The ring network cabinet is one of the widely used transmission and distribution equipment in high voltage transmission and distribution. In recent years, the market has continuously improved the environmental protection and intelligent requirements of the distribution network equipment, such as the ring network cabinet and other products. Because of the existing environmental pollution problems, the existing SF6 gas ring cabinet will be replaced by environmental protection ring network cabinet, and the solid insulating ring cabinet in some areas, such as East China and Southern China, is very vulnerable to condensation and water accumulation in some areas, such as East China and Southern China. The harm is great. Therefore, the industry actively explore the use of vacuum breaking technology and the use of environmental protection gas insulated ring cabinet, and domestic existing enterprises such as Suzhou Langer, Beijing Si Wei, Xu electric and other enterprises developed environmental protection gas ring cabinet.

Throughout its existing products, the switchgear switchgears are all spring operated mechanisms. Because of its many components, the spring operation mechanism has great influence on the reliability of the switch. According to statistics at home and abroad, more than 60% of the failures of switchgear are due to the mechanical failure of the traditional spring operating mechanism [1]. According to this, the permanent magnet mechanism with simple structure and high reliability is used to match the open operation of environmental gas ring network cabinet, which makes it possible for the product of environmental gas ring net cabinet to be more demanding for long life and maintenance free. At the same time, in addition to the DTU device, the ring cabinet is equipped with the first phase control and closing technology in the aspect of intelligent control, which makes the switching phase voltage of the switchgear switch closing, limiting the inrush and reducing the impact on the power grid.

Solid modeling of 1 permanent magnet operating mechanism

The object of the study is 12kV permanent magnet intelligent environmental protection gas cabinet. In the 3D solid modeling software SolidWorks, a permanent magnet operating mechanism model of ring net cabinet is established. The permanent magnet operating mechanism is a monostable permanent magnet operating mechanism, the sluice spring is outside the permanent magnet operating mechanism, and the drive part uses the driving axis rotation and the three phase linkage.

Simulation and analysis of dynamic characteristics of 2 permanent magnet operating mechanism

The dynamic characteristic of the permanent magnet operating mechanism is that the operating current of the coil is not zero, that is, in the process of the switching state of the permanent magnet operating mechanism, the relationship between the mechanical characteristics, the motion characteristics and the voltage and current change characteristics formed with the permanent magnet is the mechanical system, the electromagnetic system, especially the electric power of the permanent magnet operating mechanism. The design basis and performance evaluation basis of source and control system. The dynamic characteristics are time-varying and electromagnetic fields are coupled in three fields, and are dynamic under the condition of permanent magnetic field.

Before the simulation, the solution type of the simulation model is changed to the transient solution mode, and a Band motion domain is set up to encircle the moving range of the moving iron core, and the motion parameters of the moving iron core are set up. In addition, for the analysis of the dynamic characteristics of permanent magnetic actuator, it is necessary to set the number of turns of the coil and select the current direction to add the external circuit. The external circuit sets up the simulation circuit in the Ansoft Maxwell Circuit Editor editor software, and sets up the capacity and voltage of the capacitor, the resistance and inductance of the coil and the time of the coil. After the setup is completed, operation analysis and self check can be carried out, and then dynamic characteristic simulation analysis can be carried out.

(1) this experiment combined with the finite element software Maxwell to simulate the permanent magnetic operating mechanism design of the permanent magnet intelligent environmental gas cabinet. The static and dynamic characteristics of the prototype are obtained. The test results of the prototype are consistent with the design simulation results. At the same time, the correctness of the simulation analysis method is verified.

(2) using the simulation analysis, the mechanical characteristics of the permanent magnet environmental gas cabinet during the closing process are obtained. It can provide a method to improve the performance parameters of the product, and can effectively improve the product performance and shorten the design cycle of the new product.