Author : Muhamed Umran, Haider
journal of kerbala university,
2015, Volume 11, Issue 2, Pages 66-79
There are many causes that lead the generator to Loss of Excitation (LOE) such as, a short circuit in the field winding, unexpectedly open field breaker or a failure in the excitation system. LOE protection schemes are widely used to detect these faults quickly, but they remain insensitive to the external faults and for other disturbances in the power system. Power System Stabilizer (PSS) is used to measure and damp the power oscillations, which occur by cause of external faults, through the set point of the voltage regulator.
In this paper, the Multi-Band and Generic Power System Stabilizers (MB-PSS and GPSS) are been reviewed and examined in case of the generator momentarily loss its excitation, the power system must remain stable via the proposed stabilizer. The case study is based on radial power system are including: a main power station is connected with a substation across the transmission lines and a step-up transformer. The salient-pole synchronous generator is rotated by the Hydraulic Turbine and Governor (HTG) which have auto control when disturbance occurs in the power system. The performance of the power system is demonstrated by using the simulation.