电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
POWER SYSTM PROTECTION AND CONTROL
2014年
19期
74-80
,共7页
齐郑%张惠汐%饶志%李志%张首魁
齊鄭%張惠汐%饒誌%李誌%張首魁
제정%장혜석%요지%리지%장수괴
小电流接地系统%单相接地%暂态分量%极限学习机%多信息融合
小電流接地繫統%單相接地%暫態分量%極限學習機%多信息融閤
소전류접지계통%단상접지%잠태분량%겁한학습궤%다신식융합
small current neutral grounding system%single-phase-to-earth fault%transient component%extreme learning machine%multi-information fusion
对于小电流接地系统单相接地故障定位问题,现有方法单一,实际运行时准确性低,难以满足现场需要。提出一种基于极限学习机的多信息融合区段定位方法。故障发生后,终端对实时测得的零序暂态电流运用暂态能量法、小波法、首半波法提取特征向量上传给主站,输入到经训练后得到权重参数的极限学习机网络中,主站启动多信息融合定位算法并输出区段定位结果。该方法受接地位置、接地时刻、接地过渡电阻等因素的影响较小,对不同的单相接地情况适用性强,具有较高的区段定位鲁棒性。通过现场实际验证,证明了该定位方法的可行性。
對于小電流接地繫統單相接地故障定位問題,現有方法單一,實際運行時準確性低,難以滿足現場需要。提齣一種基于極限學習機的多信息融閤區段定位方法。故障髮生後,終耑對實時測得的零序暫態電流運用暫態能量法、小波法、首半波法提取特徵嚮量上傳給主站,輸入到經訓練後得到權重參數的極限學習機網絡中,主站啟動多信息融閤定位算法併輸齣區段定位結果。該方法受接地位置、接地時刻、接地過渡電阻等因素的影響較小,對不同的單相接地情況適用性彊,具有較高的區段定位魯棒性。通過現場實際驗證,證明瞭該定位方法的可行性。
대우소전류접지계통단상접지고장정위문제,현유방법단일,실제운행시준학성저,난이만족현장수요。제출일충기우겁한학습궤적다신식융합구단정위방법。고장발생후,종단대실시측득적령서잠태전류운용잠태능량법、소파법、수반파법제취특정향량상전급주참,수입도경훈련후득도권중삼수적겁한학습궤망락중,주참계동다신식융합정위산법병수출구단정위결과。해방법수접지위치、접지시각、접지과도전조등인소적영향교소,대불동적단상접지정황괄용성강,구유교고적구단정위로봉성。통과현장실제험증,증명료해정위방법적가행성。
Fault location methods for single-phase-to-earth in small current neutral grounding system are difficult to meet the needs of the site, which is too simple to have a high accuracy in actual run-time. This paper presents a fault location method of multi-information fusion based on extreme learning machine. For real-time measured zero-sequence transient current, the terminal uses transient energy method, wavelet method, and the first half-wave method to extract feature vector and uploads it to the host station; inputs to the extreme learning machine network which has the be-trained parameters. Host station restarts multi-information fusion fault location and output search result. The method is less affected by ground position, grounding moment, ground transition resistance and other factor, is applicable to different single-phase ground case, which has higher fault location robustness. The on-site experiments are carried out to prove the feasibility of the method.