery will be accelerated. The Zhundong-Weinan UHV DC project will be completed during the year. China Southern Power Grid Corporation to send electricity to the northwest of Guangdong Province ±800 kV UHV DC transmission project is scheduled to be completed and put into operation before the end of June this year, Wudongde power station transmission Guangdong Guangxi DC transmission project will be approved and started construction as soon as possible.
As far as 2017 is concerned, the saturation of power grid construction is still less than that of power supply, and the phenomenon that power investment is weaker than grid investment is expected to continue. Although China's power system's overall supply capacity has been surplus, there is still no need for continuous power grid construction investment in renewable energy consumption capacity, peaking capacity, and power supply reliability.
China Southern Power Grid Corporation proposed that the rural network will continue to be upgraded and upgraded in 2018, and the rural distribution network with reasonable structure, safety and reliability will be basically built. The reliability of power supply at the end of the year is not less than 99.78%, and the voltage qualification rate is not lower than 98.03. %, the average household capacity of the rural household is not less than 1.93 kVA. State Grid Corporation also proposed that the implementation of beautiful rural service projects, including the upgrading of rural power grids, the equalization of power supply services, and the construction of power grid supporting projects, with an investment of 348.3 billion yuan, completed the special project of rural network transformation and upgrading and demonstration of "small well-off electricity" County agricultural network construction, improve the configuration of service facilities in township power supply.
With the acceleration of new urbanization and agricultural modernization, new energy, distributed power, electric vehicles and energy storage devices are developing rapidly. The terminal power load presents a new trend of rapid growth, large changes and diversification, and accelerates the upgrading and upgrading of distribution networks. The task is getting more and more urgent. It is worth pointing out that in the investment in power grid construction, the core indicator of the main network investment is the growth rate of electricity consumption. With the slowdown of this indicator and the increasingly perfect backbone network construction, the focus of grid investment will continue to the distribution network. Transfer.
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