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題名 | 鹽霧污染對礙子絕緣特性之影響=Effect of Salt and Fog Pollutions on Insulation Characteristics of Insulators |
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作者 | 陳文序; 楊宏澤; 吳冠億; Chen, Wen-shiush; Yang, Hong Tzer; Wu, Kuan-je; |
期刊 | 中原學報 |
出版日期 | 20020300 |
卷期 | 30:1 2002.03[民91.03] |
頁次 | 頁119-125 |
分類號 | 448.39 |
語文 | chi |
關鍵詞 | 固體層法; 洩漏電流; 閃絡電壓; 等效鹽份附著密度; Solid layer methods; Leakage current; Flashover voltage; Equivalent salt deposit density; |
中文摘要 | 絕緣礙子主要功能係提供電力傳輸線與鐵塔間之電機絕緣與機械支撐。為能維持電力系統供電之品質與可靠性,絕緣礙子之絕緣性能扮演著十分重要的角色。然而因台灣地理環境四面鄰海,輸配電線路上絕緣礙子受到相當嚴重之鹽霧污染,因而極易導致絕緣礙子表面發生電壓閃絡現象。本文係探討鹽霧污染對懸垂礙于絕緣特性之影響,污染試驗方式是採用固體層法(SolidLayer Methods) ,以高嶺土(Kaolin)、食用鹽與蒸餾水混合作為人造污染源。分析結果顯示礙子在發生局部放電時其洩漏電流(LeakageCurrent) 之三級諧波值有顯著增加之現象。此外,絕緣礙于之表面洩漏電流及閃絡電壓(FlashoverVoltage)均與等效鹽份附著密度(Equivalent Salt Deposit Density, ESDD)有著相當密切之 關係;其中洩漏電流與等效鹽份附著密度係呈現指數遞增型式之變化,而閃絡電壓與等效鹽份附著密度卻是呈現指數遞減型式之變化關係。礙子在不同污染程度下,由監測洩漏電流可獲知礙子表面上之等效鹽份附著密度,進而可預測其閃絡電壓值。 |
英文摘要 | Insu1ators are used as e1ectrica1 insu1ation and mechanica1 support between power tower and transmission1ine. The insu1ators p1ays as an important ro1e of maintaining power qua1ity and re1iability of the power system. Due to Taiwan Is1and surrounded by sea, the insu1ators are usually polluted by salt and fog so serious1y as to 1ead to the voltage flashover. This paper aims at studying the effects of the salt and fog pollutions on insu1ation characteristics of the suspension insu1ators. Solid Layer methods are adopted as the pollution test, and the combinations of ka 01, sa1t and distilled water are used as the artificia1 po1- 1uted source. Experimenta1 resu1ts show that the third harmonic 1eakage current increases when the partia1 discharge occurs on the insu1ators. In addition, the 1eakage current and flashover voltage vary with the equiva1ent salt deposit density (ESDD). The 1eakage current increases exponentially with the ESDD and the flashover voltage decreases a1so exponentially with the ESDD. The 1eakage current can therefore, be monitored and used to obtain the corresponding ESDD va1ue and then the flashover voltage can be predicted by the ESDD. |
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