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Voluntary under-frequency load shedding at consumer-level.

机译：自愿降低用户级别的低频负载。

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摘要

Under-Frequency Load Shedding (UFLS) can increase power system reliability by preventing total system collapse during emergency operating situations when load exceeds generation. UFLS is required by The North American Electric Reliability Council (NERC) for large consumers and has been implemented by utilities across the country. When frequency drops to a certain predefined value indicating generation shortage, feeder breakers in substations are opened to shed loads in favor of maintaining a balance between loads and generation. This conventional load shedding approach has some drawbacks including disconnecting critical loads causing consumer dissatisfaction and/or disconnecting more loads than necessary that could result in system over frequency. With increasing pressure to improve system reliability through more sophisticated approaches and Supervisory Control And Data Acquisition (SCADA) equipments, electric utilities are encouraged to apply more localized frequency sensing and load shedding schemes on the distribution system. Motivated by the above fact, this research presents a study to evaluate a consumer/household level load shedding approach. Case studies are presented that show the effectiveness of the proposed consumer level UFLS when compared with the traditional substation level UFLS. Different load shedding scenarios are considered for various test power systems using the simulation package Power System Simulation for Engineers (PSS/E). It is found that the proposed customer voluntary load shedding algorithm can restore system frequency after an under-frequency problem more effectively than the traditional approach. The load shedding at consumer level is better than that at the substation level in terms of avoiding the over frequency response problem and increasing consumer satisfaction level in smart grid.
机译：低频减载（UFLS）可以通过在负载超过发电量的紧急情况下防止整个系统崩溃来提高电力系统的可靠性。 UFLS是北美电力可靠性委员会（NERC）所要求的，适用于大型消费者，并且已在全国范围内由公用事业公司实施。当频率下降到表示发电不足的某个预定值时，变电站中的馈线断路器会断开，以减轻负荷，以保持负荷与发电之间的平衡。这种传统的减载方法具有一些缺点，包括断开临界负载导致消费者不满意和/或断开更多的负载，这可能会导致系统超频。随着通过更复杂的方法以及监督控制和数据采集（SCADA）设备来提高系统可靠性的压力越来越大，鼓励电力公司在配电系统上应用更多的本地化频率感应和减载方案。基于上述事实，本研究提出了一项评估消费者/家庭水平的减载方法的研究。案例研究表明，与传统的变电站级UFLS相比，建议的用户级UFLS的有效性。使用仿真软件包“工程师动力系统仿真”（PSS / E），可以为各种测试动力系统考虑不同的减载方案。发现与传统方法相比，所提出的客户自愿减载算法可以在发生欠频问题后更有效地恢复系统频率。在避免超频响应问题和增加智能电网中的用户满意度方面，用电方的负荷削减优于变电站的负荷。

著录项

  • 作者

    Hassan, Rabab Talaat Othman Mohammed.;

  • 作者单位

    Tennessee Technological University.;

  • 授予单位 Tennessee Technological University.;
  • 学科 Alternative Energy.;Engineering Electronics and Electrical.
  • 学位 M.S.
  • 年度 2012
  • 页码 133 p.
  • 总页数 133
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地下建筑;
  • 关键词

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