Application Research of Flywheel Energy Storage Technology in Dynamic Characteristic Detection of Circuit Breaker

The circuit breaker closing and energy storage is an important technical guarantee in the structure of the rail transit power supply system. Its function is to absorb excess energy in the feedback loop from the train to the rectifier system. Traditional circuit breakers closing rely on DC motor tension springs for energy storage-significant energy loss in DC control circuits and equipment's internal components. Firstly, analyze the characteristics and curve operation rules of the flywheel energy storage array (FESA). Secondly, the flywheel energy storage array is applied in the dynamic monitoring method of circuit breakers for the recovery of regenerative energy during train braking, It has important implications for meeting energy conservation and voltage regulation requirements. Finally, a magnetic field model is established through the cyclic parameter changes of permanent magnet synchronous motor (PMSM), experimental evidence shows that flywheel energy storage arrays are more energy-efficient than battery packs or super capacitors in subway systems. It has high instantaneous power, high energy storage density, and slow operational response attenuation, convenient management of state of charge, and balanced charging and discharging.