Unlike the traditional traction power supply system which enables the electrified railway traction sub- station to be connected to power grid in a way of phase rotation, a new generation traction power supply system w...Unlike the traditional traction power supply system which enables the electrified railway traction sub- station to be connected to power grid in a way of phase rotation, a new generation traction power supply system without phase splits is proposed in this paper. Three key techniques used in this system have been discussed. First, a combined co-phase traction power supply system is applied at traction substations for compensating negative sequence current and eliminating phase splits at exits of substations; design method and procedure for this system are presented. Second, a new bilateral traction power supply technology is proposed to eliminate the phase split at section post and reduce the influence of equalizing current on the power grid. Meanwhile, power factor should be adjusted to ensure a proper voltage level of the traction network. Third, a seg- mental power supply technology of traction network is used to divide the power supply arms into several segments, and the synchronous measurement and control technology is applied to diagnose faults and their locations quickly and accurately. Thus, the fault impact can be limited to a min- imum degree. In addition, the economy and reliability of the new generation traction power supply system are analyzed.展开更多
为解决重载铁路牵引供电系统存在的过分相、再生制动能量利用率低、牵引变压器负载率低等问题,提出一种既有电气化铁路长距离供电改造方案,在牵引变电所设置静止无功发生器(Static Var Generator,简称SVG)动态补偿无功,延长供电距离;将...为解决重载铁路牵引供电系统存在的过分相、再生制动能量利用率低、牵引变压器负载率低等问题,提出一种既有电气化铁路长距离供电改造方案,在牵引变电所设置静止无功发生器(Static Var Generator,简称SVG)动态补偿无功,延长供电距离;将既有线的Vv接线牵引变压器改造成单相牵引变压器,以便组合式同相供电装置的改造,并促进变压器容量的合理利用;在牵引变电所内设置组合式同相供电装置,补偿负序,并在全线实现贯通式供电。文中在以往牵引供电系统建模及连续性潮流计算的基础上,对SVG和组合式同相供电装置进行建模,研究其对牵引变电所馈线电压的影响,以实现对改造方案负荷过程的仿真和校验。算例分析表明,长距离供电改造可以提高再生制动能量利用率和牵引变压器负载率。展开更多
基金supported by the National Natural Science Funds of China (Nos. 51307143 and 51307142)Technology Research and Development Program of China Railway Corporation (No. 2014J009-B)
文摘Unlike the traditional traction power supply system which enables the electrified railway traction sub- station to be connected to power grid in a way of phase rotation, a new generation traction power supply system without phase splits is proposed in this paper. Three key techniques used in this system have been discussed. First, a combined co-phase traction power supply system is applied at traction substations for compensating negative sequence current and eliminating phase splits at exits of substations; design method and procedure for this system are presented. Second, a new bilateral traction power supply technology is proposed to eliminate the phase split at section post and reduce the influence of equalizing current on the power grid. Meanwhile, power factor should be adjusted to ensure a proper voltage level of the traction network. Third, a seg- mental power supply technology of traction network is used to divide the power supply arms into several segments, and the synchronous measurement and control technology is applied to diagnose faults and their locations quickly and accurately. Thus, the fault impact can be limited to a min- imum degree. In addition, the economy and reliability of the new generation traction power supply system are analyzed.
文摘为解决重载铁路牵引供电系统存在的过分相、再生制动能量利用率低、牵引变压器负载率低等问题,提出一种既有电气化铁路长距离供电改造方案,在牵引变电所设置静止无功发生器(Static Var Generator,简称SVG)动态补偿无功,延长供电距离;将既有线的Vv接线牵引变压器改造成单相牵引变压器,以便组合式同相供电装置的改造,并促进变压器容量的合理利用;在牵引变电所内设置组合式同相供电装置,补偿负序,并在全线实现贯通式供电。文中在以往牵引供电系统建模及连续性潮流计算的基础上,对SVG和组合式同相供电装置进行建模,研究其对牵引变电所馈线电压的影响,以实现对改造方案负荷过程的仿真和校验。算例分析表明,长距离供电改造可以提高再生制动能量利用率和牵引变压器负载率。
