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首页> 外文期刊>High Temperature Material Processes >USING INTELLIGENT OPERATION OF A HIGH VOLTAGE CIRCUIT BREAKER TO IMPROVE ITS OPENING AND CLOSING CAPACITY
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USING INTELLIGENT OPERATION OF A HIGH VOLTAGE CIRCUIT BREAKER TO IMPROVE ITS OPENING AND CLOSING CAPACITY

机译：使用高压断路器的智能操作来提高其断开和闭合能力

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摘要

The research for the characteristics and the applications of "Intelligent Operation of a Circuit Breaker" has become a new, interesting and attracted attention topic because "Intelligent Operation" can improve the opening and closing capacity of a high voltage circuit breaker and its reliability. In this paper, the mathematical models and calculating method of the dielectric recovery characteristic and moving characteristic of a circuit breaker are developed, based on the breakdown theory of critical electric strength. The sensitivity of the gap between open contacts to non-uniform coefficients of electric field is considered the dielectric recovery strength as calculated. The simulation results are in accordance with the experiment results. The influences of the characteristic of dielectric recovery on the circuit breaker in the opening and closing are analyzed. It is pointed out that "Intelligent Operation" of a circuit breaker can change the characteristic of dielectric recovery, and improve its opening and closing capacity consequently. The operating overvoltage appears when a circuit breaker, especially a high-voltage circuit breaker is opening or closing, which causes strong Electro Magnetic Interference (EMI) and might even damage power and electric equipments near the circuit breaker. In this paper the factors which create operating overvoltage are analyzed. The methods for reducing or avoiding operating overvoltage are put forward, which are realized by changing the moving characteristics of the circuit breaker, such as the initial phase confirmed in closing, the current phase selected and the diameter of the drain oil aperture of operating mechanism adjusted in opening, i.e. the intelligent operation used in the moving of circuit breaker.
机译：由于“智能操作”可以提高高压断路器的分闸和闭合能力及其可靠性，因此对“断路器智能操作”的特性和应用的研究已成为一个新的，有趣的且引起关注的话题。本文基于临界电气强度击穿理论，建立了断路器介电恢复特性和运动特性的数学模型和计算方法。打开触点之间的间隙对非均匀电场系数的敏感性被认为是所计算的介电恢复强度。仿真结果与实验结果吻合。分析了介电恢复特性对断路器分闸和合闸的影响。指出断路器的“智能操作”可以改变电介质恢复的特性，从而提高其分断和闭合能力。当断路器（尤其是高压断路器）打开或闭合时，会出现工作过电压，这会引起强烈的电磁干扰（EMI），甚至可能损坏断路器附近的电源和电气设备。本文分析了产生工作过电压的因素。提出了减少或避免操作过电压的方法，这些方法是通过改变断路器的运动特性来实现的，例如闭合时确认的初始相位，选择的当前相位以及调整操作机构的排油孔直径的方法。断开时，即断路器移动中使用的智能操作。

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