一起500 kV油浸式變壓器冷控系統(tǒng)設(shè)計缺陷與改進(jìn)
馬凱,杜鵬,黃道均,高燃,束暢
(國網(wǎng)安徽省電力有限公司檢修分公司,安徽 合肥 230009)
摘 要:某新建500 kV變電站兩臺強(qiáng)迫油循環(huán)風(fēng)冷的主變采用基于可編程序控制器(PLC)控制的冷控系統(tǒng),在開展基建竣工時驗收發(fā)現(xiàn)兩臺主變的冷控系統(tǒng)存在嚴(yán)重的設(shè)計缺陷,無法確保主變安全可靠運(yùn)行。介紹了主變冷控系統(tǒng)的設(shè)計原則,對存在的設(shè)計缺陷進(jìn)行了闡述,提出了相應(yīng)的改進(jìn)措施,并分析其中暴露的問題,提出了完善主變冷控系統(tǒng)設(shè)計的建議。
關(guān)鍵詞:變壓器;冷控系統(tǒng);可編程序控制器;設(shè)計缺陷
中圖分類號:TM411 文獻(xiàn)標(biāo)識碼:A 文章編號:1007-3175(2019)03-0029-04
Design Defects and Improvements of a 500 kV Oil-Immersed Transformer Cooling Control System
MA Kai, DU Peng, HUANG Dao-jun, GAO Ran, SHU Chang
(State Grid Anhui Maintenrance Company, Hefei 230009, China)
Abstract: The PLC-based cold control system was adopted by two transformers of forced oil circulating air-cooling in a newly built 500 kV substation. When the infrastructure was completed, it was found that the cooling control system had serious design defects and could not guarantee the transformers safety and reliability. Introduction was made to the design philosophy of main transformer cooling control system. This paper expounded the existing design defects, proposed the corresponding improvement measures, analyzed the exposed problems and suggested completing the design of main transformer cooling control system.
Key words: transformer; cooling control system; PLC; design defect
參考文獻(xiàn)
[1] 唐洪. 冷控系統(tǒng)故障引起變壓器跳閘事故原因分析及預(yù)防[J]. 安徽電力,2004(1):55-58.
[2] 羅明才,高峰.500 kV變壓器冷卻系統(tǒng)控制回路缺陷及處理[J]. 四川電力技術(shù),2001(1):42-44.
[3] 張茂春. 變壓器冷卻器控制回路的改造[J]. 電工技術(shù),2010(3):53-54.
[4] 黃文.500 kV洪溝1號主變冷控系統(tǒng)二次回路分析[J]. 四川電力技術(shù),2002(6):47-49.
[5] 陳書敏,石玉美. 變壓器及其冷卻方式簡介[J]. 變壓器,2010,47(4):50-53.
[6] 鄒建明,蔡漢生.500 kV變壓器的冷卻方式[J]. 華中電力,2005,18(1):31-33.
[7] 石磊,李建. 變壓器PLC冷控系統(tǒng)智能化應(yīng)用[J].供用電,2013,30(1):43-47.
[8] 章偉國,顧冰,顧克拉. 基于PLC的風(fēng)冷控制系統(tǒng)在大型變壓器上的應(yīng)用[J]. 浙江電力,2010,29(3):19-21.
[9] 林國松,陳川,劉輝樂,等. 基于PLC的500 kV主變冷卻系統(tǒng)在不停電狀態(tài)下的智能化改造[J]. 變壓器,2012,49(7):50-54.
[10] 陳玉國,疏月霞,邢白靜,等. 基于PLC實現(xiàn)變壓器多臺風(fēng)機(jī)排序啟動的設(shè)計[J]. 變壓器,2010,47(11):50-52.
[11] 田茂琴,梁中華,胡慶,等. PLC在油浸式變壓器風(fēng)冷系統(tǒng)中的應(yīng)用[J]. 沈陽工業(yè)大學(xué)學(xué)報,2003,25(5):401-403.