Dynamic Line Rating estimator with synchronized phasor measurement

New Dynamic Line Rating (DLR) estimator with synchronized phasor measurement is proposed. This estimator exploits the reaction of the transmission line amongst its electrical, thermal and mechanical models to estimate the real time conductor. This includes current carrying capacity, the final temperature of conductor and the time to violate the conductor's thermal limitation. Such information provides useful reference to the system operators to take actions aiming at increasing power transfer capability and enhancing system security and economic performance. The performance is evaluated under various weather conditions and different configurations of the proposed algorithm. The evaluation results indicate that the proposed algorithm can achieve accurate DLR under various weather conditions and provides an economic, efficient and accurate means to improve the transfer capacity compared with existing methods.

[1]  Z. Bo,et al.  Dynamic phasor and frequency estimator for phasor measurement units , 2010 .

[2]  D. A. Douglass,et al.  Real-time monitoring and dynamic thermal rating of power transmission circuits , 1996 .

[3]  W. J. Steeley,et al.  Ambient temperature corrected dynamic transmission line ratings at two PG&E locations , 1991 .

[4]  Ramesh Rayudu,et al.  Dynamic rating of transmission lines-a New Zealand experience , 2000, 2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077).

[5]  R. Adapa,et al.  Dynamic thermal ratings: monitors and calculation methods , 2005, 2005 IEEE Power Engineering Society Inaugural Conference and Exposition in Africa.

[6]  B. S. Howington,et al.  Dynamic Thermal Line Rating Summary and Status of the State-of-the-Art Technology , 1987, IEEE Transactions on Power Delivery.

[7]  Tony Yip,et al.  Dynamic line rating protection for wind farm connections , 2009 .

[8]  S. P. Basu,et al.  Design, installation, and field experience with an overhead transmission dynamic line rating system , 1996, Proceedings of 1996 Transmission and Distribution Conference and Exposition.

[9]  존 엔겔하트,et al.  A power line temperature and sag monitor system , 2007 .

[10]  R. F. Chu.  LINES FOR DYNAMIC THERMAL LINE RATING SYSTEM IMPLEMENTATION , 1992 .

[11]  S. D. Foss,et al.  Effect of variability in weather conditions on conductor temperature and the dynamic rating of transmission lines , 1988 .

[12]  F.D. Galiana,et al.  Electrothermal coordination part II: case studies , 2005, IEEE Transactions on Power Systems.

[13]  A.G. Phadke,et al.  Synchronized phasor measurements in power systems , 1993, IEEE Computer Applications in Power.

[14]  Jin-O Kim,et al.  Decision of transmission line rating based on assessment of Thermal Overload Risk , 2006, 2006 Eleventh International Middle East Power Systems Conference.

[15]  M. Michael,et al.  Elongation of overhead line conductors under combined mechanical and thermal Stress , 2008, 2008 International Conference on Condition Monitoring and Diagnosis.

[16]  F.D. Galiana,et al.  Electrothermal coordination part I: theory and implementation schemes , 2005, IEEE Transactions on Power Systems.

[17]  D. A. Douglass,et al.  An experimental evaluation of a thermal line uprating by conductor temperature and weather monitoring , 1988 .

[18]  Z.Q. Bo,et al.  A Dynamic Synchrophasor Estimation Algorithm for Online Application , 2010, IEEE Transactions on Power Delivery.

[19]  Zhengyou He,et al.  A maximum likelihood based dynamic synchrophasor estimator for online purpose , 2009, 2009 IEEE Power & Energy Society General Meeting.

[20]  Vincent Del Toro,et al.  Principles of electrical engineering , 1965 .