数字化跨间隔电能计量系统的现场多维测试技术

Multidimensional field test technology for digital multiple bay electric energy metering system

为解决智能变电站电量计量不平衡问题,针对数字化跨间隔电能计量系统涉及环节较多、实验室测试存在盲区、现场检测手段匮乏等特点,提出一种用于变电站现场实施的跨间隔电能计量多维测试技术。分析数字化跨间隔计量异常的主要原因,提出基于无线传输的间隔化注入测试方法及其实现方案,对分布式终端同步、被动采样的精确触发及采样曲线拟合等关键技术进行描述。由实验结果可知,该测试方法在保持被测系统架构完整性的前提下,实现跨间隔电能误差定位及相关性能检测,有助于提升数字化计量专业的现场调试检修能力。

For the purpose of solving the unbalanced problem of power metering in the smart substation, a multidimensional field test technology is proposed for multiple bay electric energy metering in substation in view of the characteristics of digital multiple bay electric energy metering system is considered such as many links involved, blind areas in laboratory testing and lack of field test means. Firstly, the main reason of abnormal measurement is analyzed for the digital multiple bay. Then, a bay injection test is proposed on the basis of the wireless transmission and the implementation scheme and the key issues is described such as the distributed terminal synchronization, precise trigger of passive sampling and sampling curve fitting. Finally, the proposed scheme is verified by experiments. It is shown that the method could realize the error location and performance test of multiple bay electric energy under the condition of maintaining the integrity of the system and the field test ability of digital metrology specialty is improved.