Study of power estimation and competitive electrical power management in LEV based on Gray model GM(1, n)

ABSTRACT

In this paper, a new electrical power management system is proposed for light electric vehicles (LEV). The main power sources are lithium battery and proton exchange membrane fuel cell (PEMFC). According to the gray theory, the gray model is used for power evaluation, which will help the competitive electrical power management system to make a good switching. Then, the powers of Li-battery and PEMFC can compare each other and share its power by switching way which can achieve the objective of power management more efficiently. The parameters of LEV are voltage, current and power. The performance of lithium battery and PEMFC should be tested before designing the LEV power management system. The result shows that the proposed competitive electrical power management system can provide power continuously until the fuel is burnt out, and good power management performance is demonstrated.

KEYWORDS:

• Competitive electrical power management
• LEV
• PEMFC
• Gray Model GM (1 n)
• Lithium battery

Acknowledgement

The authors would like to acknowledge the financial support from the National Science Council of Taiwan under Grant NSC 99-2221-E-270-009.