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Research on Parallel Control Technology of Single Phase Inverters

Author: ZhaoJunFeng
Tutor: LiMinYuan
School: Xi'an University of Technology
Course: Pattern Recognition and Intelligent Systems
Keywords: Power inverter Wireless parallel Circumfluence Adaptive droop Integral compensation
CLC: TM464
Type: Master's thesis
Year: 2009
Downloads: 138
Quote: 0
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Abstract


With the emergence of a variety of electrical equipment , power supply put forward higher requirements, such as reliability, stability , and redundancy requirements . Power inverters in parallel can not only increase the capacity of the system to achieve redundancy configuration of the system , and can greatly improve the reliability of the system , however, power inverter parallel operation in the theoretical and practical aspects , there are some problems to be solved . This article studies at home and abroad in parallel to the inverter power control theory and technology, and parallel control program according to the connection between the parallel inverter classification, compare the advantages of the various control programs , shortcomings. Wireless parallel control program to meet the power requirements of electrical equipment , so make sure the focus of this study . Obtained by analysis of the power inverter in parallel model generation of power inverters in parallel circulation and its impact , the amplitude of the output voltage , the phase relationship between the active and reactive power , power indirectly, to control the output voltage , power sharing on the Elimination of circulation . Traditional wireless drooping parallel control of the main problems : (1) steady-state flow accuracy and output voltage control inherent contradiction between accuracy ; ( 2) Output voltage amplitude control reactive power deviation . To solve the above problem , proposed a new method of controlling parallel amplitude droop control using the new adaptive droop control algorithm to divide the degree of reactive power can be further improved , so that the accuracy of the output voltage with conventional droop method Min consistent with the coefficient of output voltage droop . Although the new control method can achieve a good power sharing , the output voltage accuracy is further improved, but the output voltage has declined . Order to further improve the control accuracy of the output voltage , the use of the integral compensation of the output voltage amplitude and frequency compensation, the output voltage reaches the control request . The final design of a 400Hz frequency Inverter parallel integrated control system . Simulation results show that : In this paper, the design of new power inverter parallel integrated control system has good steady-state and dynamic performance , not only eliminates the circulation , but also to ensure the accuracy requirements of the output voltage .

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