Comprehensive Evaluation Method of Energy-saving Effect for Frequency Conversion System Based on Total Harmonic Components

  • Cao Ying School of Mechanical Science and Engineering, Northeast Petroleum University, 163318, Daqing, China
  • Li Hui Energy-saving Technology Monitoring and Evaluation Center of CNPC, No.552 Xibin Road, Daqing, 163453, China
  • Xu Xiu-fen School of Mechanical Science and Engineering, Northeast Petroleum University, 163318, Daqing, China
  • Ge Yong-guang Xinjiang Oilfield Company Experiment and Detection Research Institute of CNPC, No. 29 Junggar Road, Karamay, 834000, China
Keywords: Frequency conversion system, energy-saving indicators, total harmonic components, energy-saving effect, comprehensive evaluation, weighted matrix

Abstract

With the development and application of frequency conversion technology, the types of frequency conversion equipment are becoming more and more diverse, and the corresponding energy efficiency testing and evaluation methods are different, which leads to inconsistencies in the selection of equipment and the operation analysis and evaluation of the frequency conversion system. It is urgent to find an effective solution. By analyzing the problems of the current energy-saving test and evaluation methods of the frequency conversion system, the energy-saving evaluation index system and calculation method based on the total harmonic components are proposed. Establish a harmonic evaluation index system covering 9 indicators. On this basis, 6 core harmonic indicators are selected, and the comprehensive harmonic influence coefficient and weight matrix are introduced to establish a comprehensive evaluation method for energy-saving effects based on harmonic total components and weighted matrix model. On this basis, 15 different working conditions of the energy-saving test and analysis evaluation experiments for of frequency conversion system have been carried out. The results show that the total harmonic components analysis method proposed in this paper can reflect the energy efficiency level of the frequency conversion system and its equipments more realistically on the premise of meeting the analysis and actual operation requirements on site. At the same time, the established comprehensive evaluation method of energy saving effect can comprehensively and reasonably analyze the impact of harmonics on the performance of the frequency conversion system. In addition, it provides theoretical guidance for reasonably determining the optimal operating conditions of the system and equipment, and taking corresponding harmonic prevention measures to effectively improve the quality of power transmission and the actual energy-saving effects of frequency conversion technology.

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Author Biographies

Cao Ying, School of Mechanical Science and Engineering, Northeast Petroleum University, 163318, Daqing, China

Cao Ying received the bachelor’s degree in automation from Shanghai Maritime University in 2008, the master’s degree in power electronics and power transmission from Northeast Petroleum University in 2011, and the philosophy of doctorate degree in Oil & Gas Engineering from Northeast Petroleum University in 2016, respectively. She is currently working as a Lecturer at the School of Mechanical Science and Engineering, Energy-saving Research and Development Center, Northeast Petroleum University. Her research areas include power electronics, fault diagnosis, oil & gas field energy-saving technology research, standardization management, energy management and policy research. Since 2011, she has been the Secretary of the National Oil and Gas Standardization Technical Committee - Energy and Water Saving Technical Committee of Oil and Gas Field (SAC/TC355/SC11). She is the author of four books, more than 20 articles, and more than 20 standards.

Li Hui, Energy-saving Technology Monitoring and Evaluation Center of CNPC, No.552 Xibin Road, Daqing, 163453, China

Li Hui received the bachelor’s degree in Petroleum Engineering from Daqing Petroleum Institute in 2008, the master’s degree in Oil & Gas field development engineering from Northeast Petroleum University in 2011. He is currently working as an engineer and deputy director in the Daqing Oilfield Energy Conservation Technology Monitoring and Evaluation Center of CNPC. His research areas include energy consumption monitoring of key energy-consuming equipment in oil & gas fields, research and application of energy-saving technologies for key energy-using systems in oil & gas fields, energy audit and energy saving review.

Xu Xiu-fen, School of Mechanical Science and Engineering, Northeast Petroleum University, 163318, Daqing, China

Xu Xiu-fen received the bachelor’s degree in petroleum mining machinery from Daqing Petroleum Institute in 1992, the master’s degree in petroleum mining machinery from Daqing Petroleum Institute in 1995, and the philosophy of doctorate degree in electromechanical engineering from Harbin Institute of Technology in 2005, respectively. She is currently working as a Professor at the School of Mechanical Science and Engineering, Energy-saving Research and Development Center, Northeast Petroleum University. Her research areas include mechatronics, energy-saving technology research in oil and gas fields, standardized management. Since 2013, she has been the Secretary General of the National Oil and Gas Standardization Technical Committee - Energy and Water Saving Technical Committee of Oil and Gas Field (SAC/TC355/SC11).

Ge Yong-guang, Xinjiang Oilfield Company Experiment and Detection Research Institute of CNPC, No. 29 Junggar Road, Karamay, 834000, China

Ge Yong-guang received the bachelor’s degree in electrical engineering and automation from North China Institute of Water Conservancy and Hydropower in 2005. He is currently working as a Senior Engineer and Director at the Experiment and Detection Research Institute, PetroChina Xinjiang Oilfield Company. His research areas include electrical automation, energy-saving monitoring and management, intelligent testing technology and method research.

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Published
2021-07-10
Section
Renewable Power and Energy Systems