基于臭氧检测法的电晕起始电压测量方法

Measurement Method of Corona Onset Voltage Based on Ozone Detection Technology

起晕电压测量是金具电晕特性研究的一个重要方面,为了实现起晕电压的准确测量,结合理论分析与实验验证提出了一种基于臭氧检测的起晕电压测量方法。通过对电晕过程中臭氧产生的化学机理分析,论证了该方法的可行性,并从激发能量和干扰因素等方面将臭氧检测法与紫外光检测法进行了对比。通过搭建相应平台,采用臭氧检测的方法测量了2种尺寸的棒电极在棒-板间隙结构下的负极性起晕电压。结果表明:臭氧检测法切实可行,且具有灵敏度高、抗干扰能力强等优点;采用臭氧检测的测量结果同预测精度较高的光电离模型预测结果一致,证明了测量方法的有效性。所提出的方法可用于实验室中小尺寸电极起晕电压的准确测量。

Corona onset voltage measurement is an important aspect of researching the corona characteristics of power fittings. In order to obtain accurate corona onset voltages, we proposed a new method based on ozone detection by combining theoretical analysis and experimental verification. The feasibility of this method was discussed by chemical mechanism analysis on the generation of ozone during corona discharge. The ozone detection method was compared with the ultraviolet detection method from the aspects of excitation energy and interference factors.Moreover, a measurement platform of ozone detection method was established in the laboratory, and the corona onset voltages of rod-plate gaps with 2 types of rod electrodes under negative DC voltage were measured. The results show that the ozone detection method is feasible and has the advantages of high sensitivity and strong anti-interference ability; the measurement results well agree with the calculated results obtained by photoionization model, proving the efficiency of the proposed method. This method can be used for accurate measurement of corona onset voltage of small electrodes in laboratory.