基于DSP的电力阻波器高频参数测试系统设计

Design of DSP-based high-frequency parameter test system for power trapper

简要介绍了高频阻波器的组成,利用相关法提出了阻波器阻塞特性测试算法,该算法直接对2个被测信号作互相关运算,有效地分离出部分噪声分量。总结了一套实用的阻波器阻抗和电阻分量的计算公式。Matlab仿真结果验证了所提测试算法的有效性。基于DSP设计了阻波器测试系统,该系统由电源、微处理器、随机存储器、控制逻辑等组成;其主程序主要由初始化模块、键盘扫描模块、数据处理模块、结果显示模块组成。对具有典型参数的定K型宽带调谐阻波器进行分析,实验结果与计算结果的对比表明测试系统具有精度高、速度快、抗噪声性能强的特点。

The composing of high-frequency trapper is briefly introduced and an algorithm based oncorrelati on method is presented for testing its blocking frequency characteristics,which performs directly the cross-correlation computation for two measured signals to effectively separate part of noise components.A set of practical formulas is summarized for calculating the impedance and resistance components of trapper.The effectiveness of the proposed algorithm is verified by Matlab simulation.A DSP-based trapper test system is designed,including the power supply,microprocessor,RAM,control logic and so on.Its main program includes the modules of initialization,keyboard scanning,data processing and result display.The K-type wideband tune trapper with typical parameters is tested and the results are compared with the calculated results,which demonstrate the high accuracy,high speed and excellent anti-noise performance of the designed test system.