| 引用本文: | 司马文霞,郭飞,杨庆,刘凡.变电站铁磁谐振仿真分析及抑制措施研究[J].电力自动化设备,2007,27(6):22-26 |
| .Simulative analysis of substation ferroresonance and its suppression measures[J].Electric Power Automation Equipment,2007,27(6):22-26 |
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| 摘要: |
| 以某110kV变电站为原型,在考虑了母线零、正序参数和进出线路几何参数情况下,利用ATP-EMTP电磁暂态仿真软件,对该变电站35kV侧由于出线单相接地引起的母线电压互感器的谐振情况及电压互感器一次侧中性点经非线性电阻接地,电压互感器开口三角短时投入阻尼电阻等措施的消谐情况进行了仿真计算。对母线上装设中性点接地的三相电容器组,采用电容式电压互感器等消谐方式的有效性进行了探讨。对谐振产生的原因和各种消谐措施的原理和消谐效果进行了分析比较。结合仿真结果和系统参数分析得出:单相接地故障消失时刻对于能否激发系统谐振起着关键性作用;电压互感器开口三角短时接入阻尼电阻和电压互感器一次侧中性点经非线性电阻接地2种措施消谐效果较为理想;H.A.Peterson的试验结论不能作为判断系统是否产生谐振的确切参数标准。 |
| 关键词: 铁磁谐振,消谐措施,变电站模型 |
| DOI： |
| 分类号:TM86 |
| 基金项目:重庆市科委自然科学基金资助项目(3597)~~ |
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| Simulative analysis of substation ferroresonance and its suppression measures |
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SIMA Wen-xia GUO Fei YANG Qing LIU Fan
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| Abstract: |
| With the zero and positive sequence parameters of its busbar and the geometric parameters of its inlet and outlet considered,the busbar PT ferroresonance caused by outlet single-phase grounding at 35 kV side is simulated using ATP-EMTP for a 110 kV substation system.Its suppression measures are also simulated:the neutral point of PT primary windings is earthed with nonlinear resistor,a damping resistor is temporarily connected to PT broken delta winding.The validity of some other ferroresonance suppression measures are researched,such as connecting three phase capacitor group with grounding neutral point to busbar,applying capacitive PT.Reasons of ferroresonance are analyzed and principles and effects of different suppression measures are compared.Simulation results show that,the time when the single-phase grounding fault disappears is the key factor to excite substation ferroresonance;effects of connecting nonlinear resistance to PT neural point and connecting damping resistance to PT broken delta winding are better than those of other measures;results of H.A.Peterson test can not be used as the proper criterion for ferroresonance. |
| Key words: ferroresonance,suppression measures,substation model |
