| 影响变压器绝缘故障的主要因素 |
| 添加时间：2017/9/5 16:26:06 浏览次数： |
| 影响变压器绝缘故障的主要因素 The main factors affecting the insulation fault of transformer 影响变压器绝缘性能的主要因素有：温度、湿度、油保护方式和过电压影响等。 The main factors that affect the transformer insulation performance are temperature, humidity, oil protection mode and over-voltage influence. 1、温度的影响。 1, the influence of temperature. 电力变压器为油、纸绝缘，在不同温度下油、纸中含水量有着不同的平衡关系曲线。一般情况下，温度升高，纸内水分要向泊中析出;反之，则纸要吸收油中水分。因此，当温度较高时，变压器内绝缘油的微水含量较大;反之，微水含量就小。 The power transformer is oil and paper insulation, and the water content in the oil and paper has different balance curves at different temperatures. Under normal circumstances, the temperature increases, the moisture inside the paper should be transferred to the park; on the contrary, the paper should absorb moisture in the oil. Therefore, when the temperature is high, the micro water content of the insulating oil in the transformer is larger; on the contrary, the micro water content is small. 温度不同时，使纤维素解环、断链并伴随气体产生的程度有所不同。在一定温度下，CO和CO₂的产生速度恒定，即油中CO和CO₂气体含量随时间呈线性关系。在温度不断升高时，CO和CO₂的产生速率往往呈指数规律增大。因此，油中CO和CO₂的含量与绝缘纸热老化有着直接的关系，并可将含量变化作为密封变压器中纸层有无异常的判据之一。 When the temperature is different, the cellulose is broken and broken, and the degree of gas production varies. Under certain temperature, CO and CO produced at a constant speed, namely CO and CO gas content in oil with time is linear. When the temperature rises, the production rate of CO and CO often exponentially. Therefore, the content of CO and CO in the oil and paper insulation thermal aging has a direct relationship, and the content changes as the seal paper layer are one of the criterion of transformer abnormal. 2、湿度的影响。 2, humidity influence. 水分的存在将加速纸纤维素降解。因此，CO和CO₂的产生与纤维素材料的含水量也有关。当湿度一定时，含水量越高，分解出的CO₂越多。反之，含水量越低，分解出的CO就越多。 The presence of moisture will accelerate the degradation of paper cellulose. Therefore, with CO and CO the cellulose material moisture content of about. When the humidity is constant, the higher the water content, the more decomposition of CO. Conversely, the lower the water content, the more CO it decomposes. 绝缘油中的微量水分是影响绝缘特性的重要因素之一。绝缘油中微量水分的存在，对绝缘介质的电气性能与理化性能都有极大的危害，水分可导致绝缘油的火花放电电压降低，介质损耗因数tg8增大，促进绝缘油老化，绝缘性能劣化。而设备受潮，不仅导致电力设备的运行可靠性和寿命降低，更可能导致设备损坏甚至危及人身安全。 The moisture content in insulating oil is one of the important factors that affect the insulation characteristics. Trace water in the presence of insulating oil, have great harm on the electrical properties of dielectric and physicochemical properties, leading to the spark discharge voltage of insulating oil can reduce the moisture, the dielectric loss factor of Tg8 increases, accelerate the aging of insulating oil, insulation deterioration. And equipment damp, not only lead to the reliability and life of power equipment to reduce, more likely to cause damage to equipment, and even endanger personal safety. |
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