CAJ | 학술논문

针对谐波源随机分布及非谐波源节点存在干扰电流的状况，提出基于改进稀疏表示法的谐波源定位。通过稀疏表示将最小二乘建立的谐波状态估计量测方程转化为线性优化问题，并对量测节点的选择进行调整，进而根据谐波注入电流估计结果判断谐波源的位置。在IEEE 123节点模型的基础上，将其与基于最小二乘法及稀疏表示法的谐波源定位进行对比。结果表明，所提出的方法具有定位准确、抗干扰能力强的优点。
침대해파원수궤분포급비해파원절점존재간우전류적상황，제출기우개진희소표시법적해파원정위。통과희소표시장최소이승건립적해파상태고계량측방정전화위선성우화문제，병대량측절점적선택진행조정，진이근거해파주입전류고계결과판단해파원적위치。재IEEE 123절점모형적기출상，장기여기우최소이승법급희소표시법적해파원정위진행대비。결과표명，소제출적방법구유정위준학、항간우능력강적우점。
In allusion to random distribution and existence of interference currents at non-harmonic source nodes, an improved sparse representation-based method to locate harmonic sources is proposed. Using sparse representation, the measurement equation for harmonic state estimation established by least square method (LSM) is turned into linear optimization problem and the selection of measuring nodes is adjusted, and then the positions of harmonic sources are judged according to estimation results of injected harmonic currents. Utilizing IEEE 123-bus system, the results of harmonic sources location obtained by the proposed method, the LSM-based method and the sparse representation-based method are compared. Comparison results show that the proposed method possesses the advantages of high positioning accuracy and strong ability of counter-interference.