南方电网技术
南方電網技術
남방전망기술
SOUTHERN POWER SYSTEM TECHNOLOGY
2015年
1期
94-98
,共5页
谢国财%胡亚平%周华锋%赵旋宇%梁永新%刘皓明
謝國財%鬍亞平%週華鋒%趙鏇宇%樑永新%劉皓明
사국재%호아평%주화봉%조선우%량영신%류호명
状态估计%参数错误%可疑支路%相关度指标%基础数据
狀態估計%參數錯誤%可疑支路%相關度指標%基礎數據
상태고계%삼수착오%가의지로%상관도지표%기출수거
state estimation%parameter error%suspicious branch%relevant index%basic data
电网参数错误将影响电力系统状态估计的质量，并降低能量管理系统中其他高级应用软件的实用化程度。当存在多个遥测坏数据和参数错误时，如何保证状态估计结果的有效性非常重要。提出了一种电网可疑参数诊断方法，将参数错误和量测错误在信息空间统一建模，根据加权最小二乘方法计算各量测量的百分比残差并通过阈值比较获得可疑测点集合；计算各可疑测点以及可疑支路的相关度指标，针对各可疑支路逐一采用牛顿下山法求解可疑参数的最优估计，并更新参数集。算例仿真结果表明，该方法能够综合考虑网络参数错误和量测数据错误，并且能够适用于多个错误参数并存的情况，有效地提升了参数辨识与诊断的准确度，对于提高电网运行基础数据的质量与电网高级应用的实用化程度发挥了重要作用。
電網參數錯誤將影響電力繫統狀態估計的質量，併降低能量管理繫統中其他高級應用軟件的實用化程度。噹存在多箇遙測壞數據和參數錯誤時，如何保證狀態估計結果的有效性非常重要。提齣瞭一種電網可疑參數診斷方法，將參數錯誤和量測錯誤在信息空間統一建模，根據加權最小二乘方法計算各量測量的百分比殘差併通過閾值比較穫得可疑測點集閤；計算各可疑測點以及可疑支路的相關度指標，針對各可疑支路逐一採用牛頓下山法求解可疑參數的最優估計，併更新參數集。算例倣真結果錶明，該方法能夠綜閤攷慮網絡參數錯誤和量測數據錯誤，併且能夠適用于多箇錯誤參數併存的情況，有效地提升瞭參數辨識與診斷的準確度，對于提高電網運行基礎數據的質量與電網高級應用的實用化程度髮揮瞭重要作用。
전망삼수착오장영향전력계통상태고계적질량，병강저능량관리계통중기타고급응용연건적실용화정도。당존재다개요측배수거화삼수착오시，여하보증상태고계결과적유효성비상중요。제출료일충전망가의삼수진단방법，장삼수착오화량측착오재신식공간통일건모，근거가권최소이승방법계산각량측량적백분비잔차병통과역치비교획득가의측점집합；계산각가의측점이급가의지로적상관도지표，침대각가의지로축일채용우돈하산법구해가의삼수적최우고계，병경신삼수집。산례방진결과표명，해방법능구종합고필망락삼수착오화량측수거착오，병차능구괄용우다개착오삼수병존적정황，유효지제승료삼수변식여진단적준학도，대우제고전망운행기출수거적질량여전망고급응용적실용화정도발휘료중요작용。
The quality of the power system state estimation and the practical level of advanced power application softwares would be reduced by the wrong parameter. It is very important to ensure the effectiveness of results of the state estimation when multi bad remote sensing data and parameter errors exist . A diagnosis method for the doubtful parameters of the power grid is proposed. The parameter errors and measurement errors are uniformly modeled in the information space. The measured percentage residuals are calculated ac-cording to the weighted least square method, and the suspicious measuring point set is obtained by comparison with the threshold. The relevant indexes of all suspicious measuring points and branches are calculated, then Newton Downhill Method is introduced to deter-mine the optimal estimation of each suspicious parameter according to all suspicious branches, and the corrected parameters are regar-ded as the returned values. Simulation results show that the network parameter errors and measurement data errors can comprehensively be considered through the proposed method, which can also be applied to the situation where there exist multi error parameters simulta-neously, and the accuracy of the parameter identification and diagnosis is effectively improved, and the quality of basic operating data and the practical level of advanced applications of the power grid are improved.
