Parametric Design Of High-voltage Vacuum Interrupter

Vacuum circuit breaker is a kind of high-voltage switch equipment. With thesuccessful implementation of the “oil-free” renovation of electric power system and therapid development of vacuum power equipment manufacturing technology, vacuum circuitbreakers have been widely used in daily life and production process in our country,especially in the domain of mid-voltage equipment, and it would be more little and popularin the domain of higher voltage equipment. As the core component of vacuum circuitbreaker, vacuum interrupter must have excellent insulating properties. In order to improvethe voltage resistance level and the design level of vacuum interrupter, the dissertation putforward a method to establish the optimization of electric field distribution and theparameterized design of its CAD system.In the past, the insulation design of the high-voltage vacuum interrupter is usually onthe purpose to solve the electric field uniformity and dielectric strength of the contactclearance, but it is hard to get to optimization of the overall structure of electric field toimprove the insulating properties. Based on the72.5kV high-voltage vacuum interrupter,using the ANSYS finite element analysis software to optimizes design of the high voltagevacuum interrupter, set its internal axial size of the shield as the optimize design variableand set the objective function as minimum variance of electric field distribution. Comparedwith the previous condition, optimization results show that the field intensity decreasedgreatly and the electric field of variance embraced less volatile. In addition, the contactbetween the peak electric field decreased and is transferred to the second auxiliary gapbetween the shield. Results show that electric field distribution of the vacuum interrupter islargely related to the size of the shield and the indoor distribution of electric field invacuum interrupter become more even. This method effectively improves its insulatingproperties and voltage resistance level.The idea of parameterized design is put forward to solve the problem of vacuuminterrupter at the design level. This paper is based on Visual C++tools and the secondarydevelopment of AutoCAD ObjectARX to conduct parameterized design of vacuuminterrupter. The internal main shielding, for example, it needs to write codes and debug toestablish the human-computer interaction interface. The users only need to input or modify the corresponding performance parameters to get the desired2d graphics. By using themethod of parameterized design, the time of drawing and design decreased greatly.Parameterized design is an effective way and plays a positive role in the design efficiencyand quality of vacuum interrupter.