城網(wǎng)220 kV長(zhǎng)電纜對(duì)系統(tǒng)無(wú)功電壓控制的影響研究
樂(lè)曉蓉
(江蘇省電力設(shè)計(jì)院,江蘇 南京 210002)
摘 要:城市220 kV 長(zhǎng)電纜的大量應(yīng)用造成電網(wǎng)無(wú)功電源容量過(guò)剩,導(dǎo)致系統(tǒng)電壓過(guò)高,分析了高壓電纜對(duì)電網(wǎng)產(chǎn)生的無(wú)功電壓?jiǎn)栴}及系統(tǒng)無(wú)功電壓調(diào)節(jié)方法,結(jié)合具體案例提出在附近變電站加裝感性無(wú)功補(bǔ)償裝置、減少無(wú)功電源出力等措施來(lái)補(bǔ)償電纜增加的充電功率,實(shí)際應(yīng)用表明,該措施可對(duì)電網(wǎng)無(wú)功電壓?jiǎn)栴}起到很好的治理效果,保障了電網(wǎng)安全穩(wěn)定運(yùn)行。
關(guān)鍵詞:高壓長(zhǎng)電纜;無(wú)功補(bǔ)償;電壓調(diào)節(jié);低壓關(guān)聯(lián)電抗器
中圖分類號(hào):TM726.3;TM714.3 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):1007-3175(2016)05-0033-03
Study on Influence of 220 kV Long Cables on Reactive Power Voltage Control in Urban Power Grid
LE Xiao-rong
(Jiangsu Electric Power Design Institute, Nanjing 210002, China)
Abstract: Application of 220 kV long cables in quantities leads to surplus reactive generation capacity in grid and overhigh system voltage. This paper analyzed the reactive voltage problem from high voltage cables and system reactive voltage adjustment method. Combined with a concrete case, this paper proposed to install inductive reactive power compensation device and to reduce reactive power supply contribution to compensate battery charging power. The practical application shows that this measure has good governance effect for the problem of reactive voltage in grid, to guarantee grid safe and stable operation.
Key words: high-voltage long cables; reactive power compensation; voltage control; low-voltage shunt reactor
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