電力變壓器感應(yīng)電壓試驗時容性無功功率的估算
郭振業(yè)1 , 白國興1 , 韓錦2
(1 常州博瑞電力自動化設(shè)備有限公司,江蘇 常州 213025; 2 常州西電變壓器有限責(zé)任公司,江蘇 常州 213002)
摘 要 :新版 GB/T 1094.3—2017《電力變壓器 第 3 部分 :絕緣水平、絕緣試驗及外絕緣空氣間隙》 標(biāo)準(zhǔn)相較 GB/T 1094.3—2003 版標(biāo)準(zhǔn),在感應(yīng)電壓試驗項目 ( 即 IVW 和 IVPD) 的規(guī)定上有很大的不同, 分析研究新標(biāo)準(zhǔn)要求的試驗時變壓器的容性無功功率,對于制造廠順利開展該試驗很有必要。根據(jù)變壓 器的繞組排列結(jié)構(gòu)以及感應(yīng)電壓試驗時各繞組的電位分布情況,建立了容性無功功率分析模型,并按功 率等于端口電壓乘入端電流的方法導(dǎo)出了 IVW 或 IVPD 試驗時的容性無功功率估算式,經(jīng)兩個試驗實例 驗證,證明了其具有較高的估算精度。
關(guān)鍵詞 : 電力變壓器 ;感應(yīng)電壓試驗 ;容性無功功率 ;功率估算
中圖分類號 :TM41 文獻(xiàn)標(biāo)識碼 :B 文章編號 :1007-3175(2025)11-0066-05
Estimation of Capacitive Reactive Power of Power Transformers in Induced Voltage Tests
GUO Zhen-ye1 , BAI Guo-xing1 , HAN Jin2
(1 NR Electric Power Electronics Co., Ltd, Changzhou 213025, China; 2 Changzhou XD Transformer Co., Ltd, Changzhou 213002, China)
Abstract: The new version of GB/ T 1094.3—2017 “Power Transformers - Part 3: Insulation Level, Dielectric Tests and Extemal Clearance in Air” standard has significant differences in the provisions of induced voltage test (i.e. IVW and IVPD) compared with the GB/ T 1094.3—2003 version. Analyzing and studying the capacitive reactive power of the transformer during the test as required by the new standard is crucial for manufactures to carry out the tests smoothly. Based on the winding arrangement structure of the transformer and the potential distribution of each winding during the induced voltage test, a capacitive reactive power analysis model was established. The capacitive reactive power estimation formula for IVW and IVPD tests was derived according to the method that power equals port voltage multiplied by input current. Verification through two test cases proves that the formula has high estimation accuracy.
Key words: power transformer; induced voltage test; capacitive reactive power; power estimation
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