Open AccessResearch on the harmonic in new continuous cable traction power supply system and its transmission characteristic
Author(s) -
Zhang Liyan,
Liang Shiwen,
Li Xin
Publication year - 2020
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2019.1715
Subject(s) - catenary , electric power system , transmission system , harmonic , traction (geology) , electrical impedance , equivalent circuit , engineering , power transmission , electrical engineering , topology (electrical circuits) , computer science , electronic engineering , power (physics) , transmission (telecommunications) , voltage , acoustics , physics , mechanical engineering , quantum mechanics , structural engineering
This study does research on resonance and harmonic transmission problems in a new continuous cable traction power supply system (CCTPSS), CCTPSS can realise long‐distance co‐phase power supply and effectively reduce phase separation and is applicable for extended power supply in areas with the weak power grid. Firstly, the system structure is introduced, a cable traction network is divided into three kinds of subnets for its complicated topology and huge system scale. The equivalent circuit model and mathematical model of each subnet are established with distribution parameters, especially the cable capacitance effect be considered. Then, according to the two‐port network analysis theory, the system equivalent circuit is constructed by considering the electrical connection relationship, system harmonic impedance expression is calculated. Resonance influence factors and harmonic transmission mechanisms are analysed. Finally, theoretical analysis validity is verified in simulation; harmonic transmission characteristics CCTPSS including traction cable and overhead catenary, are studied. The new system shows better resonance performance compared with the existing AT traction power supply system.