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A New Method for Setting Calculation Sequence of Directional Relay Protection in Multi-Loop Networks

  • Xiong Haijun

    Xiong Haijun, male, born in 1980, PhD, lecturer, research interests includes the Electric Power System Automation, Network Protocol Engineering.

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    and Zhang Qi

    Zhang Qi, female, born in 1980, Master, lecturer, research interests include Intelligent Information Processing, Network Protocol Engineering.

Published/Copyright: June 2, 2016

Abstract

Workload of relay protection setting calculation in multi-loop networks may be reduced effectively by optimization setting calculation sequences. A new method of setting calculation sequences of directional distance relay protection in multi-loop networks based on minimum broken nodes cost vector (MBNCV) was proposed to solve the problem experienced in current methods. Existing methods based on minimum breakpoint set (MBPS) lead to more break edges when untying the loops in dependent relationships of relays leading to possibly more iterative calculation workloads in setting calculations. A model driven approach based on behavior trees (BT) was presented to improve adaptability of similar problems. After extending the BT model by adding real-time system characters, timed BT was derived and the dependency relationship in multi-loop networks was then modeled. The model was translated into communication sequence process (CSP) models and an optimization setting calculation sequence in multi-loop networks was finally calculated by tools. A 5-nodes multi-loop network was applied as an example to demonstrate effectiveness of the modeling and calculation method. Several examples were then calculated with results indicating the method effectively reduces the number of forced broken edges for protection setting calculation in multi-loop networks.

About the authors

Xiong Haijun

Xiong Haijun, male, born in 1980, PhD, lecturer, research interests includes the Electric Power System Automation, Network Protocol Engineering.

Zhang Qi

Zhang Qi, female, born in 1980, Master, lecturer, research interests include Intelligent Information Processing, Network Protocol Engineering.

Acknowledgment

This project supported by National Natural Science Foundation of China (61074078) and Chinese Universities Scientific Fund (2014MS126).

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Published Online: 2016-6-2
Published in Print: 2016-8-1

©2016 by De Gruyter

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