基于多物理场耦合的变压器真空缺陷诊断 及处理方法研究

Research on Diagnosis and Treatment Methods for Transformer Vacuum Defects Based on Multiphysics Coupling

摘要: 本文针对变压器安装过程中真空处理不足的隐蔽性危害，通过建立抽真空动力学模型与分子尺度水分扩散模拟，揭示真空缺陷形成机理。提出智能真空监测系统与多模态检测技术，提出分级治理策略及微波等离子体协同干燥工艺。基于工程案例验证，本文提出的智能真空监测系统和真空缺陷处理方法的有效性，实现变压器抽真空时泄漏率控制精度达0.05 kPa/h，运行时局部放电量降低93%，实现变压器的全寿命周期成本下降。研究成果为超高压变压器安装质量控制提供理论支撑与实践指南。

Abstract: This paper addresses the hidden hazards of insufficient vacuum treatment during transformer installation by establishing a vacuum dynamics model and molecular-scale moisture diffusion simulation to reveal the formation mechanisms of vacuum defects. An intelligent vacuum monitoring system and multimodal detection technology are proposed, along with a graded remediation strategy and a microwave-plasma synergistic drying process. Engineering case studies validate the effectiveness of the proposed intelligent monitoring system and defect remediation methods, achieving a vacuum leakage rate control precision of 0.05 kPa/h during evacuation, a 93% reduction in operational partial discharge levels, and a lifecycle cost reduction for transformers. The research outcomes provide theoretical support and practical guidelines for quality control in ultra-high-voltage transformer installation.