| 微网混合式孤岛检测及运行模式切换研究 |
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| 作者姓名： | Yang Xiao Jinxin Ouyang Xiaofu Xiong Yutong Wang Yongjie Luo |
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| 作者单位： | 同济大学电子与信息工程学院,上海 201804;同济大学电子与信息工程学院,上海 201804;同济大学电子与信息工程学院,上海 201804;同济大学电子与信息工程学院,上海 201804 |
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| 基金项目： | 国家科技支撑计划项目资助(2015BAG19B02); 上海市科委项目资助(13DZ1200403) |
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| 摘 要： | 孤岛运行是微网稳定控制的核心内容，而非计划孤岛检测是微网在故障解列时转入稳定孤岛运行的前提条件。提出一种基于电压-相角下垂控制的混合式孤岛检测方法。结合被动式的过/欠频、过/欠压检测法和基于正反馈的主动式孤岛检测法，实时感知非计划孤岛。通过负荷调度，快速实现网内功率平衡，保证网内负荷的供电连续性。在Matlab/Simulink中搭建微网系统模型，通过多复杂工况对所提方法进行仿真验证。
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| 关 键 词： | 微网 下垂控制 混合式孤岛检测 功率调节 模式切换 |
| 收稿时间： | 2019/3/6 0:00:00 |
| 修稿时间： | 2019/4/22 0:00:00 |
Fault protection method of single-phase
break for distribution network considering
the influence of neutral grounding modes |
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| Yang Xiao,Jinxin Ouyang,Xiaofu Xiong,Yutong Wang,Yongjie Luo.Fault protection method of single-phase
break for distribution network considering
the influence of neutral grounding modes[J].Power System Protection and Control,2020,5(2):1-13. |
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| Authors: | Yang Xiao Jinxin Ouyang Xiaofu Xiong Yutong Wang Yongjie Luo |
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| Affiliation: | College of Electronic and Information Engineering, Tongji University, Shanghai 201804, China,College of Electronic and Information Engineering, Tongji University, Shanghai 201804, China,College of Electronic and Information Engineering, Tongji University, Shanghai 201804, China and College of Electronic and Information Engineering, Tongji University, Shanghai 201804, China |
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| Abstract: | With the rapid development of modern distribution network and the access of distributed generation, the network
structure is becoming increasingly complex. Frequent single-phase break faults have seriously affected equipment
and personal safety and stable operation of the power system. However, with the development and application of
the composite neutral grounding modes, the protection of single-phase break fault is facing new challenges. This
paper proposes a protection method of single-phase break fault for distribution network considering the influence
of neutral grounding modes. The characteristics of neutral voltage and sequence current are analyzed under
normal operation and single-phase break fault with different grounding modes. Following this, the protection
criterion based on neutral voltage and sequence current variation is constructed. The protection method of singlephase
break fault for distribution network is proposed, which is applicable for various neutral grounding modes.
Theoretical analysis and simulation results show that the protection method is less affected by system asymmetry,
fault location and load distribution. The method has higher sensitivity, reliability and adaptability. |
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| Keywords: | Distribution network Single-phase break fault Protection Neutral grounding |
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