Ultra-fast current differential protection with high-sensitivity for HVDC transmission lines
نویسندگان
چکیده
Abstract Protection of transmission lines is the most important defense against faults in multi-terminal HVDC system. Up until now, no single protection can balance operation speed and sensitivity needed for all fault types. To solve this problem, a novel current differential line proposed paper. The intrinsic properties are analyzed first. Then, essence ideal revealed fundamental relations between models performance degradation existing protections discussed. Based on analysis, scheme, including detection faulty pole selection, developed, Bergeron model used to describe electrical wave propagation process along line, resulting only simple computations each calculation cycle. Finally, simulation Wudongde ± 800 kV project China established PSCAD/EMTDC verification. By discussing diversified transient processes, results prove that regardless type, distance transition impedance, respond correctly. Main contribution paper reducing time from hundreds milliseconds several milliseconds.
منابع مشابه
Pole-to-Ground Fault Analysis and Fast Protection Scheme for HVDC Based on Overhead Transmission Lines
Flexible direct current (DC) transmission network technology is an effective method for large capacity clean energy access to power grids, but the DC short-circuit fault detection for it is a difficult problem. In this paper, the pole-to-ground fault transient characteristics in a multi-terminal DC power grid, based on overhead transmission lines and DC circuit breakers, are analyzed firstly. T...
متن کاملTransmission Lines Protection Based on the Current Eigenvalues Differential Concept
This work presents a new approach for a current differential protection of the transmission lines. The proposed approach is based on the Clarke-Concordia transformation and principal component analysis. First the acquired current signals are transformed into “αβo” components by applying the ClarkeConcordia transformation. This allows obtaining typical patterns. To identify these patterns a prin...
متن کاملResearch of Bipolar HVDC Transmission Lines based on Traveling Wave Differential Protection
The principle of the traveling wave based differential protection for bipolar HVDC transmission lines is proposed in the paper. Unlike the traditional current differential protection, the quantity of current is replaced by the quantity of the traveling wave for comparison. The traveling wave at the remote end is transferred to the local end for comparison to the local traveling wave. For the bi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: International Journal of Electrical Power & Energy Systems
سال: 2021
ISSN: ['1879-3517', '0142-0615']
DOI: https://doi.org/10.1016/j.ijepes.2020.106580