Electricity has played an increasingly important role in our daily lives, with a dramatic increase in consumption,
Generation of electricity in the last hundred years. The electric power system serves to deliver electricity to consumers.
An electric power system deals with electric generation, transmission, distribution and consumption. In a traditional power
System, the electric energy is generated by centralised centrals and flows to clients through the transmission and distribution
net. The speed of the electric energy transported within the lines of the power system is called "power flow", to be more
Specific, it is the active and reactive power that flows in the transmission lines. During the last twenty years, the operation of power
Changes due to the growth of consumption, the development of new technologies, the behaviour of the electricity market and
The development of renewable energies.
With the rapid development of power electronics, flexible AC transmission devices (FACTS) have been proposed and
Implemented in energy systems. FACTS devices can be used to control power flow and improve system stability. Particularly
With deregulation of the electricity market, there is a growing interest in the use of FACTS devices in operation and control
Of power systems with new load conditions and power flow. Better utilisation of existing energy systems for
Capabilities and irreconcilability through the installation of FACTS devices becomes essential. Due to the current situation, there are two
Aspects that must be considered in the use of FACTS devices the first aspect is the operation of the flexible energy system according to the
Power flow control capability of FACTS devices. The other aspect is the improvement of the transient and stationary stability of
Systems of power. FACTS devices are the right equipment to deal with these challenges.
According to IEEE, FACTS, which is the abbreviation for flexible AC transmission systems is defined as alternating current
Transmission systems incorporating electronic power-based controllers and other static controllers to improve irreconcilability and power transfer
capacity. Flexible AC transmission technology (FACTS) is the application of power electronics in transmission systems.
The main objective of this technology is to control and regulate the electrical variables in the power systems. This is achieved using
Converters as a controllable interface between two terminals of the power system. Basically, the family of FACTS based devices
(VSCs) consists of a series compensatory, a bypass compensatory and a bypass / series compensatory. The static
Compensatory (STATCOM) is a shunt-connected device that is capable of providing reactive power support at a very distant network location
Of the generators.
The Unified Power Flow Controller (UPFC) is the most powerful for power systems, bypass circuits and redundant backups (backup
Transformer, etc.) which, on the other hand, increase the cost. Therefore, the UPFC has not been used commercially, not even
However, it has the most advanced control capabilities. This article presents a new concept, called Distributed Power Flow Controller
(DPFC) derived from the UPFC. Like the UPFC, the DPFC is able to control all system parameters. The DPFC
Eliminates the common link between the shunt and serial converters. The active power exchange between the bypass and
Series is through the transmission line to the third harmonic frequency. The serial converter of the DPFC uses distributed FACTS.