This paper introduces a magnetic-saturated controllable reactor with symmetrical magnetic structure

analyzes its basic circuit structure

operational mechanism and state

and theoretically analyzes its operational characteristics of control and harmonic.Furthermore

the nonlinear function relationship between the output currents and the firing angle of the GTO connected with the controllable winding of the controllable reactor is obtained.By simulation of a small-capacity industrial model machine

the response and harmonic characteristics of output current versus saturation are achieved.The simulation results are consistent with the theoretical ones

which verifies the correctness and accuracy of the simulation model

and demonstrates that this kind of controllable reactor has better controllability and lower harmonic component of output current.