單電源模式下的鋼鐵廠二期供電系統(tǒng)改進方案研究
任立新
(首鋼京唐鋼鐵聯(lián)合有限責任公司,河北 唐山 063200)
摘 要:某大型鋼鐵廠二期工程投產(chǎn),規(guī)模達到 1 500萬t/ 年的產(chǎn)能,需要有 2 個獨立 220 kV 電源點供電,而因之前受周邊網(wǎng)架薄弱情況的制約,只存在一個電源點。從電力平衡、潮流分布、短路水平、安全穩(wěn)定和投資金額等方面進行論述,并給出了鋼鐵廠擴建二期后與系統(tǒng)聯(lián)絡的 2 個方案,經(jīng)對提出的 2 個方案分析研究,決定采用方案 1,即保持現(xiàn)有內(nèi)部供電網(wǎng)絡與系統(tǒng)聯(lián)絡方案不變,等鋼鐵廠達到 2 000 萬t/ 年規(guī)模時,計劃新增一座 220 kV 變電站。
關(guān)鍵詞:鋼鐵廠;獨立電源;負荷;電力平衡;短路水平
中圖分類號:TM715 文獻標識碼:B 文章編號:1007-3175(2021)08-0049-04
Research and Discussion on Improvement Scheme of Phase II Power Supply
System in Iron and Steel Plant Based on Single Power Supply Mode
REN Li-xin
(Shougang Jingtang United Iron and Steel Joint Co., Ltd, Tangshan 063200, China)
Abstract: The second phase project of a large iron and steel plant was put into operation, and this plant has a capacity of 15 million tonsper year, requiring two independent 220 kV power supply points, but there was only one power supply point due to the weakness of the surrounding grid. After analyzing the points, like power balance, power flow distribution, short-circuit level, safety and stability, and investment,two schemes were proposed to solve the problem of the expansion of the iron and steel plant. After analyzing and studying the two proposed schemes, it was decided to adopt scheme 1, which is to keep the existing internal power supply network and system connection scheme unchanged,and plan to add a 220 kV substation when the steel plant reaches a scale of 20 million tons per year.
Key words: iron and steel plant; independent power supply; load; power balance; short-circuit level
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