一起換流站主時(shí)鐘系統(tǒng)時(shí)間異常影響分析
湯安琪，榮軍
（中國(guó)南方電網(wǎng)超高壓輸電公司柳州局，廣西 柳州 545026）
摘 要：針對(duì)一起換流站GPS 時(shí)間同步系統(tǒng)主時(shí)鐘異常告警事件，基于GPS 對(duì)時(shí)原理，現(xiàn)場(chǎng)利用整套備件重新搭建臨時(shí)試驗(yàn)系統(tǒng)，分析了主時(shí)鐘故障原因及其導(dǎo)致直流雙極閉鎖的風(fēng)險(xiǎn)，通過邏輯梳理及仿真試驗(yàn)，研究了兩站直流控制保護(hù)系統(tǒng)對(duì)時(shí)異常及各套直流控制保護(hù)系統(tǒng)對(duì)時(shí)異常對(duì)直流系統(tǒng)的影響，并提出相應(yīng)措施，確保變電站安全運(yùn)行。
關(guān)鍵詞：主時(shí)鐘系統(tǒng)；時(shí)間異常；影響分析；建議措施
中圖分類號(hào)：TM631 文獻(xiàn)標(biāo)識(shí)碼：B 文章編號(hào)：1007-3175(2017)11-0041-04
Time Abnormal Impact Analysis of a Case of Master Clock System in Convertor Station
TANG An-qi, RONG Jun
（Liuzhou Bureau, China Southern Power Grid EHV Power Transmission Company, Liuzhou 545026, China）
Abstract: In allusion to an abnormal master clock alarm event of global position system (GPS) time synchronization in the convertor station, based on the GPS timing principle, the interim trial system was constructed again with a complete set of replacement part on site. This paper analyzed the reason of the master clock fault and its generating risk of direct current (DC) bipolar block. Via logic analysis and simulation, this paper researched on the timing abnormity of two-station DC control and protection system and its impact on the DC system, and proposed the corresponding measures to guarantee the safe operation of transformer substation.
Key words: master clock system; clock fault; impact analysis; suggestions and measures
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