多极隐极发电机励磁绕组匝间短路时的定子分支环流谐波特性
发布时间：2019-01-08 13:42
【摘要】：为研究多极隐极发电机励磁绕组匝间短路故障机理,揭示多极隐极发电机励磁绕组匝间短路特性,详细推导了多极隐极发电机空载运行时励磁绕组正常与故障状态下,励磁磁动势、定子空载电动势及故障后定子绕组并联支路间环流的表达式。对比分析了故障前、后定子相绕组感应电动势以及定子分支环流,揭示了转子极对数p与故障后定子感应电动势及定子分支环流谐波次数之间的关系;并对励磁绕组短路位置相同、短路程度不同以及短路程度相同、短路位置不同时的谐波环流特性进行了分析,进而得到了定子分支环流与励磁绕组短路位置及短路程度间的关系。以一台核电半速隐极发电机为例,对励磁绕组同位置、不同程度以及同程度、不同位置的短路过程进行了仿真,仿真结果与解析结果一致,验证了理论推导的正确性,为多极隐极发电机励磁绕组匝间短路故障在线定位提供了理论基础。
[Abstract]:In order to study the fault mechanism of inter-turn short circuit in excitation winding of multipole hidden pole generator and reveal the characteristics of inter-turn short circuit of excitation winding of multi-pole hidden pole generator, this paper deduces in detail the normal and fault state of excitation winding of multi-pole hidden pole generator in no-load operation. The expressions of excitation magnetoEMF, stator no-load EMF and the circulation between parallel branches of stator windings after fault. The relationship between rotor pole logarithm p and stator inductive electromotive force and harmonic frequency of stator branch circulation after fault is revealed by comparing and analyzing the induction electromotive force and stator branch circulation before and after fault. The harmonic circulation characteristics of the excitation windings with the same short circuit position, different short circuit degree and the same short circuit degree and different short circuit position are analyzed. The relationship between the stator branch circulation and the short circuit position and the short circuit degree of the excitation winding is obtained. The short-circuit process of the excitation winding in the same position, different degree and different position is simulated by taking a half-speed hidden pole generator of nuclear power as an example. The simulation results are consistent with the analytical results, and the correctness of the theoretical derivation is verified. It provides a theoretical basis for the on-line location of inter-turn short circuit fault in excitation windings of multipole hidden pole generator.
【作者单位】： 哈尔滨理工大学电气与电子工程学院;吉林化工学院信息与控制工程学院;福建省电力科学研究院;
【基金】：国家自然科学基金项目(51407050) 国家重大科技专项(2009ZX06004-013-04-01) 黑龙江省博士后基金项目(LBH-Z15033)资助
【分类号】：TM31
本文编号：2404678
[Abstract]:In order to study the fault mechanism of inter-turn short circuit in excitation winding of multipole hidden pole generator and reveal the characteristics of inter-turn short circuit of excitation winding of multi-pole hidden pole generator, this paper deduces in detail the normal and fault state of excitation winding of multi-pole hidden pole generator in no-load operation. The expressions of excitation magnetoEMF, stator no-load EMF and the circulation between parallel branches of stator windings after fault. The relationship between rotor pole logarithm p and stator inductive electromotive force and harmonic frequency of stator branch circulation after fault is revealed by comparing and analyzing the induction electromotive force and stator branch circulation before and after fault. The harmonic circulation characteristics of the excitation windings with the same short circuit position, different short circuit degree and the same short circuit degree and different short circuit position are analyzed. The relationship between the stator branch circulation and the short circuit position and the short circuit degree of the excitation winding is obtained. The short-circuit process of the excitation winding in the same position, different degree and different position is simulated by taking a half-speed hidden pole generator of nuclear power as an example. The simulation results are consistent with the analytical results, and the correctness of the theoretical derivation is verified. It provides a theoretical basis for the on-line location of inter-turn short circuit fault in excitation windings of multipole hidden pole generator.
【作者单位】： 哈尔滨理工大学电气与电子工程学院;吉林化工学院信息与控制工程学院;福建省电力科学研究院;
【基金】：国家自然科学基金项目(51407050) 国家重大科技专项(2009ZX06004-013-04-01) 黑龙江省博士后基金项目(LBH-Z15033)资助
【分类号】：TM31
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