一种新型高压电容套管内置式在线监测装置的应用

Study on a Built-in Type on-line Monitoring Devices of High Voltage Capacitance Bushings

高压电容套管的绝缘性能会影响电力系统的安全运行,必须随时掌握套管的绝缘性能。介质损耗因数tanδ是反映绝缘介质损耗大小的特征参量,对高压套管的介损进行实时在线监测可以及时掌握套管的绝缘性能变化情况,判断套管的绝缘状况。本研究对传统在线监测方式进行了改进,将信号采集器放置于套管内部,既增加了抗干扰能力,又不改变套管原有接地方式,提高了监测的灵敏度与可靠性。

The insulating performance of high voltage capacitance bushings can affect the safe operation of the power system, so the insulating performance of the bushing must be known at anytime. The dielectric loss factor tanδ is the characteristic parameters which can reflect the insulating dielectric loss, the insulation performance changes of the bushing can be known and the insulating condition can be judged in time. The traditional on-line monitoring type is improved in this research, the signal collector is put inside the bushing, the anti-interference ability is improved without change the original grounding type of the bushing, which improve the sensitivity and reliability of monitoring.