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The Design and Realization of Digital Control Algorithm for Single Phase Inverters

Author: ZuoKeCun
Tutor: MaoLiuPing
School: Hunan University
Course: Circuits and Systems
Keywords: Inverter Deadbeat control Repetitive Control Digital Signal Processing Embedded operating system
CLC: TM464
Type: Master's thesis
Year: 2005
Downloads: 911
Quote: 6
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Abstract


With the development of information technology, power inverter is used widely. However, the traditional analog inverter circuit control leads such as circuit complexity, difficult to debug, easy to aging components, output performance and low inherent drawbacks. With the emergence of high-performance DSP controller, power inverter all-digital control to become a reality. From a technical point of view, digital control power inverter can improve transient, steady-state response, and many other properties, thereby improving inverter output voltage stability and purity levels, but also improve the reliability of the inverter itself . This article conform inverter current trends, proposed and implemented a DSP-based control technology, single-phase sinusoidal inverter digital control algorithms. The article first describes the working principle of the inverter system, analyzes the most commonly used inverter system sinusoidal pulse width modulation method and the method, as well as analog and digital control circuit controls their advantages and disadvantages. Pointed out that the various control strategies mutual complementarity, mutual penetration, mutual economic advantages of integration for the composite controller is a trend lies. These integrated controllers can give full play to their strengths, but also has the excellent performance of the new, better able to meet the inverter control requirements. This went on inverter power inverter system and complete analysis of the system, the establishment of single-phase sine inverter mathematical model. Then for single-phase sinusoidal power inverter, a set based on improved deadbeat and repetitive control combines complex control algorithms. The improved deadbeat control to improve the system dynamic response, improved repetitive control system in order to improve the static response. Matlab simulation shows that the control algorithm in linear periodic nonlinear loads and loads can follow the reference sine wave to obtain a good dynamic and static response effect. In the inverter control algorithm, based on the paper also established a DSP microprocessor-based control chip TMS320LF2407 single-phase sine inverter controller experimental platform, which also includes single-phase sine inverter composed of the desired sampling, drive protection module, followed by the experimental methods described herein in detail, according to the national standards for the series of tests, in each case from the test results can be seen, the use of the complex control algorithms for single-phase sine wave obtained by high stability , less distortion. Finally, the design of the individual sine inverter power control algorithm is applied to the digitized composite uninterruptible power supply design, propose and test the use of embedded operating system for scheduling algorithm uC/OS- Ⅱ digitized uninterruptible power supply design.

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CLC: > Industrial Technology > Electrotechnical > Transformers, converters and reactors > Converter > Inverter
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