The profound influence of automation technology on the development of green power

Abstract:Automated Expo journalist interviewed Mr. Hou Ziliang, CEO of Eastern Automation, and both parties made a dialogue on the development prospects of electronic automation in China and the future development direction.

"Automation Expo": How will China's electricity develop during the 12th Five-Year Plan period?

Hou Ziliang: At present, the national power development plan during the 12th Five-Year Plan period is in the process of being formulated. However, according to the prediction of relevant authorities in the "2010 Energy and Economic Development" forum, as our industrialization and urbanization continue to advance, the demand for electricity will continue to grow rapidly. It is estimated that the total installed capacity of electricity in China will reach 1.43 billion kW by 2015, 2020 Annual installed capacity will reach 17 to 1.8 billion kilowatts. During the "Twelfth Five-Year Plan" period, it needs a new installed capacity of 400 million kilowatts.

Under the national green power policy, we must vigorously develop clean energy. The newly installed capacity of 400 million kilowatts is roughly distributed as follows: hydropower - 100 million kilowatts; nuclear power - 103.6 billion kilowatts; wind power and renewable energy - 1.068 billion kilowatts Gas-electricity - 1,016 million kilowatts; thermal power - 1,200 million kilowatts.

In order to realize the goal of non-fossil energy in 2020, the installed capacity of non-fossil energy in China will exceed 550 million kilowatts, accounting for more than one third of the country’s total installed capacity of power generation, including 300 to 350 million kilowatts of hydropower. 0.7 to 80 million kilowatts, 1.0 to 150 million kilowatts of wind power.

However, due to the existing energy structure, coal power will still dominate in the newly installed capacity during the “+2 5” period. By 2015, the country’s coal power capacity will reach 920 million kilowatts, accounting for more than 64% of the total installed capacity. It reached about 1.03 billion kilowatts, accounting for 57% to 61% of the total installed capacity. Therefore, it is still the leading direction to promote the clean, efficient, and intensive development of coal-fired power.

"Automation Expo": Under the green power development policy, what is the status of automation in thermal power plants? What are the innovations and breakthroughs?

Hou Ziliang: Under the guidance of the Green Power Development Policy, nuclear power, hydropower, and wind power will be rapidly developed, and their corresponding automation technologies will be fully developed. It will also provide automation companies with new business opportunities and growth points. However, it should be clearly seen that for a long period of time, the total installed capacity of thermal power and the newly installed capacity of the "12th Five-Year Plan" will still dominate the energy structure. Therefore, the development of automation of thermal power plants and the promotion of energy-saving and emission reduction of thermal power plants are still an important strategic task for the development of green power with low input and high output.

In the 1990s, by introducing a large number of advanced automation technologies and equipment from the world, China's thermal power plant automation equipment has reached the international advanced level. At the same time, through ten years of force, China's thermal power plant automation application technology has gradually approached the world's advanced level. Before entering the 21st century, the Power Planning and Design Institute proposed a thermal power plant automation application plan for the demonstration power plant in 2000. Through the efforts of the first decade of the 21st century, the planning goals were basically achieved and breakthroughs were made. + The year's rapid development of thermal power plant automation application technology has achieved:

(1) The DCS application technology is basically mature, and pilot and gradual application of FCS technology application have been carried out. The digital demonstration projects of Huaneng Jiutai and Jinling Power Plant have achieved success, and there is a trend of accelerated application and promotion in the country.

(2) Plant-level management information system (MIS) and plant-level monitoring information system (SIS) have been widely used in thermal power plants and have achieved good results.

(3) The control technology of 600MW and 1000MW ultra supercritical units has been basically mastered, and the number is the highest in the world. The self-start-stop control system (APS) of the 1000MW ultra-supercritical unit, which is embodied in the integrated level of the entire thermal power unit automation, was also the first breakthrough in the Huaneng Haimen Power Plant.

(4) Auxiliary workshops in thermal power plants have achieved a highly centralized control of the network and the power plant operators have substantially reduced.

(5) The whole plant's “four machines and one control” highly centralized control and physical dispersion among electronic devices broke through the old frame and formed a new design concept of the main plant layout. To sum up, we can say without exaggeration that China's thermal power plant automation application technology has reached and partially surpassed the world advanced level, and has made some innovations.

“Automation Expo”: More and more products independently developed by domestic manufacturers are active in the power industry. Please talk about the development of independent innovation.

Hou Ziliang: In the 1990s, although the automation application level of power plants gradually approached the advanced level in the world, the main automation equipment was all imported. The development of national brand automation equipment has just begun, and the low-end market can only be occupied at a low price in the competition.

In the first decade of the 21st century, with the automation application level of power plants in China reaching and partially surpassing the advanced level in the world, independent innovation in automation equipment has also made some progress:

(l) Major breakthroughs have been made in the independent innovation of large-scale generating units DCS. The DCS produced by national enterprises represented by Beijing Guodian Zhishen Control Technology Co., Ltd. and Beijing Helishi System Engineering Co., Ltd. was successfully applied to 600MW and 1000MW grade supercritical and ultra-supercritical generator sets, breaking through internationally renowned multinational companies. In the high-end market in China's power industry dominated the world, the overall technical level of DCS development has been at the international advanced level.

(2) The power plant information system, especially the plant-level monitoring information system (SIS), is an innovative concept proposed by China, so it began with the independent development of Chinese enterprises and occupied the vast majority of our country's power plants. market.

It is gratifying that large-scale real-time databases, one of the major equipments of the country, have also started to break the situation where foreign brands dominate the world.

However, on the whole, there is still a big gap in the independent innovation of power plant automation equipment, and it still cannot meet the needs of the power generation and emission reduction of the generator set under the green power policy.

Automation Expo: What are the goals of thermal power plants in the second decade of the 21st century?

Hou Ziliang: In the second decade of the 21st century, thermal power plants are faced with the arduous goals and important tasks of accelerating the construction of digital power plants, improving the intelligence of thermal power plants, and meeting the development requirements of smart grids to the maximum extent:

(l) Accelerate the construction of digital power plants to lay the foundation for comprehensively improving the degree of intelligence in thermal power plants.

Smart grid is a flexible concept. Different countries can pay attention to different priorities according to their own needs or development levels at different times. The “Strong Smart Grid” proposed by the State Grid Corporation emphasizes centralized management and control of the national grid through a solid grid foundation. Ensure safety and efficiency. The smart grid is first of all a digital grid, starting with digitization. In the same way, intelligent power plants are first of all digital power plants, and they must start with digitalization. They must vigorously develop the application of fieldbus control systems. The demonstration project has already provided us with inspirations. With the deepening of the digitization of power plants, the intelligence of control and protection systems (such as signal fault tolerance) and the intelligent management of basic measurement and control equipment will be strengthened. Therefore, in the past decade, we hope to boldly liberalize the pace of digital power plant construction on the basis of existing digital power plant demonstration projects.

(2) Vigorously increase the degree of intelligence in thermal power plants and maximize the strategic tasks of energy-saving and emission reduction in thermal power plants under the green power policy.

The development of advanced application software with intelligent dispatching software, security and optimized management software as the core will increase 515 to a new level. It has been thirteen years since the concept of SIS was proposed in 1997 and has been promoted. With China's own specifications, significant results have been achieved and applications have been widely promoted. However, it should be noted that SIS is still in its infancy. The value of SIS depends on the level of application software. Currently, data mining technology, intelligent scheduling software, and related security and optimization management software are not yet at a low level, and these advanced applications are overcome. Software should be the goal of SIS for the next decade.

Taking the unit's automatic start-stop system (APS) as an outline, the overall automation level of the thermal power unit is taken to a new level. In the past 20 years, most of the APS functions have not been realized except for the few units introduced. The reason is because there are still many weak links in the integrated automation system of the unit, and whether APS can reflect the overall level of unit automation. Therefore, we should seize this program in the next ten years to promote the overall automation level of generators.

The development of combustion optimization control technology will contribute to achieving the goal of coal-fired power plant energy-saving and emission reduction.

(3) Conquer the key basic measurement and control equipment in the large-scale thermal power plant automation system to ensure the real realization of the various functions of the automation system.

So far, the pace of independent innovation of transmitters and actuators has been difficult. Basically, foreign brands have dominated the world, and they need the relevant departments to increase support and achieve breakthroughs as soon as possible.

In addition, special instruments such as furnace temperature measurement and coal quality on-line analysis that are needed to optimize combustion have long been highly valued and breakthroughs have been made internationally. We should support related companies to adopt various means such as introduction, digestion, or independent development to achieve commercialization. To ensure that the combustion optimization is truly achieved.

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