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| Multi-frequency band oscillation source location based on STFT andtwo-stage deep transfer learning |
| DOI：10.19783/j.cnki.pspc.240251 |
| Key Words:multi-frequency band oscillation short-time Fourier transform (STFT) feature image deep transfer learning oscillation source location |
| Author Name | Affiliation | | YU Ming1 | 1. School of Electrical and Electronic Engineering, Huazhong University of Science and Technology,
Wuhan 430074, China
2. State Grid Hubei Electric Power Research Institute, Wuhan 430077, China
3. State Grid Hubei Electric Power Co., Ltd., Wuhan 430077, China | | YAO Wei1 | 1. School of Electrical and Electronic Engineering, Huazhong University of Science and Technology,
Wuhan 430074, China
2. State Grid Hubei Electric Power Research Institute, Wuhan 430077, China
3. State Grid Hubei Electric Power Co., Ltd., Wuhan 430077, China | | ZHAO Yifan1 | 1. School of Electrical and Electronic Engineering, Huazhong University of Science and Technology,
Wuhan 430074, China
2. State Grid Hubei Electric Power Research Institute, Wuhan 430077, China
3. State Grid Hubei Electric Power Co., Ltd., Wuhan 430077, China | | SHI Zhongtuo1 | 1. School of Electrical and Electronic Engineering, Huazhong University of Science and Technology,
Wuhan 430074, China
2. State Grid Hubei Electric Power Research Institute, Wuhan 430077, China
3. State Grid Hubei Electric Power Co., Ltd., Wuhan 430077, China | | LIU Haiguang2 | 1. School of Electrical and Electronic Engineering, Huazhong University of Science and Technology,
Wuhan 430074, China
2. State Grid Hubei Electric Power Research Institute, Wuhan 430077, China
3. State Grid Hubei Electric Power Co., Ltd., Wuhan 430077, China | | CHEN Rusi2 | 1. School of Electrical and Electronic Engineering, Huazhong University of Science and Technology,
Wuhan 430074, China
2. State Grid Hubei Electric Power Research Institute, Wuhan 430077, China
3. State Grid Hubei Electric Power Co., Ltd., Wuhan 430077, China | | LI Dahu3 | 1. School of Electrical and Electronic Engineering, Huazhong University of Science and Technology,
Wuhan 430074, China
2. State Grid Hubei Electric Power Research Institute, Wuhan 430077, China
3. State Grid Hubei Electric Power Co., Ltd., Wuhan 430077, China | | WEN Jinyu1 | 1. School of Electrical and Electronic Engineering, Huazhong University of Science and Technology,
Wuhan 430074, China
2. State Grid Hubei Electric Power Research Institute, Wuhan 430077, China
3. State Grid Hubei Electric Power Co., Ltd., Wuhan 430077, China |
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| Abstract:With the large-scale integration of new energy, represented by wind and solar power, into the system and the use of new governors of high-power turbine units, the oscillations in the new power system have expanded from the traditional low frequency oscillation to multi-frequency band oscillation. Accurately locating the oscillation source is a key means to suppress the expansion of adverse effects. Thus a novel location method based on short-time Fourier transform (STFT) and two-stage deep transfer learning is proposed. In this method, the active power measurement signals of all generators are converted into time-frequency representation matrices by STFT processing, and the matrices are transformed into feature images by linear mapping, so that the location problem is transformed into an image classification problem. The feature images are then fed into a ResNet50-based two-stage classifier. The first stage is used to determine the type of oscillation, while the second stage is used to locate the source. Transfer learning integrated with image knowledge learning is adopted to further improve the training efficiency and localization accuracy. Simulation results for the New England system with wind power and the Hubei power grid show that, compared to the support vector machine, decision tree and single-step transfer learning method, the proposed method has higher accuracy and robustness in the presence of noise. |
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