Title :
The research of fault diagnosis in grounding grids
Author :
Xu, Huizhong ; Cao, Jun
Author_Institution :
Dept. of Electr. Eng, Nanjing Inst. of Ind. Technol., Nanjing, China
Abstract :
According to the theory analysis and research, the fault equation to find out the broken and corroded conductors of the grounding grid is built by the sensibility analysis method. And the fault equation is solved by applying the optimization theory and the lowest energy principle. The increased value of each branch resistance is calculated according to constraint condition, objection function and fault equation. The fuzzy method is used to deal with several groups of data in order to improve the accuracy. According to the method, it can diagnose the different grounding grids, the factors and structure of which are varied. This method is verified by the simulation calculation and analog experiment.
Keywords :
conductors (electric); earthing; fault diagnosis; fuzzy set theory; optimisation; power grids; sensitivity analysis; branch resistance; corroded conductors; fault diagnosis; fault equation; fuzzy method; grounding grids; objection function; optimization theory; sensibility analysis method; Educational institutions; Equations; Fault diagnosis; Grounding; Mathematical model; Resistance; Voltage measurement; fault diagnosis; fuzzy method sensitivity matrix; grounding grid; nonlinear function;
Conference_Titel :
Innovative Smart Grid Technologies (ISGT Europe), 2011 2nd IEEE PES International Conference and Exhibition on
Conference_Location :
Manchester
Print_ISBN :
978-1-4577-1422-1
Electronic_ISBN :
2165-4816
DOI :
10.1109/ISGTEurope.2011.6162814
