A Novel Differential Protection Scheme for Distribution Lines Under Weak Synchronization Conditions Considering DG Characteristics

Wei, Jeng−Hua; Zhang, Shuo; Li, Jian; Feng, Meixin; Feng, Shiguang; Lu, Yuping

doi:10.1109/access.2023.3304647

Cited by 4 publications

(1 citation statement)

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“…As the number of DGs in a distribution system increases, the fault detection [28] and fault classification systems [29] must consider the current characteristics in cases with DG interconnections. In addition, the changes in the current characteristics also affect the coordination of conventional protection systems that do not support the presence of a DG system [30,31]. Previous studies have shown the potential of improving voltage levels in distribution systems by using interconnected DG systems on the line.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Various Single Wind-Power Distributed Generation Placements for Voltage Drop Improvement in a 22 kV Distribution System

Ananwattanaporn,

Thongsuk,

Lertwanitrot

et al. 2024

Sustainability

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A major challenge in distribution systems is the issue of voltage drop along the distribution line resulting from an increased load capacity connected to the utility. A significant voltage drop can affect the performance of a distribution system and cause quality issues for end users, impacting the system’s long-term sustainability and reliability. Therefore, regulations have been set stating that the voltage level should not be more that 5% higher or lower than the rated voltage. Thus, in this study, we aimed to evaluate the voltage level characteristics of a 22 kV distribution system that replicates the actual distribution system in the Provincial Electricity Authority. A voltage improvement technique based on distributed generation placement was proposed. In addition, the distribution system characteristics with and without distributed generation placement were evaluated under fault conditions. The results indicate that distributed generation placement in the distribution system can improve the voltage level along the distribution line. However, the level of increase in voltage depends on the size of the load, the capacity of the distributed generation, and the location of the distributed generation system on the distribution line. Furthermore, placing a distributed generation system with a minimum capacity at the proposed location can improve the voltage within the utility’s standard level. Thus, the installation of a distributed generation system in the distribution system is beneficial in terms of voltage improvement in the distribution system and provides the power system with a sustainable method to address the issue of voltage drop.

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