Research and application on signal anti-interference of distributed control system in thermal power plant

doi:10.11930/j.issn.1004-9649.2012.4.64.3

Abstract

Abstract: To solve the problem of signal interference in distributed control system （DCS） of thermal power plant, five interferences were analyzed. The interferences were system internal interference, power disturbances, conduction disturbances, grounding interference and radiation interference. Six anti-interference measures, which were isolation device, power selecting, cable selecting, cable laying, effective filter, properly grounding, were proposed. The causes and solutions for abnormal fluctuation of boiler drum level signal and drum pressure signal in a 2×300 MW unit were systematically analyzed. Three notable requirements in the anti-interference process of design, construction and operation of the DCS in the thermal power plant were proposed. The results can provide reference for the technicians of the power plant.

Key words: thermal power plant, DCS, anti-interference, shielding measures

CLC Number:

TK323

ZHOU Qian, LU Xue-nong, ZHANG Wen-jing. Research and application on signal anti-interference of distributed control system in thermal power plant[J]. Electric Power, 2012, 45(4): 64-67.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2012.4.64.3

https://www.electricpower.com.cn/EN/Y2012/V45/I4/64

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Research and application on signal anti-interference of distributed control system in thermal power plant

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