Time filter

Source Type

Li S.-Q.,Hunan University of Technology | Li W.-Z.,Hunan University of Technology | Xu W.-X.,Hunan University of Technology | Zeng H.-Y.,Hunan University of Technology | Hou K.-X.,Henan Senyuan Electrical Co.
Dianli Xitong Baohu yu Kongzhi/Power System Protection and Control | Year: 2013

In order to improve the micro-power quality as well as the running reliability, the storage unit from micro-grid is combined with active power filter. Taking the advantage of the similarity of main circuit structure and the complementary function between micro-grid energy storage unit and active power filter, this paper makes a combination to realize "one machine serves several purposes ", which can also save investment costs. It analyzes the structural characteristics of the combined device, gives the combination principle, establishes the combined overall system dynamic mathematical model, and applies space vector control strategy which can improve the control precision and response speed. The simulation and experimental results show that the device can achieve the purposes of adjusting active power and reactive power and suppressing harmonic of micro-grid, and verify the rationality and effectiveness of the combined device.

Mu K.,Henan Institute of Engineering | Liu C.,Zhongyuan University of Technology | Peng J.,Zhengzhou University | Peng J.,Henan Senyuan Electrical Co.
Journal of Control Science and Engineering | Year: 2015

Based on fuzzy logic system (FLS) and H control methodologies, a robust tracking control scheme is proposed for robotic system with uncertainties and external disturbances. FLS is employed to implement the framework of computed torque control (CTC) method via its approximate capability which is used to attenuate the nonlinearity of robotic manipulator. The robust H control can guarantee robustness to parametric and dynamics uncertainties and also attenuate the effect of immeasurable external disturbances entering the system. Moreover, a quadratic stability approach is used to reduce the conservatism of the conventional robust control approach. It can be guaranteed that all signals in the closed-loop are bounded by employing the proposed robust tracking control. The validity of the proposed control scheme is shown by simulation of a two-link robotic manipulator. © 2015 Kun Mu et al.

Fan G.,Henan Senyuan Electrical Co. | Pan Y.,Henan Senyuan Electrical Co. | Wang Y.,Henan Senyuan Electrical Co.
Yadian Yu Shengguang/Piezoelectrics and Acoustooptics | Year: 2015

According to the actual situation of power system, the existing inadequacies of the current temperature measurement technology were analyzed. An intelligent temperature monitoring system was designed based on the characteristics of the high precision and powerful features of SAW temperature sensor and STM32 processor. SAW sensor was used to detect temperature in the system, taking STM32 as the core to control the transmission and reception signals, and to process and communicate the temperature data. The principle of SAW sensor and the performance of STM32 were introduced, providing the solution for temperature monitoring system and the designing ideas of hardware and software. Experiments showed that, comparing with the existing temperature measurement device, this system had higher reliability and operability, providing a powerful guarantee for the safe and reliable operation of the power system. © 2015, Sichuan Institute of Piezoelectric and Acoustooptic Technology. All right reserved.

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