【摘要】 随着我国特高压输电建设的深入,空气间隙放电的机理研究日益迫切,针对空气间隙放电的电场、电流、流注放电形态等关键物理参数的测量研究最新进展进行了介绍。重点介绍了国内外光电电场测量系统的研究进展,通过测试证实自主研制的瞬态电场测量系统理论测量范围可达24kV/cm,雷电冲击与ns冲击下的时域动态响应试验证实电压与电场的相关系数为0.9946。采用同轴电阻与光电调制传输系统构成的放电电流测量系统,实现了放电起始几十ns级瞬态电流的准确测量,并建立了高速摄像系统研究放电形态。搭建了试验平台,并就流注放电起始阶段空间电场的跃升、瞬态放电电流、流注形态等进行了初步研究,结果表明,研制的测量系统能够满足放电关键物理参数的测量要求,为今后深入开展放电机理研究奠定了坚实的基础。更多还原

【Abstract】 As the development of UHV in China recently,it is very urgent to fundamentally research the long air gap discharge.The nowadays research progress of the measurement system of electric field,transient current and streamer photograph is thus illustrated.First,the different kinds of sensor developed based on pockels effect are introduced,and the integrated electro-optic electric field sensor designed by the authors for intensive electric field measurement is presented.By implementing the output/input performance experiment,it can be found that the measurable amplitude of electric field reaches 24 kV/cm.The dynamic response performance of lightning and ns NEMP impulse is tested carefully,and the results show that the correlation coefficient between imposed impulse voltage and electric field is 0.9946.Combining the resistance with electro-optic modulator,a new transient current measurement system is developed and calibrated.Based on the 1 m rod-plane air gap test platform,the electric field,transient current and shape of streamer are investigated.The experimental results show that these measurement systems are suitable for the impulse electric field,transient current and shape observation of air gap discharge fundamental research.更多还原