大功率電弧加熱器電源的設(shè)計研究

大功率電弧加熱器電源的設(shè)計研究:研究了63MW 等級的大功率不電弧加熱器交直流電源的主電路設(shè)計和控制策略。提出了一種相移疊橋組合晶閘管整流主電路結(jié)構(gòu)，使得該電源輸出直流電壓從1kV 到21kV 的不同工況時，其輸入端的功率因數(shù)不小于0.9，且高功率時THD 小于5%。根據(jù)主電路相移疊橋結(jié)構(gòu)的特點(diǎn)，提出了一種非線性反饋控制器和前饋控制器相結(jié)合的復(fù)合穩(wěn)流控制策略，穩(wěn)流精度能夠達(dá)到0.1%。實(shí)驗結(jié)果表明，相移疊橋組合晶閘管主電路結(jié)構(gòu)達(dá)到了電源電能質(zhì)量設(shè)計指標(biāo)；采用復(fù)合穩(wěn)流控制策略后，穩(wěn)流精度不僅能夠達(dá)到設(shè)計指標(biāo)，而且可以去掉主電路中的穩(wěn)流電阻，從而減小了電源系統(tǒng)1.8MW 的電阻熱耗。
Abstract : An AC/DC converter and its control strategy for 63MW high power arc heater is investigated. A new main
circuit configuration named phase-shift bridge cascaded multiplex is proposed in this paper. This new configuration enables
higher power factor more than 0.9 and lower THD distortion less than 5% at high power condition for AC side of the
converter at conditions various from DC 1kV to DC 21kV output voltages. A kind of current stabilizing control scheme
combined nonlinear feedback and feedforward Based on characteristic of the proposed AC/DC converter configuration. Upon
this control scheme, the stabilized current precision reaches 0.1%. The results of the experiment indicates that the phase-shift
bridge cascaded multiplex AC/DC converter satisfies the requirement of the power quality and current stabilized precision.
As the benefit of the current stabilizing control scheme for the AC/DC converter is the stabilizing resistor could be saved which will dissipate 1.8MW power loss in thermal conversion .
關(guān)鍵詞﹕AC/DC 變換器，電弧加熱器，電源
Keywords: AC/DC Converter, Arc Heater, Power Supply