Power System Real-Time Emulation: A Practical Virtual Instrumentation to Complete Electric Power System Modeling

Abstract

Hardware-in-the-loop (HIL) simulation is a technique that is being used increasingly in the development and test of complex systems. Real-world testing of an intricate system in a field like power plant can be challenging, time-consuming, expensive, and hazardous. HIL emulators allow engineers to test devices thoroughly and efficiently in a virtual environment with high reliability and minimum risk of defect. In this paper, the complete electric power system (including generator, turbinegovernor, excitation system, transmission lines, transformer, external grid and related loads) is implemented in MATLAB/Simulink environment. Different virtual instrument (VI) pages are modeled in the graphical programming language of LabVIEW which enable fast and reliable measurement functions such as data acquisition, archiving, real-time graphical display and processing. The interaction between MATLAB and LabVIEW is accomplished by generating a Phar Lap ETS Targets *.dll file which enables the two software to exchange real-time data. Also, a real 1518 kW excitation system is considered as a test case for introduced HIL system. This equipment is connected to LabVIEW software through a National Instrument PXI technology. Different scenarios (electrical frequency/active power change, voltage step response and etc.) are simulated in the designed Power System Emulator (PSE). The validity of implemented model for excitation system is verified by finding good matching between MATLAB and HIL simulation results. Index Terms-hardware-in-the-loop (HIL), LabVIEW, power system emulator (PSE), real-time simulation, virtual instrument.

Development of a mathematical model of frequency controlled induction electric drive

“…One more equation in the system ( ⁄ value) is obtained by differentiating the equation of motion of the electric drive with a quadratic dependence of the moment of resistance on the rotation frequency [12]:…”

“…By setting the necessary initial conditions [11], all types of transient processes (start, stop, reverse, load shedding and surge) are modeled, various forms of setting influences for their formation. Calculation of instantaneous values of currents, torques, and powers is accompanied by the calculation of integral characteristics -powers during the transient process, power factors and efficiency [12]. The complete system of initial differential equations describing the processes in the induction electric drive of centrifugal pumps consists of three groups: the equations of electromagnetic equilibrium (Kirchhoff), which describe the electromagnetic processes in the engine, the equations of electromechanical energy conversion, and the equations characterizing the features of the mechanical load on the motor shaft [13][14][15].…”

A Methodology for Real-Time HiL Validation of Hydraulic-Press Controllers Based on Novel Modeling Techniques

“…Multiple authors support this classification and suggest different platforms to develop the Hardware in the Loop validation. For instance, the same Fennibay et al in paper [37]; Moussaab et al, in [38]; Montana et al, in [39], and Ali et al, in [40]. Synchronizing these software and hardware platforms requires models capable of being simulated in Real-Time.…”

Hardware-in-the-Loop and Digital Control Techniques Applied to Single-Phase PFC Converters

“…Another possibility is the use of commercial hardware tools, such as spHIL [37], Typhoon HIL, dSPACE [38], Opal-RT or RTDS [39], which facilitate the design of the models through graphical interfaces and preconfigured models. In [40], a comparison of the different commercial simulators available is included. These FPGA-based systems use complex models defined by the user without the need for optimization knowledge with small integration steps (around 1 us) and PWM input reads of around 10-20 ns.…”