Review of Development Trend of Transportation Energy System and Energy Usages in China Considering Influences of Intelligent Technologies

Abstract

With the continuous development of intelligent transportation technologies, new ways of energy usage in transportation continue to emerge, which puts forward new requirements for the planning and design of energy systems. However, comprehensive analyses on the characteristics of transportation energy systems and the development trend of energy usage patterns brought by intelligent technologies have rarely been carried out so far. This paper explores this subject by reviewing the recent development and utilization of intelligent technologies in the transportation system and its impacts on energy usage. This review is carried out from three aspects, covering the representative intelligent transportation and energy technologies on vehicles, infrastructures and systems. The scope is limited within road, railway and water transport domains, with a focus on the recent developments in China as a representative. In terms of vehicles, the development trend of the power systems for new energy vehicles, the characteristics of energy usages in electric vehicles and the effects on energy saving and emission reduction are summarized. In terms of infrastructures, new technologies on smart road, smart port, intelligent railway energy system and the usage of clear energy on electric grid for transportation are reviewed, with the consideration of their potential influences on energy usages and the energy consumption characteristics of typical facilities also being analyzed. As for the transportation system, this review has focused on intelligent and connected transportation systems, train control and autonomous systems, and intelligent shipping system, with the emphasis on the energy saving and emission reduction effects of applying these intelligent technologies. The overall development trend of the transportation energy system is then analyzed based on the above materials, in particular, the future energy usage patterns in transportation system are given and the major challenges and obstacles approaching the future scenarios are also identified.

Power Measurement Using Adaptive Chirp Mode Decomposition for Electrical Vehicle Charging Load

“…where • 2 denotes L 2 norm, (•) denotes the second derivative, two terms p i (t) 2 2 and q i (t) 2 2 are used as smoothness constraints for measuring bandwidth of the signal, γ > 0 is the penalty factor, and the last term x(t) − x i (t) 2 2 denotes the residue energy after the currently estimated i-th component is eliminated.…”

“…With the enhancement of environmental protection awareness, electric vehicles have been widely used in many countries to alleviate global warming and energy crisis [1,2]. Typically, electric vehicles obtain electrical energy from the power grid through charging piles, especially direct current (DC) charging piles, whereas due to nonlinear components contained in the batteries of the electric vehicles and charging piles, the charging behavior of the electric vehicles, especially fast charging mode, brings a large number of harmonic and nonstationary signals, resulting in voltage and current distortion on the grid side of the charging piles, i.e., the voltage or current waveform is not standard sinusoidal [3].…”