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1.国网安徽省电力有限公司,安徽省合肥市 230061
2.清华大学电机工程与应用电子技术系,北京市 100084
邵庆祝(1988—),男,硕士,工程师,主要研究方向:电力系统继电保护。E-mail:shqzuser@163.com
崔鑫(1993—),男,通信作者,硕士研究生,主要研究方向:配电线路高阻接地故障诊断。E-mail:396590422@qq.com
谢民(1975—),男,高级工程师,主要研究方向:电力系统继电保护。E-mail:xiem261x@ah.sgcc.com.cn
收稿日期:2020-06-05,
修回日期:2020-11-18,
网络出版日期:2021-02-23,
纸质出版日期:2021-06-10
移动端阅览
邵庆祝,崔鑫,谢民等.弧光高阻接地故障建模及数据修正算法[J].电力系统自动化,2021,45(11):120-125.
SHAO Qingzhu,CUI Xin,XIE Min,et al.Modeling and Data Correction Algorithm for Arc High Resistance Grounding Fault[J].Automation of Electric Power Systems,2021,45(11):120-125.
邵庆祝,崔鑫,谢民等.弧光高阻接地故障建模及数据修正算法[J].电力系统自动化,2021,45(11):120-125. DOI: 10.7500/AEPS20200605005.
SHAO Qingzhu,CUI Xin,XIE Min,et al.Modeling and Data Correction Algorithm for Arc High Resistance Grounding Fault[J].Automation of Electric Power Systems,2021,45(11):120-125. DOI: 10.7500/AEPS20200605005.
配电网高阻接地故障通常伴随着非线性电弧的产生。传统的固定电阻模型无法模拟电弧的非线性;微分形式的电弧模型依赖于参数的迭代,难以直接应用于相关的故障检测及测距算法中;对数电弧模型较为复杂,按级数展开时易发散。人工模拟此类故障获取实验数据的方法成本高、危险性大且具有一定的局限性。基于汤逊原理,建立了能够表征动态电弧非线性特征的指数电弧模型及其简化模型,并结合PSCAD仿真软件及现场数据验证了模型的有效性。针对该电弧模型无法表征电弧电压、电流间相角差的不足,进一步提出了数据修正算法,为后续弧光高阻接故障的研究提供了更为精确的数据支撑。
High resistance grounding faults in distribution networks are usually accompanied by nonlinear arcs.The traditional fixed resistance model cannot simulate the nonlinearity of the arc. The arc model with differential form relies on the iteration of the parameters
which is difficult to be directly applied to the related fault detection and ranging algorithms. The logarithmic arc model is more complicated and tend to diverge when expanded in series. The method of artificially simulating such faults to obtain experimental data is costly
risky and has certain limitations. Based on the Thompson principle
an exponential arc model and the simplified model are established to describe the nonlinear characteristics of dynamic arcs. The validity of the model is verified by PSCAD and field data. Aiming at the deficiency that the arc model can not represent the phase angle difference between arc voltage and current
a data correction algorithm is proposed to provide more accurate data support for the follow-up research on arc high resistance grounding faults.
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