An Approximate Load Flow Calculation Method for the Contingency Selection of Double Transmission Line Outage
Contingency selection is an important part of online contingency analysis. The number of combinations of N-2 outages increases dramatically as the number of circuit increases, and therefore, fast and accurate algorithms are needed for the selection of double transmission line outages. Based on the authors’ previous work on single line outage, this paper proposes a mathematical formulation for the efficient implementation of the first iteration of the Newton load flow following a double line outage, which takes full advantage of the known factors of the pre-contingency base case Jacobian matrix and the sparsity of nodal power mismatches vectors. Based on this, an approximate load flow calculation method has been proposed for the selection of double transmission line outage. Although the proposed method is more time consuming than the commonly used 1P-1Q calculation, yet its accuracy makes it a suitable candidate for applications where post-contingency voltage magnitudes are of major concern and/or more accurate approximations of load flow results are needed. This has been demonstrated through simulation results in three standard test systems.
Contingency Selection 1P-1Q Calculation Method Newton Load Flow Jacobian Matrix
Z. J. Meng Y. Xue K. L. Lo
Nanjing Automation Research Institute, Nanjing 210003, P. R. China University of Strathclyde, Glasgow G1 1XW, UK
国际会议
The International Conference on Electrical Engineering 2009(2009 电机工程国际会议)
沈阳
英文
1-6
2009-07-05（万方平台首次上网日期，不代表论文的发表时间）