电磁式电压互感器冲击电压响应特性试验研究  

Experimental Study on the Impulse-voltage Transmission Characteristics of Inductive Voltage Transformers

作　　者：刘翔[1] 郭克勤[1] 叶国雄[1] 黄华[1] 杨帆[1] 陈鹏[1] 

机构地区：[1]国网电力科学研究院,武汉430074

出　　处：《高电压技术》2011年第10期2385-2390,共6页High Voltage Engineering

摘　　要：对于电力系统的继电保护来说,暂态量保护能大大提高保护的动作时间,要实现暂态量超高速线路保护就必须掌握各类互感器的传输特性。通过高压冲击试验,研究电磁式电压互感器的传输特性,讨论通过其进行暂态量线路保护的可行性。试验研究表明,电磁式电压互感器在冲击电压响应过程中存在明显的静电感应现象,可以无时延地传输一次侧脉冲的信号和极性,基于此可以构建新型的行波保护方法;在相同时间参数冲击电压下,电磁式电压互感器绕组的传递函数为一线性函数;且随着一次侧冲击电压波头时间变小,二次电压波形中自由振荡过程时间变长,振荡幅值变大。For the relay protection of a power system, the transient-based protection can improve the protection operation time, so it is necessary to study the transmission characteristics of instrument transformers. The impulse-voltage transmission characteristics of inductive voltage transformers were studied through the high voltage impulse. Results reveal that, the electrostatic induction in the transmission progress can transfer the signal and polarity of the impulses from primary windings with no tlme-delay, the transmission function of the inductive voltage transformers＇ windings is a linear function, and the value and time of the free oscillation in the secondary waveform increase with the deerease of the front time of the impulse from the primary winding.

关 键 词：暂态量保护 电磁式电压互感器 冲击电压 传输特性 静电感应 电磁感应 自由振荡 

分 类 号：TM451[电气工程—电器]