The energy storage device composed of the circuit breaker motor energy storage and the power grid access device composed of power electronic components become the two major parts of the energy storage system. The energy storage device mainly realizes energy storage, release or fast power exchange. The grid access device realizes two-way transmission and conversion of energy between the energy storage device and the power grid, and realizes functions such as power peak shaving, energy optimization, power supply reliability, and power system stability.
The energy storage system of the circuit breaker energy storage motor has a wide capacity range from tens of kilowatts to several hundred megawatts; the discharge time span is large, from millisecond to hour; the application range is wide, and the whole power generation, transmission, distribution, Power system.
Energy storage methods commonly used in circuit breaker energy storage motors
At present, energy storage technologies mainly include physical energy storage (such as pumped storage, compressed air energy storage, flywheel energy storage, etc.), chemical energy storage (such as various types of batteries, renewable fuel cells, flow batteries, supercapacitors, etc.) and Electromagnetic energy storage (such as superconducting magnetic energy storage, etc.).
The most mature and most commonly used in physical energy storage is pumped storage, which is mainly used for peak shaving, valley filling, frequency modulation, phase modulation, and emergency backup of power systems. Pumped storage can be released from a few hours to a few days, with energy conversion efficiencies ranging from 70% to 85%.