Affiliations: [a] State Key Laboratory of Power Transmission Equipment
and System Security and New Technology (Chongqing University), Chongqing,
China | [b] Sichuan Electrical Power Corporation Metering Center,
Chengdu, Sichuan, China
Correspondence:
[*]
Corresponding author: Jie Yang, State Key Laboratory of Power
Transmission Equipment and System Security and New Technology (Chongqing
University), Shapingba District, Chongqing 400044, China. Tel./Fax: +86
18323641369; E-mail: mdyangjie@163.com
Abstract: Online transformer monitoring and protective relaying require
voltage sensors with fast response and high precision. Traditional devices,
such as resistive and capacitive dividers, have disadvantages in measuring
transient voltage, e.g., oscillation, narrow bandwidth, and large size. This
paper introduces a new D-dot probe for transient measurement. The difference
input circuit structure is presented on the basis of the operating principle of
the D-dot probe. Paralleled multiple electrodes are applied to gain the mutual
capacitance value of the probe to achieve a large divide ratio and make the
probe work in a self-integrating mode. Pspice simulation is conducted to find a
way to minimize probe error. The probe is manufactured into printed circuit
boards (PCB). The steady state linearity and transient response of the probe
are tested. Results show that the probe has fast response and broad bandwidth.
