一种基于非同步采样的双端测距方法
|
摘要
双端测距时线路参数随运行情况变化及双端数据不同步问题,对线路故障准确测距有明显的影响。在不忽略线路首末端电压电流相量幅值可能变化的情况下提出一种消除不同步角影响,利用非线性方程组准确求解线路参数的方法。先利用求解出的线路参数结合双端电气量数据求出非同步角;再利用准确求得的线路参数、非同步角,合理选择故障后双端电气量数据,由测距公式求解出故障距离。算例仿真显示该方法能较大程度提高测量精度。
The changes of line parameters with the operation situation and asynchrony of two-terminal data have considerable impact on two-terminal fault location.A method of accurately calculating the line parameters was proposed by using system of nonlinear equations without the impact of non-synchronous angle considering the possible changes of the phosphor amplitudes of the voltage and current at both ends of the line.Then,the obtained line parameters along with the electric quantity data of both terminals were used to calculate the non-synchronous angle.Finally,the acquired precise line parameters,non-synchronous angle and properly selected post-fault electric quantity data of both terminals were used to calculate the fault distance through a locating equation.The simulation results showed that the method could greatly improve the accuracy of the measurement.
The changes of line parameters with the operation situation and asynchrony of two-terminal data have considerable impact on two-terminal fault location.A method of accurately calculating the line parameters was proposed by using system of nonlinear equations without the impact of non-synchronous angle considering the possible changes of the phosphor amplitudes of the voltage and current at both ends of the line.Then,the obtained line parameters along with the electric quantity data of both terminals were used to calculate the non-synchronous angle.Finally,the acquired precise line parameters,non-synchronous angle and properly selected post-fault electric quantity data of both terminals were used to calculate the fault distance through a locating equation.The simulation results showed that the method could greatly improve the accuracy of the measurement.
引文
[1]张晓明,徐岩,王渝,等.一种基于参数检测的双端故障测距算法[J].电力系统保护与控制,2011,39(12):106-111.
[2]陈旭,朱永利,郭小红,等.基于相位特性的高压输电线路双端非同步故障测距算法[J].电力系统自动化,2015,39(22):152-157
[3]桂勋,刘志刚,韩旭东,等.基于高压输电线路电压沿线分布规律的故障双端测距算法[J].中国电机工程学报,2009,29(19):63-69.
[4]辛振涛,尚德基,尹项根.一种双端测距算法的伪根问题与改进[J].继电器,2005,33(6):36-38.
[5]束洪春,高峰,陈学允,等.双端不同步采用的高压输电线路[J].电工技术学报,1997,12(6):43-48.
[6]腾林,刘万顺,李营,等.一种实用的新型高压输电线路故障双端测距精度算法[J].电力系统自动化,2001,25(18):24-28.
[7]高厚磊,陈学伟,刘洪正,等.基于改进参数检测法的双端非同步数据故障测距算法[J].电力自动化设备,2014,34(9):27-32.
[8]潘雪,卢继平,乔梁,等.基于不同步两端采样数据的线路分布参数计算方法[J].电力电气,2011,30(21):38-41.
[9]张晓明.变电站事故分析系统的实现及测距新方法的研究[D].北京:华北电力大学,2010.
[2]陈旭,朱永利,郭小红,等.基于相位特性的高压输电线路双端非同步故障测距算法[J].电力系统自动化,2015,39(22):152-157
[3]桂勋,刘志刚,韩旭东,等.基于高压输电线路电压沿线分布规律的故障双端测距算法[J].中国电机工程学报,2009,29(19):63-69.
[4]辛振涛,尚德基,尹项根.一种双端测距算法的伪根问题与改进[J].继电器,2005,33(6):36-38.
[5]束洪春,高峰,陈学允,等.双端不同步采用的高压输电线路[J].电工技术学报,1997,12(6):43-48.
[6]腾林,刘万顺,李营,等.一种实用的新型高压输电线路故障双端测距精度算法[J].电力系统自动化,2001,25(18):24-28.
[7]高厚磊,陈学伟,刘洪正,等.基于改进参数检测法的双端非同步数据故障测距算法[J].电力自动化设备,2014,34(9):27-32.
[8]潘雪,卢继平,乔梁,等.基于不同步两端采样数据的线路分布参数计算方法[J].电力电气,2011,30(21):38-41.
[9]张晓明.变电站事故分析系统的实现及测距新方法的研究[D].北京:华北电力大学,2010.