Protection without current transformers for electrical installations with three-phase bus ducts

IF 3.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Electric Power Systems Research Pub Date : 2024-11-27 DOI:10.1016/j.epsr.2024.111246

Mark Kletsel, Bauyrzhan Mashrapov, Rizagul Mashrapova

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Abstract

A current protection which responds to the difference in absolute values of phase currents and receives information from inductance coils (IC) mounted on three-phase bus duct enclosure is suggested. The protection does not need in current transformers, thus saving high-quality copper, steel, and expensive high-voltage insulation in unprecedented amount. This protection is comparable with traditional overcurrent protections in speed and reliability and is superior in sensitivity in the absence of neighboring bus duct. Induction of magnetic fields around bus duct enclosure, which act on ICs (considering fields produced by a neighboring bus duct), is studied in experiments and computer simulation. Based on results of these studies, IC mounting points are selected; protection operation algorithm and techniques for selecting protection operation parameters and estimating its sensitivity are developed. The operation algorithm takes into account a need in ensuring the protection operation in the events of fault in the circuits of any IC. A laboratory prototype of the protection system and structures for fastening ICs are described; voltage oscillograms confirming protection efficiency are presented.

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使用三相母线槽的电气装置无需电流互感器即可提供保护

建议采用一种电流保护装置，它能对相电流绝对值的差异做出反应，并能从安装在三相母线槽外壳上的电感线圈（IC）接收信息。该保护装置不需要电流互感器，因此可大量节省优质铜材、钢材和昂贵的高压绝缘材料。这种保护装置在速度和可靠性方面与传统的过流保护装置不相上下，而且在没有邻近母线槽的情况下灵敏度更高。实验和计算机模拟研究了母线槽外壳周围对集成电路起作用的磁场感应（考虑到邻近母线槽产生的磁场）。根据这些研究结果，选择了集成电路安装点；开发了保护运行算法和技术，用于选择保护运行参数和估计其灵敏度。运行算法考虑到了在任何集成电路发生故障时确保保护运行的需要。介绍了保护系统的实验室原型和用于固定集成电路的结构；展示了证实保护效率的电压振荡图。

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来源期刊

Electric Power Systems Research 工程技术-工程：电子与电气

CiteScore

7.50

自引率

17.90%

发文量

963

审稿时长

3.8 months

期刊介绍： Electric Power Systems Research is an international medium for the publication of original papers concerned with the generation, transmission, distribution and utilization of electrical energy. The journal aims at presenting important results of work in this field, whether in the form of applied research, development of new procedures or components, orginal application of existing knowledge or new designapproaches. The scope of Electric Power Systems Research is broad, encompassing all aspects of electric power systems. The following list of topics is not intended to be exhaustive, but rather to indicate topics that fall within the journal purview. • Generation techniques ranging from advances in conventional electromechanical methods, through nuclear power generation, to renewable energy generation. • Transmission, spanning the broad area from UHV (ac and dc) to network operation and protection, line routing and design. • Substation work: equipment design, protection and control systems. • Distribution techniques, equipment development, and smart grids. • The utilization area from energy efficiency to distributed load levelling techniques. • Systems studies including control techniques, planning, optimization methods, stability, security assessment and insulation coordination.