| 分频输电系统中真空断路器的开断性能 |
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| 引用本文： | 刘志远.分频输电系统中真空断路器的开断性能[J].高压电器,2011,47(4):101-103,107. |
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| 作者姓名： | 刘志远 |
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| 作者单位： | 西安交通大学电力设备电气绝缘国家重点实验室,西安,710049 |
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| 摘 要： | 风能作为可再生的绿色能源,将成为以分布式发电为特征的智能电网的重要组成部分.然而现有电力系统抗风电扰动能力差是影响风电产业发展的关键性制约.采用分频输电技术可解决上述风电并网问题,而分频输电会造成断路器开断短路电流时有较长的燃弧时间,从而引起断路器的开断能力降低.笔者综述了分频输电对真空断路器开断能力的影响.Slade...
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| 关 键 词： | 真空断路器 分频输电 智能电网 开断能力 电流频率 |
Breaking Performance of Vacuum Circuit Breaker in Fractional Frequency Transmission System |
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| LIU Zhi-yuan.Breaking Performance of Vacuum Circuit Breaker in Fractional Frequency Transmission System[J].High Voltage Apparatus,2011,47(4):101-103,107. |
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| Authors: | LIU Zhi-yuan |
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| Abstract: | Wind power,as a renewable green power,will be a key part of smart grid where distributed generation is an important characteristic.However,the present grid is not convenient to accept wind power.It is reported fractional frequency transmission technologies could solve the problem.But in the fractional frequency transmission system,there appears a longer arcing time for circuit breakers to interrupt short circuit current.The longer arcing time will decrease the interrupting capacity of circuit breakers.This paper discusses the influence of the fractional frequency transmission system on the interrupting capacity of vacuum circuit breakers.Slade pointed that the interrupting capacity of vacuum circuit breakers decline with decrease of frequency as the following functionix(f1)/ix(f2)=(f1/f2)～(1/2).With transverse magnetic field contacts,the interrupting capacity of 12 kV vacuum interrupters with contact diameter 62 mm dropped from 40 kA at 50 Hz to 25 kA at 16(2/3) Hz. |
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| Keywords: | vacuum circuit breake fractional frequency transmission smart power grids interrupting capacity power frequency |
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