Calculation of the Potential of Multiple Floating Conductors in a Bipolar DC Ion Flow Field

This paper presents a calculation method for the potential of multiple floating conductors in the ion flow field of bipolar DC transmission lines. By changing the potential of the floating conductor, the corresponding Surface charge density of the conductor can be obtained. When the square sum of the surface charge density of the conductor reaches the minimum, it can indicate that the steady state is reached. A simulation model was built in Comsol to verify the correctness of the calculation method; The actual calculation of the induced voltage on the “one circuit shutdown, one circuit operation” shutdown line of a double circuit 500 kV DC transmission line on the same tower provides support for the selection of electrical devices on the shutdown line.