Reaserch On Magnetic Valve Analysis And Fast Response Characteristic For Magnetically Controlled Reactor

Along with the growing of the power load, the complexity of the grid structure, thedemands of the electric power system of reactive power compensation is more and more big.Magnetic valve controllable reactor using semi limit and limit saturated inductancetechnology, continuously adjustable, so as to realize the smooth adjustment of reactive powercompensation. The way to ensure high compensation precision, are of great significance inpower system normal work and economic benefit of power sector. Although the MCR hasbeen used, but the speed of response, harmonic loss, these three aspects of the long-standingproblem, has always been there, this also has been the important factor to restrict the rapiddevelopment of magnetically controlled reactor. Therefore on the MCR of the three aspects tostudy in the current situation seems to be more urgent.Based on the theory of electromagnetic field, modeling with the Ansoft/Maxwellsoftware simulation of the distribution of magnetically controlled reactor in a period ofmagnetic field. And has carried on the detailed analysis for the single level of magneticallycontrolled reactor and the loss of two-stage magnetic control reactor. The results show that:the loss of two-stage magnetic valve structure than the single level structure loss decreased,magnetic valve area than the impact of core and coil loss, a reasonable selection of themagnetic valve section ratio can bring the loss to a minimum.In addition, the harmonic current of the MCR reactor are discussed. Focus on theanalysis of the magnetically controlled reactor harmonic current characteristics of double,three stage magnetic valve structure, harmonic current equations are derived, and optimizethem harmonic current. The optimization results show that reasonable selection, theoptimization scheme based on ratio of magnetic valve section, can effectively reduce theharmonic content. Based on this, also deduced the multi-stage mathematical model ofharmonic current in the magnetic valve structure, the results show that as the magnetic valvelayer increases, the harmonic content is more and more low.Finally, aiming at the slow response problem of magnetically controlled reactor, thispaper puts forward a method for dynamic response speed based on PWM technology toimprove the magnetic control reactor. A comparative analysis of simulation results show that:this method can significantly improve the dynamic MCR response speed, fully verified thefeasibility and effectiveness of the scheme.The work of this paper mainly includes two parts: one is the harmonic currentoptimization of magnetic control reactor, through the analysis of the double level, three level of magnetically controlled reactor harmonic current, harmonic current constructionoptimization mathematical model of multistage; Two is a single-phase voltage type PWMrectifier inverter circuit on the effectiveness and feasibility study to improve the responsespeed of magnetically controlled reactor.