محمدامين ساكي

The unified power quality conditioner (UPQC) is used to compensate power quality problems caused by non-linear loads or network fluctuations for both load and network sides. By using the solar array and adding a battery as backup, it will increase the ability to compensate longer and provide more stable power from this renewable source. Finally, the ability to operate islanded when necessary is made possible by the battery support of the solar array, where the equipment is isolated from the grid, it provides the possibility to continuously feed the load. The important issue in using integrated power quality improvement is its control.The controller of this equipment consists of integration and coordination between series and shunt active power filter controllers and DC bus voltage maintenance which is known as control scheme. Synchronization phase detection in unbalanced and distorted conditions of voltages and currents is an important requirement for the operation of the control scheme. In the usual method, the phase-locked loop is used, which has limitations in the dynamic and harmonic conditions of the system.The task of the self-tuning filter is to calculate the principal component of the waveform and in combination with the unit vector generator, it extracts the phases for synchronization. The advantage of this method is that, in addition to high speed and accuracy, there is no need to manually adjust the coefficients and it is automatically updated. In this thesis, the advanced structure of the equipment is considered along with the simple and accurate control plan.First, the introduction of the structure of the unified power quality conditioner is done briefly, and then the control for each part is explained in detail. The proposed control scheme based on the self-tuning filter is simulated on the introduced structure in MATLAB software and the results are compared to the control scheme based on phase-locked loop whose information is given in the reference article to eva‎luate the effectiveness. Investigations show that the proposed design provides better performance both in harmonics compensation and phase synchronization. Also, the system can work in unbalanced and harmonic conditions of the point common coupling.

كيفيت توان , بهساز يكپارچه كيفيت توان , آرايه خورشيدي , ذخيره‌ساز باتري , فيلتر فعال , فيلتر خودتنظيم , توليد كننده بردار واحد

Power Quality , Unified Power Quality Conditioner , PV Array , Battery Energy Storage System , Active Filter , Self-Tuning Filter , Unit Vector Generation

MohammadAmin Saki

Dr.Alireza Jalilian