The Research Of Harmonic Suppression And Var Compensation In Electrolysis Industry Converting System

With uninterrupted development of the power and electron technology and the control technique, its application already goes deep into to the manufacturing production and the social life,including:Electrochemistry,direct-current drive,alternating drive,electroplating and electro-machining etc. So that it becomes the key technology in conventional industries and high and new technology fields. However ,the negative effect has been also gradually obvious. Because the power electronic equipment switching motion has caused large amount of harmonic,it results in the distortion of voltage and current waveform of the AC network, and quality of powered drop. So, it is urgent to eliminate harmonic and improve power quality.This paper has four major compositions: The first part is the first chapter, introduced the general situation of electrolysis industry, the present and the improvement trend at home and abroad; Pointed out the current power system harmonics pollution problems as well as the development of harmonic suppression overview; Analysised the converter system harmonic generation,harm and suppression measures; Expounded the measures and the current situation of harmonic suppression and reactive power compensation.The second part only includes the second chapter. It mainly discusses the novel converter transformer and corresponding inductive filtering technique in the novel converter system, which uses the transformer's ampere-turn balance and full-tunable passive filter device to achieve reactive power compensation and harmonic shielding; And introduced the novel converter system's wiring mode and fundamental working principle; deduced the transitive relation of the voltage and current.The third part includes the third and the four chapters. Based on the novel converter system's, to get out the system's harmonic transfer characteristic, (including characteristic harmonic, non-characteristic harmonic, inter-harmonic and sub-harmonic) to provide an important design parameter of full-tunable filter design; And introduced the design and reactive-load compensation scheme of the filter device in novel converter system.The fourth part is the fifth chapter, to validate the superior filtering effect of the inductive filtering technique, by comparing the novel converter system and the traditional converter system simulation results, and by comaring the test result of the traditional system and the first suit of novel system in the Zhuzhou chemical industry company, at the same time this method realizes harmonic shielding and reactive power compensation at the transformer's secondary side; Opened out the superiorities of the novel filtering method and the novel converter transformer converter system.