摘要
传统监测方法在监测高速铁路牵引供电电压时,误差较大,与实际值不符。为解决上述问题,研究了一种新的高速铁路牵引供电电压在线监测方法,在高速铁路牵引供电网为空载状态下,利用两条导线测量高速铁路牵引供电电压,结合交流电流有效值i和测量电阻R,求出电压有效值U;通过三表法记录电压滤波,使用MATLAB算法对录波电压进行傅里叶分解,实现供电电压在线分析;采取信号发生器和雷击浪涌发生器在CVT和分压器中施加不同的电压信号,得到供电电压实际值,比较两组测量结果,判断监测到的电压值是否准确。为验证监测效果,设计对比实验,实验结果表明,监测结果与实际值误差小于0.01%。说明监测方法具有较高准确率。
When traditional monitoring methods are used to monitor the traction power supply voltage of high-speed railway,the error is large,which is not consistent with the actual value. In order to solve the above problems,a new on- line monitoring method of traction power supply voltage for high- speed railway is studied. In the no-load state of traction power supply network for high-speed railway,two conductors are used to measure traction power supply voltage of high-speed railway,and the effective value of voltage is obtained by combining the effective value of AC current and the measured resistance. The voltage filtering is recorded by three- meter method,and the recorded voltage is input by using MATLAB algorithm. Fourier decomposition is used to realize on-line analysis of power supply voltage. Signal generator and lightning surge generator are used to apply different voltage signals in CVT and voltage divider to obtain the actual value of power supply voltage. The measured results of the two groups are compared to determine whether the voltage value monitored is accurate. In order to verify the monitoring effect,a comparative experiment was designed. The experimental results show that the error between the monitoring result and the actual value is less than 0.01%. Explain that the monitoring method has a higher accuracy rate.
作者
张玲
ZHANG Ling(Traction Power College,Xi'an Railway Vocational&Technical Institute,Xi'an 710026,China)
出处
《电子设计工程》
2019年第16期70-73,78,共5页
Electronic Design Engineering
关键词
高速铁路
牵引供电
电压监测
在线监测
供电电压
high-speed railway
traction power supply
voltage monitoring
on-line monitoring
powersupply voltage
