In this paper, an application of fault current limiter-thyristor controller series reactor （FCL-TCSR） in the distribution network is presented in order to minimize the peak value of current during the fault conditio...In this paper, an application of fault current limiter-thyristor controller series reactor （FCL-TCSR） in the distribution network is presented in order to minimize the peak value of current during the fault condition. This application considers a single fault current limiting action but can also be applied for a three phase system. The maximum contribution of FCL-TCSR quickly clears the abnormal current in the power distribution system when a fault condition occurs. Using a mathematical model of FCL-TCSR, the impact of series impedance used to adjust the amplitude of the fault current action is demonstrated. The performance of the load with the impedance and load in series is also analyzed.展开更多
Fault behaviors of inverter-interfaced renewable energy generators(IIREGs)are quite diverse from those of synchronous generators(SGs).They show the variable system impedance,the limited current and low inertia,so the ...Fault behaviors of inverter-interfaced renewable energy generators(IIREGs)are quite diverse from those of synchronous generators(SGs).They show the variable system impedance,the limited current and low inertia,so the proportional brake differential protection installed on the transmission line has a high risk of failure for phase-phase failures.To cope with this adaptive problem,a new pilot protection is proposed considering the huge differences in both current amplitudes.Also,an improved criterion is presented for a scenario with a teed line.The existing protection principles focus excessively on the fault current characteristics of IIREGs,so they cannot operate correctly once IIREGs do not output their fault current.This happens when IIREGs produce no power or the circuit breakers exactly reclose on permanent failures.However,the proposed method has good performance for the above cases.The proposed method only requires current amplitude information,and in this case the strict synchronizing measurement is not necessary.Case studies are performed under different fault conditions,and they confirm the proposed method has good performance under different fault conditions.Furthermore,it is also verified using field-testing data.展开更多
文摘In this paper, an application of fault current limiter-thyristor controller series reactor （FCL-TCSR） in the distribution network is presented in order to minimize the peak value of current during the fault condition. This application considers a single fault current limiting action but can also be applied for a three phase system. The maximum contribution of FCL-TCSR quickly clears the abnormal current in the power distribution system when a fault condition occurs. Using a mathematical model of FCL-TCSR, the impact of series impedance used to adjust the amplitude of the fault current action is demonstrated. The performance of the load with the impedance and load in series is also analyzed.
基金supported by the National Key Research and Development Program of China under Grant No.2018YFB0904104Science and Technology Project of SGCC(SGHB0000KXJS1800685).
文摘Fault behaviors of inverter-interfaced renewable energy generators(IIREGs)are quite diverse from those of synchronous generators(SGs).They show the variable system impedance,the limited current and low inertia,so the proportional brake differential protection installed on the transmission line has a high risk of failure for phase-phase failures.To cope with this adaptive problem,a new pilot protection is proposed considering the huge differences in both current amplitudes.Also,an improved criterion is presented for a scenario with a teed line.The existing protection principles focus excessively on the fault current characteristics of IIREGs,so they cannot operate correctly once IIREGs do not output their fault current.This happens when IIREGs produce no power or the circuit breakers exactly reclose on permanent failures.However,the proposed method has good performance for the above cases.The proposed method only requires current amplitude information,and in this case the strict synchronizing measurement is not necessary.Case studies are performed under different fault conditions,and they confirm the proposed method has good performance under different fault conditions.Furthermore,it is also verified using field-testing data.
