At present, with the development and progress of science and technology, social productivity is constantly improving, and the role of frequency conversion technology in coal mine mechanical and electrical equipment co...At present, with the development and progress of science and technology, social productivity is constantly improving, and the role of frequency conversion technology in coal mine mechanical and electrical equipment control is becoming more and more obvious. Frequency conversion technology has the advantages of regulation and control, etc. The application of this technology in mines can promote the production efficiency of transportation and ventilation. Frequency conversion technology is widely used in modern life. Applying frequency conversion technology to mining equipment in modern coal mine mechanical and electrical engineering can ensure the smooth operation of mechanical and electrical equipment to a great extent. Therefore, this paper will focus on the application of frequency conversion technology in modern coal mine electromechanical engineering.展开更多
Fracturing equipment is the core device in shale gas reservoir stimulation.As domestic shale gas exploration and development steps into deep layers,the development of fracturing technology puts forward higher requirem...Fracturing equipment is the core device in shale gas reservoir stimulation.As domestic shale gas exploration and development steps into deep layers,the development of fracturing technology puts forward higher requirements for relevant equipment.Electric drive is an important devel-opment direction of fracturing equipment technology.In this paper,the technical progress of electric drive fracturing equipment in China and abroad was investigated.It is shown that a high-power frequency conversion system is the key technology to determine the performance of electric drive fracturing equipment.After the adaptability of the high-power frequency conversion technology to electric drive fracturing equipment was analyzed,based on the fracturing operation of Model 2500 electric drive fracturing trucks in the Weiyuan Block of the Sichuan Basin for shale gas reservoir stimulation,electric drive and diesel-driven fracturing equipment were comparatively analyzed from the aspects of economic and technical in-dicators.And the following research results were obtained.First,compared with a diesel-driven fracturing truck of the same power,an electric drive fracturing truck can realize a full power coverage and a continuous adjustment of output displacement,and can better meet the operation re-quirements of fracturing process for a precise control of the pumping displacement,while reducing the power cost by 68%and the equipment purchase cost by 10e20%.Second,compared with the skid mounted equipment,an electric drive fracturing truck has a better transport performance,being suitable for the fracturing well sites with poor road conditions,such as loess gullies,hills and mountains.It is suggested that the following development direction of the electric drive fracturing equipment should focus on the improvement of single machine power density.In addition,it is recommended to enhance the basic studies on high-pressure and high-power semiconductor devices and make a good plan for the power demand of shale gas platform construction in advance,so as to give a better play to the operating cost advantage of electric drive fracturing equipment.展开更多
文摘At present, with the development and progress of science and technology, social productivity is constantly improving, and the role of frequency conversion technology in coal mine mechanical and electrical equipment control is becoming more and more obvious. Frequency conversion technology has the advantages of regulation and control, etc. The application of this technology in mines can promote the production efficiency of transportation and ventilation. Frequency conversion technology is widely used in modern life. Applying frequency conversion technology to mining equipment in modern coal mine mechanical and electrical engineering can ensure the smooth operation of mechanical and electrical equipment to a great extent. Therefore, this paper will focus on the application of frequency conversion technology in modern coal mine electromechanical engineering.
基金Project supported by CNPC's Major Engineering Technology Field Test Project“Integration and field test of online monitoring system of Model 7000 electric fracturing skid and diesel-driven fracturing unit”(No.:2019F-30)Shaanxi Province Postdoctoral Science Foundation Project“Research on key technologies of intelligent control system of electric drive fracturing device”(No.:2018BSHQYXMZZ04).
文摘Fracturing equipment is the core device in shale gas reservoir stimulation.As domestic shale gas exploration and development steps into deep layers,the development of fracturing technology puts forward higher requirements for relevant equipment.Electric drive is an important devel-opment direction of fracturing equipment technology.In this paper,the technical progress of electric drive fracturing equipment in China and abroad was investigated.It is shown that a high-power frequency conversion system is the key technology to determine the performance of electric drive fracturing equipment.After the adaptability of the high-power frequency conversion technology to electric drive fracturing equipment was analyzed,based on the fracturing operation of Model 2500 electric drive fracturing trucks in the Weiyuan Block of the Sichuan Basin for shale gas reservoir stimulation,electric drive and diesel-driven fracturing equipment were comparatively analyzed from the aspects of economic and technical in-dicators.And the following research results were obtained.First,compared with a diesel-driven fracturing truck of the same power,an electric drive fracturing truck can realize a full power coverage and a continuous adjustment of output displacement,and can better meet the operation re-quirements of fracturing process for a precise control of the pumping displacement,while reducing the power cost by 68%and the equipment purchase cost by 10e20%.Second,compared with the skid mounted equipment,an electric drive fracturing truck has a better transport performance,being suitable for the fracturing well sites with poor road conditions,such as loess gullies,hills and mountains.It is suggested that the following development direction of the electric drive fracturing equipment should focus on the improvement of single machine power density.In addition,it is recommended to enhance the basic studies on high-pressure and high-power semiconductor devices and make a good plan for the power demand of shale gas platform construction in advance,so as to give a better play to the operating cost advantage of electric drive fracturing equipment.
