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Auto-reclosure technique applied to transmission lines is an effective method to improve stability of power system. In this paper, a novel three-phase adaptive reclosure method by estimating shunt reactors parameter was developed to distinguish permanent fault from transient fault for transmission line with shunt reactors. The method employs the shunt reactor currents during dead time to build parameter...
In this paper, an accurate single-ended fault location algorithm using linear differential equations is introduced. Based on the R-L model of transmission lines, this algorithm is inferred from the differential equations of fault network and fault components network. The fault location linear differential equation takes the fault distance, fault resistance and source impedance (a resistance and an...
Through fault analysis of Thyristor Controlled Series Capacitors (TCSC) compensated transmission line, a novel pilot protection scheme for transmission lines with TCSC and Thyristor Controlled Reactor (TCR) is presented. It is based on integrated impedance, which is defined as the ratio between the sum of voltage phasors and the sum of current phasors at two terminals of the transmission lines. The...
A novel model parameter identification based bus-bar protection principle is proposed in this paper. An inductance model can be developed when an internal fault occurs on bus. By taking the inductance and the resistance of the model as the unknown parameters to be identified, the equivalent instantaneous impedance and the dispersion of the parameter can be calculated. Utilizing their difference, the...
Considering that the single-phase to earth fault is the main fault type on overhead transmission lines, the single-phase reclosure (SPR) scheme is applied widely to improve the stability of power system in China. Utilizing one-terminal post-fault measurements before the faulty phase is tripped and the measurements of the sound phases when the tripped faulty phase is waiting for SPR, the fault resistance...
This paper presents a method for locating faults on HVDC transmission lines using two terminal data. Different from those based on the traveling wave principle, the new fault-location algorithm can use any section of the postfault data to locate faults. The proposed method is developed based on the distributed parameter line model in which the voltage distribution over the line can be obtained from...
A novel protection technique using parameter identification is proposed. According to the electric network theory, there are fixed relationships among the stimulated signals, the network parameters and the actual responses. This means that it is possible to identify the network parameters using measurement data from stimulation and network response. Any electric component to be protected can be considered...
This paper proposed a novel time-domain fault location algorithm using one-terminal data. By using parameter identification method and distributed transmission line model, fault can be located with local voltage and current data. Since the fault distance, fault resistance and the remote terminal source parameters are considered as unknown variables, the time- domain equations of the fault-superimposed...
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