| 智能低压电动机保护装置的研究 |
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| 引用本文： | 易攀,石一辉,张承学. 智能低压电动机保护装置的研究[J]. 电力系统保护与控制, 2006, 34(19): 7-10 |
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| 作者姓名： | 易攀 石一辉 张承学 |
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| 作者单位： | 武汉大学电气工程学院 湖北武汉430072 |
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| 摘 要： | 介绍了一种新型的低压电动机保护装置的设计方案。在该设计方案中,硬件部分采用C8051F020单片机完成了数据的采集、计算和保护的判定等功能,面板的显示和整定值的输出则由AT89C55单片机实现。软件部分的主要特点是依据差分滤波算法对全波傅氏算法进行了改进,有效地抑制了电力系统中衰减的直流分量,并且建立了电动机的等值发热模型,从原理上解决了低压电动机的热保护问题,相应简化了装置硬件部分的设计。
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| 关 键 词： | 电动机保护 减法滤波 衰减的直流分量 单片机 过热保护 |
| 文章编号： | 1003-4897（2006）19-0007-04 |
| 收稿时间： | 2006-05-15 |
| 修稿时间： | 2006-05-152006-06-28 |
Study of low-voltage motor protection devices |
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| YI Pan, SHI Yi-hui, ZHANG Cheng-xue. Study of low-voltage motor protection devices[J]. Power System Protection and Control, 2006, 34(19): 7-10 |
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| Authors: | YI Pan SHI Yi-hui ZHANG Cheng-xue |
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| Affiliation: | School of Electrical Engineering, Wuhan University ,Wuhan 430072, China |
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| Abstract: | This paper presents a new-type design scheme for low-voltage motor protection devices.In this design scheme,the hardware adopts C8051F020 single-chip which accomplishes the data acquisition,calculation and protection determination,while the display and the output of set-value are realized by AT89C55 single-chip.The main characteristic of software is utilizing differential-filtering to improve full-wave Fourier algorithm and effectively restraining decaying DC component.Thermal model of low-voltage motor is also established and it has solved the overheating protection problem of low-voltage motor on principle,and thus simplified the hardware design. |
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| Keywords: | motor protection differential-filtering decaying DC component single-chip overheating protection |
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