【摘要】 雷电参数测量是高压输电线路防雷设计的基础和实现电网主动性防雷技术的前提。介绍了一种雷击闪络电流传感器的研制过程,及其解决的主要问题,给出了研究成果。根据110 kV同杆双回线路反击和绕击时闪络电流的频谱确定了传感器的测量频带,并根据光纤传输系统发光管和接收管特性确定了光学电路的参数。在实验室通过冲击大电流试验,研究了传感器及测量系统的准确性、稳定性和线性度。试验结果表明,该测量系统能够准确反映各种波形的冲击电流的幅值,并且具有很好的稳定性和线性度。更多还原

【Abstract】 The measurement of lightning parameter is the base of lightning protected design and prerequisite for achieving of lightning protected technology in high voltage transmission lines.The paper introduces the development process of a new lightning flashover current sensor and main problem solved,and gives the research result.Taken a 110 kV Double Circuit transmission line as an example,the frequency spectrum of back flashover current and shield fault current was analyzed to decide the frequency band of the sensor.At laboratory tests of large impulse current were carried on to study the accuracy,stability and linearity of the measurement system.The results indicated that the system can get the accurate amplitude of every shape of impulse current,and has very good stability and linearity.更多还原