NDLI: Analysis of power transfer limit considering thermal balance of overhead conductor

Content Provider	IET Digital Library
Author	Dong, Xiaoming Kang, Chongqing Sun, Hua Zhang, Ning
Abstract	Series resistances of overhead transmission lines (OTLs) are largely dependent on the corresponding conductor temperature. The electric current heats the conductor, and the environmental conditions affect the thermal exchange. Therefore, multiple factors related to the thermal balance codetermine the conductor temperature and resistance. However, the traditional power flow analysis neglects the thermal balance effects by treating those related factors as invariables, which may introduce some errors because of the change of the factors. Therefore, in this study, new power flow formulations, which allow for the relationship between the transmission power flow and the thermal balance, are derived. This study demonstrates the errors by applying the new formulations to calculate the power transfer limit (PTL). Moreover, the PTL of the OTL is defined either by encountering the thermal rating (TR) or the steady-state stability limit. A case study based on an equivalent 2-bus test system was used to illustrate the efficacy of the thermal balance that affects the PTLs of both types. In this analysis, this study also reveals the relationship between the TR and steady-state stability limit with various physical and environmental conditions.
Starting Page	2007
Ending Page	2013
Page Count	7
ISSN	17518687
Volume Number	9
e-ISSN	17518695
Issue Number	Issue 14, Nov (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-gtd/9/14
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2014.1113
Journal	IET Generation, Transmission & Distribution
Publisher Date	2015-11-05
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	2-bus Test System Conductor Temperature Electric Current Environmental Condition Inductive Power Transmission Load Flow OTLs Overhead Conductor Overhead Line Conductor Overhead Power Line Overhead Transmission Line Power Flow Analysis Power Overhead Line Power Transfer Limit Analysis PTL Series Resistances Steady-state Stability Limit Thermal Analysis Thermal Balance Effect Thermal Exchange Thermal Rating Transmission Power Flow
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering

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