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| A Novel Graphic Characteristic Based Method for Topology Analysis in Substations and Power Plants |
| Wang Zengping, Zhang Jinfang, Zhang Yagang |
| State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China |
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Abstract The traditional matrix-based typical process of substation configuration needs to gain the complete adjacent matrix from the original one by a plenty of logical calculation. However, there are some disadvantages in this process, such as large logical calculation in online analysis and low efficiency in tracking the state status change of the switches. In this paper, having taken into consideration of the graphic characteristics of all kinds of the main electrical connections in substations, the mapped node-branch graphs from main connections are classified into three types: single branch, two branches in-parallel and multi-branches in-parallel. Furthermore, a unified approach is proposed to obtain the connected routes sets between the arbitrary two nodes of main connections. As to the value of the non-diagonal element in complete connected matrix, the set of connected routes is used as the function formation with the branches statues as independent variables. In this way, the element value could be determined by the connected routes functions with substituting the real time open-close status of the branches. The repeated solving process of the traditional matrix methods is avoided by the novel way, and the connected functions set could be formed off-line to save the online topology analysis time. The example result shows that the new method is able to finish the original topology analysis and track the state status of switches accurately and rapidly.
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Received: 12 July 2010
Published: 19 March 2014
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2012, Vol. 27 
