HSGS下裝設(shè)限流電阻的可行性研究
陳俊宇
(中國(guó)南方電網(wǎng)有限責(zé)任公司超高壓輸電公司廣州局,廣東 廣州 510663)
摘 要:作為單極金屬回線鉗位點(diǎn)的換流站在運(yùn)行過(guò)程中會(huì)出現(xiàn)站內(nèi)地網(wǎng)分流的問(wèn)題,對(duì)換流站內(nèi)設(shè)備及人身安全產(chǎn)生影響。提出了采用高速接地開關(guān) (HSGS) 下裝設(shè)限流電阻的改造方案。對(duì)該方案在換流站實(shí)際運(yùn)行中的應(yīng)用可行性展開了研究。介紹了 HSGS 下裝設(shè)限流電阻方案的限流原理,從理論上分析了該方案實(shí)施的可行性;在 PSCAD 軟件中對(duì)該方案進(jìn)行了部分故障狀況的仿真分析,進(jìn)一步驗(yàn)證該方案的可行性;經(jīng)過(guò)現(xiàn)場(chǎng)實(shí)際調(diào)試,數(shù)據(jù)分析結(jié)果表明,該方案可在解決換流站地網(wǎng)分流問(wèn)題的同時(shí)滿足直流運(yùn)行轉(zhuǎn)換的需要。
關(guān)鍵詞: 高速接地開關(guān);共用接地極;分流;限流電阻器;仿真;調(diào)試
中圖分類號(hào):TM54 ;TM564 文獻(xiàn)標(biāo)識(shí)碼:A 文章編號(hào):1007-3175(2022)05-0025-04
Feasibility Study on the Current-Limiting Resistor Installed Under HSGS
CHEN Jun-yu
(EHV Power Transmission Company Guangzhou Bureau of China Southern Power Grid Co., Ltd, Guangzhou 510663, China)
Abstract: The grounding grid shunting problem emerged during the operation of the converter station of the clamping point of the unipolar metal return line. This problem could impact the equipment and the personal safety of the operator. This paper proposed the modification scheme to install a current-limiting resistor under the high-speed grounding switches(HSGS). Moreover, it studied the application of the scheme in the converter station. Furthermore, this study introduced the principle behind this modification scheme and analyzed its feasibility.It carried out a further simulation analysis of some fault conditions of the scheme in PSCAD to verify the feasibility. The data analysis results show that this scheme could meet the needs of DC operation while solving the shunting problem.
Key words: high-speed grounding switch; common grounding electrode; shunting; current-limiting resistor; simulation; debugging
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