CAJ | 학술논문

针对±800 kV 特高压直流输电线路 V 型复合绝缘子串挂点伸入塔身后可能带来的各种技术问题，开展了±800 kV直流线路V型复合绝缘子串挂点伸入塔身后的电场计算及均压特性、塔头空气间隙冲击放电特性和带电作业分析研究。研究结果表明：V型复合绝缘子串悬挂点伸入塔身2.0 m范围内，各均压环和复合绝缘子串表面最大电场强度均满足场强控制要求，V型串伸入塔身的布置方式对塔头空气间隙的冲击放电特性影响不明显，带电作业人员进出高电场区域可选择从导线下方向上吊入高电位区的方式，即±800 kV特高压直流输电线路采用V型复合绝缘子串挂点伸入塔身的方案可行。研究成果为后续特高压直流线路的设计和建设提供了有力的技术支撑。
침대±800 kV 특고압직류수전선로 V 형복합절연자천괘점신입탑신후가능대래적각충기술문제，개전료±800 kV직류선로V형복합절연자천괘점신입탑신후적전장계산급균압특성、탑두공기간극충격방전특성화대전작업분석연구。연구결과표명：V형복합절연자천현괘점신입탑신2.0 m범위내，각균압배화복합절연자천표면최대전장강도균만족장강공제요구，V형천신입탑신적포치방식대탑두공기간극적충격방전특성영향불명현，대전작업인원진출고전장구역가선택종도선하방향상조입고전위구적방식，즉±800 kV특고압직류수전선로채용V형복합절연자천괘점신입탑신적방안가행。연구성과위후속특고압직류선로적설계화건설제공료유력적기술지탱。
If V-type composite insulator string extends to tower body for ±800 kV UHV DC lines, it will bring various technical problems. To solve these problems, this paper carried out the study of the electric field calculation and stress characteristics, impulse discharge characteristics of tower head air gaps and live working analysis. The research shows that, after V-type composite insulator string extends to tower body about 2.0 m, the maximum electric field strength of grading rings and composite insulators can meet the control requirements;the effect on impulse flashover characteristics of tower head air gaps is not obvious; live working operators in and out of the area of high electric field can choose hanging from polar conductors up to high electric field region. The proposal of V-type composite insulator string hanging point into the tower body for ±800 kV UHV DC transmission lines is feasible. The research results can provide relevant technical basis for subsequent UHVDC project design and construction.