电容器组串联用干式半铁心电抗器磁场分布特性的研究

采用场路相结合的方法分析和计算干式半心电抗器的磁场分布规律。首先,利用有限元磁场计算结果求解出干式半心电抗器各并联支路线圈自感及支路线圈间的互感;然后,采用相量法求解出正弦电压激励下各并联支路的电流;最后,采用有限元法建立了干式半心电抗器在电流激励下的轴对称磁场计算模型;分析和计算了铁心对电抗器磁场分布规律的影响,为干式半心电抗器的设计和研制提供了理论依据。

Study on the Magnetic Field Distribution of Dry-type Half-iron Core Reactor for Series Connection of Capacitor Bank

The law of magnetic field distribution of dry type half-iron-core reactors is studied by using field-circuit coupling method.Firstly,the self inductance and mutual inductance of the paralleled branch coils for the dry type half-iron core reactor are obtained by way of finite element magnetic field calculation result.Then,the current of the paralleled branch coils excited by sine voltage is obtained by way of phasor.Lastly,an axial symmetrical magnetic field calculation model of the dry type half-iron core reactor is established by way of finite element,the influence of iron on the rule of magnetic field distribution of reactor is analyzed and calculated,which provides theoretical evidence for the design and development of the dry type half-iron core reactor.