Energy storage system utilizing large-capacity electric double-layer capacitors for peak-cut of power demand

✍ Scribed by Shigeyuki Sugimoto; Isao Kouda; Yoshihiro Murai

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 220 KB
• Volume: 133
• Category: Article
• ISSN: 0424-7760
• DOI: 10.1002/1520-6416(20001130)133:3<83::aid-eej10>3.0.co;2-a

✦ Synopsis

Recently, due to a rapid increase of demand for air conditioning in summer, peak power demand is becoming increasingly acute. Therefore, the load factor has a tendency to drop every year. The drop of the load factor is leading to a drop in the utilization factor of the power facilities and an increase in the cost of installation.

In this paper, we propose an energy storage system for peak-cut of power demand, in which we use large-capacity electric double-layer capacitors. This energy storage system has some distinctive characteristics, including long life span, maintenance-free operation, preservation of environment, high efficiency at charge/discharge, and so on.

This paper deals with the circuit arrangement of the proposed energy storage system, the charge equalization method of the capacitors, and the control method of the converter at charge/discharge. Finally, the operating characteristics of this system are evaluated by simulation analysis.