| 隐极同步发电机转子匝间短路时转子不平衡磁拉力特征分析 |
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| 引用本文： | 李扬,郝亮亮,孙宇光,王祥珩,吴俊勇,张广韬.隐极同步发电机转子匝间短路时转子不平衡磁拉力特征分析[J].电力系统自动化,2016,40(3):81-89. |
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| 作者姓名： | 李扬 郝亮亮 孙宇光 王祥珩 吴俊勇 张广韬 |
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| 作者单位： | 北京交通大学电气工程学院, 北京市 100044,北京交通大学电气工程学院, 北京市 100044,清华大学电机工程与应用电子技术系, 北京市100084; 电力系统及发电设备控制和仿真国家重点实验室, 清华大学, 北京市 100084,清华大学电机工程与应用电子技术系, 北京市100084; 电力系统及发电设备控制和仿真国家重点实验室, 清华大学, 北京市 100084,北京交通大学电气工程学院, 北京市 100044,北京交通大学电气工程学院, 北京市 100044 |
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| 基金项目： | 国家自然科学基金资助项目(51307005);中央高校基本科研业务费专项资金资助项目(2015YJS149,KEJB15016536,KERC14003536) |
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| 摘 要： | 考虑到转子匝间短路会在定子回路产生与极对数和定子绕组形式有关的偶数次和分数次不平衡电流分量,首先基于不平衡电流谐波分量产生的各次谐波磁动势,推导了转子在定子直角坐标系中不平衡磁拉力(UMP)的表达式,并根据故障时定、转子磁动势的特点,得到了故障后UMP的频率分量表达形式,形成了一套完整的故障时UMP特征分析方法。用该方法对不同极对数的隐极发电机样机转子匝间短路故障进行了分析,并通过基于ANSOFT软件的场路耦合计算得到了故障中转子电磁力的数值结果。仿真结果符合理论分析的UMP特征,验证了所提出的转子受力分析方法的正确性。理论分析与仿真结果均表明,不同极对数和定子绕组形式的发电机故障时转子UMP的谐波特征不同,为机电信息融合的转子匝间短路故障监测奠定了基础。
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| 关 键 词： | 隐极同步发电机 转子匝间短路 故障特征 不平衡磁拉力 有限元模型 |
| 收稿时间： | 2015/5/20 0:00:00 |
| 修稿时间： | 2015/10/22 0:00:00 |
Characteristic Analysis of Unbalanced Magnetic Pull Caused by Non-salient Pole Synchronous Generator Rotor Inter-turn Short Circuit Fault |
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| LI Yang,HAO Liangliang,SUN Yuguang,WANG Xiangheng,WU Junyong and ZHANG Guangtao.Characteristic Analysis of Unbalanced Magnetic Pull Caused by Non-salient Pole Synchronous Generator Rotor Inter-turn Short Circuit Fault[J].Automation of Electric Power Systems,2016,40(3):81-89. |
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| Authors: | LI Yang HAO Liangliang SUN Yuguang WANG Xiangheng WU Junyong and ZHANG Guangtao |
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| Affiliation: | School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China,School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China,Department of Electrical Engineering, Tsinghua University, Beijing 100084, China; State Key Laboratory of Control and Simulation of Power Systems and Generation Equipments, Tsinghua University, Beijing 100084, China,Department of Electrical Engineering, Tsinghua University, Beijing 100084, China; State Key Laboratory of Control and Simulation of Power Systems and Generation Equipments, Tsinghua University, Beijing 100084, China,School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China and School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China |
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| Abstract: | The rotor winding inter-turn short circuit fault will generate an even number of and fractional harmonic unbalanced current components related to the number of pole-pairs and stator winding configurations in stator loops. Considering the above situation, the expression of the unbalanced magnetic pull(UMP)in the coordinate axis direction of stator Cartesian coordinates is derived based on the harmonic magnetomotive force(MMF)caused by the harmonic component of unbalanced current. Secondly, according to the characteristics of the stator and rotor MMF, the expression of frequency of UMP is obtained and a complete characteristic analytic method for UMP under a fault is formed. This method has been applied in the rotor inter-turn short circuit fault analysis in non-salient pole generator prototypes with a different number of pole-pairs. The numerical result of the rotor electromagnetic force in a fault is calculated by the field circuit coupling of ANSOFT software. Simulation results are consistent with the findings of theoretical analysis, which proves the correctness of this method. Both theoretical analysis and simulation results show that generators with a different number of pole-pairs and stator winding configurations will have UMP with different harmonic characteristics, which lays the foundation for fault monitoring by merging electro-mechanical information. This work is supported by National Natural Science Foundation of China(No. 51307005)and Fundamental Research Funds for the Central Universities(No. 2015YJS149, No. KEJB15016536, No. KERC14003536). |
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| Keywords: | non-salient pole synchronous generator rotor inter-turn short circuit fault characteristics unbalanced magnetic pull(UMP) finite element model |
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