Research on differential protection for micro-grid usingfailure message with direction information |
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Authors: | ZHOU Nian cheng HUANG Rui WANG Rui han and RAN Biao |
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Institution: | State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University,Chongqing 400044,P.R. China;State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University,Chongqing 400044,P.R. China;Yunnan Power Grid Corporation Yuxi Power Supply Bureau,Yuxi 653100, Yunnan, P.R. China;Chengdu Electric Power Bureau,Chengdu 611130,Sichuan, P.R. China |
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Abstract: | Considering traditional current protection cannot satisfy the micro-grid, a system protection solution for the micro-grid is proposed. In this solution, the failure message with direction information can be exchanged among the adjacent protection units, so the fault coverage can be determined and the fault can be quickly cleared. By analyzing the movement of the protection in three kinds of fault conditions in the micro-grid that contains three branches and two micro-power based on inverter, the method has been proved that the fault can be quickly cleared and the protection has the same protection strategies for both islanded and grid-connected operation. |
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Keywords: | micro-grid relay protection micro-source fault information |
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