Experimental Study on Secondary System Grounding of UHV Fixed Series Capacitors via EMI Measurement on an Experimental Platform

Author

Ma, Qiyan ; Cui, Xiang ; Hu, Rong ; Zhang, Weidong ; Liu, Huiwen ; Zhan, Xiong ; Yu, Jinsong

Author_Institution

State Key Lab. of Alternate Electr. Power Syst. with Renewable Energy Sources, North China Electr. Power Univ. (NCEPU), Beijing, China

Volume

27

Issue

4

fYear

2012

Firstpage

2374

Lastpage

2381

Abstract

In isolating the disconnecting switch of ultra-high voltage (UHV) fixed series capacitors (FSCs), electromagnetic-interference (EMI) problems arise on the secondary-side protection and control devices. If the platform-mounted high-potential secondary system is not properly grounded, malfunction or damage to EMI-vulnerable devices may follow. This paper focuses on high-potential measurement and characterization of EMI in the secondary side of UHV FSC. A life-size experimental platform was built at first, and a corresponding high-potential platform-based measurement system was developed. Then, by isolating the disconnect switch in the experimental circuit, the common-mode (CM) voltage, differential-mode (DM) voltage, and current under five different conditions of secondary system grounding were obtained. In addition, EMI characterization was described and analyzed, and statistical distribution was given. Finally, several proposals based on EMI data and characterization were presented to shed light on designing and engineering UHV fixed series capacitors in addressing EMI problems.

Keywords

circuit breakers; earthing; electromagnetic interference; high-voltage engineering; measurement systems; power capacitors; power system measurement; statistical distributions; EMI measurement; EMI-vulnerable device damage; EMI-vulnerable device malfunction; UHV FSC; UHV fixed series capacitors; common-mode voltage; differential-mode voltage; disconnecting switch isolation; electromagnetic interference problems; high-potential platform-based measurement system; life-size experimental platform; platform-mounted high-potential secondary system; secondary system grounding; secondary-side control devices; secondary-side protection devices; statistical distribution; ultra-high voltage fixed series capacitors; Cable shielding; Current measurement; Electromagnetic interference; Grounding; Power capacitors; Switches; Electromagnetic interference (EMI); high-potential measurement; secondary system grounding; series capacitors (SC); ultra-high voltage (UHV);

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/TPWRD.2012.2212920

Filename

6301794