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(wú)功補(bǔ)償器SVC 來(lái)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(guò)系統(tǒng)仿真,對(duì)SVC 在拉薩燃機(jī)電廠開(kāi)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(wú)功補(bǔ)償器;輸電容量;系統(tǒng)穩(wěn)定
中圖分類(lèi)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
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