Authors: R.V. Belyaevsky, T.I. Utyuzh

Title of the article: Calculation of parameters of equipment overload protection automation during power output from power plants in electric network maintenance modes

Year: 2025, Issue: 5, Pages: 3-13

Branch of knowledge: 2.4.2. Electrotechnical complexes and systems (engineering)

Index UDK: 621.316.72

DOI: 10.26730/1816-4528-2025-5-3-13

Abstract: The article presents a comprehensive study comparing the effectiveness of two fundamentally different approaches to setting Overload Protection Automation (OPA) systems at thermal power plants. The research focuses on a critical analysis of the conventional method using fixed seasonal settings ("Winter", "Summer1", "Summer2") versus an innovative adaptive approach featuring real-time dynamic temperature-dependent setting adjustment. The methodological framework employs detailed mathematical modeling in RastrWin3 software, encompassing three key aspects: (1) calculation of permissible power flows considering seasonal and operational load variations, (2) comprehensive stability analysis of the power system under various operational scenarios including emergency and maintenance modes, and (3) evaluation of primary and backup equipment performance under extreme load conditions. The study's particular scientific contribution lies in the authors' developed comparative analysis methodology that incorporates both technical parameters (overload control accuracy, response time) and economic factors (generation capacity optimization, loss reduction). Results demonstrate that the adaptive system increases transmission line capacity by 5-7% compared to conventional methods while reducing false operation probability by 15-20%. The work thoroughly examines implementation aspects including reliability analysis, meteorological data processing algorithms, and integration challenges with existing control systems. The technical aspects of implementing the dynamic setting adjustment system are also addressed in detail.

Key words: Power grid maintenance modes equipment overload protection automation (OPA) transmission capacity operation algorithm power flow transmission capacity stability emergency control automation

Receiving date: 30.05.2025

Approval date: 30.06.2025

Publication date: 09.10.2025

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