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首页> 外文会议>Third Beijing International Conference on Power Transmission amp; Distribution Technology 2001; Nov 26-30, 2001; Beijing >Temperature and Overload Capability Monitoring for Power Transformers
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Temperature and Overload Capability Monitoring for Power Transformers

机译：电力变压器的温度和过载能力监控

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摘要

The life expectancy of oil immersed cellulose insulation material mainly depends on its thermal load. Up to now cellulose insulation is used in most power transformers. To take special attention on the behavior of power transformers a monitoring system was developed. The system measures the current load, the voltage, some typical temperatures, the tap changer position and the state of fans and pumps of all cooling units. Additional the output signal of a gas-in-oil sensor and an oil humidity sensor is evaluated. This paper describes the both the hardware setup and the monitoring algorithms used in the system. In order to determine the winding temperature distribution with improved accuracy a thermal model has been designed. By combining a thermal winding model with an on-line monitoring system the determination of the overload capability becomes possible.
机译：油浸纤维素绝缘材料的预期寿命主要取决于其热负荷。到目前为止，大多数电力变压器都使用纤维素绝缘材料。为了特别注意电力变压器的性能，开发了一个监视系统。该系统测量当前负载，电压，一些典型温度，分接开关位置以及所有冷却单元的风扇和泵的状态。此外，还评估了油中气体传感器和油湿度传感器的输出信号。本文介绍了系统中使用的硬件设置和监视算法。为了确定精度更高的绕组温度分布，设计了一个热模型。通过将热绕组模型与在线监测系统相结合，可以确定过载能力。

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