Initiall Control ldea-why V can't it work otor voltage stator voltage control fault
Initial Control Idea – why can’t it work? stator voltage rotor voltage control i r fault
Recent studies in Wind Power Grid Doubly Fed Induction Generator Gearbox Filter Wind turbine 4Q Converter DFIG Grid Fault Ride Through
Recent Studies in Wind Power Gearbox Wind Turbine Doubly Fed Induction Generator 4Q Converter Filter Grid DFIG Grid Fault Ride Through
Feasibility Region with Proposed Control Riding-through operation range 0.2 riding-through operation fange a0.15 0.1 0.05 super-synchronous sub-synchroneus -0.1 0.1 0.2 0.3 Pre-fault silp: so (pu) This plot says that the dF iG can successfully ride through a grid fault which brings terminal voltage down to 0.3 pu, even it initially operates at full speed
-0.3 -0.2 -0.1 0 0.1 0.2 0.3 0 0.05 0.1 0.15 0.2 0.25 Pre-fault silp: s0 (pu) Fault voltage level: Us (pu) Riding-through operation range riding-through operation range Feasibility Region with Proposed Control { super-synchronous sub-synchronous This plot says that the DFIG can successfully ride through a grid fault which brings terminal voltage down to 0.3 pu, even it initially operates at full speed
Durha 30 kW DFG Test Rig Grid Ⅹ PC-Targetbox4 Q conV VARIAC real time system i Filter DFIG prime drive with programmable direct torque control
Durham 30 kW DFIG Test Rig prime drive with programmable direct torque control DFIG XPC Targetbox real time system Filter Grid 4Q conv VARIAC
Laboratory verification Rotor current constrained by control Simulation Experiment 1.5 30.5 -0.5 -0.5 1.5 1.5 10 10.05 Time(s Time(s)
Laboratory verification 9.95 10 10.05 10.1 -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 ir-abc (pu) Time (s) 9.95 10 10.05 10.1 -2 -1.5 -1 -0.5 0 0.5 1 1.5 2 ir-abc (pu) Time (s) Rotor current constrained by control Simulation Experiment