Download Analysis of voltage sags causes and case analysis

2016China International Conferenceon Electricity Distribution (CICED 2016)
XianSep. 2
Analysis of voltage sags causes and case analysis based on on-site
data
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LI WANG ,WENBO CHEN , CHAOJIE DING2, XUEYI ZOU1
1.
2.
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Golden Cooperate Information & Automation Tech Co.,Ltd – China
State Key Lab of Control and Simulation of Power Systems and Generation Equipment (Department of
Electrical Engineering, Tsinghua University)
Abstract:
Voltage sag and short interruption are increasingly hot spots for the concern of power quality. This paper
presents the application over ten years of more than a thousand sets of voltage-sag protection equipment by
Golden Cooperate in China，covering power plant, petrochemical, coal chemical, chemical fiber and
semiconductor industries. From the original data from on-site equipment and by data mining method, main
causes of voltage sag are analyzed. The analysis results are presented according to various industries and
geographical regions as well as case analysis are discussed. Finally conclusions are given.
1 Introduction
2 Main causes of voltage sag
2.1 Statistic method
2.2 Procedure of data collection
2.3Statistic results and analysis
The main cause of voltage sags of thermal power plants and industrial users in each province are
shown in figure 1-2.
Fig 1 The main cause of voltage sags of thermal power plants in each province
Fig 2 The main cause of voltage sags of industrial users in each province
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2016China International Conferenceon Electricity Distribution (CICED 2016)
XianSep. 2
3 Cases analysis
3.1 Case of coastal area
3.2Case of inland area
3.3Comparison of connecting to various voltage levels
3.4 Influence of voltage sag in distribution grid
4 Conclusion
Voltage sags seriously influence the operation of sensitive industrial loads. This paper analyzes the
main causes of voltage sags in different industries and different areas in China, by the original data and
on-site survey.
The result shows that the main causes of voltage sags in power plants is high-voltage transmission
line faults, given the fact that the configuration and the protection of distribution network in the power
plant are generally rather reliable, while in other industries the causes of voltage sags is mostly natural
disasters and followed by the line faults of their distribution network.
In addition, relevant natural disasters are mainly strong winds and severe snow in northwest and
northeast in China, and lightning, typhoons and other severe convective weather in the southeast
coastal region in China. Moreover, the reliability of distribution network significantly influences their
industry users.
The analysis results may offer a reference for sensitive industrial users particular in China to the
treatment strategy of voltage sags.
Key words:
voltage sags, short interruption, cause of voltage sags, case analysis
Author’s brief introduction and contact information
Li Wang, (1987- ), master degree, Golden Cooperate information& automation technology Co., Ltd,
research direction is power system relay protection and safety automatic device.
Wenbo Chen, (1974- ), bachelor, engineer, Golden Cooperate information& automation technology
Co., Ltd, research direction is DC power distribution, AC/DC hybrid microgrid, voltage sag protection.
Chaojie Ding, (1991- ),master degree student in Department of Electrical Engineering, Tsinghua
University. Research directionsare DC power distribution and demand response integration.
Li
Wang
Mobile: 18921408752
Email: [email protected]
Fax: 025-52103128-816
Address: No.28, Shengli Rd., Jiangning Economic Development District, Nanjing, China
P.C.: 21110
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