220kV主变压器总烃超标原因分析及处理

Analysis and Treatment of Total Hydrocarbon Overweight in a 220 kV Main Transformer

对某电厂主变压器本体油色谱进行季度技术监督定期化验时发现变压器内部油总烃超标,总烃体积分数在1000×10-6以上。将发电机停运后,经过内检、吊罩、局放、空载、负载、反充电空载运行等相关检查、试验,发现故障是由于变压器冷却器潜油泵电机故障造成的。更换了电机后变压器油指标恢复正常,并制订了相应的检查措施,以避免再出现同类问题。

Oil total hydrocarbon was found overproof through the main transformer oilchromatogram in a power plant during regular periodic laboratory quarterly technicalsupervision, total hydrocarbon value was above 1000×10- 6. Through internal inspection,cover hanging, PD, no-load test, load trial, reverse transmission on load operation, checkedout the fault cames from the transformer cooler submersible pump motor. After replaceingthe motor, the transformer oil index returned to normal, and formulated correspondingcheck measures to avoid similar problems.