一种基于极值法与相位法的新型消弧线圈研究
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摘要
分析了消弧线圈的各种调谐原理,提出了采用极值法与相位法相结合的消弧线圈调谐来实现快速调谐。根据三相五柱式消弧线圈的工作原理,提出调节多组可控硅导通角获得补偿电感电流的控制方法,也提出了准确判断系统电容电流变化的判据以及在母联断开和闭合时采用CAN总线进行双机互联实现准确调谐的手段。
Based on summarizing the research results by predecessors,advantages and disadvantages of different modes of neutral point grounding and some adjustable inductances have been analyzed systematically in the paper,the high-order harmonic induced and reduced is also presented in this paper too. On the base of this,enlarging out-of-resonance degree and neutral grounded by ASC parallel resistance are adopted in control scheme in this paper instead of tuning to full compensation before ground fault in traditional power network. Based on the working principle of three phases and five columns,a new control method was put forward which is adjust some thyristor trigger angle to achieve the compensating current. The criterion to judge the real change of the capacitance current and the technique of using CAN bus to carry out two controller working together to realize accurate tuning during the bus-tie switch operating are also proposed.
Based on summarizing the research results by predecessors,advantages and disadvantages of different modes of neutral point grounding and some adjustable inductances have been analyzed systematically in the paper,the high-order harmonic induced and reduced is also presented in this paper too. On the base of this,enlarging out-of-resonance degree and neutral grounded by ASC parallel resistance are adopted in control scheme in this paper instead of tuning to full compensation before ground fault in traditional power network. Based on the working principle of three phases and five columns,a new control method was put forward which is adjust some thyristor trigger angle to achieve the compensating current. The criterion to judge the real change of the capacitance current and the technique of using CAN bus to carry out two controller working together to realize accurate tuning during the bus-tie switch operating are also proposed.
引文
[1]王崇林.中性点接地方式与消弧线圈[M].徐州:中国矿业大学出版社,1999.
[2]王崇林,等.可控硅控制三相五柱式消弧线圈的工作原理及波形分析[J].煤炭学报,1999,24(6).
[3]王崇林,梁睿,等.基于变耦电抗法的新型消弧线圈[J].电力系统自动化,2005,29(20):81-84.
[2]王崇林,等.可控硅控制三相五柱式消弧线圈的工作原理及波形分析[J].煤炭学报,1999,24(6).
[3]王崇林,梁睿,等.基于变耦电抗法的新型消弧线圈[J].电力系统自动化,2005,29(20):81-84.