电子科技大学学报2011，Vol.40Issue(5)：720-725,6.DOI:10.3969/j.issn.1001-0548.2011.05.017
考虑单位长度参数变量的线路参数估计方法
Line Parameter Estimation Method with Per Unit Length Parameter Varibles
摘要
Abstract
Resistance, reactance, and susceptance are estimated as independent variables in the conventional methods of parameter estimation. However, because they have a great difference in value, their estimation errors are inconsistent, especially the errors of small impedance are usually very large. Based on the length and the line parameters per unit length, a new line parameter estimation model is proposed. In this new model, state variables are multi-period voltage amplitude and phase angle at two ends of the line, and parameter variables are the parameters per unit length and the length. Because of introducing the length as the public variables of resistance, reactance and susceptance, the influence of line parameters on power flow is highlighted, so the consistency of line parameter estimation error can be guaranteed, and large estimation error of small impedance which appears in conventional models can be voided in the new model. Besides, the chaos quantum immune algorithm is presented to solve the parameter estimation model. It has the advantages of global optimality and stability. The validity of the proposed model and algorithm is verified by the simulation test.关键词
混沌量子免疫算法/参数估计/单位长度参数/相量测量单元Key words
chaos quantum immune algorithm/ parameter estimation/ parameter per unit length/ phasor measurement unit分类
信息技术与安全科学引用本文复制引用
颜伟,项凤雏,卢建刚,余娟,赵霞..考虑单位长度参数变量的线路参数估计方法[J].电子科技大学学报,2011,40(5):720-725,6.基金项目
输配电装备及系统安全与新技术国家重点实验室自主研究项目(2007DA 10512710204) （2007DA 10512710204）
