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In this paper, the microgrid which is composed of photovoltaic cells, microturbine, storage device and load is researched. On the basis of analysis of the typical structure of microgrid and the operation modes of every microsource, the program of energy management is presented and designed, and its control strategies are researched under the condition of both grid-connected mode and islanding mode...
A compounded on-line fuzzy controller with self-regulating PID is applied to a DC/DC converter in this paper, its working principle is discussed in detail, and the self-regulating rules of fuzzy discrete coefficient k/sub e/, k/sub ec/ and proportional coefficient k/sub u/ are analyzed deeply. The experimental results show the influence of k/sub e/, k/sub ec/ and k/sub u/ on fuzzy controller, and...
High-frequency (HF) link circuit integrates with a cycloconverter-type dc/ac converter so as to realize a compact, light-weight and bidirectional power flow converter for electrical isolated conditions, such as UPS, new energy systems and special electrical motion systems. However, when the secondary side of HF transformer has no load, the stored magnetic energy in the leakage inductance lacks its...
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