固体绝缘环网柜用直动式永磁机构的研制

Development of Direct-Acting Permanent Magnetic Actuator of Solid-Insulated Ring Main Unit

设计了固体绝缘环网柜用直动式永磁机构,采用充电电容放电的励磁方式来驱动永磁机构,根据断路器灭弧室的触头反力和分闸弹簧的反力进行反力归算,建立了有限元模型并应用有限元法进行动态仿真。仿真模拟了直动式永磁机构的动作电流以及环网柜的分合闸速度等机械特性,通过固体绝缘环网柜样机的装配调试,实际测量了直动式永磁机构的动作电流以及环网柜开关的机械特性数据。试验结果验证了理论仿真设计的准确性。

This paper designed a direct-acting permanent magnetic actuator of solid-insulated ring main unit, adopting the exciting mode in which the charged capacitors discharged to drive the permanent magnetic actuator. According to the contact counter-force of circuit breakers arc extinguish chamber and separating brakes spring, the counter-forces were carried out reduction and the finite element model was built to carry out dynamic simulation. The action current of direct-acting permanent magnetic actuator was simulated, as well as the divide-shut brake speed of ring main units. Via the assembling debugging of ring main unit prototype, the action current of direct-acting permanent mag- netic actuator was measured, together with mechanical characteristics data of ring main unit switch. The test results verify the accuracy of the theory simulation design.