Journal of Shanghai Jiao Tong University

Journal of Shanghai Jiaotong University >

2024 , Vol. 58 >Issue 10: 1500 - 1512

DOI: https://doi.org/10.16183/j.cnki.jsjtu.2023.071

Original article

A Prediction Method of New Power System Frequency Characteristics Based on Convolutional Neural Network

  • LU Wen’an ,
  • ZHU Qingxiao ,
  • LI Zhaowei ,
  • LIU Hui ,
  • YU Yiping
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  • 1. College of Energy and Electrical Engineering, Hohai University, Nanjing 211100, China
    2. NARI Group Corporation/State Grid Electric Power Research Institute, Nanjing 211106, China
    3. State Grid Anhui Electric Power Co., Ltd., Hefei 230022, China

Received date: 2023-03-03

  Revised date: 2023-05-08

  Accepted date: 2023-05-26

  Online published: 2023-07-06

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Abstract

In order to solve the problems existing in the traditional frequency analysis method for the frequency analysis of grids with a high proportion of new energy, such as the large amount of calculation, the difficulty of modeling, and the prominent contradiction between the calculation speed and the calculation accuracy, this paper proposes a new frequency characteristic prediction method for the new power system based on convolutional neural network (CNN). First, the main frequency indexes of the power system with a high proportion of new energy under power disturbances are predicted using one-dimensional CNN, including the initial frequency change rate, frequency extremum, and frequency steady-state value. The prediction accuracy is improved by setting reasonable input characteristics and optimizing the parameters of the neural network. Then, the impact of disturbance location and disturbance type is further considered, and the power system characteristic data set containing disturbance information is established by the method of data dimensionality reduction. The input characteristics are constructed by using the principle of three primary channels for reference, and the extended two-dimensional CNN is used to predict the frequency security index, which improves the adaptability of CNN in the frequency analysis of grids with a high proportion of new energy. Finally, the method is verified by an example in the improved BPA 10-machine 39-node model, and the results are compared with the prediction results of the recurrent neural network, which proves that the proposed method has a high accuracy and adaptability.

Key words： new power system; convolutional neural network (CNN); frequency safety index; disturbance information; frequency characteristic prediction

Cite this article

LU Wen’an , ZHU Qingxiao , LI Zhaowei , LIU Hui , YU Yiping . A Prediction Method of New Power System Frequency Characteristics Based on Convolutional Neural Network[J]. Journal of Shanghai Jiaotong University, 2024 , 58(10) : 1500 -1512 . DOI: 10.16183/j.cnki.jsjtu.2023.071

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