典型隔離開關(guān)與電流互感器的熱場(chǎng)分析
李佳1,張斌2
(1 中國電建集團(tuán)西北勘測(cè)設(shè)計(jì)研究院有限公司,陜西 西安 710065;2 國網(wǎng)浙江省電力公司寧波供電公司,浙江 寧波 315200)
摘 要:隔離開關(guān)與電流互感器是電力系統(tǒng)的重要設(shè)備,對(duì)其進(jìn)行熱場(chǎng)分析與計(jì)算對(duì)于確保系統(tǒng)增容運(yùn)行時(shí)的安全具有重要意義。針對(duì)典型隔離開關(guān)與電流互感器設(shè)備,應(yīng)用熱路模型法對(duì)其進(jìn)行熱場(chǎng)分析。模型包含穩(wěn)態(tài)熱場(chǎng)和動(dòng)態(tài)熱場(chǎng)兩部分,并在建模過程中考慮了環(huán)境因素的影響。通過校驗(yàn)發(fā)現(xiàn),模型計(jì)算結(jié)果與溫升試驗(yàn)中現(xiàn)場(chǎng)實(shí)測(cè)結(jié)果偏差不超過10%,說明建立的隔離開關(guān)熱路模型與電流互感器熱路模型具有較高的準(zhǔn)確性。
關(guān)鍵詞:隔離開關(guān);電流互感器;熱場(chǎng)分析;熱路模型;溫升試驗(yàn)
中圖分類號(hào):TM452;TM564.1 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):1007-3175(2017)10-0026-04
Thermal Field Analysis of Typical Disconnector and Current Transformer
LI Jia1, ZHANG Bin2
(1 Northwest Engineering Corporation Limited, Power Construction Corporation of China, Xi’an 710065, China;
2 State Grid Zhejiang Electric Power Company Ningbo Power Supply Company, Ningbo 315200, China)
Abstract: Disconnectors and current transformers are essential equipments in power system, so the thermal field analysis of these devices is crucial for the safety capacity-increase operation of power system. Aiming at the typical disconnectors and current transformers equipments, this paper applied the thermal circuit models to carry out thermal field analysis. The model included the steady thermal field and dynamic thermal field and the environmental factors were considered in the modeling process. Verification shows that the model calculation results and the experimental data meet well as the deviation is within 10%, which indicates that the establishing of thermal circuit models of disconnectors and current transformers have higher accuracy.
Key words: disconnector; current transformer; thermal field analysis; thermal circuit model; temperature-rising test
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