| abstract |
The invention provides an industrial user-side multifunctional electrochemical energy storage system and an operation control method, comprising: a first isolation switch, a second isolation switch, a bidirectional thyristor, a bypass switch, an LCL filter, a three-phase inverter and a an energy storage system; the external power grid, the first isolation switch, the triac, the second isolation switch and the external load are connected in sequence; the bypass switch is arranged between the first connection point and the second connection point; wherein, the power grid and the first The isolation switch is connected through the first connection point, and the triac and the second isolation switch are connected through the second connection point; the second connection point, the LCL filter, the three-phase inverter and the energy storage system are connected in sequence; the three-phase inverter adopts Three-level diode-clamped topology. It can reduce circuit harmonics and ripple current, reduce the required output inductance and filter capacitor size, and reduce the loss caused by ripple current. |