UHV Power Frequency Electromagnetic Induction

Due to the high operating voltage and large working current, the 1000 kV UHVAC transmission line often generates the relatively serious electromagnetic induction problem to the adjacent AC and DC transmission lines. This chapter first calculates the induced voltage and current in the out-of-operation circuit of the 1000 kV double-circuit line on the same tower under the condition that one circuit is in operation and the other is out of operation for maintenance, then analyzes the influences of the different grounding methods for the overhead insulated ground wire and optical fiber composite overhead ground wire (OPGW) adopted for the 1000 kV AC transmission line on the induced voltage, induced current, and energy consumption in the ground wires, and finally discusses the power-frequency electromagnetic influences of the UHVAC transmission line on the UHVDC line erected in parallel with it.