司马文霞，兰海涛，杜 林，孙才新，姚陈果，杨 庆
(重庆大学电气工程学院高电压与电工新技术教育部重点实验室，重庆市 沙坪坝区 400044)
Study on Response Characteristic of Voltage Sensor Mounted at the Tap of Transformer Bushing
SIMA Wen-xia，LAN Hai-tao, DU Lin, SUN Cai-xin, YAO Chen-guo, YANG Qing
(Key Laboratory of High Voltage Engineering and Electrical New Technology, Ministry of
Education, Chongqing University, Shapingba District, Chongqing 400044, China)

ABSTRACT: Study on the response characteristic of the sensor mounted at the tap of transformer bushing is significant to the development of an on-line overvoltage monitoring device for power system, which is based on the tap capacitive divider of transformer’s bushing. The structure and parameters of the sensor are introduced. According to the feature of structure of capacitive bushing, the equivalent circuit models of capacitive bushing and other units of the whole capacitive divider system are established and all units’ parameters are presented. The square wave response characteristic of the sensor is analyzed by use of the simulation software Saber. The experimental results verify the effectivity of the modeling and
the correctness of simulation results.
KEY WORDS: capacitive bushing; voltage sensor;overvoltage; response characteristic; online monitoring
摘要：研究套管末屏电压传感器的输出响应特性对研制基于变压器电容式套管分压的电力系统过电压实时在线监测装置具有十分重要的意义。该文首先介绍套管末屏电压传感器的结构和参数，根据电容式套管的结构特点，建立电容式套管以及整个分压系统其它元件的等效电路模型，并详细论述了电路模型中各元件参数的计算方法，得到整个分压系统等效网络；运用Saber 软件对该传感器在方波信号激励下的输出响应特性进行了仿真计算，得出该传感器的方波响应特性；最后实测数据验证了模型的有效性和仿真结果的正确性。
关键词：电容式套管；电压传感器；过电压；响应特性；在
线监测