Fault management study in smart grid systems (SGSs) is important to ensure the stability of the system. Also, it is important to know the major types of power failures for the effective operation of the SGS. This pape...Fault management study in smart grid systems (SGSs) is important to ensure the stability of the system. Also, it is important to know the major types of power failures for the effective operation of the SGS. This paper reviews diverse types of faults that might appear in the SGS and gives a survey about the impact of renewable energy resources (RERs) on the behavior of the system. Moreover, this paper offers different fault detection and localization techniques that can be used for SGSs. Furthermore, a potential fault management case study is proposed in this paper. The SGS model in this paper is investigated using both of the Matlab/Simulink and the Real Time Digital Simulation (RTDS) to compute the fault management study. Simulation results show the fast response to a power failure in the system which improves the stability of the SGS.展开更多
Porcelain insulators have a long history and wide application range in power systems,but just like any other insulator,they can fail.A number of pole fires occurred on lines utilising porcelain suspension insulators.I...Porcelain insulators have a long history and wide application range in power systems,but just like any other insulator,they can fail.A number of pole fires occurred on lines utilising porcelain suspension insulators.In some cases,the insulators appeared to be visually intact with no external signs of degradation or abnormal stress.This prompted a comprehensive assessment to identify the mechanism that leads to the permanent loss of insulating properties while retaining external physical characteristics.A single test is not sufficient to determine the underlying cause of conduction as results may produce contradictory conclusions.Electrical tests were able to identify samples with poor dielectric strength.Nevertheless,these same samples exhibited excellent mechanical properties.Despite successfully passing numerous porosity tests,scanning electron microscopic analysis revealed porosity and multiple microscopic punctures in the porcelain dielectric.Only upon complete dissection of samples,the conduction mechanism was revealed.This article discusses the challenges associated with establishing the root failure mechanism for the investigated porcelain insulators that allows visually sound samples to lose their insulating properties without experiencing catastrophic failure.展开更多
文摘Fault management study in smart grid systems (SGSs) is important to ensure the stability of the system. Also, it is important to know the major types of power failures for the effective operation of the SGS. This paper reviews diverse types of faults that might appear in the SGS and gives a survey about the impact of renewable energy resources (RERs) on the behavior of the system. Moreover, this paper offers different fault detection and localization techniques that can be used for SGSs. Furthermore, a potential fault management case study is proposed in this paper. The SGS model in this paper is investigated using both of the Matlab/Simulink and the Real Time Digital Simulation (RTDS) to compute the fault management study. Simulation results show the fast response to a power failure in the system which improves the stability of the SGS.
文摘Porcelain insulators have a long history and wide application range in power systems,but just like any other insulator,they can fail.A number of pole fires occurred on lines utilising porcelain suspension insulators.In some cases,the insulators appeared to be visually intact with no external signs of degradation or abnormal stress.This prompted a comprehensive assessment to identify the mechanism that leads to the permanent loss of insulating properties while retaining external physical characteristics.A single test is not sufficient to determine the underlying cause of conduction as results may produce contradictory conclusions.Electrical tests were able to identify samples with poor dielectric strength.Nevertheless,these same samples exhibited excellent mechanical properties.Despite successfully passing numerous porosity tests,scanning electron microscopic analysis revealed porosity and multiple microscopic punctures in the porcelain dielectric.Only upon complete dissection of samples,the conduction mechanism was revealed.This article discusses the challenges associated with establishing the root failure mechanism for the investigated porcelain insulators that allows visually sound samples to lose their insulating properties without experiencing catastrophic failure.
