The invention provides a united long-range
transmission system for
liquefied natural gas and high-temperature superconducting
electric energy, comprising an LNG (
liquefied natural gas) delivery pump, wherein the LNG delivery pump is connected with an LNG input
pipe, output of the LNG delivery pump is divided into two parts, one part is connected with a first superconducting cable terminal by a pipeline, the other part is communicated with an outer
pipe of an LNG delivery
pipe by the pipeline, an LNG outlet of the first superconducting cable terminal is communicated with an inner pipe of the LNG delivery pipe,
alternating current is converted by an AC / DC (
alternating current /
direct current) convertor
station and then the converted current is connected with the first superconducting cable terminal, the first superconducting cable terminal is connected with a high-temperature superconducting cable of the LNG delivery pipe, the high-temperature superconducting cable is connected with a second superconducting cable terminal, the inner pipe of the LNG delivery pipe is connected with the second superconducting cable terminal, the second superconducting cable terminal is communicated with the outer pipe of the LNG delivery pipe and is communicated with the an LNG output pipe, and the second superconducting cable terminal is connected with a DC output line. According to the
system, the
liquefied natural gas and the
electric energy can be transported jointly, the
gas transmission capacity can be improved, and the transmission losses can be reduced, so that the
system is high in economic benefit and social benefit.