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首页> 外文期刊>IEEE Transactions on Power Systems >Cross-Gramian Model Reduction Approach for Tuning Power System Stabilizers in Large Power Networks
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Cross-Gramian Model Reduction Approach for Tuning Power System Stabilizers in Large Power Networks

机译：大电网调谐电力系统稳定器的跨克克克百万模型减少方法

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摘要

Poorly damped inter-area modes of oscillations represent a major concern to power system operation since they detain the power transfer capability of transmission networks. This situation becomes more stringent as the tie-lines are heavily stressed and/or large amounts of renewable energy resources are installed. To overcome this issue, a detailed mathematical model is proposed in this paper to reduce the linearized model of a large power system using the cross-Gramian technique. The presented approach divides the system into a study area which contains one generation unit with installed power system stabilizer (PSS) and an external one which comprises the rest of generation units in the system. Model order reduction is only applied to the external area with the objective of maintaining the characteristics of the original model. Meanwhile, the dynamics of the study area are preserved to provide the required damping through the designed PSS. In addition, an online tuning methodology is also presented to provide robust damping performance in response to changes in the system operating conditions. The deployed cross-Gramian model order reduction alleviates the computational burden and time associated with the online PSS tuning when original power system models are used. The effectiveness of the proposed approach is tested using the New-England 39-bus system in addition to another practical system which resembles the Northern Regional Power Grid India test system.
机译：由于它们介断传输网络的功率传输能力，因此阻尼的间区域振荡模式代表了电力系统操作的主要关注点。随着系列压力强调和/或大量可再生能源资源，这种情况变得更加严格。为了克服这个问题，在本文中提出了一种详细的数学模型，以减少使用跨克革命技术的大型电力系统的线性化模型。所提出的方法将系统划分为一个研究区域，该研究区域包含一个具有安装电力系统稳定器（PSS）的一代单元和外部，其包括系统中的其余生成单元。模型顺序仅应用于外部区域，目的是保持原始模型的特性。同时，保留了研究区域的动态以提供所需的PSS所需的阻尼。此外，还提出了在线调谐方法，以响应于系统操作条件的变化提供鲁棒阻尼性能。部署的跨克拉姆模型顺序减少减轻了在使用原始电力系统模型时与在线PSS调整相关的计算负担和时间。除了另一种实用的系统之外，还使用新英格兰39总线系统测试了所提出的方法的有效性，这是类似于北部区域电网印度的测试系统。

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