مشخصه ی عملیاتی تطایقی به منظور بهبود پایداری عملیاتی حفاظت دیفرانسیلی (تفاضلی) درصدی
An Adaptive Operating Characteristic to Improve the Operation Stability of Percentage Differential Protection Abstract—Based on the comprehensive analyses of the existing current differential protection criterion, a new type of adaptive restraint coefficient-based criterion is put forward in line with a variety of
An Adaptive Operating Characteristic to Improve the Operation Stability of Percentage Differential Protection
Abstract—Based on the comprehensive analyses of the existing
current differential protection criterion, a new type of adaptive
restraint coefficient-based criterion is put forward in line with a
variety of fault conditions. The restraint coefficient of this criterion
can be adaptively adjusted according to the operation and
fault conditions of the system. In this case, this criterion can guarantee
the stability of the protection during external faults. Taking
into account the increasing applications of current differential protection
in the extremely high voltage or even ultra-high voltage
transmission systems, the work performed in this paper is provided
with better performance in the case of external faults and
various high-resistance internal faults than the existing criterion.
Hence, it is promising to apply the current differential protection
for 750-kV and above transmission lines. Using Electromagnetic
Transients Program software, a simulation model based on 750-kV
transmission lines in the Northwest China power grid is established
to validate the proposed scheme. All of the real data are provided
by the utility of the Northwest China power grid and China Northwest
Electric Power Design Institute. The simulation results show
that the proposed scheme has satisfactory operation performance..
مشخصه ی عملیاتی تطایقی به منظور بهبود پایداری عملیاتی حفاظت دیفرانسیلی (تفاضلی) درصدی
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