In order to study the environmental impact of various electromagnetic environment parameters during theoperation of the ±500 k V double-circuit DC transmission line

the electromagnetic environment of DC transmissionlines is measured under different DC power at different erection method in the Xiluodu DC project operation phase.Analysis results show that the electromagnetic environment influence of ±500 k V Double-Circuit DC transmissionlines on the same tower charged operation on double transmission line is smaller charged operation on single trans-mission line. The measured values of total electric field

ion current density

audible noise

radio interference meetthe national standard and industry standard regulations. It also verifies that the electromagnetic environment factorcalculation in the prophase of the DC line project can effectively respond to the electromagnetic environment levelduring the operation period

and effectively avoid the disputes caused by the electromagnetic environment.