CAJ | 학술논문

以500 kV输电线路直流融冰为目的,提出一种基于IGBT的移动式多用途直流电源.整套装置由4台电源车构成,容量20 MW.单台电源变流部分由6个结合斩波回路的电压源型换流器VSC模块构成,通过副边为6绕组的变压器接入35 kV系统.应用功率单元模块,通过紧凑化设计将单台电源集成于半挂式平板拖车上,实现了装置的整体移动.采用双层结构的PWM整流稳压结合恒流斩波的控制方式和基于系统级、装置级和单元变流器级的分层式保护设置方案实现现场应用.结合现场实施经验,提出了完整的融冰试验方案.
이500 kV수전선로직류융빙위목적,제출일충기우IGBT적이동식다용도직류전원.정투장치유4태전원차구성,용량20 MW.단태전원변류부분유6개결합참파회로적전압원형환류기VSC모괴구성,통과부변위6요조적변압기접입35 kV계통.응용공솔단원모괴,통과긴주화설계장단태전원집성우반괘식평판타차상,실현료장치적정체이동.채용쌍층결구적PWM정류은압결합항류참파적공제방식화기우계통급、장치급화단원변류기급적분층식보호설치방안실현현장응용.결합현장실시경험,제출료완정적융빙시험방안.
For 500 kV transmission line DC deicing,a displaceable multi-purpose DC deicer based on IGBT (Insulated Gate Bipolar Transistor) is presented. The 20 MW DC deicer is composed of four power vans. Each van has six VSC(Voltage Sourced Converter) with chop circuit,which are connected to 35 kV system through the six secondary windings of transformer. Compact design is applied for fitting the power supply unit in the van. Double-deck structure is adopted for implementing the control mode of PWM(Pulse Width Modulation) rectifying voltage regulator combined with constant current chopper. The layered protection scheme is planned for site application:system layer,equipment layer and converter layer. The deicing test program is proposed based on site implementation experiences.