Research and implementation of new-type supercapacitor and battery hybrid energy storage system
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ORIGINAL ARTICLE
Research and implementation of new‑type supercapacitor and battery hybrid energy storage system Jian Liu1 · Yang Wang1 · Yangjie Wu1 · Yang Li1 · Xiangsheng Wang2 Received: 24 February 2020 / Revised: 24 July 2020 / Accepted: 30 July 2020 © The Korean Institute of Power Electronics 2020
Abstract When a dump truck brakes, it is difficult to effectively absorb the braking energy due to the transient mutation of braking energy. At the same time, braking energy production is too high to store easily. Focusing on these problems, this paper proposes a new type of two-stage series supercapacitor and battery (SP&B) hybrid energy storage system (ESS). Using the characteristics of supercapacitors, which can charge and discharge quickly with large currents, the system combines the supercapacitors with a battery with a high energy storage capacity. This allows sudden large currents to be absorbed and released rapidly, while large amounts of energy can be stored. This system can also reduce the charge and discharge times of the SP&B to meet the working requirements of dump truck braking while improving the service life of the system. After completion of the research and implementation of the proposed SP&B hybrid ESS, a laboratory dynamic model was set up as an experimental platform and vehicle operation experiments were performed. The obtained results show that the energy recovery efficiency of the hybrid ESS can reach 53.5%, which can realize both security and stability for dump truck braking energy recovery and utilization (BER&U) systems. Keywords Battery · Braking energy · Dump truck · Super-capacitor
1 Introduction The working environment of a dump truck is harsh and its oil consumption is huge. Braking energy accounts for about 25% of a dump truck’s total energy consumption, so it is important to recycle this part of the energy [1]. BER&U systems are closely related to power conversion technology and energy storage technology. With the development of related technologies, the application of BER&U technology has become a research hotspot [2–5]. Energy storage technology forms the basis for the development of BER&U technology. In recent years, the rapid development of lead battery energy storage [6], lithium battery energy storage [7], supercapacitor energy storage [8], flywheel energy storage [9] and hybrid energy storage [10] systems, and particularly the maturation and application of
* Jian Liu [email protected] 1
School of Electrical and Information Engineering, Wuhan Institute of Technology, Wuhan, China
China Coal Pingshuo Group Co., Ltd., Pingshuo, China
2
supercapacitors, have provided new development opportunities for energy storage technology. In the BER&U field [11, 12], the Siemens SITRAS SES and the Bombardier MITRAC Energy Saver have reduced the energy consumption of rail transit vehicles by 30 to 40 percent. However, due to the capacity limitations of supercapacitors, the above schemes are only applicable to rail transit systems, where they can be charged using the grid at any tim
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