混合型SVC在藏中電網(wǎng)中的應(yīng)用
尹大千,吳怡敏,李龍才
西南電力設(shè)計(jì)院有限公司,四川 成都 610021
摘 要:針對(duì)青藏直流投產(chǎn)初期輸電容量較低和藏中電網(wǎng)存在電壓和頻率失穩(wěn)風(fēng)險(xiǎn)的現(xiàn)狀,提出在藏中電網(wǎng)裝設(shè)靜止無功補(bǔ)償器SVC 來提高青藏直流輸電能力和抑制系統(tǒng)故障時(shí)電壓和頻率的波動(dòng)。對(duì)SVC 的配置容量、電壓等級(jí)進(jìn)行了論證,提出適合工程且較省費(fèi)用的SVC 配置方案。通過系統(tǒng)仿真,對(duì)SVC 在拉薩燃機(jī)電廠開機(jī)和停運(yùn)時(shí)的運(yùn)行特性進(jìn)行了分析。結(jié)果表明,提出的SVC 配置方案可增強(qiáng)系統(tǒng)故障時(shí)的穩(wěn)定性,能明顯提高青藏直流的輸送容量。
關(guān)鍵詞:藏中電網(wǎng);靜止無功補(bǔ)償器;輸電容量;系統(tǒng)穩(wěn)定
中圖分類號(hào):TM714.3 文獻(xiàn)標(biāo)識(shí)碼:B 文章編號(hào):1007-3175(2015)12-0036-04
Application of Hybrid Static Var Compensator in Central Tibet Power Grid
YIN Da-qian, WU Yi-min, LI Long-cai
Southwest Electric Power Design Institute Co., Ltd, Chengdu 610021, China
Abstract: In view of lower transmission capacity of Qinghai-Tibet direct current (DC) initial stage of production and the current situation of unstable risk of voltage and frequency existing in central Tibet power grid, the static var compensator (SVC) was proposed to install in central Tibet power grid to improve the transmission capacity in Qinghai-Tibet HVDC project and to inhibit the fluctuation of voltage and frequency effectively in power system faults. The capacity configuration and voltage level of SVC were demonstrated and a configuration scheme suitable for the project with low cost was proposed. This paper analyzed the operation characteristics of SVC in the operation and outage of Lhasa oil-fired power plant by system simulation. The results indicate that the configuration scheme of SVC can enhance the stability of system in faults and improve the transmission capacity of Qinghai-Tibet HVDC project obviously.
Key words: central Tibet power grid; static var compensator; transmission capacity; system stability
參考文獻(xiàn)
[1] 何志強(qiáng),吳安平,高萬良,等. 西藏中部電網(wǎng)高一級(jí)電壓等級(jí)論證[J]. 電力建設(shè),2009,30(12):25-27.
[2] 劉瑞豐,陳天恩,張浩,等. 青藏聯(lián)網(wǎng)后電力交易有關(guān)問題探討[J].電網(wǎng)與清潔能源,2011,27(12):53-56.
[3] 賈俊川,趙兵,羅煦之,等. 青藏直流投運(yùn)后藏中電網(wǎng)穩(wěn)定特性研究[J].電力系統(tǒng)保護(hù)與控制,2014,42(6):104-109.
[4] 吳沖,劉漢偉,董衛(wèi)國(guó),等. 青藏直流聯(lián)網(wǎng)后藏中電網(wǎng)安全穩(wěn)定控制系統(tǒng)的重構(gòu)[J].電網(wǎng)與清潔能源,2013,29(1):54-57.
[5] 何志強(qiáng). 西藏中部電網(wǎng)220 kV網(wǎng)架輸變電工程可行性研究報(bào)告[R]. 成都:西南電力設(shè)計(jì)院,2012.
[6] 金立軍,安世超,廖黎明,等. 國(guó)內(nèi)外無功補(bǔ)償研發(fā)現(xiàn)狀與發(fā)展趨勢(shì)[J]. 高壓電器,2008,44(5):463-465.
[7] 朱岸明,王敏,焦熠琨,等. 大容量SVC 在750 kV電網(wǎng)中的應(yīng)用[J]. 電網(wǎng)與清潔能源,2013,29(5):9-12.