Advanced Materials Research Vols. 846-847

Abstract: The current control method based on double hysteresis current control and space vector is taken, so that the current tracing control of three phase VSR can realized. The predictive current control based on BP algorithm is presented, and the drawback that there is beat during the control of SVPWM based on hysteresis can be made up, which has serious influence on the current tracing when the difference value changed violently. Without the rise of sampling frequency, the reference offset current of next time is predicted using of historical current. The simulation results show that the predictive current control based on BP algorithm is correct and valid. The deadbeat control of SVPWM based on hysteresis is realized, less harmonic current and better tracing are got.

Abstract: The paper designs a three-phase high voltage power supply system based on active disturbance rejection controller which make single-chip microcomputer ATmega128 as the main control chip and the system improve the stability and control precision of dust removing power. Engineering practice shows that, the DC power supply system has the advantages of convenient operation, high work efficiency, system stability.

Abstract: The paper analyzes the current wind power plants monitoring system problems and the impact on the grid. Proposed structure for smart monitoring system of wind power plants based on IEC61400-25 and IEC61850.The system uses three level of station level and bay level and process level. System uses information modeling of object-oriented approach for wind power plants. Using maps to IEC61850-8-1 MMS protocol stack communication service mapping is proposed. Wind power plants monitoring system and substation monitoring system uses the integrated design.

Abstract: The clean and renewable distributed generations (DGs) could be combined in microgrid. Keeping microgrid bus voltage stable is very important. This paper proposes an integrated control strategy of combining droop control and V/f control. A complementary wind-solar-energy storage microgrid model is built based-on Simulink software. The effect on voltage stability based on the integrated control strategy is analyzed.

Abstract: The radar micro-Doppler signatures of human gait have been investigated and applied to many practical use since late 1990s.Human body can be modeled as jointly connected rigid segments or links. And yet the model was confined to the walking gait. In order to apply the model to different circumstances, the paper modified the currently used human walking model into three different models. Firstly, the analysis of human crouch walking with arms was given. Then radar echo of the model was provided, whose correctness and effectiveness were proved through simulation. Secondly the other two gaits,running and crawling, were modeled in the same way. Finall the paper constructed scenes that two men walked in varied walking gaits, through simulation conclusion was drawn that if two people walked in cetain different gaits,those two different gaits can be distinguished.

Abstract: For software radar, different functions are realized by software running on standard hardware platform, which brings to great predominance over traditional radar. In this paper, realizable structure of software radar was analyzed, and hardware platform based on computer was studied. Two hardware architectures, one-computer architecture as well as computer cluster architecture were raised based on computer. The one-computer architecture is available to radars that cubage is restricted, while computer cluster architecture is applied in huge radar with complex computation.

Abstract: Battery package and battery manage system of eletric vehicle need ata recording, data analysis and experimental process control. In this article an industrial battery manage system based on CAN bus was describe. The topology of CAN contains an upper machine developed in LabVIEW, a main control board and eight acquisition boards. CAN bus makes it convenient to build a distributed system and achieve real-time and reliable communication.

Abstract: A centralized mode of protection and control system based on digital information is proposed, communications platform networking, information sharing standardized characteristics of intelligent substation. This model describes the centralized protection and control system architecture and its main hardware, research on the time required for the system strategy and the "triple nets" and other key technologies, and put into implemented and applied. At Hejia 220kV substation intelligent centralized protection and control system set its key consideration on functional integration, improve equipment integration, optimize resources, and information sharing, System model for the future direction of development of intelligent substation has a leading and exemplary role.

Abstract: Electronic delivery system is an important part of the textile process, The control performance of the fit and unfit quality directly affect the quality of the loom weaving. The traditional electronic let-off system is often single shaft control the rotation of the beam. This paper studies the multiaxial let-off system, Implementation of carbon fiber braided Angle of multilayer structure. In the system hardware design, servo system by ac servo motor convert electrical signal into mechanical displacement; TMS320LF2407 let off part of the control system is chosen to realize the electronic let-off system of this project, Mainly includes the controller chip TMS320LF2407 and the outside of the extension module, Its specific data including master control module, power supply and reset, (tension) information acquisition module, servo driver, serial communication module, the starting circuit, etc.

Abstract: According to the characteristics of carbon fiber and tension requirement of multilayer angle interlocking loom, tension in the weaving process of carbon fiber needs to be consistent.Based on this requirement, a kind of fuzzy PID controller is designed.Through the real-time detection and feedback of tension sensor, the fuzzy PID controller for the tension control system compensates tension timely, so as to realize the constant tension.In this article, the design ideas of analog PID controller, parameter adjustment rules are introduced.The simulation of tension control system has been done through MATLAB software.The results show that the controller can meet the control requirements.