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Research of Inverter Parallel Technology in high power AC Drive System

Author: CaoYanQing
Tutor: LinZuo
School: Huazhong University of Science and Technology
Course: Power Electronics and Power Drives
Keywords: AC variable speed Inverter Inverter In parallel Control strategy
CLC: TM464
Type: Master's thesis
Year: 2009
Downloads: 203
Quote: 1
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Abstract


In recent years , high-power AC variable speed has been rapid development , on the basis of the existing power switching devices because of the limitations of the manufacturing technology of high - power switching devices , a variety of topologies to meet the requirements of high - power inverter , which drives in parallel structure is an effective way to achieve high-current inverter , study parallel control of the inverter technology has important application value . In this paper, parallel synchronous motor powered inverter air-gap magnetic field oriented vector control speed control system as the research object to study the circulation characteristics of parallel inverter inverter parallel circulation of the fundamental component , DC circulation component , harmonic wave the circulation components as well as zero sequence circulation component causes. On this basis , the parallel inverter topology and control program , and that the parallel inverter using two sets of independent rectifier - inverter structure , in order to avoid the circulation component of the zero sequence current control policy control to reduce the circulation of the fundamental component. The analysis and comparison of the synchronization control strategy , unified control strategy to respectively control strategy three pros and cons of the current control strategy , select a unified control strategy to control parallel inverters of this article , this control strategy of two inverter output current and circulation unified control . Feedback composite control ability to control the circulation the traditional voltage feedforward plus current parallel inverter speed control system powered using only the current loop feedback control point of view , the design of the current controller , and through simulation studies parallel inverter system performance of different control strategies , and to verify the feasibility and advantages of the design of the current controller . This paper introduces the main circuit of the the parallel inverter powered AC variable speed system experiment platform , and design software program based on three DSP and CAN bus communication control circuit of the main structure , to write a parallel inverter current control strategy , the parallel inverter powered AC speed control system of the steady-state and dynamic experimental results show that the parallel inverter current control strategy design can be very good to suppress fundamental circulation system dynamic and steady-state performance .

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