CAJ | 학술논문

为准确、快速地估计变压器分接头位置,提出了基于改进递推贝叶斯估计的变压器分接头估计方法。该方法首先形成分接头位置可疑的变压器集合,然后计算可疑变压器在不同分接头位置下的状态估计残差,在此基础上,采用递推贝叶斯估计方法对分接头位置进行后验概率的递推估计。为提高计算效率,对基本的递推贝叶斯估计方法提出以下改进方案：采用线性残差修正方法或预测校正算法以有效减小每次递推时的残差计算量;在递推过程中逐次缩减估计范围;提出递推终止判据,以有效减少递推次数。在IEEE 39节点系统上的仿真计算表明,所提出的算法能准确、可靠地估计出正确分接头的位置,并显著提高递推贝叶斯估计的计算效率,具有较好的在线应用前景。
위준학、쾌속지고계변압기분접두위치,제출료기우개진체추패협사고계적변압기분접두고계방법。해방법수선형성분접두위치가의적변압기집합,연후계산가의변압기재불동분접두위치하적상태고계잔차,재차기출상,채용체추패협사고계방법대분접두위치진행후험개솔적체추고계。위제고계산효솔,대기본적체추패협사고계방법제출이하개진방안：채용선성잔차수정방법혹예측교정산법이유효감소매차체추시적잔차계산량;재체추과정중축차축감고계범위;제출체추종지판거,이유효감소체추차수。재IEEE 39절점계통상적방진계산표명,소제출적산법능준학、가고지고계출정학분접두적위치,병현저제고체추패협사고계적계산효솔,구유교호적재선응용전경。
An improved recursive Bayesian estimation approach with high efficiency and accuracy is proposed for the estimation of transformer tap positions.Transformers with suspect tap positions are identified firstly,then state estimation residuals for each tap position of the suspicious transformer are calculated.The posterior probability of all tap positions can be obtained with recursive Bayesian estimation approach.Furthermore,the computational efficiency are improved from the following aspects:a linear correction method and a prediction-correction method are proposed to estimate the residuals effectively;a heuristic method is given to reduce the set including the right tap position during the recursive process;and a stopping criterion for the recursive process is presented to avoid unnecessary estimation time.Simulations are carried on the IEEE 39-bus system to illustrate that the approach is reliable and with high efficiency,and thus has the good prospect of online applications.