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中国电机工程学报 2007, 27(24) 35-42 DOI:
ISSN: 0258-8013 CN: 11-2107/TM |
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| 电机电工 |
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基于瞬时功率变换的介损监测数字化算法 |
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张黎 李庆民 王冠 陈平 |
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山东大学电气工程学院 山东大学电气工程学院 山东大学电气工程学院 山东大学电气工程学院 |
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摘要：
在目前电气设备介质损耗因数的数字化算法中，普遍存在着必须严格满足同步采样条件、计算分辨率低等局限性。为此，基于瞬时功率变换，提出一种提高介质损耗因数监测准确度的数字化新算法，并给出算法的理论基础。该算法无需同步采样，可以跟踪电网频率并实现电阻性电流和电容性电流的分解。仿真结果表明，该算法受采样数据长度、频率跟踪误差的影响较小，在非同步采样的情况下具有良好的应用特性，能够较好地解决实际信号量测中存在的非同步采样问题。 |
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关键词：
介质损耗因数
在线监测
数字化算法
瞬时功率变换
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Development of a Digital Algorithm Based on Instantaneous Power Transform for On-line Monitoring of the Dielectric Loss Factor |
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Abstract:
Among the digital algorithms presently available for on-line monitoring of the dielectric loss factor of power apparatus, there are unavoidable limitations that most of them must meet strictly the synchronous sampling criterion, simultaneously with a low calculating resolution. Based on instantaneous power transform, this paper presents a new digital algorithm to improve monitoring accuracy of the dielectric loss factor, and theoretical basis of the algorithm is also deduced. The algorithm can accurately track the power frequency and decompose the current signals orthogonally into resistive and capacitive components, without recurring to synchronous sampling. Simulation results show that, with very little influence from the sampled data length and frequency tracking error, the proposed algorithm renders good application performance when the sampled data length is not exactly an integer fold of a power cycle, which demonstrates the algorithm can effectively solve the issues incurred from asynchronous sampling. |
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Keywords:
dielectric loss factor
on-line monitor
digital algorithms
instantaneous power transform
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收稿日期 2006-05-25 修回日期 1900-01-01 网络版发布日期 |
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DOI: |
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基金项目:
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通讯作者: 张黎 |
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作者简介: |
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作者Email: zlwyl@sohu.com;zhlieee@gmail.com |
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| 参考文献： |
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| 本刊中的类似文章 |
| 1．王永强 律方成 李和明.采用支持向量机和遗传算法的电容型设备介质损耗因数修正方法[J]. 中国电机工程学报, 2009,29(4): 123-128 |
| 2．段大鹏 江秀臣 孙才新 曾奕 黄成军.基于正交分解的介质损耗因数数字测量算法[J]. 中国电机工程学报, 2008,28(7): 127-133 |
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| Copyright by 中国电机工程学报 |
