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A new method for the unintentional islanding test of grid-connected inverters is proposed. The current testing standard uses discrete RLC elements to simulate the test island. Even though the RLC simulated test island is useful for its reproducibility, relative scalability and setup time, as inverter power ratings increase so does the size, cost and setup time of the RLC simulated island. The proposed...
Microwave Tube Simulator Suite (MTSS) is a full-featured software package for microwave tube analysis and design. It has been developed by University of Electronic Science and Technology of China (UESTC) and validated against some helix traveling wave tubes.
Using HFCS-I and MAFIA, the impedance characteristics of a typical helical slow-wave structure (SWS) is studied, in which the non-resonant perturbation (NRP) method is adopted and the direct calculation from discrete electromagnetic (EM) fields is performed. The results from HFCS-I and MAFIA are found to be consistent.
Using beam wave interaction simulator (BWIS), one module of microwave tube simulator suite (MTSS), a wideband helix TWT has been accurately simulated. The slow-wave circuit parameters are calculated by high frequency circuit simulator.
The new version HFCS-E has capability to model SWS with dielectric loss rods. Some helix SWSs are simulated and results show that dielectric loss will cause resonance frequency a small falling, but not obvious difference of other parameters of helical SWS.
This paper studies impulsive synchronization of digital chaotic PN (Psudo-noise) sequences. A new continuous chaotic system which is constructed based on Sprott system, is used to generate the PN sequences via FPGA (Field Programmable Gate Array). Moreover, FPGA technology is also applied to realize the impulsive synchronization between two PN sequences by the chips of Altera Cyclone II EP2C35F484C8...
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