چكيده به لاتين
This thesis first examines the methods of dispersed production control for improvement
Power quality has been addressed in the network. These two methods are current and voltage control methods. In the first method, using the measured values of the flow of the network and the flow of the consumer, the output of the distributed generation is adjusted in some way to provide optimal network management conditions to improve network flow.
Also, in the second method (voltage control), the measured values for quality improvement
of network voltage is used. In addition to examining common methods, the combined method as a third method is also studied and simulation results for all three methods, is presented. Simulation results examine the ability of methods mentioned in various work modes, which are compensatory modes, lack of compensation, and harmonic rejection mode. Also some conditions like distortion in the network such as frequency change, transition to island mode, and flexibility in the transition between different control modes has been investigated.
The analysis of simulation results has shown that, despite the fact that each one the methods have their own advantages and disadvantages, but the combination control method, totally has the best performance and provides the most suitable output for the load and the network. slowly especially that, this combination method uses a voltage control mode to compensate local load could reduce the total harmonic distortion to 2.19%
compared to other methods, a greater reduction in voltage is shown in the harmonic distortion to give in addition, unlike the current control method, the combined method of operation is possible in island mode, and in the absence of compensation, unlike other methods, still passive compensation.
