Open AccessContribution of FACTS devices in power systems security using MILP‐based OPF
Author(s) -
Nikoobakht Ahmad,
Aghaei Jamshid,
Parvania Masood,
SahraeiArdakani Mostafa
Publication year - 2018
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2018.0376
Subject(s) - flexibility (engineering) , computer science , electric power system , linear programming , flexible ac transmission system , representation (politics) , mathematical optimization , power flow , transmission (telecommunications) , integer programming , variety (cybernetics) , transmission system , power (physics) , algorithm , mathematics , artificial intelligence , telecommunications , statistics , physics , quantum mechanics , politics , political science , law
Traditionally, electric system operators have dispatched generation to minimise total production costs ignoring the flexibility of the AC transmission system (ACTS). One available option to enhance power system security is to harness the flexibility of the ACTS, where a variety of flexible AC transmission system (FACTS) devices can be incorporated in the ACTS. However, utilisation of FACTS devices is limited today due to the complexities that these devices introduce to the AC optimal power flow (ACOPF) problem. The mathematical representation of the full ACOPF problem, with the added modelling of FACTS devices, is a non‐linear programming (NLP) optimisation problem, which is computationally burdensome for large‐scale systems. This study presents a method to convert this NLP problem into a mixed‐integer linear program (MILP) where a certain level of solution accuracy can be achieved for a time budget. In this regard, this study first proposes a linear AC OPF model, using which the OPF solution with the operation of FACTS devices is obtained. In addition, the loadability of the power systems is utilised to quantify the impacts of FACTS devices on improving the security of system. The OPF problem including FACTS devices based on a linearised model is tested on a 6‐bus and the IEEE 118‐bus test systems.