On May 22, 2015, sponsored by the Power Electronics Branch of China Electrical Equipment Industry Association, and co-organized by Dayu Electric Technology Co., Ltd. and Emerson Network Energy Co., Ltd., the "Ultra High Power Frequency Conversion Soft Start Application Technology Exchange Conference" was grandly held in Xi’an, China Mr. Lu Jianqiu, Chairman of the Power Electronics Branch of the Electrical Equipment Industry Association/Director of Xi’an Power Electronics Research Institute, Mr. Wang Yihua, Chairman of Dayu Electric Technology Co., Ltd., and Mr. Ding Qigang, Vice President of Emerson Network Energy Co., Ltd. delivered speeches. More than 100 industry experts across the country Gather in the ancient city and talk about the future of the power electronics industry.

Cheng Shiguo, Vice Chairman of Dayu Electric Technology Co., Ltd. presided over the meeting. He pointed out: The macro economy continues to be sluggish and the traditional manufacturing industry is in trouble. Only by maintaining "innovation, cooperation and confidence" can pressure be turned into motivation. Turn challenges into opportunities. This conference originated from the successful operation of the 30000kW ultra-high-power synchronous motor variable frequency soft start device of Shaanxi Longgang Group, which was integrated by Dayu Electric System and provided by Emerson. This innovative technology application not only brings new ideas to the industry, but also brings new ideas to entrepreneurs.

　　Mr. Lu Jianqiu gave a speech first. He recalled that since the establishment of the Power Electronics Branch of the China Electrical Equipment Industry Association in 1989, the branch is based on the industry, is committed to the development of China’s power electronics industry, and serves member companies well. He has repeatedly hosted new technologies and new products similar to power electronics. promoting event. Mr. Lu Jianqiu spoke highly of the 30,000kW ultra-high-power synchronous motor variable frequency soft starter jointly developed by Dayu Electric and Emerson, saying that this is an outstanding achievement of enterprise technological innovation. The strategic cooperation between the two parties' exhibition directors has provided valuable for the development of the industry. experience. Dayu Electric has made great contributions to the research and development of large-scale, localized, and ultra-high-power soft-start equipment. Emerson has a strong technical strength in frequency conversion research and development. The stable and efficient start of large-scale equipment effectively reduces the impact on the power grid and equipment. , The vigorous promotion of this technology will play a very good role in promoting the realization of "Made in China 2025".

　　Mr. Wang Yihua bowed three times to express his sincere gratitude: one bow to the association, thanks to the association for connecting equipment suppliers and customers, and increasing opportunities for exchanges and cooperation; two bows to Longgang, MCC Nanfang, and Shaangu, as the users, The designer and supporting party dare to innovate technology and use domestic integrated system products; three bows to the majority of users, so that the value of Dayu's products can continue to be reflected, and also thank Emerson for the support and help of Dayu. Mr. Wang Yihua explained the origin of the Dayu brand—learning Dayu’s spirit of water management, forging ahead and climbing peaks bravely, and recalled Dayu’s “East Wind” that took advantage of the opportunity to reform and gradually deepened. With the enthusiasm for entrepreneurship and the passion to endure hardships The development process from nothing to something. In 2014, Dayu's soft starter segment was listed on the New OTC Market and won China's well-known trademark; the brand won the honor of China's top ten soft starter brands, leading the industry in the ultra-high-power market share, and its performance and service have been recognized by customers. Mr. Wang Yihua introduced that since the cooperation with Emerson in 2013, Dayu Electric has used its rich experience in the market for nearly 20 years, combined with Emerson’s leading R&D level and technical strength, and the two parties have carried out resource integration and in-depth cooperation. The power soft starter successfully operated stably, setting a model for the promotion of new technologies. Mr. Wang Yihua said that his 25 years of experience in soft start has strengthened his confidence in soft start. In the future, he will increase investment in new variable frequency soft start applications and make greater contributions to the large-scale and intelligent soft start equipment. Contribution.

　　Mr. Ding Qigang introduced in the guest speech that Emerson, as a century-old industrial electrical shop with a history of 125 years, has long focused on high-end automation control applications such as frequency conversion devices, has a high-end R&D and test platform, and implements strict process control standards and design procedures. It has accumulated rich experience in a wide range of applications and is a reliable partner. He thanked Dayu Electric’s bold innovation and gave Emerson the opportunity to participate in the technical transformation project of Longgang’s 4500 cubic meter blast furnace system, jointly saving resources, optimizing production processes, releasing process potential, optimizing equipment supporting, and stabilizing the production system for Longgang. Make suggestions. "Emerson is willing to use its technology platform and R&D strength to work with partners to help customers solve problems and pain points in process improvement and energy saving."

　　Mr. Li Chongjian, chief engineer of Metallurgical Automation Research and Design Institute and chairman of Beijing Power Electronics Society, gave an opening speech, expressing important views on "the current situation and development of high-power power electronic converters". He analyzed the trend of devices promoting the development of high-power frequency conversion, the development trend of high-performance frequency conversion based on IGBT, and the development direction of high-power frequency conversion modularity. Looking back on the development process of domestic soft start, Mr. Li Chongjian spoke highly of the 30,000kW high-power soft start device jointly developed by Dayu Electric and Emerson, and believed that the device is a very important innovation for the steel industry. Congratulations to Dayu Electric and Emerson has made outstanding achievements in the soft start of blast furnace blowers, which are key equipment in the steel industry.

　　Mr. Gao Feng, a senior engineer of Shaanxi Longgang Group Corporation, said "The application of ultra-high power frequency conversion soft start in Longgang", from the user's point of view, affirmed the good cooperation between Dayu Electric and Emerson, and the module series connection mode frequency conversion soft start is convenient for debugging. , Less than a week of commissioning time, a successful one-time start, which is rare in the industry; affirmed the advantages of Emerson inverters such as instantaneous power failure and non-stop, automatic speed tracking start, multi-speed operation, etc., with high reliability, high performance, and high efficiency , Easy to debug, easy to operate, easy to maintain outstanding advantages.

　　The speech at the conference was wonderful: Ms. You Hairong, chief engineer of MCC Southern Electric Power Electronics, gave a special speech on "Design and Application of Frequency Conversion Soft Start for Longgang No. 5 Blast Furnace Fan Station", and affirmed the series frequency conversion softener of voltage source module from the design point of view. The starting area is small, the cable and interface connection is convenient, and the debugging is simple and convenient; Mr. Xuefan Wang, professor and doctoral tutor of the School of Electrical and Electronic Engineering of Huazhong University of Science and Technology, gave a speech on "Brushless Double Cabinet Frequency Conversion Speed ​​Control Technology" and introduced low voltage frequency conversion control The most cutting-edge technology of high-voltage motors; Mr. Wu Shanye, Technical Director of Xi’an Shaangu Automation and an expert on government subsidies from the State Council, gave a speech on "Application of Variable Frequency Soft Start Supporting Fan Starting Technology". At the same time, it also talked about equipment manufacturers’ issues from the perspective of system integration. Participants benefited a lot from the cooperation model.

　　Mr. Xiao Xiangfeng, a professor-level senior engineer and the executive vice chairman of the Power Electronics Branch of the China Electrical Equipment Industry Association, spoke concisely and introduced the branch’s unremitting efforts in the industrialization and disciplinaryization of power electronics since its establishment in 1989, making the industry bigger and stronger, and the economy Make more contributions to construction, national economy and people's livelihood. He has written suggestions to the State Council three times and received great attention from the Premier of the State Council. Since 2007, relevant government departments have issued a number of plans and special funds to support the development of power electronics technology and industries. Xiao Lao strongly appealed for healthy competition, standardized market behavior, and abandon low-price competition. He agreed that enterprises should be guided by technological innovation. He praised the technological innovation of the 30,000kW ultra-high-power synchronous motor variable frequency soft starter jointly developed by Dayu Electric and Emerson. Call on companies to take the Made in China 2025 and Industry 4.0 as the direction, to be guided by national policies, and to be good at taking advantage of policy opportunities. Xiao Lao followed good guidance, frequently cited examples, and inspired his colleagues in the industry.

　　Mr. Jiang Liuxing, Director of Medium Voltage Inverter Product Department of Emerson Network Energy Co., Ltd. gave a speech on "Application of Medium Voltage Inverter in Longgang Blast Furnace Fan Soft Start". At present, there are 305 iron-making and steel-making enterprises that meet the "Iron and Steel Industry Standard Conditions (Revised in 1012)", including 951 iron-making blast furnaces with an iron-making capacity of 930 million tons; 198 steel-making electric furnaces with a steel-making capacity of 120 million tons ; Great potential for energy-saving renovation. Combined with the successful operation of Longgang's ultra-high-power variable frequency soft starter, he introduced Emerson's medium-voltage variable-frequency technology and product characteristics, focusing on the principle and method of phase-locking technology of medium-voltage inverters, which can achieve no difference (precise) simultaneous switching , There is no disturbance in the switching process. And combined with the market situation to analyze the development trend of high-power load starting in the steel industry: from water resistance to solid soft start, and finally to frequency conversion soft start.

　　Mr. Wei Hongqi, Secretary General of the Power Electronics Branch of the China Electrical Equipment Industry Association, gave a speech on "Power Electronics Standardization", categorizing the current 152 standards (including 69 national standards, 2 national military standards and 81 industry standards) into 8 major categories 29 sub-categories show the national standards closely related to motor soft start.

　　Mr. Ning Guoyun, deputy general manager of Dayu Electric Technology Co., Ltd. gave a speech on "Large Synchronous Motor One Drive Two Frequency Conversion Starter". Starting with the principle of frequency conversion soft start, he introduced the frequency conversion soft start technical plan and frequency conversion soft start debugging method Steps, and make analysis and explanation of starting characteristics. Taking the Longgang project as an example, combined with personal participation in the original program design, system integration, and on-site commissioning process, a vivid analysis was carried out. The detailed data and professional explanations aroused the attention of the participating experts.

　　After the intensive speech session, the audience was still not satisfied, and the organizer specially arranged an interactive time. Mr. Xiao Xiangfeng, Chairman of the Power Electronics Branch of China Electrical Equipment Industry Association, Mr. Li Chongjian, Chief Engineer of Metallurgical Automation Research and Design Institute, Mr. Zhu Gang, Senior Engineer of Shaangu Automation, Ms. You Hairong, Chief Engineer of MCC Southern Electric Power Electronics, Dayu Electric Technology Co., Ltd. Deputy General Manager Mr. Ning Guoyun and Mr. Meng Hui of Emerson Network Energy Co., Ltd. discussed with experts and engineering technicians on site, and discussed the branch, direction and mainstream of frequency conversion starting technology. The experts will answer the common concerns of the industry such as the research and development, production, and sales of domestic IGBTs, the process steps of engineering design, the Chinese creative characteristics of Made in China 2025 for frequency conversion, and system integration engineering design.

　　At the end of the meeting, Dayu Electric presented a splendid dinner and a rich evening program for the guests. Being like-minded, talking about wine and thinking about the future is a joy in life!

　　Postscript: The next day, visit the main motor of Shaanxi Longgang Group's blast furnace fan (30000kW super-power synchronous motor) frequency conversion soft starter