Analysis of PI and PR controllers for distributed power generation system under unbalanced grid faults

2011 International Conference on Power and Energy Systems Pub Date : 2011-12-01 DOI:10.1109/ICPES.2011.6156688

Ashish Ranjan Dash, B. Babu, K. Mohanty, R. Dubey

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引用次数: 30

Abstract

It is the general trend to increase the electricity production using distributed power system (DPGS), which is based on renewable energy sources such as wind, solar, fuel cell etc. These systems are to be properly controlled in order to provide reliable power to the utility network. For that power electronics converters are used as an interfacing device between DPGS and utility network. In case of unbalanced fault, the major problem in distributed power generation system is the phase unbalance which causes the power quality problem along with grid instability. This paper discuses the implementation of two different controllers namely Proportional — integral (PI) and proportional resonant (PR) controllers in order to obtain the control of grid side converter during single phase to ground fault. The analysis includes the grid current harmonic distortion along with the variation of active and reactive power during the fault condition. The system is simulated using MATLAB software and simulation results demonstrate the effectiveness of both the controller.

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电网不平衡故障下分布式发电系统PI和PR控制器分析

以风能、太阳能、燃料电池等可再生能源为基础的分布式电力系统(DPGS)是增加电力生产的大趋势。为了向公用事业网络提供可靠的电力，这些系统必须得到适当的控制。为此，电力电子转换器被用作DPGS和公用事业网络之间的接口设备。在不平衡故障情况下，分布式发电系统的主要问题是相位不平衡导致的电能质量问题和电网不稳定。本文讨论了比例积分(PI)和比例谐振(PR)两种不同控制器的实现，以实现单相对地故障时电网侧变换器的控制。分析了故障状态下电网电流谐波随有功功率和无功功率变化的畸变。利用MATLAB软件对系统进行了仿真，仿真结果验证了控制器的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2011 International Conference on Power and Energy Systems

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