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Photovoltaic (PV) grid-connected system is the development trend of photovoltaic systems. According to the PV grid-connected system characteristics, analyzes the maximum power point tracking(MPPT) control strategy based on two-stage power conversion architecture, proposed a novel MPPT control algorithm, it can achieve the maximum power point tracking by only detect one parameter-the inverter output...
DSP control and relative technologies have attracted the attention of multi-disciplines engineering researchers and educators, and are becoming a new and active field. This paper gives some discussions about teaching embedded systems in automation major, such as teaching target, course content, teaching methods and course examination. Through four years' practices, remarkable effects are obtained.
DSP control and relative technologies have attracted the attention of multi-disciplines engineering researchers and educators, and are becoming a new and active field. Think over the characteristic of DSP course teaching, this article developed the DSP experimental system based on the chip of TMS320LF2407 and XC95144. The experimental system mainly consists of a TMS320LF2407 chip, peripherals on board,...
The grid-connected photovoltaic system is the trend of the photovoltaic system. On the basis of the analysis of the equal circuit about the solar cell and the character curve, for the two-stage grid-connected inverter, provide the maximum power point tracking (MPPT) methods, and design a photovoltaic inverter based on the DSP which controls the maximum power point. Trough testing the old designed...
The anti-islanding control of the PV grid-connected inverter has long been a concern of both utilities and generating equipment owners because of the potential for safety hazards and equipment damage. So the islanding effect must be prevented in the application of the grid-connected PV system .In this paper, the theory of passive and active islanding detection methods is analyzed and compared. Then,...
In this paper, the properties of hyperbolic function are analysed at first; then a key exchange algorithm is proposed which is based on improved hyperbolic function in combination with module computation. Moreover in comparison with the correspondent methods such as RSA and EIGamal etc, our algorithm is proven more secure and practical.
Cryptography is the fundamental of secure communication. A public key cryptosystem is necessary to realize secure and efficient communication on public network. To construct a public key cryptosystem, it is essential to find a one-way trap-door function. In this paper, we propose a new one-way trap-door function, and present corresponding encryptosystem. Meanwhile, it is proven that our algorithm...
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