| 自适应加权形态梯度在变压器保护中的应用 |
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| 引用本文： | 马静,王增平. 自适应加权形态梯度在变压器保护中的应用[J]. 电力系统自动化, 2006, 30(17): 59-64 |
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| 作者姓名： | 马静 王增平 |
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| 作者单位： | 华北电力大学电力系统保护与动态安全监控教育部重点实验室,河北省保定市,071003;华北电力大学电力系统保护与动态安全监控教育部重点实验室,河北省保定市,071003 |
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| 基金项目： | 华北电力大学博士学位教师科研基金资助(200512003)。 |
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| 摘 要： | 在分析数学形态学基本形态变换及其组合形式的基础上，利用自适应方法实现形态梯度自适应加权组合，在提取高频暂态电流信号的同时，可有效抑制随机噪声的影响。在比较励磁涌流和故障电流形成暂态信号能量谱各自特点的基础上，提出了一种变压器保护新方案。该方案不受对称性涌流和非周期分量的影响。2套动模试验系统均验证了该方案的可行性。
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| 关 键 词： | 变压器保护 形态梯度 自适应 暂态电流 励磁涌流 短路电流 |
| 收稿时间： | 2005-11-02 |
| 修稿时间： | 2005-11-022006-04-27 |
Application of Morphological Gradient with Adaptive Weighting in Transformer Protection |
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| MA Jing,WANG Zengping. Application of Morphological Gradient with Adaptive Weighting in Transformer Protection[J]. Automation of Electric Power Systems, 2006, 30(17): 59-64 |
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| Authors: | MA Jing WANG Zengping |
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| Affiliation: | Key Laboratory of Power System Protection and Dynamic Security Monitoring and Control under Ministry of Education North China Electric Power University, Baoding 071003, China |
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| Abstract: | On the basis of basic morphological transforms and their combined modes, transient current signals can be extracted by use of morphological gradient with adaptive weighting. Meanwhile various kinds of additive noises are effectively suppressed by adaptive approach. Based on the different characteristics of spectrum analysis of extracted transients between the short circuit current and the inrush current, a new method of transformer protection is proposed. This method can avoid the symmetrical inrush current and non-periodic components can be sufficiently depressed. The results of dynamic simulation verify the feasibility of the proposed method. |
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| Keywords: | transformer protection morphological gradient adaptive approach transient current signal inrush current short circuit current |
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