导线交流电晕放电的空间电荷特征量分析  

Analysis of Characteristic Quantities of Space Charges in AC Corona Discharge

作　　者：路锦河 杜林[1] 姜凯华 王誉博 张科 LU Jinhe;DU Lin;JIANG Kaihua;WANG Yubo;ZHANG Ke(State Key Laboratory of Transmission and Distribution Equipment and System Safety and New Technologies(Chongqing University),Shapingba District,Chongqing 400030,China;State Grid Zhejiang Electric Power Co.,Ltd.Electric Power Research Institute,Hangzhou 310000,Zhejiang Province,China;Tangshan Power Supply Company of State Grid Jibei Electric Power Co.,Ltd.,Tangshan 063000,Hebei Province,China)

机构地区：[1]输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆市沙坪坝区400030 [2]国网浙江省电力有限公司电力科学研究院,浙江省杭州市310000 [3]国网冀北电力有限公司唐山供电公司,河北省唐山市063000

出　　处：《中国电机工程学报》2021年第24期8619-8630,共12页Proceedings of the CSEE

摘　　要：导线电晕放电与空间电荷密切相关,研究空间电荷的变化有助于分析电晕放电本质。该文搭建交流电压电晕笼试验平台,利用接地电容与导线和电晕笼构成的杂散电容形成串联分压电路,测量起晕前后的导线电压和电晕笼壁电压。根据电流连续性原理推导得到空间电荷表达式。试验结果表明,空间电荷导致电晕笼壁电压畸变,正负半周波形具有不对称性,波形正负峰值大小与电压幅值成正相关,与电压频率和导线半径成负相关。电晕笼壁电压可以作为宏观特征量反映空间电荷的变化。进一步提取空间电荷峰值、空间电荷峰值时延以及空间电荷增长速率作为交流电晕低频特征量,定量分析了导线电晕放电过程中空间电荷的变化。The corona discharge of the wire is closely related to the space charge. Studying the change of space charge helps to analyze the nature of corona discharge. In this paper, an AC voltage corona cage experimental platform was built, and a series voltage divider circuit was formed by using a grounding capacitor and the stray capacitance formed by the wire and the corona cage, and measured wire voltage and corona cage wall voltage separately. The space charge expression was derived based on the principle of current continuity. The experimental results show that the space charge causes distortion of the grounding capacitor voltage, and the positive and negative half-cycle waveforms have asymmetry.The positive and negative peak values of this waveform were positively correlated with the voltage amplitude and negatively correlated with the voltage frequency and wire radius. The wall voltage of the corona cage could be used as a macroscopic characteristic quantity to reflect the change of space charge.The peak value of space charge, the space charge peak delay and the rate of space charge generation were extracted as low frequency characteristic quantities, and quantitatively analyzed the space charge characteristics of AC corona discharge on wires.

关 键 词：交流电晕放电 电晕笼实验 空间电荷 特征量分析 

分 类 号：TM851[电气工程—高电压与绝缘技术]