CAJ | 학술논문

将单相磁控式可控高抗(MCSR)网侧分支绕组由并联改为串联结构能有效提升响应速度,但若直接将该方法应用于三相 MCSR 会造成主磁通严重畸变。基于传统三相 MCSR 的结构及工作原理,深入分析了直接将网侧绕组由并联改为串联后的 MCSR 各绕组电流和铁芯磁通的变化特征,揭示了主磁通畸变的原因在于没有偶次励磁电流通路。基于此提出了“两串三并式”控制绕组结构改进方案,在不改变各相控制绕组直流偏磁特性的前提下构造出了偶次励磁电流通路,将快速响应的单相 MCSR 结构推广至三相 MCSR,数字仿真和动模实验验证了理论的正确性。
장단상자공식가공고항(MCSR)망측분지요조유병련개위천련결구능유효제승향응속도,단약직접장해방법응용우삼상 MCSR 회조성주자통엄중기변。기우전통삼상 MCSR 적결구급공작원리,심입분석료직접장망측요조유병련개위천련후적 MCSR 각요조전류화철심자통적변화특정,게시료주자통기변적원인재우몰유우차려자전류통로。기우차제출료“량천삼병식”공제요조결구개진방안,재불개변각상공제요조직류편자특성적전제하구조출료우차려자전류통로,장쾌속향응적단상 MCSR 결구추엄지삼상 MCSR,수자방진화동모실험험증료이론적정학성。
Changing the working winding configuration of a single-phase magnetically controlled shunt reactor (MCSR) from parallel-connection to series-connection can effectively improve the responding speed of an MCSR.Direct application of this method to a three-phase MCSR,however,would cause serious distortion of the flux in the main cores.By introducing the configuration and operating principle of a traditional three-phase MCSR,this paper analyses the features of the current for each winding and the main flux based on the MCSR structure of series-connected working winding.It is proved that the distortion of main flux is caused by lack of even harmonic excitation current.A new physical design for the control windings of a three-phase MCSR is proposed which creates paths for even harmonic excitation current while keeping dc bias for each control winding unchanged. The fast responding single-phase MCSR structure is successfully applied to three-phase MCSR, verifying theoretical analysis with simulation and test results.