Simulation and Measurement of Vibration Characteristics of Magnetic-valve Controllable Reactor

The magnetic-valve controllable reactor (MCR) has been widely applied in power system because of its excellent working characteristics and continuously adjustable capacity. Due to the special core magnetic valve structure and AC/DC co-excitation working mode, the vibration and noise problem of MCR is serious, which has become the main factor restricting the development of MCR. This article establishes the three-dimensional core magnetic field-mechanical coupling model based on the distribution of finite element software. For the centralized magnetic valve structure, the magnetic field and vibration displacement of iron core under different DC control current are numerically calculated. Besides, the vibration acceleration and noise of MCR surface under different loads are also measured and the frequency spectrum of vibration and noise signals are analyzed. According to the simulation results, the magnetic flux density at the magnetic valve is significantly higher than other parts. The value of displacement around the magnetic valve area and “T-type” contact surface are larger. The sound pressure of MCR is higher under load 18600kvar condition and the low frequency harmonic component of time domain waveform increases. The results can provide calculation method and experimental data for the analysis of the vibration characteristics of MCR.