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Power and Energy Engineering Conference (PEEC 2010 E-BOOK)

Wuhan,China,9.11-9.13，2010

ISBN: 978-1-935068-17-4 Scientific Research Publishing, USA

E-Book 846pp Pub. Date: October 2010

Category: Engineering

Price: $80

Title: Research of Suitable Frequency Band of Transmission Line Model for Pilot Protection
Source: Power and Energy Engineering Conference (PEEC 2010 E-BOOK) (pp 711-718)
Author(s): Xiping Fu, Shannxi Local Electricity (Group) Co,Ltd--Baoji branch company, Baoji, Shannxi Province, China 721000
Zhaozuo Wu, Xi’an Jiaotong University, Xi’an, Shannxi Province, China 710049
Xiaoning Kang, Xi’an Jiaotong University, Xi’an, Shannxi Province, China 710049
Jiale Suonan, Xi’an Jiaotong University, Xi’an, Shannxi Province, China 710049
Hao You, Xi’an Jiaotong University, Xi’an, Shannxi Province, China 710049
Abstract: In the research of relay protection，transmission lines are usually imitated with different mathematical models. But the mathematical model only corresponds with actual physical model approximately when applied in the special frequency band. So it has to consider the suitable frequency band when implementing the relay protection. This paper raises the definition of suitable frequency band of line model applied to pilot differential protection based on parameter identification. And it researches the suitable frequency band of transmission line Π model. It appears that the suitable frequency band becomes narrower with the increase in the length of transmission line, and is irrelevant with the system impendence. Finally, simulations by ATP basically establish the suitable frequency bands of Π model for the transmission lines of different length, providing the criteria for the design of digital filters of pilot differential protection based on parameter identification.
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