锡盟-泰州特高压直流输电工程受端串联阀组中点分压器电压采集异常解决策略  

Cause analysis and countermeasures for UdM collection abnormal in Ximeng-Taizhou UHVDC project B station

作　　者：郭虎锋 张五悦 刘霄 兰岚[1] Guo Hufeng;Zhang Wuyue;Liu Xiao;Lan Lan(He’nan Jiaotong Vocational and Technical College,Zhengzhou 450000)

机构地区：[1]河南交通职业技术学院,郑州450000

出　　处：《电气技术》2020年第6期73-77,共5页Electrical Engineering

摘　　要：对锡盟-泰州特高压直流输电工程在经研院调试期间受端串联阀组中点分压器电压采集异常振荡情况进行了描述,根据工程的实际应用和硬件配置情况,通过追踪数据采集链路对问题进行了分析。主要原因是阀组测量层在多个频率下进行采样,发生了信号混叠现象。针对问题提出了3种解决策略和具体实施方法,并结合工程的实际情况选用了在阀组测量采样前增加滤波的方法。滤波器选用无限脉冲响应数字滤波器,在现场可编程门阵列内部实现滤波器算法。方法实施后,进行了大量工程试验,串联阀组中点分压器电压采集异常问题得到有效解决,工程运行稳定。This paper describes the abnormal oscillation of the UdM(midpoint divider in series valve group)voltage acquisition during the commissioning period of the XiMeng-TaiZhou UHVDC transmission project B station.According to the actual application and hardware configuration of the project,the problem is analyzed by tracing the data acquisition link.The main reason is that the valve group measurement layer is sampled at multiple frequencies,resulting in the signal aliasing phenomenon.In view of the problem,three strategies and concrete implementation methods are proposed,and the method of adding filter before sampling in the valve set is chosen in combination with the actual situation of the project.Filter using IIR digital filter,implement filter algorithm inside FPGA.After the implementation of the method,a large number of engineering tests were carried out,the UdM acquisition anomaly was effectively solved and the engineering operation was stable.

关 键 词：特高压直流 信号混叠 现场可编程门阵列 无限脉冲响应数字滤波器 

分 类 号：TM721.1[电气工程—电力系统及自动化]