电力系统保护与控制2009，Vol.37Issue(13)：24-28,5.
基于MODELS的工频弧光接地过电压的仿真
Simulation of PF arc grounding over-voltage based on MODELS
金恩淑 1杨明芳 1李卫刚 2陈韬1
作者信息
- 1. 东北电力大学电气工程学院,吉林,吉林,132012
- 2. 吉林省电力有限公司通化供电公司,吉林,通化,134001
- 折叠
摘要
Abstract
The arc grounding voltage is one of the worst over-voltages in the non-ground neutral system. At present, system simulation is the main method about the study on the arc grounding over-voltage. Based on the power frequency (PF) arc blowout theory, arc quenching and rekindles are simulated by controlling the switch on or off to observe the situation of arc grounding over-voltage. MATLAB power system simulation toolbox and electromagnetic transient simulation software EMTP is mainly used as the simulation tool. There is a common characteristic when using the two softwares to simulate arc quenching and rekindles, the moment of switch opening and closing is set according to one power frequency period. As a matter of fact, the arc is not sure to extinguish at the moment of PF current passing zero, the arc is also not sure to rekindle at the fault phase coming to the maximum recovery voltage because of intense statistics property of arc occurring. For this reason, the simulation model based on the theory of power frequency arc-blowout theory is not accurate. In such a case, based on the intensive study on mechanism of production of arc grounding voltage, a new method is proposed in this paper. Transient analysis of control system TACS module and MODELS module of EMTP is employed to dispose of the controlling section. The controlling program is compiled by the special language of MODELS module. The output signal of MODELS module is as the input controlling signal of TACS switch. When the voltage and current meet the threshold value, the switch will be on or off correspondingly. It is not necessary to set the opening or closing time according to a power frequency cycle, simple and flexible, improving the accuracy of simulation model. When it is applied to the arc grounding over-voltage study in 10 kV non-ground neutral system and system grounded by small resistance, a good expected result is got, having a better prospect.关键词
弧光接地过电压/中性点不接地/小电阻接地/TACS/MODELSKey words
arc grounding over-voltage/non-ground neutral system/small resistance/TACS/MODELS分类
信息技术与安全科学引用本文复制引用
金恩淑,杨明芳,李卫刚,陈韬..基于MODELS的工频弧光接地过电压的仿真[J].电力系统保护与控制,2009,37(13):24-28,5.
