利用低频AC技术实现长距离输电线路的地下接地
Enabling Undergrounding of Long-Distance Transmission Lines with Low Frequency AC Technology
摘要：
随着严重自然灾害的日益普遍和电力线路引发的野火，许多电力系统规划者正在考虑将架空线路转换为地下电缆，以减轻与这些事件相关的风险。由于电缆的电容和损耗，具有大比例地下电缆的系统可能会带来挑战，这些因素可能会限制关键区域的硬化潜力。低频交流（LFAC）传输解决了这些问题，因为降低频率会降低电容和损耗的影响。本文提出了一种易于处理的地下电缆频率相关模型，并将其纳入开源最优潮流工具VariableFrequencyOPF. jl。该模型和实施是用来证明LFAC的好处，在一个案例研究涉及两个多终端电缆升级LFAC，包括与高压直流输电的比较。结果表明LFAC系统的价值，为潮流控制和减少损失。
英文摘要：
With increasing prevalence of severe natural hazards and the ignition of wildfires by power lines, many power system planners are considering converting overhead lines to underground cables to mitigate risks related to these events. Systems with a large proportion of underground cables can bring challenges due to the capacitance and losses of the cables, factors which may limit the potential for hardening in critical areas. Low frequency AC (LFAC) transmission solves these problems, as lowering the frequency decreases both the effects of capacitance and the losses. This paper presents a tractable frequency-dependent model for underground cables and incorporates it into the open source optimal power flow tool VariableFrequencyOPF.jl. The model and implementation are used to demonstrate the benefits of LFAC in a case study involving two multi-terminal cable upgrades with LFAC, including a comparison with HVDC. The results demonstrate the value of LFAC systems for both power flow control and reduction of losses.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
