基于改进的滑模频率偏移的孤岛检测方法
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上海绿色能源并网工程技术研究中心资助(13DZ2251900)


Improved slip mode frequency shift method based islanding detection
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    摘要:

    孤岛检测是光伏并网发电系统的重要功能。为了减小孤岛检测装置检测盲区及其对电能质量的影响,在对传统的滑模频率偏移(SMS)研究的基础上,提出一种改进的SMS算法,并对该算法的工作原理、检测盲区进行分析,在数字信号处理(DSP)环境下应用,并在单逆变器和多逆变器并联运行情况下进行仿真研究。仿真结果表明该方法既能保证检测时间短,又能减少对电网电能质量的影响,从而验证了该方法的有效性和实用性。

    Abstract:

    Island detection is an important function of photovoltaic gridconnected power generation system. In order to reduce the dead zone detection effect of the island detection device and its impact on power quality, this paper proposes an improved SMS algorithm based on the research of traditional sliding mode frequency offset (SMS). Its working principle of the algorithm and detection dead zone are analyzed. Then it is applied in the digital signal processing (DSP) environment. The simulation study is performed in the case of a single inverter and multiple inverters in parallel operation. The simulation results show that the method can not only ensure a short detection time, but also reduce the impact on the power quality of the power grid, thus verifying the effectiveness and practicability of the method.

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孙 皓,王鲁杨,恽东军,李 丽,章 婧.基于改进的滑模频率偏移的孤岛检测方法[J].电力科学与技术学报,2020,35(4):141-146. SUN Hao, WANG Luyang, YUN Dongjun, LI Li, ZHANG Jing. Improved slip mode frequency shift method based islanding detection[J]. JOURNAL OF EIECTRIC POWER SCIENCE AND TECHNOLOGY,2020,35(4):141-146.

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  • 在线发布日期: 2020-09-04