摘要
针对铁路运输系统中输电线路故障测距和定位效果不佳的问题,提出基于FPGA的铁路电力行波故障定位系统装置。首先,基于暂态行波方法进行故障性质判断,并采用行波信号采集装置进行信号采集;然后利用模极大值算法进行故障特征提取,并通过模量波速时差分段法求出故障距离,从而实现电力行波故障准确定位。仿真结果表明,在铁路线路长度为60 km的状况下,本方法的绝对误差和相对误差分别控制在100 m和0.12%范围内,适应性极强;故障初相角仿真模拟中,故障初相角测距中的绝对误差始终低于80 m,测距误差较小。在不同故障类型测试中,提出故障测距方法的距离误差控制在100 m范围内,测距精度较高。最后在不同故障类型、故障距离和时间差的条件下,本装置的故障距离绝对误差均稳定在200 m范围内。由此可知,设计的故障测距定位装置具备操作性和稳定性,核心故障测距算法提高了电力行波故障定位精度,满足系统设计需求。
The problem of poor fault ranging and positioning effect of transmission lines in railway transportation system based on FPGA is proposed. Firstly, the fault property is judged based on the transient traveling wave method, and the traveling wave signal acquisition device is used to collect the signal;then the fault feature is extracted by the mode maximum algorithm, and the fault distance is determined by the modulus wave speed time difference segment method, so as to realize the accurate positioning of the power traveling wave fault. The simulation results show that under the condition of 60 km, the absolute and relative errors of this method are controlled within 100 m and 0.12%, respectively. Then, the absolute error is always lower than 80 m, and the ranging error is small. In the test of different fault types, the distance error control of the proposed fault ranging method is within 100 m, and the ranging accuracy is high. Finally, the absolute error of the device fault distance under the condition of different fault types, fault distance and time difference is stable within 200 m. It can be seen that the designed fault ranging positioning device has operability and stability, and the core fault ranging algorithm improves the accuracy of power traveling wave fault positioning and meets the needs of the system design.
作者
刘星
LIU Xing(Lanzhou Railway Survey And Desgin Institute CO.LTD,Lanzhou 730000,China)
出处
《自动化与仪器仪表》
2023年第3期162-167,共6页
Automation & Instrumentation
基金
《铁路项目三维协同大数据云平台研究与开发》(院软20-20)。
关键词
FPGA
铁路电力
行波故障定位
故障测距
模量波速时差分段
FPGA
railway power
traveling wave fault positioning
fault ranging
modulus wave speed time difference section
