Gas chromatographic analysis of the necessity of the transformer oil: high pilot measurement time: 2004-8-29 reading: a gas chromatography analysis by gas chromatography is a physical separation and analysis techniques, the analysis program is the first sampling transformer oil by vacuum pump degassing means gas dissolved in the oil separated out, injected with a syringe quantitative chromatographic analyzer, in a carrier gas flow through the column to promote, a mixed gas after the separation column, through the identification is detected. Each gas components are separated according to a certain order-by-class will be certified for gas concentration into electrical signals, and then recorded by the logger, and in accordance with the order of the components are arranged in a pulse peak, forming a chromatogram a pulse peak represents one gas component, peak height or area of ??the anti-concentration should be gas. Chromatogram for a given gas to be analyzed qualitatively and quantitatively analyzed, and then the concentration is calculated after the peak height of each gas component. Two, 2010D transformer oil chromatographic analyzer for gas chromatographic analysis of transformer oil has a very important role in the insulation supervision: 1, the device can detect internal faults, forecast the development trend of the fault, so that the actual existence of the fault is planned and the economy maintenance, to avoid equipment damage and unplanned outages 2, when the equipment is faulty internal diagnosis, failure to come to develop a reasonable treatment measures according to the fault of the dangers, the importance of the equipment, load requirements and security and economic, to ensure that the device does not occur damage; 3, for the accident has occurred equipment, help to understand the nature and extent of damage to the equipment of the accident, in order to guide the overhaul. Third, the error oil chromatographic analysis by gas chromatography analysis of dissolved gases in transformer oil to be analyzed from the sample to obtain more operational analysis process, so the error is relatively large, for the accuracy of the data should be in the actual work particular attention to the following aspects: 1. To avoid sampling error method, using glass syringes sampling syringe should pull off the core, in order to avoid inhaling air; oil samples during transportation to avoid oscillation, sealed container to be strict. 2. To avoid errors degassing process, when used to take gas to be sealed syringe. 3. Injection injection volume size for the qualitative and quantitative results may produce errors. 4. By manual measurement logger records the peak height or half-width, and then calculate the actual amount of peak Supreme Court, inevitably bring the measurement and calculation errors. In practice, as long as carefully treat every aspect of error can be reduced, so that the analysis results are basically correct. Fourth, the GC method used to determine fault: 1. Characterized by oil dissolved gas content and pay attention to the value of comparing initial judgment. The main features include total hydrocarbon gases (C1 + C2), H2, etc. Since the gas transformer oil produced under different fault have different characteristics, so you can make a preliminary judgment on the nature of the fault of transformer based on the results of gas chromatography and gas, and other features of note values. Bare metal inside the transformer overheating oil cracking gas properties primarily methane, ethylene, acetylene followed. Normal transformer oil with little or no such low hydrocarbon gases, if the oil content of these gases surge, may belong to the bare metal of overheating, such as tap-bad, bad wire welding. Transformer internal discharge characteristics of the fault is acetylene gas, normal transformer oil free of such gases, if found in the analysis of this gas should closely monitor developments, if growing rapidly, indicating that memory discharge of transformer failure. If the transformer hydrogen and methane content, total hydrocarbon gas is not high, methane is the main component of the total hydrocarbons, there may exist a partial discharge resistant faults. If the content of gaseous components in higher acetylene and hydrogen, the total of the hydrocarbon gas is not high, there may be a spark discharge within the transformer fault. If the transformer of the total hydrocarbon gas is high, the hydrogen content is high, acetylene is the main component of the total hydrocarbons, it is possible to have arcing fault. 2. According to gas production rate to determine the point of failure. Some equipment for some reason the gas content of more than note value, can not conclude whether the failure; and some equipment, although lower than note values, such content is growing rapidly, it should be noted. Gas production rate of the reaction of failures exist, the severity of its development trend is more direct and obvious, you can further determine the presence and nature of the fault. Gas production rate includes gas production rate absolute and relative gas production rate. Solid insulating materials at high temperatures within the transformer failure caused by cracking, to produce large amounts of carbon monoxide and carbon dioxide gas. Transformer in the long-term normal operation, due to the aging of solid insulation materials, will produce the same gas, aging is a normal phenomenon, not a malfunction. Whether the fault, according to the growth rate of the gas to determine. Sometimes also combined electrical performance testing, chemical testing and operation inspection conducted a comprehensive analysis to determine the type of fault. 3. Judged by three-ratio method. When it is determined in accordance with note values ??may be defective or gas production rate of each component content available three-ratio method to determine the type of fault that CH4 / H2, C2H4 / C2H6, C2H2 / C2H4. For example, the three ratios encoded as 102, the nature of the fault may be the high energy discharge; three ratio code is 020, there may be a low temperature range overheating fault. (C), for the three bearing test class (repair, test) power facilities permit shall have the following machinery equipment: 1. high voltage generating device: DC high voltage generator, AC voltage machines, test transformer, inverter series Resonant Test Suite etc; 2. electrical measuring instruments: dielectric loss tester, loop resistance tester, volt-ampere characteristics of the test equipment, ground resistance tester, capacitance / dielectric loss bridge, measuring current transformers, protection devices tester, transformer DC resistance tester, circuit breakers characteristics tester, arrester characteristics tester; 3. oil and gas testing equipment: insulating oil dielectric strength tester, moisture meter, chromatography, dew point and humidity; 4 Other commonly used instruments. (Four), for the four categories Holds your trial (repair, test) power facilities permit shall have the following machinery equipment: 1. high voltage generating device: DC high voltage generator, AC voltage machines, transformers and other tests; 2 Electrical measuring instruments: dielectric loss tester, loop resistance tester, ground resistance tester, measuring current transformers, protection devices tester, transformer DC resistance tester; 3. Other commonly used instruments. (Five), for the five Holds your trial class (repair, test) power facilities permit shall have the following machinery equipment: 1. high voltage generating device: DC high voltage generator, AC voltage machines, transformers and other tests; 2 Electrical measuring instruments: dielectric loss tester, ground resistance tester, measuring current transformers, protection devices tester, transformer DC resistance tester; 3. Other commonly used instruments.