Suzhou Electric Appliance Research Institute
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干式直流支撐電容器的絕緣電阻特性分析與試驗(yàn)測(cè)試

來源:電工電氣發(fā)布時(shí)間:2025-04-03 10:03瀏覽次數(shù):1

干式直流支撐電容器的絕緣電阻特性分析與試驗(yàn)測(cè)試

李印達(dá)1,2,孫曉武1,2,曹崇峰1
(1 無錫市電力濾波有限公司, 江蘇 無錫 214112;
2 晟容電力科技(安徽)有限公司, 安徽 銅陵 244000)
 
    摘 要:絕緣電阻會(huì)影響干式直流支撐電容器(DCLC)的均壓、儲(chǔ)能性能,故對(duì)高溫、高場(chǎng)強(qiáng)下 DCLC 的絕緣電阻特性分析具有重要意義。以工作場(chǎng)強(qiáng) E0 是 233.3 V/μm 時(shí)的 DCLC 為研究對(duì)象,分析 DCLC 的絕緣電阻和電導(dǎo)率,并搭建了相關(guān)試驗(yàn)平臺(tái),開展不同溫度和不同場(chǎng)強(qiáng)下的等效絕緣電阻測(cè)量試驗(yàn),分析 DCLC 的等效絕緣電阻影響因素。研究結(jié)果表明:DCLC 的等效絕緣電阻隨著工作場(chǎng)強(qiáng)增加而快速下降;DCLC 的等效絕緣電阻隨著溫度增加而下降。分析得出,影響 DCLC 的等效絕緣電阻關(guān)鍵因素為聚丙烯薄膜材料、金屬層的蒸鍍。
    關(guān)鍵詞: 干式直流支撐電容器;等效絕緣電阻;金屬化聚丙烯薄膜;自放電時(shí)間常數(shù)
    中圖分類號(hào):TM533+.3     文獻(xiàn)標(biāo)識(shí)碼:B     文章編號(hào):1007-3175(2025)03-0035-06
 
Analysis and Experimental Testing of Insulation Resistance
Characteristics of Dry DC Link Capacitor
 
LI Yin-da1,2, SUN Xiao-wu1,2, CAO Chong-feng1
(1 Wuxi Power Filter Co., Ltd, Wuxi 214112, China;
2 Sheng Rong Power Technology (Anhui) Co., Ltd, Tongling 244000, China)
 
    Abstract: Insulation resistance affects the voltage balancing and energy storage performance of dry DC link capacitor (DCLC), which is of great significance for the analysis of insulation resistance characteristics of DCLC at high temperature and high field strength. In this paper,taking a DCLC with the working field strength E0 of 233.3 V/μm as the research object, analyzing the insulation resistance and conductance of DCLC, and building the related test platform, based on this, the equivalent insulation resistance measurement tests were carried out at different temperatures and different field strengths to analyze the factors affecting the equivalent insulation resistance of DCLC. The results show that the equivalent insulation resistance of DCLC decreases rapidly with the increase of the working field strength, the equivalent insulation resistance of DCLC decreases with the increase of temperature. It is analyzed that the key factors affecting the equivalent insulation resistance of DCLC are polypropylene film material and the vaporization of the metal layer.
    Key words: dry DC link capacitor; equivalent insulation resistance; metallized polypropylene film; self-discharge time constant
 
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