On the Simultaneous Estimation of Dynamic and Algebraic States in Power Networks via State Observer
On the Simultaneous Estimation of Dynamic and Algebraic States in Power Networks via State Observer
复制标题
基于状态观测器的电力网络动态和代数状态同时估计
DOI：
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
Junbo Zhao
中科院分区：
文献类型：
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作者：
Sebastian A. Nugroho;A. Taha;Nikolaos Gatsis;Junbo Zhao
研究了输电网络中动态状态和代数状态的估计问题。具体来说，我们利用电网的线性化微分代数方程(DAE) -也称为描述系统模型-包括发电机的动力学，定子的代数约束，发电机的复杂功率和网络的复杂功率平衡方程。然后将DAE与基于相量测量单元的测量模型（假设测量母线电压和线路电流）结合在一起，产生半显式线性DAE，利用该模型设计线性DAE观测器来估计电网的动态和代数状态。利用ieee9总线传输系统进行了数值仿真，分析了该观测器在高斯和非高斯噪声下估计发电机内部状态和未测母线电压的性能。
This paper considers the problem of estimating the dynamic and algebraic states in transmission power networks. Specifically, we leverage a linearized, differential-algebraic equation (DAE) of power networks—also called descriptor system models—consisting generator’s dynamics, stator’s algebraic constraints, generator’s complex power, and the network’s complex power balance equations. The DAE is then combined together with a phasor measurement unit-based measurement model, which assumes that bus voltages and line currents are measured, to produce a semi-explicit linear DAE which is exploited to design a linear DAE observer to estimate the dynamic and algebraic states of power networks. Numerical simulations are performed using the IEEE 9-bus transmission system to analyze the performance of the proposed observer in estimating generators’ internal states and unmeasured bus voltages subject to both Gaussian and non-Gaussian noise.