| 引用本文: | 江卫良,陆源,郑作伟,等.基于二次插值算法的采样值保护新算法[J].电力系统保护与控制,2015,43(16):30-35.[点击复制] |
| JIANG Weiliang,LU Yuan,ZHENG Zuowei,et al.A new algorithm on sampled value protection based on quadratic interpolation algorithm[J].Power System Protection and Control,2015,43(16):30-35[点击复制] |
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| 摘要: |
| 针对现有采样值保护存在动作模糊区大、定值不易整定等问题，提出一种新型的基于二次插值算法的采样值保护算法。该算法利用二次插值算法来生成虚拟的过零点采样值，计算数据窗内满足动作条件的时间和数据窗时间的比值，进而将该比值和内部定值进行比较，将比较结果作为保护主判据。该算法在不提高微机保护装置采样率的前提下，能大幅提高采样值保护的动作门槛精度，消除动作模糊区的影响。软件仿真和样机试验结果证明了该算法的有效性。 |
| 关键词: 二次插值算法 采样值保护 微机保护 动作模糊区 |
| DOI：10.7667/j.issn.1674-3415.2015.16.005 |
| 投稿时间：2014-11-06修订日期：2014-12-22 |
| 基金项目:国家科技支撑计划(2012BAA15G01) |
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| A new algorithm on sampled value protection based on quadratic interpolation algorithm |
| JIANG Weiliang,LU Yuan,ZHENG Zuowei,HAO Houtang,MA Ying,LI Yanxin |
| (NARI Technology Co., Ltd., Nanjing 211106, China) |
| Abstract: |
| For the existing sampled value protection, the fuzzy operating zone is too large and the protection settings are difficult to set for users. To solve the above problem, a new algorithm on the sampled value protection based on quadratic interpolation algorithm is proposed. The new algorithm generates virtual zero crossing sampled values based on interpolation algorithm. Within the selected data window, the ratio of meeting the operation conditions time and data window time is calculated, which will be compared with an inner setting. The comparison result is used as a main criterion of the sampled value protection based on interpolation algorithm. The algorithm can greatly improve the accuracy of operating threshold and eliminate the effects of fuzzy operating zone without increasing the sampling rate of computer protection devices. The results of computer simulation and prototype testing demonstrate the validity of the proposed algorithm. |
| Key words: quadratic interpolation algorithm sampled value protection microprocessor-based protection fuzzy operating zone |
