EMS of Electric Vehicles using LQG Optimal Control

This paper proposes a strategy of a frequency separation-based coordinating power sources within offgrid applications. One of the application is an electric vehicle equipped with two power sources that is ultracapacitor (UC) and a battery, the interaction problem between can be formulated and solved as a linear quadratic Gaussian (LQG) optimal control problem. The two power sources that is battery and ultracapacitor are controlled according to their respective frequency range of specialization to share the stochastically variable load therefore the main source battery supplies the required power for low-frequency variations, whereas ultracapacitor supplies power for high-frequency. The system chosen for applications should be bilinear; the system can be modelled as linear parameter varying system. The entire operating range is designed and coupled with a gain-scheduling structure based on LQG optimal control structure this is done by using MATLAB simulation.