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《Electric Power》 2017-03
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Voltage Sag Source Locating Method Based on Similarity Measure of Intuitionistic Fuzzy Rough Sets

WU Danyue;Electric Power Science Research Institute of State Grid Fujian Electric Power Company;  
In order to distinguish responsibility,coordinate dispute mitigation,and facilitate fault detection,diagnosis and mitigation measures,it is necessary to locate the voltage sag in system.A voltage sag source location method based on intuitionistic fuzzy rough sets is proposed.The nodal impedance matrix is obtained according to network topology and system parameters.The positive sequence voltages of monitoring points when line faults occur are calculated using impedance matrix.A database of identification information of voltage sag is established.Using measurement information collected by power quality monitoring devices,the intuitionistic fuzzy rough sets and the positive ideal intuitionistic fuzzy rough sets of each line are constructed.The similarity of the two sets of each line is calculated.Then the line with maximal similarity value is judged as the fault line.Simulation results in the standard IEEE 30-bus test system verify the validity and accuracy of proposed method.The method has clear physical meaning and easy implementation,which can be adopted in engineering practice.
【CateGory Index】: TM714.2
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