应用氦离子化气相色谱法测定变压器油中溶解气体

doi:10.11930/j.issn.1004-9649.201610081

中国电力 ›› 2017, Vol. 50 ›› Issue (10): 148-152.DOI: 10.11930/j.issn.1004-9649.201610081

应用氦离子化气相色谱法测定变压器油中溶解气体

邓先钦¹, 彭伟¹, 厉敏宪¹, 熊鸣翔¹, 潘锐², 庄鸿涛², 方华²

1. 国网上海市电力公司电力科学研究院,上海 200437;
2. 上海华爱色谱分析技术有限公司,上海 200437

收稿日期:2016-10-13 出版日期:2017-10-25 发布日期:2017-10-30
作者简介:邓先钦（1988—）,男,江西吉安人,硕士研究生,从事电力用油气检测与研发。E-mail: dxq051@163.com

Determination of Dissolved Gases in Transformer Oil with Gas Chromatographic Helium Ionization Detector

DENG Xianqin¹, PENG Wei¹, LI Minxian¹, XIONG Mingxiang¹, PAN Rui², ZHUANG Hongtao², FANG Hua²

1. State Grid Shanghai Electric Power Research Institute, Shanghai 200437, China;
2. Shanghai Huaiai Chromatography Analysis Co., Ltd., Shanghai 200437, China

Received:2016-10-13 Online:2017-10-25 Published:2017-10-30

摘要/Abstract

摘要： 特高压变压器具有体积大、油量多的特点,造成与故障相关的特征气体浓度非常小,若测试方法的检测限较大,则可能导致设备的状态检测不到位。为此提出了一种新型氦离子化气相色谱法,该方法利用氦离子化检测器,辅以十通阀中心切割及反吹技术,可实现对变压器油中溶解气体7种组分（H₂、CH₄、C₂H₆、C₂H₄、C₂H₂、CO、CO₂）的分离和测定,一次进样分析时间约7 min,各组分的检出限均达到10^-9量级,特别对于特征气体C₂H₂和H₂分别可达5×10^-9和11×10^-9;该方法的重复性约为1%,各组分的线性相关度R²均超过0.99。与传统气相色谱法比较,新型氦离子化气相色谱法操作简便,检测器的出峰信号值大大增强,检出限分别提高了5~80倍,且无需氢气做辅助气,减少了安全隐患。采用氦离子化气相色谱法测定变压器油中溶解气体,对于及时发现特高压变压器内部存在的潜伏性故障有重要意义。

关键词: 特高压变压器, 变压器油, 溶解气体, 气体检测, 氦离子化色谱法

Abstract: Characterized by big volume and large o amount of oil in ultra high-voltage(UHV) transformers, the concentrations of the characteristic dissolved gases relating to malfunctions may become too low to be monitored normally by certain equipment if the detection limit of the testing method is not low enough. Thus a new testing method adopting gas chromatography (GC) with helium ionization detector (PDHID) is proposed, using the technology of helium ionization detector supplemented with ten-port valves, heart cutting and back flush to carry out the separation and analysis for 7 kinds of dissolved gases (H₂, CH₄, C₂H₆, C₂H₄, C₂H₂, CO and CO₂) in single injection within 7 minutes. The detection limit can reach 10-9 grade. Especially for C₂H₂ and H₂, the detection limit can reach 5×10^-9and 11×10^-9, respectively. The repeatability of the method is about 1% with the linearity correlation R² of all the components higher than 0.99. Compared with traditional GC, the new method of GC with PDHID is easier to operate, and the detector has much stronger peaking signal with the detection limit increased by 5-80 times. Moverover, hydrogen is no longer needed as the auxiliary gas such that the potential risk is reduced. Using the method to analyze the dissolved gases in the transformer oil is of great significance to discover the potential internal malfunctions of the UHV transformers in a timely way.

Key words: ultra high-voltage, transformer oil, dissolved gas, gas analysis, gas chromatography with helium ionization detector

中图分类号:

TM411

邓先钦, 彭伟, 厉敏宪, 熊鸣翔, 潘锐, 庄鸿涛, 方华. 应用氦离子化气相色谱法测定变压器油中溶解气体[J]. 中国电力, 2017, 50(10): 148-152.

DENG Xianqin, PENG Wei, LI Minxian, XIONG Mingxiang, PAN Rui, ZHUANG Hongtao, FANG Hua. Determination of Dissolved Gases in Transformer Oil with Gas Chromatographic Helium Ionization Detector[J]. Electric Power, 2017, 50(10): 148-152.

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应用氦离子化气相色谱法测定变压器油中溶解气体

Determination of Dissolved Gases in Transformer Oil with Gas Chromatographic Helium Ionization Detector

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