城網(wǎng)220 kV長電纜對系統(tǒng)無功電壓控制的影響研究
樂曉蓉
(江蘇省電力設計院,江蘇 南京 210002)
摘 要:城市220 kV 長電纜的大量應用造成電網(wǎng)無功電源容量過剩,導致系統(tǒng)電壓過高,分析了高壓電纜對電網(wǎng)產(chǎn)生的無功電壓問題及系統(tǒng)無功電壓調節(jié)方法,結合具體案例提出在附近變電站加裝感性無功補償裝置、減少無功電源出力等措施來補償電纜增加的充電功率,實際應用表明,該措施可對電網(wǎng)無功電壓問題起到很好的治理效果,保障了電網(wǎng)安全穩(wěn)定運行。
關鍵詞:高壓長電纜;無功補償;電壓調節(jié);低壓關聯(lián)電抗器
中圖分類號:TM726.3;TM714.3 文獻標識碼:A 文章編號: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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