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首页> 外文期刊>Electric power systems research >Theoretical expression of rate of rise of recovery voltage across a circuit breaker connected with fault current limiter
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Theoretical expression of rate of rise of recovery voltage across a circuit breaker connected with fault current limiter

机译：与故障限流器相连的断路器两端的恢复电压上升速率的理论表达式

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The present paper looks at the mathematical expression of the rate of rise of recovery voltage (rrrv) across a circuit breaker connected with fault current limiter (FCL) as a function of the limiting impedance Z_(FCL) and the limited current when a fault occurs at a distance near the load-side terminals of the FCL. The FCL in current-limiting operation was assumed to have a limiting element composed of either an inductance or a resistance. In the model of the inductive FCL, a capacitance C_p consisting of a coil stray capacitance and a necessary additional capacitance was taken into account. Using the mathematical expression of the relationship between the rrrv and the limited current enables us to find out the dependence of the interrupting duty on circuit parameters. Unlike the resistive FCL where the rrrv is linearly proportional to the limited current, the rrrv for the inductive FCL depends not only upon the limited current but also on the capacitance C_p and the stray capacitance C_(FCL) of the FCL to the ground. Depending upon the kind of the FCL, the parameters of the FCL and the system, the general expression of the rrrv makes it possible to estimate the increasing or decreasing percentage of the rrrv across a circuit breaker connected with FCL.
机译：本文研究了连接故障电流限制器（FCL）的断路器两端的恢复电压（rrrv）的上升速率与故障阻抗Z_（FCL）和故障发生时的限制电流的关系的数学表达式。在FCL的负载侧端子附近。假设限流操作中的FCL具有一个由电感或电阻组成的限制元件。在电感式FCL模型中，考虑了由线圈杂散电容和必要的附加电容组成的电容C_p。使用rrrv和限制电流之间关系的数学表达式，我们可以找出中断占空比对电路参数的依赖性。与电阻rrrr与限制电流成线性比例的电阻式FCL不同，电感式FCL的rrrv不仅取决于限制电流，还取决于FCL的接地电容C_p和杂散电容C_（FCL）。取决于FCL的种类，FCL的参数和系统，rrrv的一般表达式使得可以估计与FCL连接的断路器两端rrrv的增大或减小百分比。

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