Doljinsuren, E., Natsagdorj, Ch. and Munkhtuya, B. (2022) Statistics of Operation of Automatic Reclosing Device of Electric Network of Mongolia. Development of Information Technology in Energy and Mining Industry-2022, Scientific Conference, Darkhan, Mongolia, 2022.

has been cited by the following article:

• TITLE: Impact of Single-Phase Automatic Recloser of Critical Transmission Line on the Stability of the Power Transmission Network

  AUTHORS: Chuulan Natsagdorj, Ganbat Gantamir, Erdenebileg Doljinsuren

  KEYWORDS: Automatic Reclosing, Single-Phase Automatic Reclosing, Relay Protection, Overhead Power Lines, System Stability, Rotor Angle Stability

  JOURNAL NAME: Journal of Power and Energy Engineering, Vol.13 No.2, February 28, 2025

  ABSTRACT: In order to increase the stability of the Mongolia power system, a single-phase automatic reclosing device (SPAR) was introduced on double-circuit power lines built with a size of 330 kV, operating on a voltage of 220 kV and a length of 250 km. These overhead power lines (L-213, L-214) connect the 220/110/35 kV “Songino” substation with the “Mandal” substation and form system networks. This paper presents the challenges encountered when implementing single-phase automatic reclosing (SPAR) devices and compares the changes in power system parameters before and after SPAR deployment for a long 220 kV line. Simulations and analyses were carried out using DIgSILENT PowerFactory software, focusing on rotor angle stability, and the overall impact on the power system during short-circuit faults. The evaluation also utilized measurement data from the Wide Area Monitoring System (WAMS) to compare system behavior pre- and post-implementation of SPAR. The findings reveal that SPAR significantly enhances system reliability and stability, effectively mitigating the risk of oscillations and stability loss triggered by short circuits. This improvement contributes to a more resilient power system, reducing the potential for disturbances caused by faults.