Improving small signal stability through operating point adjustment

IEEE PES General Meeting Pub Date : 2010-09-30 DOI:10.1109/PES.2010.5589519

Zhenyu Huang, N. Zhou, F. Tuffner, Yousu Chen, D. Trudnowski, W. Mittelstadt, J. Hauer, J. Dagle

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引用次数: 38

Abstract

ModeMeter techniques for real-time small-signal stability monitoring continue to mature, and more and more phasor measurements are available in power systems. It has come to the stage to bring modal information into real-time power system operation. This paper proposes to establish a procedure for Modal Analysis for Grid Operations (MANGO). Complementary to PSS and other traditional modulation-based control, MANGO aims to provide suggestions such as redispatching generation for operators to mitigate low-frequency oscillations. Load would normally not be reduced except as a last resort. Different from modulation-based control, the MANGO procedure proactively maintains adequate damping at all times, rather than reacting to disturbances when they occur. The effect of operating points on small-signal stability is presented in this paper. Implementation with existing operating procedures is discussed. Several approaches for modal sensitivity estimation are investigated to associate modal damping and operating parameters. The effectiveness of the MANGO procedure is confirmed through simulation studies of several test systems.

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通过工作点调整提高小信号稳定性

用于实时小信号稳定监测的ModeMeter技术不断成熟，越来越多的相量测量可用于电力系统。将模态信息引入电力系统的实时运行中，已进入了一个阶段。本文提出建立网格运行模态分析程序(MANGO)。作为PSS和其他传统基于调制的控制的补充，MANGO旨在为运营商提供诸如重新调度生成等建议，以减轻低频振荡。除非万不得已，负荷通常不会减少。与基于调制的控制不同，MANGO程序始终主动保持足够的阻尼，而不是在干扰发生时做出反应。本文讨论了工作点对小信号稳定性的影响。讨论了现有操作程序的实现。研究了几种将模态阻尼与工作参数相关联的模态灵敏度估计方法。通过对多个测试系统的仿真研究，验证了MANGO程序的有效性。

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