某110 kV變電站并聯(lián)電容器故障分析與對(duì)策研究
鞏曉璇,郭昆麗,吳媛,王一安
(西安工程大學(xué) 電子信息學(xué)院,陜西 西安 710048)
摘 要:針對(duì)某110 kV變電站10 kV母線安裝的并聯(lián)無(wú)功補(bǔ)償電容器組由于高次諧波的存在而頻繁損壞的問(wèn)題,分析了兩組串聯(lián)電抗率不同的并補(bǔ)裝置可能發(fā)生諧振的諧波次數(shù),并結(jié)合案例研究了電抗率的選取以避開(kāi)諧振點(diǎn),確保并補(bǔ)裝置安全運(yùn)行。應(yīng)用ETAP軟件進(jìn)行仿真,仿真結(jié)果表明濾波效果明顯,達(dá)到預(yù)期降低10 kV母線諧波含量的目標(biāo)。
關(guān)鍵詞:并聯(lián)電容器;諧波;無(wú)功補(bǔ)償;ETAP 軟件
中圖分類號(hào):TM531.4 文獻(xiàn)標(biāo)識(shí)碼:B 文章編號(hào):1007-3175(2018)04-0035-05
Fault Analysis and Countermeasure Research on Shunt Capacitor of 110 kV Substation
GONG Xiao-xuan, GUO Kun-li, WU Yuan, WANG Yi-an
(College of Electrics and Information, Xi’an Polytechnic University, Xi’an 710048, China)
Abstract: In allusion to the problem of frequently damaged shunt reactive power compensation capacitor group installed in the 10 kV bus of the 110 kV substation because of the existing of ultraharmonics, this paper analyzed the harmonic orders of possibly happened resonance in two groups of shunt reactive power compensation devices with different reactance rate in series and combined with cases to research on the selection of reactance rate to ensure the safe operation of shunt reactive power compensation devices. The simulation result based on ETAP software shows that there is obvious filtering effect, which reaches the goal to reduce the 10 kV bus harmonic content.
Key words: shunt capacitor; harmonic; reactive power compensation; ETAP software
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