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This paper presents an advanced monitoring and diagnosis method for detecting of incipient electrical and mechanical faults in a wind-turbine-driven doubly-fed induction generator (DFIG). In this application, the stator windings are directly connected to the grid, whereas a converter controls the rotor currents by means of a Field Oriented Control (FOC) scheme. A new diagnostic method, based upon...
A process for the design and development of a bidirectional buck-boost dc/dc converter for use as a generator controller in a series hybrid electric vehicle is presented. The converter allows a single permanent magnet dc (PMDC) electric machine to be used for both engine starting and generating modes. The power electronics and the control system methodology are studied and refined using the PSCAD/EMTDC...
This paper describes a conceptual design of a distributed generator controller that is capable of undertaking digital relay tasks. This capability makes the controller compliant to IEEE 1547 Standard for Interconnecting Distributed Resources with Electric Power Systems. The paper also presents the controllerpsilas behaviors in over-/under-voltage tests to show its conformance with the IEEE 1547. The...
This paper concerns the effects of generator controller limits on long-term power system stability. It is shown through an example that when the system operates near its limits, saturation in the turbine/governor controllers can lead to frequency instability that would not be evident from load-flow analysis. A linearized model with controller saturation nonlinearity is obtained that preserves the...
The paper investigates experimentally the damping of multi-mode oscillations achieved by a three-dimensional fuzzy logic power system stabilizer on a laboratory system at the Central Research Institute of Electric Power Industries, Japan. The utilized control scheme is based on the polar information of generator state and the scheme is simple enough so as not to require intensive computation for...
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