This paper have introduced the measure detecting system in gas electric plant.

The status of CBM development and utilization and the benefit of emission reduction and energy conservation by gas power generation are analyzed in the paper,and suggestions to speed up CBM development and utilization are also proposed.

The developing methods and gas production characteristic of three coal mine gas were first introduced, the status of gas power generation was then described, the application conditions of gas turbine and internal combustion engine were furthe.

In order to improve air quality and develop clean energy,this paper takes the American CATERPILLAR gas generating set as an example,introduces basic flow of power generation with gas,basic characteristic and DCS communication of gas-fired unit.

During adjustment and trial operation in Lingao Nuclear Power Station the main and auxiliary transformers have some problems, including the abnormal action of gas relay, total hydrocarbon of the transformer oil and acetylene contents exceeding the standards, crack of O-shape seal ring for load-tap.

Form three practical cases,it is shown that the gas content analysis is a quick and reliable diagnosis method to determine the action causes of gas relay in transformer.