CN-121997701-A - Design method, system and medium of basin-type insulator particle catcher

Abstract

The invention discloses a design method, a system and a medium of a basin-type insulator particle catcher, relates to the technical field of high-voltage equipment manufacturing, and aims to improve the insulation reliability of a direct-current GIL power transmission system and ensure the safe and stable operation of a power transmission line in a special environment. Metallic particles generated during production, transportation, assembly, and operation of GIL may damage the insulation performance of the equipment, causing discharge accidents. According to the invention, the geometric structures of the basin-type insulator and the particle catcher are cooperatively optimized, so that the electric field distribution is changed, the influence of metal particles on the insulation performance is reduced, the probability of partial discharge and surface flashover is reduced, and the safety and reliability of equipment operation are ensured.

Inventors

• ZHANG CHANGHONG
• LI MINGYANG
• LI WEIGUO
• YANG XU
• HOU MINGCHUN
• WANG JUN
• HUANG JIAJIE
• WANG LIPING
• LIU RUONAN

Assignees

• 中国南方电网有限责任公司超高压输电公司电力科研院

Dates

Publication Date

20260508

Application Date

20251215

Claims (10)

1. 1. A design method of a direct current GIL basin-type insulator particle catcher is characterized by comprising the following steps: Step one, establishing a DC GIL basin-type insulator simulation design model, and setting related parameters; Calculating electric field distribution of the simulation design model, and analyzing metal particle driving performance of the simulation design model; Optimizing the geometric structure of the basin-type insulator based on the simulation design model, analyzing the influence of different bending degrees of the basin-type insulator on electric field distribution and metal particle driving effects, and obtaining the optimal structure of the basin-type insulator with the optimal driving effect; and step four, optimizing the geometric structure of the grounding shell based on the optimal structure of the basin-type insulator, and arranging a sinking type particle catcher on the grounding shell.
2. 2. The method for designing the direct current GIL basin-type insulator particle catcher of claim 1, wherein in the first step, the simulation design model comprises a high-voltage conductor, a basin-type insulator and a grounding shell, wherein the high-voltage conductor and the grounding shell are made of aluminum materials, and the high-voltage conductor and the grounding shell are coaxially arranged.
3. 3. The method of designing a direct current GIL bowl insulator particle trap according to claim 2, wherein in the first step, the bowl insulator is made of an epoxy resin-alumina composite material.
4. 4. The method for designing the direct current GIL bowl-shaped insulator particle catcher according to claim 1, wherein the method comprises the following steps: in the third step, the metal particles are aluminum particles.
5. 5. The method of claim 1, wherein in the third step, the optimization method of the basin-type insulator geometry is a genetic algorithm.
6. 6. The method of designing a direct current GIL bowl-shaped insulator particle catcher according to claim 1, further comprising adding a metal particle motion model to the simulation design model, setting a metal particle release position and number, calculating a motion track of the metal particles within 1 second, and evaluating an optimization effect by calculating a metal particle driving rate.
7. 7. The method of designing a direct current GIL basin-type insulator particle catcher as claimed in claim 6, wherein the setting of the positions and the number of the metal particles comprises releasing one metal particle every 25mm from a position 40mm to 200mm away from the basin-type insulator near the basin-type insulator concave-convex surface grounding shell and the high voltage conductor, and releasing all the metal particles simultaneously.
8. 8. The method of designing a direct current GIL bowl-shaped insulator particle catcher according to claim 1, wherein in the fourth step, the sinking type particle catcher is made of aluminum material.
9. 9. A design system of a direct current GIL basin-type insulator particle catcher is characterized by comprising the following components: The simulation design model building module is used for building a direct-current GIL basin-type insulator simulation design model and setting related parameters; the analysis module is used for calculating the electric field distribution of the simulation design model and analyzing the metal particle driving performance of the simulation design model; The acquisition module is used for optimizing the geometric structure of the basin-type insulator based on the simulation design model, analyzing the influence of different bending degrees of the basin-type insulator on electric field distribution and metal particle driving effects, and acquiring the optimal structure of the basin-type insulator with the optimal driving effect; And the optimizing module is used for optimizing the geometric structure of the grounding shell based on the optimal structure of the basin-type insulator, and arranging a sinking type grain catcher on the grounding shell.
10. 10. A computer-readable storage medium, having stored thereon a computer program which, when executed by a processor, implements a method of designing a DC GIL basin-type insulator particle trap as set forth in any one of claims 1-8.

Description

Design method, system and medium of basin-type insulator particle catcher Technical Field The invention relates to the technical field of high-voltage equipment manufacturing, in particular to a design method, a system and a medium of a basin-type insulator particle catcher. Background The gas insulated power transmission line (Gas Insulated Transmission Line, GIL) is widely used for transmission of power in complex scenes due to its large power transmission capacity, strong environment adaptability and high stability. GIL inevitably generates metal particles due to friction, vibration, etc. during production, transportation, assembly, and operation. The metal particles freely move in the GIL cavity or are adhered to the surface of the insulator, so that discharge accidents can be caused, the insulating performance of equipment is damaged, and the stable and safe operation of a power system is endangered. In the direct current electric field, charged metal particles can penetrate through the high-voltage conductor once being started and move back and forth between the high-voltage conductor and the grounding shell, part of the particles can be attracted to the surface of the insulator, the creepage distance is shortened, and network faults are easy to occur. The existing metal particle inhibition measures mainly comprise particle traps, insulator/high-voltage conductor surface coating films, embedded electrodes and the like. However, the above methods still have some side effects or limitations. For example, the corresponding electric field distortion can be generated near the particle trap, particles still can escape after sinking, a coating layer can be damaged or fall off when the surface of the insulator/high-voltage conductor is coated, the final charge quantity of the metal particles is not influenced, and the embedded electrode can drive dangerous metal particles near the insulator but can not effectively inhibit the movement of the particles. Disclosure of Invention In order to overcome the defects in the prior art, the invention provides a design method, a system and a medium of a basin-type insulator particle catcher, which aim to cooperatively optimize the geometric structures of the basin-type insulator and the particle catcher through an artificial intelligence algorithm, namely, to obtain electric field distribution favorable for driving and collecting metal particles, and to obtain the shapes of the basin-type insulator and the particle catcher with particle driving effects by means of a genetic algorithm on the premise of meeting constraints such as the electric field intensity and mechanical stress of the basin-type insulator. The technical scheme adopted for solving the technical problems is that the design method of the direct current GIL basin-type insulator particle catcher comprises the following steps: Step one, establishing a DC GIL basin-type insulator simulation design model, and setting related parameters; Calculating electric field distribution of the simulation design model, and analyzing metal particle driving performance of the simulation design model; Optimizing the geometric structure of the basin-type insulator based on the simulation design model, analyzing the influence of different bending degrees of the basin-type insulator on electric field distribution and metal particle driving effects, and obtaining the optimal structure of the basin-type insulator with the optimal driving effect; and step four, optimizing the geometric structure of the grounding shell based on the optimal structure of the basin-type insulator, and arranging a sinking type particle catcher on the grounding shell. The distribution of the electric field is actively changed by optimizing the geometric structure of the basin-type insulator, so that the stress and the movement track of the metal particles are influenced at the source, the metal particles are easier to guide to a target area, and the control initiative and efficiency are improved. Through simulation design model and electric field distribution calculation, an electric field analysis basis is provided for structural optimization and particle catcher arrangement, and the metal particle driving effect can be evaluated more accurately, so that structural combinations with better performance are screened out, the reliability and pertinence of design are improved, and the scientificity and the accuracy of design are ensured. The grounded shell is optimized and the catcher is arranged based on the optimal structure of the basin-type insulator, so that design parameters of the particle catcher can be matched with the electric field environment after the basin-type insulator is optimized, the two are complementary and enhanced in function, and the collaborative optimization effect is improved. In the first step, the simulation design model comprises a high-voltage conductor, a basin-type insulator and a grounding shell. The interelectrode structur