Buried cables and coaxial with frequency-dependent parameters such as multi-conductor transmission line transient electromagnetic process FDTD calculation method

Get transfer impedance and transfer admittance amplitude-frequency characteristics, and the phase-frequency characteristics can be obtained, and the test system is relatively simple; applies not only to single-core shielded cable can also be used for multi-core shielded cable transfer impedance and transfer admittance measurement . With other methods of  electric meter  results were compared with measurements to verify the correctness of this measurement method. Proposed for research overhead lines, underground cables and coaxial cables with frequency-dependent  air circuit breaker  as multi-conductor transmission line transient electromagnetic process FDTD calculation. The main research results to establish a substation switching transients field time-domain simulation model, based on the spark  Voltage stabilizer , the isolation arc discharge channel switching operation, time-varying resistance and inductance formulas. A typical substation switching transients by fitting the measured field data obtained arc discharge channel switching time-varying resistance range. Based on this model to study the impact of switching transients field intensity and rise time of a variety of parameters for EHV and UHV substation switching transients field study provides a theoretical basis.