Abstract
Currently used methods of simulation of doubly fed induction machines (DFIM), especially in real-time simulators (where a relatively large calculation step is used and high adequacy is required), do not provide the required adequacy, especially in rotor electrical circuits. In order to increase the adequacy of reproducing of electrical processes occurring in the circuits of the wound DFIM rotor, this paper presents a proposal and a verification of a new method of real-time simulation. The new method of mathematical modeling of electrical circuits uses voltage averaging at the calculation step. This method was supplemented by prediction of the machine’s rotor angle, which significantly increases the degree of adequacy of reproducing physical quantities present in DFIM, especially in the machine’s rotor. This method allows real-time simulation of electrical systems with a relatively large calculation step (of the order of 200 µs), while maintaining an appropriate degree of adequacy.
Highlights
The depletion of fossil fuel resources leads to the search for new, more economically and environmentally efficient sources of electricity
This paper presents a mathematical model of a doubly fed induction machine that was developed real-time simulations of electrical systems
A definite advantage of the presented model is the possibility of real-time simulation of energy conversion in doubly fed induction machine (DFIM), with the use of long integration steps, while maintaining a satisfactory level of adequacy
Summary
The depletion of fossil fuel resources leads to the search for new, more economically and environmentally efficient sources of electricity. In the electricity-generation sector, DFIM can be the basis for the process of obtaining electricity from a renewable energy source in a wind farm This is an example of a single-stage energy transformation system (wind’s kinetic energy into electricity) with high control possibilities (power converters), and a system highly susceptible to optimization in terms of increasing the efficiency of the entire power system. Noteworthy is theinadequacy of reproduction of and verify a new way of simulating, in real time, the operation of a doubly fed induction machine as electrical processes occurring in the circuits of the wound rotor, to which power electronic an electromechanical-energy converter. Used methods of simulation of induction electrical processes occurring in the circuits of the wound rotor, to which power electronic converters generators, especially in real-time simulators Is required), do not provide the required adequacy, especially in electrical circuits of the DFIM rotor
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