摘要
在输电线路故障测距的研究中,由于线路参数可能变化或提供的参数不准确,以及其他不利因素的存在,对故障测距的精度会产生很大的影响。该文提出了一种基于分布参数模型和等效参数估计的双端测距算法,该算法只利用故障前的电压电流,在线估计出线路等效参数,对各种误差能够起到综合补偿的效果,从而提高了测距精度。EMTP仿真结果表明,该算法较之不带参数修正的算法测距精度有明显提高,具有很强的参数自适应能力和收敛能力。
In the research of transmission lines fault location, the varying line parameters, the proposed incorrect parameters or other bad factors will have much influences on the accuracy of fault location, This paper proposes a double ends algorithm based on the distributed parameters model and the equivalent parameter estimation, The algorithm, utilizing the voltages and currents before the fault, can estimate the variation of the line parameters on-line, In addition, it can compensate synthetically for all kinds of errors, in order to improve the accuracy of fault location, The results of EMTP simulation show that the algorithm has improved the location accuracy very much, compared with the algorithm that is not based on the parameter estimation, and the proposed algorithm has strong adaptability of parameter and convergence,
出处
《继电器》
CSCD
北大核心
2005年第17期7-10,共4页
Relay
关键词
故障测距
等效参数估计
分布参数模型
fault location
equivalent parameter estimation
distributed parameters model
