CAJ | 학술논문

准确评估公共连接点处的背景谐波电压和等效谐波阻抗是研究谐波责任分摊问题的前提。为准确评估背景谐波电压波动情况下受关注谐波源分摊的谐波责任，文中研究应用了部分线性核估计方法。为求解背景谐波电压，将背景谐波电压在受关注时段内的某一时刻按照泰勒级数展开，并把高阶项看做误差项，为保证求解的准确性，选取的目标函数在误差平方和最小的基础上考虑了展开时刻的有效邻域范围和各误差项所占权重不同对估计的影响，并利用窗宽参数控制展开时刻的邻域范围和对应误差项所占权重的大小。利用 IEEE 14节点系统进行了仿真验证，并将计算结果与两种线性方法进行了比较，证明了该方法的有效性。
준학평고공공련접점처적배경해파전압화등효해파조항시연구해파책임분탄문제적전제。위준학평고배경해파전압파동정황하수관주해파원분탄적해파책임，문중연구응용료부분선성핵고계방법。위구해배경해파전압，장배경해파전압재수관주시단내적모일시각안조태륵급수전개，병파고계항간주오차항，위보증구해적준학성，선취적목표함수재오차평방화최소적기출상고필료전개시각적유효린역범위화각오차항소점권중불동대고계적영향，병이용창관삼수공제전개시각적린역범위화대응오차항소점권중적대소。이용 IEEE 14절점계통진행료방진험증，병장계산결과여량충선성방법진행료비교，증명료해방법적유효성。
Estimating background harmonic voltage and equivalent harmonic impedance at the point of common coupling(PCC) is the premise of studying harmonic contribution determination.For the purpose of accurately assessing harmonic contributions of the harmonic source of concern in the case of background harmonic voltage fluctuations,the kernel estimation with the partial linear method is researched and applied.To calculate the background harmonic voltage,it is expanded in accordance with Taylor series at a certain moment in the time interval of concern.And the higher-order term is regarded as an error term. To ensure the accuracy of calculation,on the basis of the least sum of square errors,the objective function considers the effective neighborhood of the moment and the influence of different error terms for different weights and uses the bandwidth to control the range of neighborhood and the size of weight.A case study based on an IEEE 14-bus test system is conducted to show that the method is more effective in comparison with two linear methods.