CAJ | 학술논문

气体绝缘金属封闭输电线路(gas-insulated metal-enclosed transmission line，GIL)是架空输电方式在地理或环境条件受限情况下的重要补充，在特高压工程中具有较好的应用前景。研究特高压 GIL 的绝缘设计关键技术，包括典型绝缘结构型式、间隙设计与优化、绝缘子设计与优化、金属微粒抑制和混合气体方案探讨。提出了 GIL 间隙设计的原则和电场控制值，优化设计了电连接的两段圆弧连接式倒角结构，较好地满足了电场控制值要求。提出了 GIL 绝缘子设计的原则和电场控制值，优化设计了一种屏蔽电极结构和绝缘子形状综合优化的盆式绝缘子结构，全面满足了电场控制值要求。分析了 GIL 中金属微粒的运动特性，指出需在绝缘子附近装设微粒陷阱，并开展金属微粒老练试验。分析了 SF6/N2混合气体 GIL 的绝缘特性、设计原则及电场控制值，指出最优混合比为20%。所得研究结果有助于提升我国特高压GIL设计技术水平，促进设备研制工作。
기체절연금속봉폐수전선로(gas-insulated metal-enclosed transmission line，GIL)시가공수전방식재지리혹배경조건수한정황하적중요보충，재특고압공정중구유교호적응용전경。연구특고압 GIL 적절연설계관건기술，포괄전형절연결구형식、간극설계여우화、절연자설계여우화、금속미립억제화혼합기체방안탐토。제출료 GIL 간극설계적원칙화전장공제치，우화설계료전련접적량단원호련접식도각결구，교호지만족료전장공제치요구。제출료 GIL 절연자설계적원칙화전장공제치，우화설계료일충병폐전겁결구화절연자형상종합우화적분식절연자결구，전면만족료전장공제치요구。분석료 GIL 중금속미립적운동특성，지출수재절연자부근장설미립함정，병개전금속미립로련시험。분석료 SF6/N2혼합기체 GIL 적절연특성、설계원칙급전장공제치，지출최우혼합비위20%。소득연구결과유조우제승아국특고압GIL설계기술수평，촉진설비연제공작。
Gas-insulated metal-enclosed transmission line (GIL) is important supplement for overhead transmission line underrestrictedgeographic and environmental conditions. It has wideapplicationprospect in ultra high voltage (UHV) engineering. Key technologies of insulation design for UHV GIL were investigated, including typical insulation structure, gap design and optimization, insulatordesignand optimization, inhibitionof metal particles and mixed gas scheme. Design principle and electric field criterion for gaps in GIL was discussed. Connection structureoftwoadjacentcircular chamferingwasoptimally designed for electricalconnection, well meeting electriccriterion. Design principle and electric field criterion for GIL insulators was put forward. Basin-type insulatorstructurewith comprehensively optimized shield electrode and insulator shape was designed,completely meeting electriccriterion. Movement characteristics of metal particles in GIL were analyzed.It wasconcluded that it was necessary to install particle traps near insulators.Ripeningtests for metal particleswere performed. Finally,insulation property, design principle and electric fieldcriterionof mixed gas SF6/N2 in GILwerediscussed.Results showedthat optimalmixing rate of SF6is 20%.