Current control system for LCL type grid-connected inverter and active high-frequency damping method of current control system for LCL type grid-connected inverter
A current control and control system technology, applied in AC network circuits, AC power input conversion to DC power output, electrical components, etc., can solve the problems of digital controller current control gain limitation, etc., to improve stability characteristics and system bandwidth Improve and compensate for delay effects
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[0050] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0051] The grid-connected current control system includes the main circuit part and the control circuit part, the main circuit part is as figure 1 The topology shown, including the DC-link voltage v dc , grid voltage v g and the LCL filter together constitute the LCL grid-connected inverter, the DC bus voltage v dc The anode of the switch tube G 1 , G 3 , G 5 The collector is connected, the DC bus voltage v dc The negative pole of the switch tube G 2 , G 4 , G 6 The emitter is connected, the switch tube G 1 , G 3 , G 5 The emitters are respectively connected with the switch tube G 2 , G 4 , G 6 The collector is connected, the switch tube G 2 , G 4 , G 6 The collectors are respectively connected with the inductor L 1a , L 1b , L 1c Connected to one end of the inductor L 1a , L 1b , L 1c The other end of the capacitor C ...
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