Analysis of scientific research and production of power electronic equipment in China in 1998 Xi'an Power Electronic Technology Research Institute 1 Development status of power electronic equipment at home and abroad In recent years, the performance and technical level of China's power electronic equipment have been significantly improved. The output of traction power equipment and electrothermal metallurgy and electrochemical equipment account for a large share. Digital AC, DC transmission equipment, static reactive power compensation equipment, high-voltage electrostatic dust removal, power recovery, high-voltage DC transmission and other equipment have been successfully developed. Various power supplies developed with IGBT devices currently occupy a certain market. However, compared with foreign power electronic equipment technology, domestic power electronic equipment technology lags behind the level of international developed countries on average by about ten years, which is equivalent to the international mid-1980s level. At present, domestic power electronic equipment is mainly limited to rectifier power supplies using silicon rectifiers and silicon thyristors, DC drives and thyristor frequency conversion equipment, and high-tech products reflecting the development direction of contemporary power electronics are only in the research and development stage. Some large enterprises that urgently need new power electronic equipment (such as universal AC motor frequency conversion speed regulation equipment) have to import at high prices. Moreover, some old products such as DC drive equipment and large-scale rectified power supplies have been replaced by similar foreign products due to their poor reliability. At the same time, the supporting level of domestic power electronic products is low. So far, there is no supporting production of capacitors, inductors, resistors and transformers for power electronics in China. The reliable operation of power electronic equipment is closely related to the normal operation of the national economy. Judging from the current development abroad, reliability test research will tend to be more comprehensive and reliability technology will tend to be more advanced. Computer simulation technology has been introduced abroad for test simulation and failure analysis; and the latest test methods in other disciplines have been applied Reliability of power electronic components and power electronic equipment. The development of foreign power electronic equipment has matured, and its digitalization, modularization, serialization, and standardization are all very high. At present, its technical development is mainly to improve the communication ability and application scope of products, and the application ability of engineering applications. Expand application areas and markets. The development of digital products in China is relatively slow, the technical level of the products is not high, there is no standardization, and there is a lack of stereotyped products. Moreover, the existing equipment products are very large in volume and have low technical content. In the future, we should strengthen the development of some high-tech products, and work harder in terms of reliability, volume and weight. At present, another development trend of power electronic technology is medium and high-voltage high-power converter technology and low-voltage high-efficiency output converter technology. Electromagnetic compatibility (EMC) is a hot issue of power electronic technology. Due to the particularity and measurement of the problem itself Specific difficulties, the current research on electromagnetic compatibility in power electronic systems is still in its infancy. 2 Output of power electronic equipment 2.1 Production of power electronic equipment in China in 1998 In 1998, 30 power electronic equipment manufacturing plants in the whole industry produced 7,365 power electronic equipments, with a total of 298,4117.8 kilowatts. Among them, 6714 sets of thyristor equipment, 1828887.3 kilowatts, accounting for 61.29% of the total equipment output of the year; 651 sets of rectifier equipment, 1155230.5 kilowatts, accounting for 38.71% of the total equipment output. 2.2 The output of each series of products In 1998, the output order of each series of power electronic equipment products is listed in Table 1. A total of 37 series of 27 types of equipment products were produced. The largest output is traction power equipment, which is 1304768.0 kW, accounting for 43.72% of the total output of the equipment; the output of electrothermal metallurgy and electrification equipment ranked second, 1170344.9 kW, accounting for 39.22% of the total output of the equipment; Ranked third, 160120.0 kilowatts, accounting for 5.37% of total equipment output; AC motor speed control ranked fourth, 101910.0 kilowatts, accounting for 3.42% of total output, and other power equipment output fell to fifth place, 54227.5 kilowatts, accounting for total equipment output 1.82% of yield. 3 Analysis and forecast 3.1 Analysis of China's power electronic equipment production in 1998 Table 2 is a comparison table of the output of each series of equipment products in 1998 and 1997. It compares the increase and decrease of production of each series of equipment in two years in detail. From the overall situation, in 1998, the output of equipment products increased by 1.242 million kilowatts, an increase of 70.0%. The largest increase in output of each series of products is the traction power supply, with an output of 1.3048 million kilowatts and an increase of about 1.216 million kilowatts. The largest reduction in production was in electrothermal metallurgy and electrification equipment, which reduced production by 145,600 kilowatts. In addition, two new types of power electronic equipment were added, namely high-voltage direct current transmission and high-frequency power supply, with output of 1037 kW and 405 kW, respectively. 3.2 Output and market of power electronic equipment in China in the next 2 to 3 years Field dynamic prediction Analysis of scientific research and production of power electronic equipment in China in 1998 Table 1 Statistics of the output of major products of power electronic equipment in 1998 Serial number Rectifier equipment Thyristor equipment total % Of total production station kilowatt station kilowatt station kilowatt 1 Traction power 20 25601.0 295 1279167.0 315 1304768.0 43.72 2 For electrothermal metallurgy and electrochemistry 117 1078914.3 38 91430.6 155 1170344.9 39.22 3 Static reactive power compensation 7 160120.0 7 160120.0 5.37 4 AC motor speed regulation 3020 101910.0 3020 101910.0 3.42 5 Other power supply 28 27443.0 568 26784.5 596 54227.5 1.82 6 AC power controller 483 37042.0 483 37042.0 1.24 7 For motor excitation 17 16350.0 115 20317.0 132 36667.0 1.23 8 IF power supply 710 36580.0 710 36580.0 1.23 9 DC drive 2 400.0 642 35794.0 644 36194.0 1.21 10 Cascade speed regulating power supply 55 9610.0 55 9610.0 0.32 11 High voltage rectified power supply 58 174.0 168 8500.0 226 8674.0 0.29 12 Plating power 159 2314.0 99 2449.6 258 4863.0 0.16 13 Floating charging source 101 4371.3 101 4371.3 0.15 14 General industrial use 37 1368.1 60 2502.6 97 3870.7 0.13 15 Soft starter 65 3850.6 65 3850.6 0.13 16 Special Purpose 14 271.0 27 3024.0 41 3295.0 0.11 17 power plug 162 1225.9 81 959.0 243 2185.1 0.07 18 Nickel cadmium battery power 78 1280.0 78 1280.0 0.04 19 HVDC transmission 5 1037.0 5 1037.0 0.03 20 Closing power 31 1009.1 31 1009.1 0.03 twenty one Electric power supply 10 669.0 10 669.0 0.02 twenty two Explosion-proof charging power supply for mine 10 600.0 10 600.0 0.02 twenty three High frequency power supply 27 405.0 27 405.0 0.01 twenty four Power supply for film projection 8 174.0 8 174.0 0.02 25 ups 37 167.0 37 167.0 26 Arc welding rectifier 6 160.0 6 160.0 27 Fast charging power 5 143.0 5 143.0 total 651 1155230.5 6714 1828887.3 7365 2984117.8 100.00 % Of total production 38.71 61.29 100.00 Product Series Products In 1998, China's output of power electronic equipment was 2984117.8 kilowatts, an increase of 1242086.3 kilowatts from 1742031.5 kilowatts in 1997, an increase of 71.3%. Overall, the production and sales of power electronic equipment were good in 1998. Its characteristic is that the performance and technical level of the equipment have been significantly improved. All-digital AC and DC speed regulation equipment, intelligent control electrification rectification equipment, static reactive power compensation equipment, high-voltage electrostatic dust removal equipment and power recovery equipment have entered the application. High-voltage DC transmission, high-frequency power supply and other new equipment have begun production. IGBT devices have been widely used in various power supplies such as pulse width modulated DC switches. It can be seen that in 1998, China's power electronic equipment research and production has also made great progress. Under the current state-owned enterprise reform and many unstable conditions, it is not easy to achieve such achievements. It is believed that with the further improvement of enterprise mechanism and the development of power electronic technology, the output of power electronic equipment in China will increase steadily. Combined with the current situation in China, the development and market dynamics of power electronic equipment in the next 2 to 3 years can be predicted as follows: (1) AC and DC drive equipment AC and DC transmission equipment has developed into relatively mature products in China, and is currently developing in the direction of digitization. According to relevant surveys, China's digital AC and DC transmission equipment market has (60 ~ 70)% and 40% of the shares are occupied by several foreign companies (such as FUJI, ABB, SIEMEMS). The ratio of China's DC drive to AC drive market demand is 6: 4, and it is expected to be 5: 5 to 4: 6 in 2000. Therefore, the average annual domestic demand from 1998 to 2000 was more than 1.2 to 1.8 billion yuan. (2) AC frequency conversion speed regulation equipment AC frequency conversion speed control equipment has the characteristics of energy saving and consumption reduction, easy to use, etc. At present, most of the equipment with small and medium capacity (less than 200kVA) is imported. Therefore, this kind of equipment develops rapidly, and its market growth rate exceeds 20%. (3) Locomotive traction equipment As a special equipment for electric locomotives and diesel locomotives, locomotive traction equipment will have a great demand in the next few years. In particular, the popularity of transportation vehicles such as subways, trolleybuses, electric cars at stations and airports, and future maglev trains will drive the research and development of traction speed control transmission equipment in terms of efficiency, energy saving, and atmospheric pollution reduction, and will become power electronic equipment A new growth point. (4) Switching power supply equipment Return to Main List (ReturntoMainList) No.1 · 2.Jan.2000 Return to Main List (ReturntoMainList) Return to Main List (ReturntoMainList) The annual demand for various switching power supplies such as communication power supplies, industrial power supplies, lighting and household appliances is about 500,000 kilowatts, and by 2000 the demand is 1.5 million kilowatts. In particular, the computer has fully realized the switching power supply, and will be the first to complete the replacement of the computer power supply. Table 2 Comparison of the output of major products of power electronic equipment in 1998 with the previous year Serial number Production in 1998 (kw) 1997 output (kw) Increased or decreased output in 1998 (kw) 1 Traction power 1304768.0 88773.5 1215994.5 2 For electrothermal metallurgy and electrochemistry 1170344.9 1316016.8 ï¼145671.9 3 Static reactive power compensation 160120.0 16200.0 143920.0 4 AC motor speed regulation 101910.0 621.5 101288.5 5 Other power supply 54227.5 58000.7 ï¼3773.2 6 AC power controller 37042.0 53557.3 ï¼16515.3 7 For motor excitation 36667.0 38664.6 ï¼1997.6 8 IF power supply 36580.0 31692.0 4888.0 9 DC drive 36194.0 61302.3 -25108.3 10 Cascade speed regulating power supply 9610.0 420.0 9190.0 11 High voltage rectified power supply 8674.0 8700.4 ï¼26.4 12 Plating power 4763.6 14921.1 -10157.5 13 Floating charging source 4371.3 6128.6 ï¼1757.3 14 General industrial use 3870.7 11129.7 ï¼7259.0 15 Soft starter 3850.6 3487.0 363.6 16 Special Purpose 3295.0 6222.5 -2927.5 17 power plug 2185.1 12488.6 -10303.5 18 Nickel cadmium battery power 1280.0 2549.3 ï¼1269.3 19 HVDC transmission 1037.0 0.0 1037.0 20 Closing power 1009.1 1675.4 ï¼666.3 twenty one Electric power supply 669.0 2400.0 ï¼1731.0 twenty two Explosion-proof charging power supply for mine 600.0 0.0 600.0 twenty three High frequency power supply 405.0 0.0 405.0 twenty four Power supply for film projection 174.0 259.0 ï¼85.0 25 ups 167.0 1576.0 ï¼1409.0 26 Arc welding rectifier 160.0 5219.4 ï¼5059.4 27 Fast charging power 143.0 25.8 117.2 total 2984117.8 1742031.5 1242086.3 Product Series Item (5) Arc welding high frequency inverter power supply Arc welding high-frequency inverter power supply will be greatly developed recently, and foreign products have sold more than 10,000 units in China. It is estimated that in 2 to 3 years, 200,000 to 300,000 old DC arc welding machines will be replaced, and tens of thousands of new welding machines will be put into service every year. (6) Static reactive power compensation equipment (SVC) Static reactive power compensation equipment can effectively prevent the pollution and voltage fluctuation of harmonics to the power grid, improve the power supply quality of the power grid, play a positive role in the protection of the power grid, and have great development prospects. (7) Small-capacity power electronic equipment for consumer products Small-capacity power electronic equipment for consumer products, such as electronic ballasts for electronic energy-saving lamps, rare-earth fluorescent lamps, high-pressure discharge lamps (HID) and filamentless lamps and electronic regulators for automobiles, air conditioners, and inverters for refrigerators will be electricity A new broad market for electronic products will have greater demand in the future. (8) Power electronic equipment for environmental protection Power electronic equipment for environmental protection, such as power recycling equipment, green lighting, and high-voltage electrostatic dust removal, has achieved significant economic benefits. At present, green computers and green power sources have been proposed, and a new generation of green power electronic products is rapidly developing. At present, electronic ballasts are a typical product in the high-frequency application of power electronics. Many new power electronic technologies-power factor correction (PFC), harmonic suppression, zero voltage switching, multiple protection, etc. can be used in high performance Electronic ballasts are used to improve their reliability and improve operating parameters. From the perspective of the entire power electronics industry, power electronic products are developing toward high-tech products. At present, some power electronic products such as electronic ballasts and communication power supply equipment are in fierce competition with foreign power electronic products. The price of foreign products is lower than that of domestic products. The key to domestic product problems is still "reliability". Whoever solves "reliability" will occupy the market. Especially after entering the customs, on the one hand, it has a positive effect on the export of some domestic power electronic products such as car rectifiers, module kits, electrochemical and communication power supply equipment, but at the same time it has a greater impact on national industry. In the process of in-depth reform of the economic system, the power electronics industry, like other industries, is also facing various difficulties and problems, which is inevitable. With the further deepening and improvement of economic system reform, these problems will be gradually solved. At present, due to the requirements of environment, energy and social efficiency, power electronic products are developing in the direction of high performance, intelligence, digitization, systemization and greening. Among the indicators of power electronic products, high reliability ranks first, followed by electromagnetic compatibility (EMC), power factor correction (PFC), efficiency, volume and weight. Key factor. Therefore, it is very important to improve the technological level and quality of China's power electronics industry technology and production team. From the perspective of domestic and foreign markets and the demand for power electronics technology and products in various industries, there are still good opportunities in the power electronics industry. For every enterprise, they are facing severe challenges and tests. It is believed that through this competition, China's power electronic technology and products will be greatly improved, and the gap with foreign power electronic products will be shortened. Looking ahead, the future of the power electronics industry is great. We should be confident that we will contribute to the development of China's power electronics industry and its collaboration with other industries.
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