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Localization method of subsynchronous oscillation source based on high-resolution time-frequency distribution image and CNN

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Global Energy Interconnection 2024年第1期7卷 1-13页

作者： Hui Liu yundan Cheng Yanhui Xu Guanqun Sun Rusi Chen xiaodong yu Institute of Electric Power Systems School of Electrical and Electronic EngineeringNorth China Electric Power UniversityBeijing 102206P.R.China Electric Power Research Institute of State Grid Hubei Electric Power Co. Ltd.Wuhan 430077P.R.China Central China Branch of State Grid Corporation of China Wuhan 430077P.R.China

The penetration of new energy sources such as wind power is increasing,which consequently increases the occurrence rate of subsynchronous oscillation ***,existing subsynchronous oscillation source-identification methods primarily analyze fixed-mode oscillations and rarely consider time-varying features,such as frequency drift,caused by the random volatility of wind farms when oscillations *** paper proposes a subsynchronous oscillation sourcelocalization method that involves an enhanced short-time Fourier transform and a convolutional neural network(CNN).First,an enhanced STFT is performed to secure high-resolution time-frequency distribution(TFD)images from the measured data of the generation unit ***,these TFD images are amalgamated to form a subsynchronous oscillation feature map that serves as input to the CNN to train the localization ***,the trained CNN model realizes the online localization of subsynchronous oscillation *** effectiveness and accuracy of the proposed method are validated via multimachine system models simulating forced and natural oscillation events using the Power Systems Computer Aided Design *** results show that the proposed method can localize subsynchronous oscillation sources online while considering unpredictable fluctuations in wind farms,thus providing a foundation for oscillation suppression in practical engineering scenarios.

关键词： Subsynchronous oscillation source localization Synchronous squeezing transform Enhanced short-time Fourier transform Convolutional neural networks

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Breaking Barriers

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China Weekly 2024年第6期 22-31页

作者： yu xiaodong 不详

China and France are enhancing bilateral ties on a landmark diplomatic anniversary,with Paris calling for greater strategic autonomy in *** Chinese President Xi Jinping arrived in Paris on a State visit to France on May 5,he was received with a red carpet and a guard of *** next day,French President Emmanuel Macron held a grand welcome ceremony for Xi and his wife,Peng Liyuan.

关键词： strategic Paris honor

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Back on Track?

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China Weekly 2024年第5期 14-16页

作者： yu xiaodong 不详

China and Australia seek to stabilize bilateral relations amid growing skepticism over Canberra's dependence on Washington for its foreign and defense policies.

关键词： Track Australia bilateral

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SCO Summit:Rise of the Global South?

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China Weekly 2024年第8期 14-16页

作者： yu xiaodong 不详

The ScO summit has increasing appeal to regional leaders and those of the Global South,as the group expands its remit to tackle issues of sustainability and infrastructure。Leaders from China,Russia,countries in Central Asia,and the Global South gathered in Astana,Kazakhstan on July 3 and 4 for the 24th Meeting of the Council of Heads of State of the Shanghai Cooperation Organization.

关键词： Global gathered Russia

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Breakthrough for Palestine Reconciliation

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China Weekly 2024年第9期 18-21页

作者： yu xiaodong 不详

The China-brokered reconciliation deal marks a rare breakthrough in establishing a united front among Palestinian factions though prospects for the two state solution to the Israel-Palestine conflict remain distant From July 21 to 23,senior representatives of 14 Palestinian factions,including Fatah and Hamas which govern the West Bank and the Gaza Strip respectively.

关键词： Israel breakthrough establishing

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A New Growth Paradigm

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China Weekly 2024年第4期 18-21页

作者： yu xiaodong 不详

China's new strategy of building up'new quality productive forces'looks to pursue new growth engines and upgrade the economy。On March 4 and 5,China kicked off its annual meetings of the National People's Congress(NPC),the legislature,and the National People's Political Consultative Conference(NPPCC),the country's top political advisory body,in *** colloquially as the two sessions,the meetings are one of the most important events on China's political agenda.

关键词： political forces productive

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End of An Em

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China Weekly 2024年第1期 32-34页

作者： yu xiaodong 不详

Chinese officials and scholars bid farewell to Henry Kissinger and the bygone era of stable relations between China and the US that the famous strategist helped to build and sustain.

关键词： officials of stable

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Shanri-La Dialogue On Course for Collision?

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China Weekly 2024年第7期 18-19页

作者： yu xiaodong 不详

In keynote speech delivered on June 2 at the 21st Shangri-La Dialogue in Singapore,China's Defense Minister Admiral Dong Jun accused the US of flaring up tensions in Asia-whether in the Taiwan Strait or the South Chin... 详细信息

关键词： Sea. Taiwan Strait

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Lose-Lose or Win-Win?

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China Weekly 2024年第4期 14-17页

作者： yu xiaodong 不详

China seeks to stabilize relations with European countries amid rising anxiety in the EU over‘lose-lose’prospects as geopolitical competition leads to political fragmentation and economic uncertainties。

关键词： fragmentation political Lose

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China-Asia Pacific Ties:‘All-Dimensional’Diplomacy

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China Weekly 2024年第8期 17-19页

作者： Zheng Liying yu xiaodong 不详

Chinese Premier Li Qiang's visit to Australia,New Zealand and Malaysia further consolidated ties between China and other major Pacific *** June 20,Chinese Premier Li Qiang wrapped up a visit to three countries,includi... 详细信息

关键词： Zealand Qiang visit

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