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首页> 外文期刊>Electric Power Components and Systems >Emulation of Auto-Reclosing Scheme with Adaptive Dead Time Control for Protection of Series Compensated Transmission Line
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Emulation of Auto-Reclosing Scheme with Adaptive Dead Time Control for Protection of Series Compensated Transmission Line

机译：自适应死区控制的自动重合闸方案仿真，以保护串联补偿输电线路

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摘要

Series compensation plays an important role in smart power grid to improve power transfer capacity and voltage profiles. Majority of faults occurring in grid are transient in nature. However, discrimination between transient fault and permanent fault are contemporary problems in the field of distance protection of transmission line. Auto-reclosure is one of the foremost solutions for the same. This paper demonstrates implementation of auto-reclosing scheme using Modified Full Cycle Discrete Fourier Transform with adaptive dead time control. The fault detection logic is based on monitoring impedance trajectory in the R-X diagram of distance relay. The reclosing instance is identified by examining differential voltage across the contacts of circuit breaker. During transient fault condition, based on the time by which the breaker voltage retarded to normal value (below preset threshold) is used to set adaptive dead time of reclosure. Software validations have been performed with the variation in fault location, fault resistance, and fault location with varying line compensation level. Real time validation is also performed using digital signal controller on laboratory prototype. The outcome of simulation and emulation indicates substantial reduction in dead time indicating effectiveness of the developed scheme.
机译：串联补偿在智能电网中为提高功率传输能力和电压曲线起着重要作用。电网中发生的大多数故障本质上都是瞬态的。然而，在传输线距离保护领域，暂态故障和永久性故障之间的区别是当代的问题。自动重合闸是最重要的解决方案之一。本文演示了采用自适应死区时间控制的改进全周期离散傅里叶变换实现自动重合闸方案。故障检测逻辑基于监视距离继电器R-X图中的阻抗轨迹。通过检查断路器触点之间的差分电压来识别重合闸实例。在暂态故障状态期间，基于断路器电压延迟到正常值（低于预设阈值）的时间来设置自适应重合闸死区时间。通过使用不同的线路补偿水平来确定故障位置，故障电阻和故障位置的变化，从而进行了软件验证。还可以使用数字信号控制器对实验室原型进行实时验证。仿真和仿真的结果表明停滞时间大大减少，这表明所开发方案的有效性。

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