Summary A fuzzy logic peak current control is proposed to extract the maximum power from a wind turbine and reduce the total harmonic distortion of the generator current. This system uses a permanent magnet synchronous generator and a boost rectifier operating in discontinuous conduction mode (DCM). The proposed method includes a fuzzy logic controller, used for deriving the optimum value of DC‐side current, that will be used as reference for the peak current controller. A simulation study is done to verify the validation of the proposed method, also to show the advantages of the system designed to operate in DCM compared with that designed to operate in CCM.

In this paper the modelling and controllability of switched linear singular systems (SLSS) are investigated. First a procedure to draw a hybrid automaton using bond graph approach is proposed. Then, graphical methods are derived in order to determine different conditions for the structural R-I-C-controllability of SLSS systems. These methods are based on simple causal paths and causal manipulations on the switching bond graph model.

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The CGIAR Systemwide Program on Collective Action and Property Rights (CAPRi) is an initiative of the 15 centers of the Consultative Group on International Agricultural Research (CGIAR). The initiative promotes comparative research on the role of property rights and collective action institutions in shaping the efficiency, sustainability, and equity of natural resource systems. CAPRi's Secretariat is hosted within the Environment and Production Technology Division (EPTD) of the International Food Policy Research Institute (IFPRI). CAPRi receives support from the Governments of Norway, Italy and the World Bank. CAPRi Working Papers contain preliminary material and research results. They are circulated prior to a full peer review to stimulate discussion and critical comment. It is expected that most working papers will eventually be published in some other form and that their content may also be revised.

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