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Research and Developmend of the Observing and Controlling Instrument

Author: ZengBo
Tutor: ChengHanXiang
School: Guangdong University of Technology
Course: Proceedings of the
Keywords: Reactive power compensation FFT ARM7 processor Harmonic Hardware Design Data sampling Software Design Embedded Systems
CLC: TM76
Type: Master's thesis
Year: 2008
Downloads: 68
Quote: 1
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Abstract


According to the new requirements of the power distribution monitoring and control functions of power supply enterprise , has developed a new generation of embedded systems ARM7 processor core measuring control instrument , a new generation of power distribution measurement and control instrument to achieve the high-speed data acquisition technology of electrical quantities and harmonic computing power compensation , the establishment of the mathematical model of the power quality and online real-time calculation method . This article and a detailed description of the new generation of instrument for monitoring hardware circuit design , sampling data processing methods , as well as software design ideas and instrument for monitoring and implementation techniques . Distribution measurement and control instrument , laboratory tests and field practical application of this paper, and the completion of the circuit design , algorithm and implementation techniques is entirely feasible . This paper includes the following sections : ( 1) Introduction Research measuring control instrument and its development direction , principle and control strategy of reactive power compensation and harmonic and reactive current detection methods , focusing on a different wiring capacitor switching transient impact , as well as between the harmonic shunt capacitor hazards, and propose solutions . ( 2 ) the completion of the design of the hardware and software of the device , a detailed analysis of the design process and its features , including the control chip detection calculated switching control and enforcement agencies, as well as anti-jamming design and structure of the controller hardware circuit design , given the physical picture of the controller . Software design using the fast Fourier transform , load voltage , current , harmonic analysis , as the main criterion for switching reactive power , voltage and current harmonic distortion as a secondary criterion , eliminating the light load state switching oscillations to avoid capacitors for harmonic too large cause damage , while the device design the man-machine interface and PC communication serial communication interface . (3 ) the development and field trials of the device , and the development of the situation and experimental results , and the experimental results show that the device is effective to improve the power factor , reduce reactive current , and prove the theoretical study of this topic the correctness and the effectiveness and practicality of the device . Finally, the summary of the whole process of design, development , and results , and pointed out the advantages and disadvantages of a measuring control instrument device developed by this issue , and needs to be improved in the direction and method .

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CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Power system automation
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