广元市电网谐波抑制方法研究-电气工程专业论文.docxVIP

重庆大学硕士学位论文 重庆大学硕士学位论文 英文摘要 ABSTRACT With the quick development of the industry and agriculture，the category of electric power system gradually increases．Consumers successively plunged a large number of silicon controlled commuted devices(such as steel rolling、electrized locomotive、aluminium electrolysed devices etc)and smelting devices to improve their produced efficiency to energy．On the one hand it is good for consumers，on the other hand it will the fluctuation of voltage and frequency and it will result in the collision of the active and reactance capacity．Meanwhile these nonlinear loads bring much harmonic into the electric network which deteriorate the quality of power supply and hazard the online device enormously． The power Supply＆Transmit electricity system in GuangYuan fulfilled the role of supplying main power to GuangYuan city．While the harmonic occurred iS very serious and it has not been restrainted．The main harmonic two 10ads：aluminium electrolysed load and electrized locomotive 10ad． The engineer of the Electric Power Science Academy tested the harmonic occurred in 220KV transforlTler substation in BaiShiYan、1 10KV transformer substation in NanTuPo、1 1 OKV transformer substation and converting station in 82 1 factory．This article analyzed these data particularly． The three．phase commuted device of 82 1 factory is one of the main harmonic in the power Supply＆Transmit electricity system in GuangYuan． This article analyzed the three··phase full—controlIed bridge commuted circuit、the three·phase half-controlled bridge commuted circuit and the harmonic occurred by the two circuits．Through the analysis to the relative merits of the Passive Filter and Active Filter，a new applied harmonic current compensation device was presented in this article．This device was made up of Active Filter and a High—PASS Passive Filter． Electric railway traction load is the high--po