| 引用本文: | 郑涛,袁飞,王燕萍,等.基于模糊控制的快速无盲区的频移式孤岛检测法[J].电力系统保护与控制,2014,42(23):38-43. |
| ZHENG Tao,YUAN Fei,WANG Yan-ping,et al.A fast frequency drifts islanding-detecting method without non-detecting zone based on fuzzy control[J].Power System Protection and Control,2014,42(23):38-43 |
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| 摘要: |
| 孤岛检测对于分布式系统的安全稳定运行极其重要，但是传统的孤岛检测方法常常难以兼顾电能质量与检测效率。为了解决这一问题，提出了一种基于模糊控制的快速无盲区频率偏移孤岛检测方法。该方法将模糊控制与带正反馈的主动频率偏移法(AFDPF)相结合，利用模糊控制的原理，根据PCC点的频率变化量和频率变化率自适应选取AFDPF的系数。相对于传统的AFDPF方法，新方法在DG系统并网运行时对电能质量的影响极小，在发生孤岛时能够进行快速检测，并且可以有效地消除检测盲区。在电力系统发生扰动时，不影响系统频率，也不会产生误判。 |
| 关键词: 分布式系统 孤岛检测 AFDPF 模糊控制 电能质量 |
| DOI：10.7667/j.issn.1674-3415.2014.23.006 |
| 分类号: |
| 基金项目:国家电网公司科技项目资助（宁夏电力公司科技项目SGNX0000DKJS1300713） |
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| A fast frequency drifts islanding-detecting method without non-detecting zone based on fuzzy control |
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ZHENG Tao1, YUAN Fei1, WANG Yan-ping1, WANG Zeng-ping1, LIU Yi-chen1, HUANG Wen1, WANG Xiao-li2
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1.State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China;2.Ningxia Electric Power Company, Yinchuan 750001, China
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| Abstract: |
| The islanding-detection is important for the DG system. But the traditional islanding-detection cannot ensure the good detecting performance and the electric power quality at the same time. In order to solve this problem, a new islanding-detection method is proposed. This method combines fuzzy control with active frequency drifting with positive feedback (AFDPF), which can choose the coefficients of AFDPF based on fuzzy control. Compared with AFDPF, this method can detect the islanding faster with less impact on power quality when the DG system is connected to the grid, and eliminate the non-detecting zone. When the system is disturbed, the new method does not affect the frequency of system and would not judge it as islanding. |
| Key words: DG system islanding-detection AFDPF fuzzy control power quality |
