چكيده به لاتين
In experimental tests, there is usually a lot of limitations such as costs, failure probability, expensive equipment damage, no authorization by contractor for testing on grid and the difference Characteristic between two identical devices. Therefore, existence of a device that can emulate the properties of the electrical devices just as the actual type can have a lot of benefits. in this thesis, introduction and implementation of a dynamically programmable load emulator that is capable of emulate many loads current-time characteristics such as home appliances, pulse loads, electric cars, etc., is discussed.
First step is to have theoretical study and find a mathematical model of different types of loads that can be implemented in the LabVIEW software which is a real-time software and is able to apply instantaneous changes in time series. in LabVIEW software, a very user-friendly interface environment is designed, which is applied to the controller by choosing the load type. in this software, the home appliances loads, daily load consumption of grid, electric vehicles and etc. are designed and by selecting or changing each loads, it is able to change real-time variations in waveforms and aslo any changes in characteristic or amplitude is displayed at any time. then design and construction of this load emulator are performed based on buck converter. an optimal buck converter for implementation of the emulator is designed by considering all non-idealities and this converter is simulated in MATLAB software.
After that, by investigating the accuracy of the converter's performance and correcting parameters, these parameters are designed, implemented and then practical results have been obtained. This emulator can be used in laboratories for testing instead of actual equipment for different experiments such as testing of a regional power grid, experiments on electric vehicles charging and give a tremendous contribution for tests efficiency and network security.
The proposed emulator algorithm is simulated using PSCAD and MATLAB software environment with fixed step and presented in the report. simulation results show that the algorithm has improved dynamic and static performance. simulation and practical experiments results show that this emulator is able to emulate different types of load in LabVIEW software with very high accuracy and it is a very good sample of load emulator with acceptable approximation.
Keywords: load emulator, home appliances, electric vehicles, buck converter, ARDUINO
