A State Space Construction Method for Complex Power Systems based on the Unified-form Discrete-time Models of Multiple Types of Power Components

被引：0
|
作者：
Han Y. [1 ]
Sun H. [1 ]
Huang B. [1 ]
Mu Q. [2 ]
Qin S. [2 ]
机构：
[1] State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan
[2] China Electric Power Research Institute, Haidian District, Beijing
来源：
Sun, Haishun (haishunsun@hust.edu.cn) | 1600年 / Chinese Society for Electrical Engineering卷 / 41期
关键词：
Complex power system; Discrete-time circuit network; Discrete-time state space model; Eigenvalue analysis method; Node analysis method; Subsynchronous oscillation;
D O I：
10.13334/j.0258-8013.pcsee.201967
中图分类号：
学科分类号：
摘要：
The integration of large-scale power electronic devices may cause serious sub/super-synchronous oscillation problems. This type of oscillation belongs to the category of electrical oscillations and has the characteristics of complex oscillation mechanism and wide spreading range. Existing eigenvalue analysis methods require topological analysis of the network to select the independent state variables, and then eliminate algebraic variables to obtain the state matrix of the whole system. This process is difficult to use in the small-signal stability analysis of complex structural systems in actual research. Considering that the state space and eigenvalues of the system have a clear mapping relationship in the continuous-time and discrete-time domain, this paper proposed a discrete-time state space modelling method for the complex renewable AC/DC hybrid system. By modelling the power components as a unified discrete-time state-space model and equivalent discrete-time circuit, and forming the discrete-time circuit network according to the system topology, the node analysis method was used to quickly obtain the state matrix of the whole system. Then the eigenvalues were solved to quantify the oscillation characteristics of the system. The modelling process of this new approach was clear and easy to be realized programmatically. In addition, it also had strong adaptability to network structure changes, and thus was suitable for small signal stability analysis of large scale complex power systems. Taking the modelling and analysis of the SSO problems of a renewable AC/DC hybrid transmission system as an example, the validity of the method presented in this paper was verified. © 2021 Chin. Soc. for Elec. Eng.
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页码：6137 / 6147
页数：10
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