CAJ | 학술논문

目前大量有关双馈感应电机非对称故障的分析,都是直接运用对称分量法将其进行分解.原则上这是毫无疑问的,但是没有相关的文章从磁场等效的角度并结合数学推导去证明该方法的可行性.因此,本文首先按照磁场等效的原则,将非对称故障电流分解为正序对称电流和负序对称电流(由于双馈电机中不含中线,故其不存在零序电流).然后再按照对称分量法将其进行分解得到相应的正序和负序对称电流,最后发现两种方法所得到的正序与负序电流是完全相同的,从而也就从磁场等效的角度严格证明了直接运用对称分量法分解双馈感应电机非对称故障的合理性.
목전대량유관쌍궤감응전궤비대칭고장적분석,도시직접운용대칭분량법장기진행분해.원칙상저시호무의문적,단시몰유상관적문장종자장등효적각도병결합수학추도거증명해방법적가행성.인차,본문수선안조자장등효적원칙,장비대칭고장전류분해위정서대칭전류화부서대칭전류(유우쌍궤전궤중불함중선,고기불존재령서전류).연후재안조대칭분량법장기진행분해득도상응적정서화부서대칭전류,최후발현량충방법소득도적정서여부서전류시완전상동적,종이야취종자장등효적각도엄격증명료직접운용대칭분량법분해쌍궤감응전궤비대칭고장적합이성.
@@@@A large number of analyses of the asymmetric fault for DFIG are directly using symmetrical component method to de-compose at present. In principle, there is no doubt about it, but there are no related papers to prove the feasibility of this method from the magnetic equivalent combined with the mathematical derivation. Therefore, in this paper, according to the principle of mag-netic equivalent, the asymmetric fault current is decomposed into the positive sequence current and negative sequence current (the DFIG has not the center line, so there is no zero sequence current). Then according to the symmetrical component method to get the corresponding positive sequence and negative sequence current, and finally found that positive sequence and negative sequence cur-rent are completely same from two different methods. Thus strictly proved the correctness which the decomposition of the asymmet-ric fault for DFIG by using symmetrical component method directly.