通过考虑相间耦合电压、陷波电荷和 CB 特性的影响,实现无补偿输电线路的同步切换

IF 1.4 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC
Alireza Karimonnafs
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引用次数: 0

摘要

同步合闸技术是降低暂态电流和电压、防止设备故障和提高电能质量的有效方法。所提出的算法首先考虑相间耦合电压和未补偿输电线路中的残余电压,计算出断路器(CB)两极间电压曲线的零点瞬间(ZVC 瞬时),该瞬间是理想的断路器最佳合闸瞬间。尽管其他研究仅通过耦合电压或残余电压来检测 ZVC。其次,该算法试图通过将延迟时间纳入之前计算的延迟值来考虑断路器的机械散射时间和介电强度下降率(RDDS)。通过该算法,CB 的每个相位都在理想的最佳闭合目标(ZVC 瞬时)内闭合,最大误差为一个采样点,然后,考虑到 CB 的特性,通过补偿 RDDS 和机械散射时间,CB 在最佳时间间隔内通电,使预击电压最小。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Synchronous switching of uncompensated transmission line, by considering the effect of coupling voltage between the phases, trapped charge and the characteristics of CB

Synchronous switching of uncompensated transmission line, by considering the effect of coupling voltage between the phases, trapped charge and the characteristics of CB

The synchronous closing technology is an effective way to reduce transient current and voltage, prevent equipment failures, and improve power quality. The proposed algorithm, first by considering the coupling voltages between phases and the residual voltages in an uncompensated transmission line, calculates the zero instant of the voltage curves (ZVC instant) across the poles of the circuit breaker (CB) that is ideally the optimum instant to close the CB. Although other studies have utilized ZVC detection by solely considering either coupling or residual voltages. Secondly, the algorithm seeks to account for the mechanical scattering time of the CB and the rate of decrease of dielectric strength (RDDS) by incorporating delay times into the previously calculated delay values. Although other works have investigated the effect of RDDS or mechanical scattering operation time on synchronous switching to some extent, they have not fulfilled any optimization taking both of them into account.By exerting this algorithm, each phase of CB is closed in the ideal optimum closing target (ZVC instant) with a maximum error of one sample, and then, taking into account the CB characteristics, by compensating the RDDS and mechanical scattering time, CB is energized in the optimal time interval, where pre-strike voltages are minimized.

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来源期刊
Iet Science Measurement & Technology
Iet Science Measurement & Technology 工程技术-工程:电子与电气
CiteScore
4.30
自引率
7.10%
发文量
41
审稿时长
7.5 months
期刊介绍: IET Science, Measurement & Technology publishes papers in science, engineering and technology underpinning electronic and electrical engineering, nanotechnology and medical instrumentation.The emphasis of the journal is on theory, simulation methodologies and measurement techniques. The major themes of the journal are: - electromagnetism including electromagnetic theory, computational electromagnetics and EMC - properties and applications of dielectric, magnetic, magneto-optic, piezoelectric materials down to the nanometre scale - measurement and instrumentation including sensors, actuators, medical instrumentation, fundamentals of measurement including measurement standards, uncertainty, dissemination and calibration Applications are welcome for illustrative purposes but the novelty and originality should focus on the proposed new methods.
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