Application of df/dt in power system protection and its implementation in microcontroller based intelligent load shedding relay
Application of df/dt in power system protection and its implementation in microcontroller based intelligent load shedding relay
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df/dt在电力系统保护中的应用及其在单片机智能减载继电器中的实现
DOI：
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
Y. Moon
中科院分区：
文献类型：
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作者：
L. Shih;W. Lee;J. Gu;Y. Moon
针对低频运行的电力系统，提出了几种考虑df/dt影响的实用智能整定方案，并进行了仿真。讨论了DF/DT继电保护整定的注意事项。这些智能设置方案在低频条件下取得了积极的改善。作为这些新的智能控制方案的扩展，介绍了一种基于微控制器的智能低频/过频继电器。该微控制器硬件先进，软件智能化，具有灵活性高、成本低、通信能力强等优点。
Several practical intelligent setting schemes that consider the effect of df/dt are suggested and simulated for a power system operating in an underfrequency situation. Considerations for df/dt relay setting are discussed. These intelligent setting schemes have made a positive improvement in the underfrequency condition. As an extension of these new intelligent control schemes, a microcontroller based intelligent under/over frequency relay is introduced. With its advanced hardware and intelligent software, this microcontroller has the advantages of high flexibility, less cost, and high communication ability.<<ETX>>