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- 저자 : Chensheng Li (검색결과 2 건)
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The Study of Maximum Power Point Tracking Control for DFIG based on PSCAD
Li, Dongdong,Wang, Lu,Wang, Yun,Wang, Kaikai,Ye, Chensheng The Korean Institute of Electrical Engineers 2012 The Journal of International Council on Electrical Vol.2 No.3
In recent years, wind power has been developed rapidly. Doubly fed induction generator becomes the main model of wind power become the mainstream due to its high wind energy utilization efficiency and reactive power controllability. On the basis of analyzing the principle and mathematical model of DFIG, dual-loop control system based on the stator flux oriented vector control of DFIG was established, and active and reactive power decoupling control is realized. This paper shows speed control model and power control model which are control modes of the maximum wind power point tracking (MPPT). Simulation results show the control system has good performance and power control mode is more practical and stable than speed control mode.
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A Study of the Relationship between Renminbi Exchange Rates and Chinese Stock Prices
Robert W. Rutledge,Khonkar E. Karim,Chensheng Li 한국국제경제학회 2014 International Economic Journal Vol.28 No.3
This study examines the relationship between Chinese renminbi (RMB) exchange rates and Chinese stock prices over the full study period of 20 July 2001 to 21 July 2011. The study also investigates the relationship between the exchange rate and ten industry-specific indices. Also examined is the effect of two specific events on the ‘exchange rate/stock price’ relationship: (1) the easing of exchange rate controls, and (2) the 2008 start of the global financial crisis. A long-run cointegration relationship is found during the full study period between exchange rates and the Shanghai A-share prices, and for nine of ten industry indices. Granger causality in one direction (i.e., from exchange rates to stock prices, or vice versa) or both directions is found for four of the industry-specific indices. Interestingly, both a long-run cointegration relationship and Granger causality are only found during the most volatile period of managed exchanged rates before the global financial crisis. Implications for Chinese monetary policy makers and global investors are provided.
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