电力系统保护与控制
電力繫統保護與控製
전력계통보호여공제
POWER SYSTM PROTECTION AND CONTROL
2015年
14期
35-40
,共6页
互信息%B样条%支持向量机%谐波分离%多谐波源定位
互信息%B樣條%支持嚮量機%諧波分離%多諧波源定位
호신식%B양조%지지향량궤%해파분리%다해파원정위
mutual information%B-spline functions%Support Vector Machine (SVM)%harmonic separation%multiple harmonic sources localization
针对复杂配电网中缺少有效划分非线性负荷谐波污染责任和不能准确确定主谐波源位置的状况,提出了一种基于信息熵的多谐波源定位方法.通过支持向量机进行谐波分离,获得测量量的各次谐波数据.接着利用B样条法对测量数据进行概率密度估计,从而计算出母线电压与各支路电流的互信息值,根据互信息值的大小来确定主谐波源位置.通过对典型配电系统在 ATP(选择性暂态程序)软件中仿真分析,所提方法具有定位准确、能够进行实际谐波责任区分的优点.
針對複雜配電網中缺少有效劃分非線性負荷諧波汙染責任和不能準確確定主諧波源位置的狀況,提齣瞭一種基于信息熵的多諧波源定位方法.通過支持嚮量機進行諧波分離,穫得測量量的各次諧波數據.接著利用B樣條法對測量數據進行概率密度估計,從而計算齣母線電壓與各支路電流的互信息值,根據互信息值的大小來確定主諧波源位置.通過對典型配電繫統在 ATP(選擇性暫態程序)軟件中倣真分析,所提方法具有定位準確、能夠進行實際諧波責任區分的優點.
침대복잡배전망중결소유효화분비선성부하해파오염책임화불능준학학정주해파원위치적상황,제출료일충기우신식적적다해파원정위방법.통과지지향량궤진행해파분리,획득측량량적각차해파수거.접착이용B양조법대측량수거진행개솔밀도고계,종이계산출모선전압여각지로전류적호신식치,근거호신식치적대소래학정주해파원위치.통과대전형배전계통재 ATP(선택성잠태정서)연건중방진분석,소제방법구유정위준학、능구진행실제해파책임구분적우점.
As there is lack of effective division for liability of harmonic pollutions caused by non-linear loads and there is no accurate localization of harmonic sources in complex distribution network, the method based on information entropy for localization of multiple harmonic sources is proposed. All the harmonic data measured is gained by harmonic separation using support vector machine and then probability density is estimated by using the B-spline method, thus, the value of mutual information regarding bus bar voltage and current of each branch can be figured out and the position of main harmonic sources can be confirmed according to the value of mutual information. Through simulation analysis of typical power distribution system in alternative transient process (ATP) software, the result shows that the method proposed has the advantage of accurate location and is able to divide the real liability of harmonic pollutions.
