Gansu ranks third in the country in terms of grid-connected wind power installed capacity and first in the country in terms of installed photovoltaic power generation capacity. Analyzing and judging the gains and losses of its renewable energy development is of great importance for accelerating the construction of renewable energy bases in China, especially the development of wind power bases in North China, Northeast China and Northwest China. Reference meaning.
The National Energy Administration has recently completed the special supervision work for the grid connection of renewable energy power generation in Gansu. According to the inspection and investigation of the station, the "Renewable Energy Power Generation Station in Gansu Supervision Report" (hereinafter referred to as the "Report") has been formed. The "Report" discloses that while Gansu's renewable energy is developing rapidly, there are many problems such as insufficient connection of power grid construction, difficulties in local consumption and delivery, serious abandonment of wind and solar power, and insufficient electricity price subsidies for renewable energy.
In this regard, the National Energy Administration has put forward regulatory suggestions in coordinating and coordinating planning, promoting the construction of external delivery channels, improving consumption capacity, and improving industrial policies, etc., to further guide the grid connection of renewable energy power generation, and promote the healthy and orderly development of renewable energy. .
In 2013, the wind power and photovoltaic power generation increased by 26.8% and 510.15% year-on-year.
Gansu is an important new energy base in my country. After 2008, its wind power and photovoltaic power generation entered a stage of rapid and large-scale development. The "Report" shows that by the end of 2013, Gansu's total installed capacity of power generation was 34.8932 million kilowatts, of which the province's grid-connected wind power installed capacity was 7.0281 million kilowatts, a year-on-year increase of 17.69%, accounting for 20.14% of the province's total installed capacity; photovoltaic power generation installed capacity The capacity is 4.2984 million kilowatts, a year-on-year increase of 1025.24%, accounting for 12.32% of the province's total installed capacity. In the Hexi area where wind power and photovoltaic projects are relatively concentrated, the installed capacity of wind power reaches 6.346 million kilowatts, and the installed capacity of photovoltaics is 4.168 million kilowatts.
Compared with the end of the "Eleventh Five-Year Plan", the installed capacity of new energy in Gansu has increased by 7.4 times, surpassing hydropower and becoming the second largest power source in Gansu power grid. In addition, according to the "Twelfth Five-Year Plan for Wind Power Development" issued by the National Energy Administration, by 2015, the cumulative installed capacity of wind power in Gansu will reach more than 11 million kilowatts.
In 2013, the power generation of Gansu province was 119.501 billion kWh, the power generation of wind turbines was 11.918 billion kWh, a year-on-year increase of 26.8%; the power generation of photovoltaic units was 1.895 billion kWh, a year-on-year increase of 510.15%. New energy power generation increased by 6.6 times compared with the end of the "Eleventh Five-Year Plan".
The leap-forward development of new energy in Gansu is inseparable from the active promotion of local governments. In December 2012, the Gansu Provincial Government issued the "Twelfth Five-Year Plan for New Energy and Renewable Energy Development in Gansu Province", which promoted the development of new energy and renewable energy. This plan clearly states that by 2015, the installed capacity of wind power in Gansu will reach 17 million kilowatts, and the installed capacity of photovoltaic power generation will reach 5 million kilowatts.
The "Report" pointed out that in the case of the rapid development of renewable energy in Gansu, power grid companies have effectively ensured the safe and stable operation of the power grid, and developed the "Renewable Energy Active Intelligent Control System in Gansu Province", which uses existing channels to reduce energy consumption to a certain extent. Abandoned wind, abandoned photovoltaic power loss.
The increasingly standardized operation and management of power generation enterprises has also promoted the rapid development of renewable energy. According to the "Report", by the end of 2013, all 51 wind farms completed and put into operation in Gansu had built wind power prediction systems and completed low voltage ride-through capability testing. 86.21% and 81.69%.
The problem of abandoning wind and light is severe, and the lack of consumption is limited and the grid connection needs to be solved
Although Gansu's wind power and photovoltaic industries have achieved impressive development performance in 2013, the phenomenon of abandoning wind and light is still a serious problem for the healthy development of renewable energy.
According to the "Report", according to the summary of the wind curtailment statistics of various power generation enterprises in Gansu Province, the abandoned wind power in Gansu Province in 2013 was 3.102 billion kWh, accounting for 19.11% of the national abandoned wind power and 85.86% of the abandoned wind power in the northwest region. The abandoned wind rate was 20.65%, nearly double the national average of 10.74%. According to the summary of the solar power abandonment statistics of various power generation enterprises in Gansu Province, the amount of photovoltaic power abandoned in Gansu Province in 2013 was about 303 million kWh, and the abandonment rate was about 13.78%. In 2013, the utilization hours of wind power generation in Gansu was only 1806 hours, and the utilization hours of photovoltaic power generation was 1523 hours.
In this regard, the "Report" analysis pointed out that various types of power sources such as wind, light, fire, and water in Hexi area need to be sent through existing channels, and the channels are occupied by each other; the speed of power construction is faster than that of power grid construction, and power grid construction is relatively lagging ; Although the Jiuquan 750 kV second channel has been completed, it is still unable to access the Internet in full, etc., which are the reasons for abandoning wind and light.
Experts in the industry pointed out that the connection between power supply and power grid construction is not enough, and the wind power base’s external transmission channel restricts the output of electricity, which is the main reason for abandoning wind and light.
Take the Hexi area where wind power and photovoltaic projects are relatively concentrated as an example. The total installed capacity of wind power and photovoltaics in Hexi has reached 10.514 million kilowatts, and its electricity load level is only about 3.8 million kilowatts, which cannot be consumed locally. satisfied. The maximum transmission capacity of the transmission channel from the Hexi region to the northwest main grid is only 5.2 million kilowatts. Based on the current consumption and transmission capacity analysis, the Hexi power grid cannot meet the needs of wind power and photovoltaic surplus power delivery, and the maximum limited capacity in summer is 3.08 million to 3.78 million. kW, the maximum limited ratio is 26%~31%; the maximum limited capacity in winter is 1.98 million~2.68 million kW, and the maximum limited ratio is 18%~24%.
The "Report" shows that some areas such as Jiuquan, Jiayuguan, Wuwei and other areas have serious restrictions on the transmission of local power grids, and the maximum restricted ratio in Wuwei Huangtai area, Jiayuguan Photovoltaic Industrial Park, and Dunhuang area in summer is more than 50%. Among them, Wuwei Huangtai area in summer The restricted ratio is as high as 79%.
In response to the above problems, the "Report" suggests that the construction of Gansu's delivery channels should be promoted to improve the capacity of renewable energy consumption.
On the one hand, it is necessary to adhere to the principle of unified planning and supporting construction of power supply and power grid, speed up the construction of cross-provincial and cross-regional delivery channels, ensure maximum renewable energy access to the Internet through cross-regional and cross-basin scheduling, and coordinate the construction and coordination of delivery channels. The development cost of wind power shall be determined according to the market rules, and the consumption market shall be determined, so as to realize the optimal allocation of renewable energy in the national electricity market. On the other hand, it is necessary to promote the local consumption of renewable energy by means of industrial transfer, actively promote the direct transactions between renewable energy power generation companies and power users, improve the compensation mechanism for auxiliary services in the regional power market, and increase the consumption of renewable energy by all parties in the market. Energy positivity.
The "Report" also disclosed that the grid companies' handling of the access system and grid-connected acceptance work were not perfect; the implementation of "three public" dispatching was not open and transparent, and other issues that affected the grid connection of renewable energy power generation, and discussed how the State Grid Corporation of China and Gansu Electric Power Company Further standardize the work flow for access to the grid and put forward suggestions.
The level of planning, overall planning and coordination needs to be strengthened urgently, and the electricity price subsidy is seriously in arrears
Regarding the troubling factors affecting the healthy development of renewable energy, the "Report" also disclosed two major problems: "lack of overall planning for early wind power construction" and "inadequate electricity price subsidies for renewable energy".
The "Report" pointed out that by the end of 2011, Gansu Province had approved a total of 6.8241 million kilowatts of wind power projects. Among them, the state approved 4.415 million kilowatts, and Gansu Province approved 2.4091 million kilowatts. Judging from the data, Gansu Province has successfully completed the planning and construction of the first batch of projects (3,813,500 kilowatts) and concession projects and demonstration projects (601,500 kilowatts) of Jiuquan Wind Power Base approved by the state. It was implemented in 2011. Gansu lacked overall planning for wind power construction before the end of 2011. Most of the approved 2.4091 million kilowatt wind power projects were scattered development projects. These projects affected the overall utilization of wind energy resources in Gansu Province to a certain extent. The construction and Gansu 750 kV supporting power grid lacked overall planning, some completed projects occupied the delivery and consumption space of Jiuquan Wind Power Base, and the delivery of projects under construction could not be fully implemented.
In this regard, the "Report" suggests that the overall coordination of renewable energy planning, overall energy planning and power planning should be strengthened, renewable energy planning should be formulated with consumption and transmission as the core, and the coordinated development of power project development and power grid construction should be adhered to, and the power grid should be increased. Enterprises implement the implementation of government plans, reasonably determine the speed and scale of renewable energy development, establish and improve the planning work assessment system, and effectively enhance the authority and binding force of planning implementation.
In terms of the implementation of the electricity price subsidy policy, the "Report" disclosed that due to factors such as the additional standard for renewable energy electricity price and insufficient collection of electricity, from May 2011 to December 2013, the Ministry of Finance and other departments owed a total of subsidies to power generation projects in Gansu. 3.642 billion yuan, of which 2.264 billion yuan has been included in the subsidy catalogue (as of the end of March 2014, Gansu Electric Power Company received the first subsidy fund of 1.02 billion yuan allocated by the government in 2014), not included in the subsidy catalogue The arrears of the project are 1.378 billion yuan.
In this regard, the "Report" gives suggestions for improving the policies and management regulations of the renewable energy industry, emphasizing the further implementation of the renewable energy electricity price subsidy policy, increasing the additional collection of renewable energy electricity prices, cashing the renewable energy subsidy funds on time, improving the Appropriate payment management methods, speed up the research and formulation of renewable energy power quota consumption mechanism.