Research And Analysis On The Characteristics Of New Magnetic Control Reactor

With the rapid development of China's modern industry,the rapid development and application of ultra-high voltage cross-regional long-distance transmission technology and power electronics technology and the continuous access of various shock loads in the power grid have led to the increasingly serious problem of reactive power balance in the power grid.As a reactive power compensation device,the magnetic control reactor(MCR)can continuously and smoothly adjust reactive power.At the same time,it has the advantages of high reliability and simple manufacturing process.It can compensate reactive power in the power system and suppress line overvoltage,ensure the safe and stable operation of the power system.Based on the traditional magnetic reactor,a new type of magnetic reactor is designed in this paper.The magnetic reactor adopts the technology of magnetic valve controllable reactor and unsaturated iron core reactor series connection,and the middle column is unsaturated iron.The AC magnetic flux flowing on the core is the sum of the AC magnetic fluxes of the two side pole iron cores,and the DC magnetic flux of the magnetic valve controllable reactor does not flow through the center pole iron core.This structure can greatly reduce the coil turns of the magnetic valve reactor,thereby reducing the power loss of the magnetic control reactor and reducing heat generation.This article mainly analyzes and researches the working characteristics,response characteristics,harmonic characteristics and electromagnetic characteristics of the new type magnetic control reactor.In this paper,the main structure and working principle of the new type magnetic control reactor are analyzed in detail,and the electromagnetic characteristics,harmonic characteristics and working condition conversion conditions of the new type magnetic control reactor are theoretically deduced in detail.In the finite element electromagnetic analysis software Ansys Maxwell,a two-dimensional simulation model of a new type ofmagnetic control reactor was established.The field-circuit coupled multi-physics domain joint simulation method was used to realize the joint simulation of Maxwell and Simplorer,and the trigger angle of the thyristor in the control winding was changed To obtain the output current of the working winding under different working conditions,and further study the relationship between the trigger angle of the thyristor and the working current.This experiment shows that the new type of magnetic control reactor can continuously and smoothly adjust the output reactive current,and the response speed is fast.Then,the Fourier harmonic analysis is performed on the working output current of the new magnetic control reactor on the Matlab experimental platform.The experimental results show that the main output current of the new magnetic control reactor is mainly the third and fifth harmonics.Even harmonics and higher harmonics have less content.In the Ansys Maxwell software,the electromagnetic simulation of the new magnetron reactor is carried out.The experimental results show that when the new magnetron reactor is working normally,only the iron core structure with a small cross-sectional area,that is,the "magnetic valve" is in a saturated nonlinear state,while the rest The core parts are all in an unsaturated linear state.Finally,the simulation experiment of magnetic field characteristics proves the rationality and correctness of the design of the new magnetic reactor.