Abstract

In this paper, we develop a novel approach for electrical daily management of subway station ventilation applied"br" to a microgrid. Piston effect caused by the train air pressure is modelled. It is integrated into the control strategy"br" in order to improve the motor speed’s dynamic characteristics. The air flow control is emulated on a laboratory"br" experimental test bench."br" The main purpose of the paper is the speed control of the ventilation by considering different external data (Air"br" quality, temperature…) and without reducing the equipment lifetime. For achieving it, two control strategies are"br" necessary: High-level control and Low-level control."br" The high-level control is an airflow input control considering external data, this input is converted into rotational"br" speed according to the fan characteristics. The motor speed is controlled in function of this input."br" The low-level control takes back the high level-control in order to improve the motor dynamics for high"br" frequency."br" A piston effect, due to the forced-air flow inside a tunnel or shaft caused by moving trains, disturbs the"br" ventilation control. The piston effect is seen like a resistive torque by the system and is taken into account in the"br" high-level control strategy. The air flow control dynamic is reproduced on a laboratory test bench at reduced"br" scale.