OPGW on Overhead Transmission Lines Operation Mode Research

The induction and the electrostatic coupling result hundreds volts of lengthwise induction potential and electrostatic induction voltage through ground wires in normal ground wire operation mode for high voltage transmission lines, which leads to circulating currents and considerable energy loss between optical fiber composite overhead ground wire(OPGW) and ground. This paper makes some simulation researches on energy-saving ground wire operation mode as possible solutions of loop currents in OPGW. This paper takes typical 500kV transmission line project as an example, the electromagnetic transient simulation software EMTP is used. Different ground wire operation modes are simulated by the software EMTP. The ground wire energy loss is analyzed and compared. Finally, the design scheme of new energy-saving ground wire operation mode is studied and recommended.