保定电气厂

装置采用了80C196单片微机作为核心，对PT开口三角电压（即：零序电压）进行循环检测，在正常工作情况下，该电压在30V以下，装置内的大功率消谐元件处于阻断状态，对系统无任何影响。当PT开口三角电压大于30V时，说明系统出现故障，本装置对电压互感器开口三角电压进行数据采集，然后对数据进行分析，判断出当前的故障状态；如果是某种频率的铁磁谐振，迅速启动消谐电路予以消除。如果是过电压或接地，装置给出相应的报警信号。

The device adopts 80C196 single chip microcomputer as the core of the PT open delta voltage (i.e., zero sequence voltage) for cycle detection, in the normal condition, the voltage is below 30V, the power device of the harmonic component in the blocking state, without any impact on the system. When PT open delta voltage is greater than 30V, indicating a system failure, the device open delta voltage of voltage transformer is used for data acquisition, and then analyze the data, determine the fault current state; if it is a ferromagnetic resonance frequency, the rapid start circuit to eliminate harmonic elimination. If it is over voltage or grounded, the device gives the corresponding alarm signal.

对于各种故障，装置可以分别给出报警信号和显示、打印，并自动记录、存贮有关故障信息，并上报给上位机。

For various faults, the device can respectively give an alarm signal and display, print, and automatically record and store the relevant fault information and report it to the upper computer.