Abstract
This paper presents the modeling, simulation and practical implementation of an inverter-based diesel generator emulator. The main purpose of this emulator is for the study of frequency variations in diesel-based autonomous power systems in a laboratory environment where the operation of a real diesel generator is not possible. The emulator basically consists in a voltage source inverter with a second order output filter which voltage references are given by the model of the diesel generator. The control of the emulator is based on the digital signal processor TMS320F2812, where the mathematical models of the diesel generator and the control of the inverter are computed in real-time. Parameters for the model were obtained from commercially available components. Experimental results for different values of speed droop showed that the emulator achieves a satisfactory performance in the transient and stationary response. For the stationary response, the measured frequency deviates from theoretical values with a mean absolute error of: 0.06 Hz for 0% droop, 0.037 Hz for 3% droop, and 0.087 Hz for 5% droop. For the transient response, the measured frequency nadir deviates from simulations in: 0.05 Hz for 0% droop, 0.02 Hz for 3% droop, and 0.1 Hz for 5% droop.
Highlights
In conventional power systems electrical energy is primarily generated by means of rotating machinery and supplied in the form of ac voltage, where the frequency of the ac voltage is associated to the rotational speed of generators
This paper presents the modeling, simulation and practical implementation of an inverter-based diesel generator emulator
The main purpose of this emulator is for the study of frequency variations in diesel-based autonomous power systems in a laboratory environment where the operation of a real diesel generator is not possible
Summary
In conventional power systems electrical energy is primarily generated by means of rotating machinery and supplied in the form of ac voltage, where the frequency of the ac voltage is associated to the rotational speed of generators. Frequency varies all the time due to a continuous interaction between loads and generators The characteristics of such frequency variations will mainly depend, among other factors, on the type of disturbance affecting the power system, the performance of the frequency control system, and physical properties of generators. Large interconnected power grids can be considered as stiff systems where a large power disturbance must occur before the frequency will deviate to any significant level. The work presented in this paper is part of a research project on dynamic control of frequency variations in diesel-based autonomous power systems (APS). The main objective of this paper is to present the modeling and implementation of a diesel generator emulator based on a voltage source inverter.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
