Advancing Motor Frequency Conversion Experts Conspiracy for Energy Efficiency

Introduction: In recent years, on the basis of updating and rebuilding single machines, the energy-saving engineering of motor systems has achieved effective progress in the work of systematic adjustment methods based on frequency conversion and speed adjustment to improve operating efficiency, but in the environment of vigorously developing green economy, its advancing efforts And progress is still insufficient and lacking.

“There is still a huge space for energy-saving transformation of the motor system. The potential for energy saving needs to be fully tapped.” October 14th was the World Standardization Day. At the International Seminar on Frequency Conversion and Energy Saving and Emission Reduction of Motor Systems held on that day, it came from relevant government departments, standardization agencies, More than one hundred experts from domestic and foreign industry associations, as well as manufacturers and users, made in-depth discussions on the status quo after they had in-depth exchanges. At the same time, they believed that “the work of improving the overall operational efficiency of China’s electrical systems is a long-term task.”

The potential for energy conservation is huge. The advancement of energy conservation in the motor system of China's "ten key energy conservation projects" is in the ascendant. "Lower energy consumption" and "improved efficiency" have become common keywords in recent years in the motor industry.

The industry believes that in recent years, on the basis of updating and transforming single machines, the motor system energy-saving projects have achieved effective progress in the system-based adjustment of frequency conversion to improve operating efficiency, but in the environment of vigorously developing a green economy, it has promoted The intensity and progress are still insufficient and lacking.

As we all know, the motor system is an important industrial energy consumption device. Data from industry associations shows that in 2010, the total installed capacity of various types of electric motors in China was approximately 1.2 billion kilowatts, and the annual power consumption was approximately 2.5 trillion kilowatt-hours (calculated according to an average of 2000 hours per year), which accounted for the proportion of electricity consumption in the entire society. More than 60%. For this reason, the energy-saving work of the motor system is listed as an important part of China's "Mid-term Energy Conservation Plan" and "Top Ten Key Energy Conservation Projects."

As an important energy-saving technology, the frequency conversion of motor systems is widely recognized and promoted by domestic and foreign counterparts due to its remarkable energy-saving effect and short investment return period. According to Sun Xiaokang, deputy director of the National Standardization Management Committee, "Compared with traditional fixed-speed motors, motor systems can reduce energy consumption by up to 30% after frequency conversion."

In view of this, the people in our industry are actively implementing it. According to Sun Xiaokang, during the “Eleventh Five-Year Plan” period, on the basis of updating and reconstructing single equipment, the relevant departments focused on promoting system adjustment methods based on variable frequency speed control to improve the system operating efficiency, forming 36 billion kwh/year over five years. Energy-saving ability.

Looking at the national industrial operation situation, the overall development trend of China's motor industry has become better. At present, it has become a major motor producer and exporter. In recent years, the promotion of motor system energy saving work has also shown initial results. The industry generally believes that it still has "great potential".

According to the relevant plans, during the “12th Five-Year Plan” period, the average operating efficiency of China's motor systems will be increased by 2 to 3 percentage points on the basis of the current situation, resulting in a power saving capacity of 80 billion kwh/year. Experts predict that the national motor system is expected to achieve 400 billion kWh/year of energy-saving capacity.

This means that the effective implementation of the frequency conversion speed regulation of the motor system will become a key move in the future.

30% lower efficiency than abroad

According to reports, China's current motor system operating efficiency is generally low, high energy consumption. "Compared to the international advanced level, it is 20% to 30% lower." This analysis comes from Xiong Huawen, deputy director of the Energy Efficiency Center of the Energy Research Institute of the National Development and Reform Commission.

The cause of the low efficiency of the motor system is the cause. He believes that the two major problems have spread across the board. "One is that the efficiency of the motor and the dragged device itself is low; the second is that the system is not properly matched and adjusted, resulting in low system efficiency." At present, the motor used in our country is mainly the Y series motor popularized in the 1980s and a considerable part of the JQ2 series motor, and its efficiency is 2 to 3 percentage points lower than that of the Y2 series motor. Combined with the backwardness of equipment such as fans and pumps, the efficiency of the unit itself is 3 to 5 percentage points lower than that of developed countries.

In addition, "the big horse-drawn car is serious." For a long time, due to the poor reliability of the equipment and the backward design philosophy, many users consider that the safety factor is too large in the selection and generally take a margin of 10% to 15%. In addition, the motor and the dragged equipment have less specifications and have a large gap between the grades. When the actual type is selected, they are generally high, causing the installed capacity of the system to be much higher than the actual requirement. As a result, many equipment systems operate in the low load area for a long period of time, resulting in great waste.

"It is of great significance to remanufacture a stock of inefficient motors into high-efficiency motors." Chen Weihua, secretary-general of the Small and Medium Motors Branch of the China Electrical Equipment Industry Association, analyzed that China has about 1.5 billion kilowatts of electric motors, and it has only reached 30 million kilowatts in Shanghai alone. Among them, most of them are ordinary low-efficiency motors, and huge amounts of inefficient motors are not replaced and replaced. There is a huge gap in the goal of completing energy-saving and emission reduction tasks by 2020.

Based on this, the people in the industry are deeply worried about their current situation and have a deeper understanding of the responsibilities and missions that the low-carbon economy has shouldered.

Promoting Frequency Conversion Technology and Applications During the “Twelfth Five-Year Plan” period, innovation and transformation of the motor industry presented various opportunities and challenges. In order to advance its sustained and healthy development, industry experts have offered advice and suggestions on how to tap into the potential of energy saving in motor systems and how to turn the potential into reality.

Sponsored by the China Standardization Association and the National Energy Conservation and Emission Reduction Standardization Technology Alliance, the EU Delegation to China, the China National Institute of Standardization, the Energy Conservation Service Industry Committee of the China Energy Conservation Association and Grundfos (China) Investment Co., Ltd. The 2nd International Conference on Frequency Conversion and Energy Saving and Emission Reduction of Motor Systems. The seminar focused on the analysis of the potential of frequency conversion energy conservation in China's motor systems and the exploration of the frequency conversion promotion support mechanism for motor systems.

According to Chen Weihua, “We must fully grasp the favorable opportunity for the country to develop and cultivate strategic emerging industries and promote the promotion of energy-saving engineering and high-efficiency motors in the motor system, vigorously carry out technological innovations and business innovations, and accelerate the structural adjustment and change of development methods.”

Yang Cheng, Chairman and General Manager of Hebei Electric Machinery Co., Ltd., said that it is necessary to give play to the role of science and technology support and to establish the economic growth of the motor industry in the constant optimization of product structure. He believes that the further development of motor energy conservation "is not only to vigorously promote the development of variable frequency technology, but also to promote the application."

“It is an important task to properly guide users to rational use of energy-saving frequency conversion technology.” As the sponsor and main support organization of the conference, the Danish Grundfos Group is the world's largest pump manufacturer and needs a large number of motors every year. Over the years, the Group has been adhering to the principles of promoting energy conservation and emission reduction, developing a low-carbon economy, and promoting sustainable development, and has promoted energy-saving work for electric motors. Yan Jianya, director of public affairs of Grundfos China, made it clear that “to promote energy-saving and emission reduction is not only to pay attention to R&D and technical innovation of motor manufacturing enterprises, but also to guide users is an important task”.

According to Yan Jianya, users currently use energy-saving motors that have blind areas, such as unreasonable system design matching, resulting in unnecessary waste; one-sided view that variable frequency motor prices are high, and lack of scientific estimates of the motor's full life cycle efficiency and effectiveness. He believes that narrowing the gap between China's motor system and the world average energy efficiency requires multiple efforts. “Making a contribution to China’s energy-saving emission reduction and low-carbon economic construction is based on Grundfos’ consistent corporate values ​​of responsibility, vision, and innovation. Grundfos hopes to pass the China Standardization Association and the national energy conservation and emission reduction standardization. The technical alliance will use our experience in energy efficiency in the pump field and will continue to spare no effort to promote the scientific frequency conversion of the motor system and promote the development of a low-carbon economy in the entire society."

Participating experts at home and abroad also expressed opinions on how to speed up the revision of energy efficiency standards for motor systems, how to identify energy conservation effects, and other issues of concern in the industry, and conducted useful discussions.