Transactions of China Electrotechnical Society  2017, Vol. 32 Issue (14): 184-193    DOI: 10.19595/j.cnki.1000-6753.tces.161445
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A Graphical Modeling Method Applied for Multi-Sources System Subsynchronous Oscillation Analysis
Zhao Shuqiang, Li Ren, Gao Benfeng, Yao Lei, Zhang Ruixue
State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Baoding 071003 China

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Abstract  Multi-sources have participated in the subsynchronous oscillation of renewable energy power system. Conventional approach for state space modeling of multi-sources system is difficult to be employed in the situations where wind power, photovoltaic and thermal power operate parallelly. This paper presents a graphical modeling method, based on a graphical model library containing basic units in the form of state space model. The proposed method can establish the state space according to complex system visually. In addition, it is more convenient for the source-to-grid interface processing. The study case of IEEE first benchmark model for subsynchrnous oscillation verified the proposed method. What’s more, a state space pertaining to the multi-sources system was modeled, where wind power bundled with thermal power transmitted through HVDC line. The influence of wind power on subsynchronous torsional modes belonging to thermal generator was studied. The advantages of graphical modeling method over conventional approach are strong independence, high flexibility, good visibility and strong extensibility.
Key wordsSubsynchronous      oscillation,      state      space,      graphical      modeling,      eigenvalue      analysis     
Received: 18 August 2016      Published: 01 August 2017
PACS: TM614  
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Zhao Shuqiang
Li Ren
Gao Benfeng
Yao Lei
Zhang Ruixue
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Zhao Shuqiang,Li Ren,Gao Benfeng等. A Graphical Modeling Method Applied for Multi-Sources System Subsynchronous Oscillation Analysis[J]. Transactions of China Electrotechnical Society, 2017, 32(14): 184-193.
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