ملخص البحث :

This paper offers a systematic procedure for modelling and simulating a teachinglearning- based optimization (TLBO) technique that exercised with styling power system stabilizer (PSS) and UPFC-controller for 6-bus test system. TLBO is used to find an effective and powerful solution for power system stabilizers (PSS) and the power oscillation damping (POD) controller in power systems. The results show the fast damping oscillations and rapidly reaching the steady state with TLBO compared to other methods such as PI-POD and UPFC individually. The parameters of traditional PI are adjusted using try and error method

ملخص البحث :

Maintaining network synchronization is important to customer service. Low fluctuations cause voltage instability, non-synchronization in the power system or the problems in the electrical system disturbances, harmonics current and voltages inflation and contraction voltage. Proper tunning of the parameters of stabilizer is prime for validation of stabilizer. To overcome instability issues and get reinforcement found a lot of the techniques are developed to overcome instability problems and improve performance of power system. Genetic algorithm was applied to optimize parameters and suppress oscillation. The simulation of the robust composite capacitance system of an infinite single-machine bus was studied using MATLAB was used for optimization purpose. The critical time is an indication of the maximum possible time during which the error can pass in the system to obtain stability through the simulation. The effectiveness improvement has been shown in the system.

ملخص البحث :

This paper presents a study comparison of Flexible AC Transmission System (FACTS) device with Power System Stabilizer (PSS) to improve the response of transient stability of the multi-machine power system. In this paper, the Static Synchronous Compensator (STATCOM), the Static Var Compensator (SVC) and Unified Power Flow Controller (UPFC) can significantly improve the power stability, thus enhancing the overall stability of the system during the disturbance. In addition, the active power control of the power system, SVC, STATCOM and UPFC play an additional role in enhancing the stability of the terminal and thus play a vital role in controlling system stability. This research has looked at the specific performance and comparison of three devices as far as damping is concerned about system vibrations. The MATLAB software is using to study the impact of damping oscillations in a stability power system based on PSS and FACTS devices. The results showed significant improvement in transient stability when FACTS are applied by significantly reducing the time of error adjustment in the power system and effectively reducing network oscillation in contrast with when the devices are not applied

ملخص البحث :

This paper is aimed to design a power system which contains 20 arrangements of 2MW 11kV wind turbines a 40 MW offshore wind farm is simulated trendy PSCAD/EMTDC. The power is formerly transported through HVDC lines and linked to the grid. The fault ride through ( FRT )for the wind farm is organized through VSC-HVDC.By review two stages 6-pulse Disconnected (IGBT) Tyristors at the generator and grid side of the system two voltage source converter stations are simulated in PSCAD/EMTDC software. The control arrangement is joint in the middle of situations in statute to develop the (FRT) and voltage instruction for the wind farm. The wind turbine governor controls the pitch angle using power output and the generator speed. The pitch angle will change respectively in order to reduce the changes in the generator’s rotor speed. By decreasing the changes in rotor speed, wind turbine is able to generate more constant power with less effect on the power transmission and the control system can be used to reduce the effect of fault in wind farm side to fulfill the E.On requirements for increase the fault ride-through capability of the wind farm and that the duration of the fault plays a vital part in decision making for wind farms disconnection. This control system can be used for offshore wind farms linked to the grid where the wind farm is able to continue its operation without disconnection during the fault times.