几种特殊输电方式的分析比较和展望

Comparison and prospect of several special technologies of power transmission

除交流输电和传统高压直流输电(HVDC)以外,在某些特定情况下需要采用特殊的输电方式,主要包括轻型HVDC(HVDC Light)、分频输电(FFTS)、多相输电(MPTS)、微波输电、激光输电等。为充分发挥上述各种输电方式的独特优势,综合分析比较了它们的原理、特点、优势、难点及当前研究发展情况,指出各自的适用领域,展望它们的发展前景。其中,FFTS和MPTS从属于交流输电方式,主要应用于长距离大容量输电,轻型HVDC、微波输电和激光输电从属于直流输电方式,主要应用于特殊场合输电,而轻型HVDC已有较成熟的工业应用线路,且其交直流转换技术的发展可作为MTE和激光输电的技术基础,因此轻型HVDC的研究和发展具有重要的意义。

Expect for high voltage AC transmission and conventional HVDC, several special transmission technologies, namely, HVDC light, fractional frequency transmission system (FFTS), multi-phase transmission system (MPTS), microwave power transmission (MWPT) and laser power transmission (LPT),must be adopted in some certain conditions. The paper presents a comprehensive comparison of them, in terms of principles, characteristics, advantages, bottlenecks and status quo as well. The paper also indicates their prospects. Among these technologies, FFTS and MPTS belong to the AC transmission technologies suitable for the cases of long distance and large capacity, while HVDC light, MWPT and LPT belong to the DC transmission technologies for the cases to meet some special requirements. HVDC light,as the technological bases of MWPT and LPT,has heen put into commercial operation and is more likely to have a promising future.