电测与仪表2016，Vol.53Issue(24)：24-32,9.
励磁涌流引发的谐波过电压机理分析以及抑制措施研究
Research on mechanism of harmonic overvoltage due to exciting inrush current and its suppression method
魏巍 1向天堂 2丁理杰 1刘莹 3汤凡1
作者信息
- 1. 国网四川省电力公司电力科学研究院，成都610072
- 2. 国网四川省电力公司广安电力公司，四川广安638600
- 3. 国网四川省电力公司电力经济技术研究院，成都610041
- 折叠
摘要
Abstract
In this paper, the mechanism of harmonic overvoltage resulting from exciting inrush current is analyzed , and it is found that its essential reason is the combined action of standing-wave effect and the resonance effect on the transmission line.Moreover , the limitations of existing suppression methods , such as phase selection switch and closing resistor , are also analyzed.The phase selection switch requires the breaker switching time to be less than 1ms, which could be very difficult to achieve due to the discreteness of the breaker and the transformer residual magnetism in reality .On the other hand, if transformer residual magnetism is considered , the switching of the closing resistor can ’ t suppress the exciting currents of all phases because of its switching time .Therefore , under the condition that the direction of transformer residual magnetism is known , a coordinated suppression control strategy of over-voltage produced by exciting inrush current is proposed in this pa-per, which optimizes phase selection and closing resistor switching .Electromagnetic transient simulation was carried out on a certain regional power grid in Sichuan , and results indicate that the proposed suppression method is effective and has some robustness under different operating conditions .关键词
励磁涌流/选相合闸/合闸电阻/剩磁/协调策略/鲁棒性Key words
exciting inrush current/phase selection switch/closing resistor/transformer residual magnetism/coordi-nation strategy/robustness分类
信息技术与安全科学引用本文复制引用
魏巍,向天堂,丁理杰,刘莹,汤凡..励磁涌流引发的谐波过电压机理分析以及抑制措施研究[J].电测与仪表,2016,53(24):24-32,9.
