Title :
Research on Characteristics of Noncontact Capacitive Voltage Divider Monitoring System Under AC and Lightning Overvoltages
Author :
Shaoqing Chen ; Hanyu Wang ; Lin Du ; Jianming Li
Author_Institution :
Sichuan Electr. Power Res. Inst., Chengdu, China
Abstract :
Transient overvoltage due to lighting and changes of the power system is the main factor that may cause damage to the power system or equipments. Failing logging system and online monitoring system are not capable of well recording the transient overvoltage signal owing to shortcomings including limited sampling rate and electric structure. A new overvoltage transducer based on noncontact capacitor has been developed and it can be applied to overvoltage monitoring. The transmission characteristics when applied to power frequency voltage and lightning impulse voltage have been studied.
Keywords :
HVDC power transmission; lightning protection; overvoltage protection; power capacitors; power system measurement; power transmission protection; transducers; voltage dividers; AC overvoltages; HVDC power transmission system; lightning impulse voltage; lightning overvoltages; limited electric structure; limited sampling rate; noncontact capacitive voltage divider monitoring system; overvoltage transducer; power equipments; power frequency voltage; power system; transient overvoltage signal; Lightning; Power systems; Sensors; Standards; Surges; Transducers; Voltage measurement; Capacitive divider; noncontact; transient overvoltage; transmission characteristics;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2014.2340451
