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Toward PMU-based robust automatic voltage control (AVC) and automatic flow control (AFC)

机译:迈向基于PMU的强大的自动电压控制(AVC)和自动流量控制(AFC)

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This paper is motivated by the need to automate adjustments of deviations in key output variables from their scheduled values. In particular, it is important to maintain load voltages within their pre-specified limits in response to many disturbances, for example load power factor deviations. Similarly, it is important to regulate real power line flows to within their pre-specified limits as disturbances around scheduled real power generation dispatch take place. Such automation is a feasible goal since the PMUs could provide accurate and fast sensing of key output variables of interest. Given the number of PMUs, the selection of best locations of PMUs and the control design based on these measurements becomes an engineering design problem. In this paper we provide a problem formulation for a robust Automated Voltage Control (AVC) and Automated Flow Control (AFC) design based on selecting the best locations for placing the PMUs. The AVC and AFC designs are illustrated using a small 5-bus example first. This is followed by illustrating potential performance of such design on an equivalent NPCC 36-bus system. The results indicate that the (N−1) reliability criteria can be met by combining the economic dispatch for scheduling resources given demand forecast, and by relying on an automated feedback to ensure that voltage and line flow deviations remain within the pre-specified limits in between scheduling intervals. This is done without having to know the exact location and magnitude of disturbances.
机译:本文的动机是需要自动调整关键输出变量与计划值之间的偏差。尤其重要的是,响应于许多干扰(例如负载功率因数偏差),将负载电压保持在其预定极限内。同样,重要的是要在计划的有功功率调度周围发生干扰时,将有功功率流控制在预定的范围内。这样的自动化是一个可行的目标,因为PMU可以提供对关键输出变量的准确而快速的检测。给定PMU的数量,选择PMU的最佳位置以及基于这些测量的控制设计成为工程设计问题。在本文中,我们基于选择放置PMU的最佳位置,为稳健的自动电压控制(AVC)和自动流量控制(AFC)设计提供了一个问题公式。首先以5总线小型示例说明AVC和AFC设计。接下来,说明了这种设计在等效NPCC 36总线系统上的潜在性能。结果表明(N-1)可靠性标准可以通过组合经济调度以在给定需求预测的情况下调度资源来满足,并且依靠自动反馈来确保电压和线路流量偏差保持在预先指定的限制内安排时间间隔之间。无需知道干扰的确切位置和大小即可完成此操作。

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