Research And Application Against Disturbance Of Monitoring And Testing Signal Of Generators

This paper mainly studied against disturbance of monitoring and testing non-electric signal of generators, and emphasized on how to design its software and hardware against disturbance in the process of acquirement and treatment. In the example of temperature signal, based on the SJ-40 temperature multi-function controller made by Nanjing Automation Research Institute, Automatic Control Company, this paper introduced the reformative research and development for this instrument. Through analysis and experiment, the part of hardware of this instrument was made a big changed, and a kind of new resolution against disturbance was introduced on the paper. There is a great important benefit for the reality application to improve the performance of instrument monitoring and testing non-electric signal of generators against disturbance in the environment of power station.The main contents in the paper are including: firstly, for the acquirement of temperature. Firstly, two current resources of model XTR105 were used to improve the magnitude of current promptings. Secondly, there is a kind of new application that electronic switches were replaced by relays, and instrument amplifier, low pass filter and isolation amplifier were designed in the former channel of acquiring signal. Thirdly, a kind of model of configuration has been introduced with more channels of acquirement and more Analog to Digital converters. Fourthly, a special technology, virtual instrument Labview, has been applied in analyzing simulating and comparing the local environment in order to form a kind of digital filter solution. Fifthly, two communication ports of serial port and CAN BUS were redesigned in the paper. Sixthly, distributed monitoring system based on CAN BUS was discussed about monitoring and testing non-electric signal of generator in this paper, which must be used for reference in the other fields.The disturbance may be existed in the monitoring and testing process of non-electric signal of generators generally, and is still troublesome problem, which directly influents instrument's stability and reliability. With the development of science and technology, foreseeingly, more and more advanced instruments against disturbance will be used in monitoring and testing process of non-electric signal of generators.