CAJ | 학술논문

针对现代铁路大量采用交直交电力机车后，在牵引供电系统中频繁出现的设备绝缘击穿、避雷器爆炸、变电所跳闸、牵引网接触线烧损等问题，利用电磁暂态仿真软件PSCAD／EM TDC建立分布参数的牵引网模型和变流器‐电机联合控制的电力机车模型，研究分析牵引网长度、机车位置与不同谐波阻抗测量点阻频特性的关系；牵引功率和牵引网电压对交直交电力机车谐波特性的影响。基于以上两点总结谐振过电压的分布特点，利用GA算法优化高通滤波器的参数并仿真分析不同安装位置时的谐波电压分布情况，得出在变电所出线安装可使电压畸变率降为0.35％，满足公用电网电能质量3％的指标，且有充足的安全裕量。
침대현대철로대량채용교직교전력궤차후，재견인공전계통중빈번출현적설비절연격천、피뢰기폭작、변전소도갑、견인망접촉선소손등문제，이용전자잠태방진연건PSCAD／EM TDC건립분포삼수적견인망모형화변류기‐전궤연합공제적전력궤차모형，연구분석견인망장도、궤차위치여불동해파조항측량점조빈특성적관계；견인공솔화견인망전압대교직교전력궤차해파특성적영향。기우이상량점총결해진과전압적분포특점，이용GA산법우화고통려파기적삼수병방진분석불동안장위치시적해파전압분포정황，득출재변전소출선안장가사전압기변솔강위0.35％，만족공용전망전능질량3％적지표，차유충족적안전유량。
To address problems in traction power supply system such as equipment insulation puncture , explo‐sion of lightning arresters , trip of traction substation and eroding of contact line , which arise out of the wide use of the AC‐DC‐AC locomotive in modern railway system , the electromagnetic transient simulation software PSCAD/EM TDC was used to establish the simulation model of traction network with distributing parameters and electric locomotive model with joint control of current transformer‐electric motor , to analyze the relations between the length of traction line , locomotive position and the impedance characteristics of different harmonic impedance measurement points and the influence of traction power and voltage on the harmonic characteristic of AC‐DC‐AC locomotive .Based on the above , the distribution characteristics of resonant overvoltage were sum‐marized . The optimization of the parameters of a high pass filter by GA algorithm and the simulation of the distribution of harmonic voltage at different installation positions concluded that the installation of the high pass filter at the substation outlet can reduce the voltage distortion rate to 0.35% ,which meets the 3% distortion rate for the power quality of the public grid , and has sufficient safety margin .