Damping Control in Power Systems Under Constrained Communication Bandwidth: A Predictor Corrector Strategy
Damping Control in Power Systems Under Constrained Communication Bandwidth: A Predictor Corrector Strategy
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DOI：
10.1109/tcst.2010.2096817
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发表时间：
2012
影响因子：
4.8
通讯作者：
N. Chaudhuri;D. Chakraborty;B. Chaudhuri
中科院分区：
文献类型：
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作者：
N. Chaudhuri;D. Chakraborty;B. Chaudhuri
在电力系统中使用来自远程传感器的反馈信号阻尼机电振荡可能会受到偶尔的低带宽可用性，由于在未来越来越多地使用共享通信。本文采用预测校正（PC）策略来处理低反馈数据速率（带宽）的情况，而传统反馈（CF）会受到影响。标称系统动力学的知识用于近似（预测）的实际系统的行为时，从遥感器的数据是不可用的间隔。来自远程位置处的简化观测器的状态的最近样本用于定期重置（校正）标称动态。随着实际运行条件偏离标称动态，闭环性能恶化。尽管如此，在低带宽情况下获得了比CF更好的性能。通过仿真研究验证了整个系统闭环稳定性的分析准则。它表明，即使是合理的低数据速率的闭环稳定性通常是确保一个典型的电力系统应用程序确认这种方法的有效性。性能的恶化也被量化的名义和非名义动态之间的差异。
Damping electromechanical oscillations in power systems using feedback signals from remote sensors is likely to be affected by occasional low bandwidth availability due to increasing use of shared communication in future. In this paper, a predictor corrector (PC) strategy is applied to deal with situations of low-feedback data rate (bandwidth), where conventional feedback (CF) would suffer. Knowledge of nominal system dynamics is used to approximate (predict) the actual system behavior during intervals when data from remote sensors are not available. Recent samples of the states from a reduced observer at the remote location are used to periodically reset (correct) the nominal dynamics. The closed-loop performance deteriorates as the actual operating condition drifts away from the nominal dynamics. Nonetheless, significantly better performance compared to CF is obtained under low-bandwidth situations. The analytical criterion for closed-loop stability of the overall system is validated through a simulation study. It is demonstrated that even for reasonably low data rates the closed-loop stability is usually ensured for a typical power system application confirming the effectiveness of this approach. The deterioration in performance is also quantified in terms of the difference between the nominal and off-nominal dynamics.