A Regional Protection Partition Strategy Considering Communication Constraints and Its Implementation Techniques

Zhenxing Li, Yang Gong, Lu Wang, Hong Tan, Prominent Lovet Kativu and Pengfei Wang
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Zhenxing Li: College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443000, China
Yang Gong: College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443000, China
Lu Wang: College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443000, China
Hong Tan: School of Electrical Engineering, Chongqing University, Chongqing 400044, China
Prominent Lovet Kativu: College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443000, China
Pengfei Wang: College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443000, China

Energies, 2018, vol. 11, issue 10, 1-15

Abstract: Regional protection based on multisource information of a regional power network depends on communication technology. A partition strategy considering communication constraints and implementation techniques must be considered to realize the regional protection of a large power grid. This paper aims at examining the technical requirements of rapid and reliable regional protection, considering the number of hops as the factor affecting communication between secondary substations and primary substations, and combining this with the equalization of substations. Then, a primary substation selection model of regional protection based on an exhaustive method is proposed using the Floyd–Warshall algorithm (an algorithm for finding shortest paths in a weighted graph). The partition model is further established according to the multifactors that affect the communication delay time for regional protection. Focusing on the N-1 channel fault in the preset region after the formation of the subregions, this paper analyzes the circuitous process of information in an interrupt channel and considers the influence of communication delay time to further improve the partition strategy. Finally, this paper puts forward techniques for partition strategy implementation based on graph theory; an example analysis of an actual power network is also given, and the conclusions of multiple partitions of the same power network are compared and analyzed. Besides this, partition suggestions and theoretical guidance considering actual engineering demands are given.

Keywords: regional protection; communication constraint; partition strategy; graph theory (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
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