山西电力
山西電力
산서전력
SHANXI ELECTRIC POWER
2013年
1期
31-33
,共3页
变电站%一次系统%负相序%保护装置
變電站%一次繫統%負相序%保護裝置
변전참%일차계통%부상서%보호장치
substation%primary system%negative sequence%protection device
阐述了在目前运行的变电站中,有部分110 kV、35 kV农网变电站一次系统运行方式为负相序,随之二次系统也在负相序状态下运行.根据负相序是否影响保护装置的正常工作,从主变差动保护、复合电压闭锁过流保护、零序方向保护、距离保护、过流保护五个方面分析了负相序对保护装置的影响,并提出了改进建议.
闡述瞭在目前運行的變電站中,有部分110 kV、35 kV農網變電站一次繫統運行方式為負相序,隨之二次繫統也在負相序狀態下運行.根據負相序是否影響保護裝置的正常工作,從主變差動保護、複閤電壓閉鎖過流保護、零序方嚮保護、距離保護、過流保護五箇方麵分析瞭負相序對保護裝置的影響,併提齣瞭改進建議.
천술료재목전운행적변전참중,유부분110 kV、35 kV농망변전참일차계통운행방식위부상서,수지이차계통야재부상서상태하운행.근거부상서시부영향보호장치적정상공작,종주변차동보호、복합전압폐쇄과류보호、령서방향보호、거리보호、과류보호오개방면분석료부상서대보호장치적영향,병제출료개진건의.
In the presently operating substations, the primary system of some 110 kV and 35 kV rural substations runs in negative sequence;consequently,their secondary system runs in negative sequence,too. This article analyzes the effect of negative sequence on the protection device and proposes its improvement suggestions,according to whether negative sequence prevents the normal function of the protection device,from the five aspects of differential protection of main transformer,compound voltage overcurrent latch-up protection,zero-sequence directional protection,distance protection and overcurrent protection.
