In order to address the issue of network voltage fluctuations and energy wastage caused by the frequent traction and braking of urban trains,a charging and discharging control strategy based on the DC side voltage of the traction network is proposed for the flywheel energy storage system applied in urban rail transit.The average speed control method is used to adjust the speed difference of the flywheel array due to different processes and environments.On the basis of the existing control strategy,a no-load voltage identification algorithm is proposed to prevent flywheel malfunctions due to voltage fluctuations in AC medium-voltage power network.Finally,taking the Fangshan Line of Beijing Metro as an example,modeling and simulation analysis were conducted on the traction power supply system with flywheel energy storage system,and on-site experiments were also carried out.The research results show that after applying the flywheel,the difference value between the peak and valley voltage of the traction network decreased by 33.2%,the output energy of the traction substation has been reduced by 23%,verifies the feasibility of the control strategy and the energy-saving effect of the flywheel energy storage system,providing reference for the further application of the flywheel energy storage system in the field of urban rail transit.
urban rail transitflywheel energy storagecontrol strategyregenerative brakingaverage speed control
NETL
NSTL
万方数据
维普
