【摘要】 介绍了 XC- 1 1型现代输电线路行波故障测距装置的构成及工作原理 ,并总结了该装置自1 995年以来在我国电网中的运行经验。该装置直接采集常规电流互感器二次电流信号 ,并采用 3个独立的单片机系统分别完成高速数据采集与处理、GPS时间同步与锁定以及通信和人机对话等功能。装置实现了 A,D,E等 3种现代行波故障测距原理 ,其中 A型和 E型均为单端原理 ,而 D型为双端原理。运行经验表明 ,该装置具有较高的可靠性、准确性及性能价格比 ,其平均绝对测距误差不超过 40 0 m,最大绝对误差不超过 90 0 m。更多还原

【Abstract】 The structure and operating principle of XC 11 type modern travelling wave based transmission line fault locator are introduced. The operating experience of the fault locator in China electrical power systems since 1995 is also summarized. The data acquisition of current transient from the traditional current transformer, the high speed data processing, GPS based time synchronizing and locking, and man machine dialog etc., are accomplished by three independent singlechip based computer systems respectively. The problems encountered in the past, such as mal starting, excessive error with single end measuring, are overcome by raising threshold of starting value and applying three different location principles. The on site operating experience shows that the presented locator has high reliability, accuracy and performance price ratio. The average absolute location error of the locator is less than 400 meters, and the maximum absolute error is less than 900 meters.更多还原