低频减载是一种防止电力系统出现频率崩溃的安全控制措施。低频减载装置是实现这一措施的自动装置。它由频率测量和减载两个环节组成。
一种方法是低频减载(under frequency load shedding，UFLS)，另一种方法是调 速控制 [2] 。这 2 种方式相互配合成为频率保护的主 要方法。
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低频减载方案 under-frequency load shedding scheme
The dispersion of dynamic frequency in complicated system is one of reasons which lead the unsatisfactory performance of under frequency load shedding device.
而复杂系统动态频率的时空分散性正是导致低频减载装置动作不令人满意的原因之一。
参考来源 - 现代电力系统中影响动态频率特性的因素分析·2,447,543篇论文数据，部分数据来源于NoteExpress
本文通过对某钢铁企业南变电力系统的稳定性分析，给出了低频减载和区域安全稳定控制两种方案。
Through analysis of the stability of NanBian power supply system in a steel enterprise, under-frequency load-shedding plans and regional security and stability control plans are adopted in this paper.
介绍一种自适应型低频减载装置的方案，它依据频率和频率的变化率，动态的确定减负荷装置的动作情况。
This paper presents an adaptive scheme that USES both frequency and rate-of-change of frequency measurements to dynamically set ULFS relays if more than one generation outage is experienced.
该策略在负荷频率调节效应检测的基础上辨识出负荷的频率刚性大小，并基于此实现低频减载的策略优化。
Based on the frequency regulation effects, the strategy identifies the frequency rigidity of loads and optimizes the UFLA strategy.
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