How do energy trams work?

At present, new energy trams mostly use an on-board energy storage power supply method, and by using a single energy storage component such as batteries, or supercapacitors.

What is a hybrid energy storage system?

A hybrid energy storage system (HESS) of tram composed of different energy storage elements (ESEs) is gradually being adopted, leveraging the advantages of each ESE. The optimal sizing of HESS with a reasonable combination of different ESEs has become an important issue in improving energy management efficiency.

What is a hybrid energy storage system in Guangzhou Haizhu Tram?

The optimal HESS has less mass, size, cost and minimum charging state than original one in Guangzhou Haizhu tram. A hybrid energy storage system (HESS) of tram composed of different energy storage elements (ESEs) is gradually being adopted, leveraging the advantages of each ESE.

How much energy does a tram use?

The greater the distance between stations, the greater the demand energy. The first interval has the largest distance and maximum energy consumption. If the recovered braking energy is not included, the energy consumption is 7.012 kwh. Fig. 3. DC bus demand energy curve. The tram adopts the power supply mode of catenary free and on-board SESS.

How does a supercapacitor improve the battery life of a tram?

Wang et al. comprehensively considered the characteristics of the tram HESS, line conditions, and traction characteristics, took the mass of the supercapacitor as the optimization goal, optimized the parameters, and extended the battery life while reducing the mass of the ESS.

How to obtain optimal energy storage elements in Guangzhou Haizhu Tram?

An improved PSO algorithm with competition mechanism is developed for obtaining the optimal energy storage elements. The optimal HESS has less mass, size, cost and minimum charging state than original one in Guangzhou Haizhu tram.