金属氧化物避雷器测试仪的设计

Designing for metal oxide arrester testing

金属氧化物避雷器测试仪是电力系统中常用的一种过电压保护装置,它具有非常好的非线性,在电力系统中得到广泛的应用。论文针对电网电压谐波因素对测试结果的影响,在结构上,采用了TMS320C32和LPC2214芯片,并且利用双口RAM进行通讯。算法核心部分主要是利用TMS320C3 2实现,使用了FFT滤波,并用了外,自补偿法进行在线测试,取得了较满意的测试结果。通过LPC2214来完成系统的人机交互,网络控制等功能,可以实时地进行在线测试。具有测量速度快,精度高的特点。

Metal oxide arrester （MOA） is a technology of electric over voltage protection which has been developed and extensively used in the electric power system, it has a very well nonlinear characteristic, this paper aims at the harmonic voltage＇ s influence to the testing result. Structurally, use 32-bits DSP3x and ARM9, introduce the dual port RAM to achieve communication. Using the TMS320C32 to carry out the hard core of the arithmetic, with the FFT to filter the waves, using the self-compensate and outer-compensate method to carry on on-line test, the result is satisfying. And use the LPC2214 to complete Human Computer Interaction,network control,etc. It can do on-line test real-timely,the speed is high, the precision is high, it has a good effect in practical usage.