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变压器的异常运行及处理方法

01
“变压器”的异常运行及处理方法
Abnormal operation and processing method of transformer
山东变压器厂家http://www.jnwdsh.com变压器运行时出现的异常情况主要有:上层油温超限,油色油位异常,气体继电器报警,冷却系统故障及色谱分析不正常等。运行人员发现变压器异常运行时,应及时分析其原因,性质及影响,采取适当的处理措施,以防故障扩大,保护变压器的安全运行。
Abnormal situation during the operation of the transformer are: the top oil temperature gauge, oil level anomalies, gas alarm relay, cooling system fault analysis and abnormal chromatography. Operators found that the transformer abnormal operation, should promptly analyze its causes, nature and impact, take appropriate measures to prevent failure to expand, to protect the safe operation of transformers.
02
02
上层油温升高
Upper oil temperature rise
1. 检查变压器的负荷和冷却介质的温度是否发生了较大幅度的变化,并根据有关技术记录,与该负荷和冷却介质温度应有的油温进行比较。
1., check the transformer load and cooling medium temperature has changed greatly, and according to the relevant technical records, and the load and cooling medium temperature should be compared to the oil temperature.
2. 检查变压器的冷却装置是否发生故障,如风扇,油泵是否运行正常,冷却水压是否正常,冷却装置电源是否投入或切换正常。
2. check whether the cooling device of the transformer is out of order, such as whether the fan, the oil pump is running properly, whether the cooling water pressure is normal or not, whether the cooling unit power is put in or switched normally.
3. 核对表计及其回路是否正常。将现场表计数值与遥测量进行比较,比较的结果应以温度较高者作为控制变压器温度的依据。
山东变压器
3. check the meter and its circuit is normal. Comparing the field meter value with the remote measurement, the result of comparison should be based on the higher temperature as the basis for controlling the transformer temperature.
4. 若发现油温较平时同样负荷和冷却条件下高出5~10℃且不断上升,冷却器运行正常,则认为变压器已发生故障,应立即联系调度将变压器停运。
4., if the oil temperature is found to be higher than usual, under the same load and cooling conditions, the temperature is higher than 5~10 DEG C and continues to rise, and the cooler is running normally, the transformer has been found to be out of order, and the transformer shall be stopped immediately.
03
03
油位异常
Abnormal oil level
正常情况下,变压器的油位随温度的变化而变化。而油温则取决于变压器所带负荷的多少,周围环境温度和冷却系统的运行情况。如果变压器有关部分发生渗漏时,油位将会相应降低。变压器油位异常主要有两种情况:
Under normal circumstances, the oil level of the transformer varies with the temperature. The oil temperature depends on how much load the transformer carries, the ambient temperature and the operation of the cooling system. If leakage occurs in the relevant part of the transformer, the oil level will decrease accordingly. There are two kinds of abnormal oil level in transformer:
1. 油位过高。原因为变压器长期受高温的影响,受热膨胀,使油位上升;加油时油位偏高;变压器进水。油位太高时会引起溢油,因此,发现油位高时,应及时通过检修人员进行放油处理,但应控制油位与当时的油温相对应。
1. oil level is too high. The reason is that the transformer is affected by high temperature for a long time, it expands when heated, and makes the oil level rise. When the oil is in high oil, the transformer enters the water. When the oil level is too high, it will cause oil spill. Therefore, when the oil level is found high, the oil drain should be carried out by the maintenance personnel in time, but the oil level should be controlled at the same time as the oil temperature at that time.
2. 油位过低。主要原因有变压器漏油;变压器负荷突然降低或外界环境温度明显降低时;强迫油循环导向冷却变压器的冷却渗油,导致变压器油渗入水中较长时间。一般来说,变压器的油位不会在很短的时间大量渗漏。运行人员应随时监控变压器油位的变化情况。
2. oil level is too low. The main reasons are oil leakage of transformer, sudden decrease of transformer load or obvious decrease of ambient temperature. The forced cooling of oil circulation guiding cooling transformer leads to transformer oil seeping into water for a long time. Generally speaking, the oil level of the transformer will not leak much in a very short time. The operator shall monitor the oil level changes of the transformer at any time.
当油位低于气体继电器时将报警。油位太低时,可能使铁芯绕组直接与空气接触,后果相当严重。主变油位异常降低时要全面检查,有无漏油,事故排油阀是否被误打开或漏油,并及时制止。
When the oil level is lower than the gas relay, the alarm will be taken. When the oil level is too low, the core winding may be directly exposed to the air and the consequences will be severe. When the oil level of the main transformer is abnormally lowered, a comprehensive check shall be made to see whether there is any oil leakage, whether or not the accident drain valve has been mistakenly opened or leaking, and promptly stopped.
  
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