TY - JOUR ID - 1036 TI - A Practical Approach for Coordinated Transmission Switching and OLTCs’ ‎Tap Adjustment: DIgSILENT-Based Improved PSO Algorithm JO - Journal of Operation and Automation in Power Engineering JA - JOAPE LA - en SN - 2322-4576 AU - Bagheri, A. AU - Rabiee, A. AU - Galavani, S. AU - Yassami, H. AU - Moeini, A. AD - Department of Electrical Engineering, Faculty of Engineering, University of Zanjan, Zanjan, Iran AD - Planning and Research Deputy, Zanjan Regional Electric Company, Zanjan, Iran Y1 - 2021 PY - 2021 VL - 9 IS - 2 SP - 103 EP - 115 KW - Transmission switching KW - OLTC’s tap adjustment KW - Improved PSO KW - DIgSILENT DO - 10.22098/joape.2021.7378.1533 N2 - Transmission lines switching and tap adjustment of power transformers are short-term alternatives to enhance the flexibility of power system operation. By a proper implementation of these alternatives, the operational problems such as lines congestion, bus voltage violations and excessive power losses can be alleviated. Traditionally, these two alternatives are applied separately due to the complexity of their simultaneous implementation as well as their coordination. In this paper, a DIgSILENT-based improved particle swarm optimization (IPSO) algorithm is proposed to implement the transmission switching and coordinated voltage control of power transformers, concurrently. The IPSO is implemented in DPL environment of Powerfactory-DIgSILENT, as a powerful software package commonly used by the electrical utilities. The proposed approach is applied to IEEE-14 bus system and the real transmission network of Zanjan Regional Electric Company (ZREC) located in Iran, in different scenarios considering all the existing practical constraints. The obtained results verify the effectiveness of the presented approach. UR - https://joape.uma.ac.ir/article_1036.html L1 - https://joape.uma.ac.ir/article_1036_24f2b3a595845fdd6a72d813b85e675c.pdf ER -