Enhanced primary protection scheme for MTDC network using modified linear quadratic score

IF 3.3 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Electric Power Systems Research Pub Date : 2025-01-23 DOI:10.1016/j.epsr.2025.111418

Praveen Kumar Gupta, Subhransu Ranjan Samantaray

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引用次数: 0

Abstract

As MTDC network expands, identifying faults and developing reliable protection schemes is crucial. This paper presents a single-ended, fast and reliable primary protection scheme based on Linear Quadratic Score (LQS) for fault detection. The scheme requires only line current and leverages LQS to distinguish between sudden changes due to faults and gradual variations from load change. This feature allows for detection of faults ranging from a bolted fault to high-resistance fault (up to 800 Ω) on a 400 km long transmission line. Further, LQS is modified to enable the scheme to differentiate between internal and external faults. The scheme also incorporates Minimum Time Fault Detection (MTFD), preventing false tripping during disturbances. It operates effectively in noise environment (30 dB SNR), evaluated for different CLR size, and avoids mis operation during adjacent line breaker operations. Further, performance of proposed scheme is also validated on Real Time Digital Simulator (RTDS) environment. Results demonstrate that, proposed protection scheme is fast, sensitive, and selective under different faults and can be implemented on any network configuration.

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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.