Analysis, design, and experimental evaluation of power calculation in digital droop-controlled parallel microgrid inverters

Parallel operation of distributed generation is an important topic for microgrids, which can provide a highly reliable electric supply service and good power quality to end customers when the utility is unavailable. However, there is a well-known limitation: the power sharing accuracy between distri...

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Veröffentlicht in:Frontiers of information technology & electronic engineering 2013, Vol.14 (1), p.50-64
Hauptverfasser: Gao, Ming-zhi, Chen, Min, Jin, Cheng, Guerrero, Josep M., Qian, Zhao-ming
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Chen, Min
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Guerrero, Josep M.
Qian, Zhao-ming
description Parallel operation of distributed generation is an important topic for microgrids, which can provide a highly reliable electric supply service and good power quality to end customers when the utility is unavailable. However, there is a well-known limitation: the power sharing accuracy between distributed generators in a parallel operation. Frequency and voltage droop is a well-established control method for improving power sharing performance. In this method, the active and reactive power calcu- lations are used to adjust the frequency and amplitude of the output voltage. This paper describes the digital implementation of a droop method, and analyzes the influence of power calculation on droop method performance. According to the analysis, the performance of droop control in a digital control system is limited by the accuracy and speed of the power calculation method. We propose an improved power calculation method based onp-q theory to improve the performance of the droop control method, and we compare our new method with two traditional power calculation methods. Finally, simulation results and experimental results from a three single-phase l-kW-inverter system are presented, which validate the performance of our proposed method.
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subjects Communications Engineering
Computer Hardware
Computer Science
Computer Systems Organization and Communication Networks
Control methods
Control systems
Digital
Distributed generation
Electric potential
Electric power generation
Electric power grids
Electrical Engineering
Electronics and Microelectronics
Instrumentation
Inverters
Mathematical analysis
Networks
Parallel operation
Performance enhancement
Reactive power
Voltage
优秀论文
医学期刊
编辑工作
英文摘要
title Analysis, design, and experimental evaluation of power calculation in digital droop-controlled parallel microgrid inverters
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