Deterministic Dynamic State Estimation-Based Optimal LFC for Interconnected Power Systems Using Unknown Input Observer
Deterministic Dynamic State Estimation-Based Optimal LFC for Interconnected Power Systems Using Unknown Input Observer
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DOI：
10.1109/tsg.2019.2940199
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发表时间：
2020-03
影响因子：
9.6
通讯作者：
Hassan Haes Alhelou;M. E. Hamedani Golshan;N. Hatziargyriou
中科院分区：
文献类型：
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作者：
Hassan Haes Alhelou;M. E. Hamedani Golshan;N. Hatziargyriou
本文提出了一种新的，完全分散的负荷频率控制（LFC）方法的基础上动态状态估计（DSE）。所提出的方法采用一个未知的输入观测器（UIO）的每个电力系统区域跟踪动态状态在真实的时间操作。为了实现完全分散的控制方法，需求波动和联络线功率偏差被建模为未知输入到每个区域的UIO。然后采用基于观测状态的最优状态反馈控制方法分别对各个区域进行控制。该方法降低了观测器设计的复杂性，实现了完全分散控制，提高了控制器的鲁棒性，使得估计过程高效、准确、易于实现。所提出的方法的适用性示出了通过各种传输链路互连的四个领域的代表性模型。仿真结果表明，所设计的观测器的效率和准确性，并验证了所提出的控制方法相比，替代方法的优越性和鲁棒性。
This paper proposes a novel, fully decentralized load frequency control (LFC) approach based on dynamic state estimation (DSE). The proposed approach employs an unknown input observer (UIO) for each power system area for tracking the dynamic states in real time operation. In order to achieve the fully decentralized control approach, the demand fluctuation and tie-line power deviations are modeled as unknown inputs to the UIO of each area. An optimal state feedback control method based on the observed states is used next to control each area separately. This approach reduces the complexity of the designed observer, achieves fully decentralized control, improves the robustness of the controllers, and makes the estimation process highly efficient, accurate, and easy to implement. The applicability of the proposed method is shown on a representative model of four areas interconnected via various transmission links. Simulation results demonstrate the efficiency and accuracy of the designed observer and verify the superiority and robustness of the proposed control approach compared to alternative approaches.