发电机工况监测系统中的干扰及其抑制

Discussion on the Disturbance and Its Restrain in the Working Condition Monitoring System of the Generators

发电机在长期运行中 ,因受原动机、负载、环境等影响 ,工况在瞬时变化着 ,采用高精度的传感仪及仪表对其电压、电流、频率、转速、温升、振动及各控制单元实行检测和监控是实行安全运行的重要措施 ,电信号在检测及传输中 ,极易受到各种干扰 ;本文主要对静电耦合干扰、电磁耦合干扰、导电感应干扰及电磁幅射干扰产生的原因作分析 ,并以检测电路为例 ,提出有效抑制干扰的方法。

The working condition of generator is changing by the effect of engine, load and condition. Using high accuracy sensors and instruments to monitor its voltage, current, frequency, revolution, temperature rising, vibrate and every control units, is very important to keep the generator in safety. But the signature can be disturbed very easily in detecting and transmitting. In this article, the author analyzed the reasons of generate static electricity coupling disturb, electromagnetic coupling disturb, electric conduction responsing disturb and electromagnetic radio action disturb by illustrated detecting circuit, the author proposed some effective methods.