摘要
提出了一种利用内置式D.dot传感器监测局部放电进而评估设备绝缘状态的新方法,与HFCT测得的局部放电信号对比,证明了D.dot传感器的可靠性。探索和尝试了对实际放电量的评估和计算方法。研究了不同绝缘缺陷下D.dot传感器的吸收能量和脉冲电流法测量到的实际放电量的关系。研究表明,传感器吸收的能量和放电源实际放电量之间存在着一定的二次函数关系,可以利用两者的散点分布图对缺陷类型进行识别。该传感器成本低、结构简单、易于安装,符合智能电网测量传感器智能化、小型化的发展要求。
A non-contact smart device （D.dot） for partial-discharge （PD） measurements has been introduced in this paper. The D. dot sensor＇s reliability has been confirmed through comparison with high frequency current transformer （HFCT）. This paper makes an attempt to quantify the apparent discharge quantities and has studied the relation between the energy of signal captured by the D.- dot sensor and the apparent discharge quantities calculated from signal of current pulse sensor. The result shows that a quadratic function relation exists between the energy absorbed by the D.dot sensor and the apparent discharge quantities, which is helpful to identify the type of discharge fault. The D.dot sensor is low-cost, simple, easy to install and conforms to the development requirements of intelligence and miniaturization of the smart grids measuring sensor.
出处
《陕西电力》
2016年第4期46-50,共5页
Shanxi Electric Power
关键词
开关柜
局部放电
内置式传感器
放电量计算
小型化
switchgear
partial discharge
non-contact device
discharge quantities
miniaturization
