Abstract
The Electrical power system has become vast and more complex, so it is subjected to sudden changes in load levels. Stability is an important concept which determines the stable operation of the power system. Transient stability analysis has become one of the significant studies in the power system to ensure the system stability to withstand a considerable disturbance. The effect of temporary occurrence can lead to malfunction of electronic control equipment. The application of flexible AC transmission systems (FACTS) devices in the transmission system have introduced several changes in the power system. These changes have a significant impact on the power system protection, due to differences inline impedance, line current and voltage. On the distance relaying protection system to identify essential issues that protection engineers need to consider during the stages of design and operation of the protection system. Transient analysis can be conducted using a simulation software package. One of the commercial simulation software package used by industry worldwide is Siemens Power System Simulation for Engineering (PSS/E). The object of this work is to improve the Transient stability and to clear critical fault times of the Kurdistan Region Government (KRG) network by using optimal FACTS devices in different optimal locations under fault conditions.
Highlights
Electrical strength system is commonly nonlinear system and a compound network, consists of three essential stages which are generation, transmission and distribution substations
Power system stability is classified into three types stability; dynamic stability is a type of rotor angle stability to discuss the stability when there is a significant disturbance
In our transmission line network, we suggest to use shunt fact devices Static VAR Compensator (SVC) for improving voltage stability, voltage collapse and reactive power for increasing, transmitting power capacity, oscillation and damping by contingent on the optimal sites
Summary
Electrical strength system is commonly nonlinear system and a compound network, consists of three essential stages which are generation, transmission and distribution substations. The exporter central part is generation stations that transmit the electricity to the load. As a reference of growing power requesting, in transmission line sometimes may be loaded more than lines capacity at construction. Generation stage, on the electric power network, is the primary point of the power system for using synchronous generators to product electrical voltages. After production for increasing voltage using the set up a transformer before transferring it to minimizing the current in the lines in order to minimize the losses in the transmission lines. The voltage is stepped down using step down transformers that are distributed . An unexpected massive disturbance contains faults, clearing of faults, surprising load changes and persistent or uncontrollable tripping of lines and generators
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