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A new fault location method based on zero sequence admittance measurement is presented in order to solve the fault location problem of single phase-to-earth fault in non-solidly earthed distribution network. The zero sequence admittance is calculated using measured zero sequence current and zero sequence voltage at sectionalized switch. The fault direction is determined by master station according...
An improved differential equation method for earth fault location in non-effectively earthed system is proposed. Karrenbauer transformation is used to construct the compound mode network of single phase earth fault. Based on the mode network, the fault equation including mode voltage, mode current, line parameters and earthed resistance is derived .The fault distance can be gotten by solving the equation...
Power system real-time digital simulation system, which is widely used in China, plays an important role in stability analysis, security assessment, relay protection equipments test, etc. With electronic transformers, D/A conversion and power amplification are no longer needed, output data by simulation software can be directly sampled. The schematic diagram of the new digital simulation system with...
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