汽轮机监测系统(TSI)现场噪音干扰及其抑制

Noise Interference and Control in Turbine Supervisory Instruments

以一个具体事例首次在理论上从分布电容和均匀长线传输两个方面,提出为了抑制高噪声对汽轮机安全监视保护装置(TSI)系统的渗入,就地电缆的屏蔽层使用了一种新的、独特的接地方式。这种接地方式和电厂热工通常的施工原则不同,是现场接地。把汽轮机巨大的底座作为现场良好的接地导体,对于与DCS相连的其它的现场设备也有很好的参考价值。这种接地方式在实际中取得了非常好的效果。

For restraining high noise interference in turbine supervisory instruments （TSI）, for the first time, from two sides in theory - distributed capacitance and long distance transmission uniformly, a new and unique grounding method for cable shield is brought forward. This method has great effect on reducing interface noise in TSI. This unique grounding method is named locale grounding. The locale grounding conductor is the huge pedestal of the turbine. This method also has reference value for other locale equipments in DCS. It is very good and useful for practical operation in power plant.