Abstract
For a correct determining of the overvoltage limiters characteristics, as well as the optimal location of its installation is required to use reliable information about the primary electrical quantities, especially voltage level, in different operation modes of electric power systems (EPS). This problem is highly complex, due to the danger of the experiments in real EPS. Methods and tools for calculation and researches of quasi-stationary and switching overvoltages which are applied to solve this problem not always allow to obtain satisfactory results. The developed tools of comprehensive real-time simulation of electric power systems, providing adequate reproduction of processes associated with overvoltages in EPS, are presented in the article. Fragments of the researches of switching overvoltage in the electrical network of the real power system are given.
Highlights
Reliability and efficiency of design, research and operation of the electric power systems (EPS) depend on the completeness and accuracy of the information about working conditions of the equipment of EPS in normal, emergency and post-emergency modes
The validity of the choice of types and locations of their installation in accordance with these instructions depends on the adequacy of the information about the possible overvoltage value and duration, the most dangerous of which are switching overvoltage
In view of the known specificity and complexity of modern power systems to obtain this kind of information is possible only by mathematical modeling of EPS
Summary
Reliability and efficiency of design, research and operation of the electric power systems (EPS) depend on the completeness and accuracy of the information about working conditions of the equipment of EPS in normal, emergency and post-emergency modes. Hybrid real-time power system simulator The concept of continuous, adequate, real-time modeling with an unlimited range of quasi-steady-state and transient processes, including the surge in equipment of EPS, in the case of normal, emergency and post-emergency conditions of their operation was developed to solve problems mentioned above [10, 11] To implement this concept Hybrid real-time power system simulator (HRTSim) was created [12] and adapted for the researching of all kinds of overvoltage and using this sufficiently complete and accurate information to select the types and locations of surge arresters, including, according to the previously named instructions and recommendations. Developed tools provide continuous and methodically accurate solution in a real time and on an unlimited range with guaranteed acceptable instrumental inaccuracy of stiff, non-linear, high dimensionality systems of differential equations This allows one to reproduce the spectrum of steady state and transient processes, surges of the real EPS, which in turn makes it possible to produce reliable and valid selection of types and locations of surge arresters installation. Different abilities of HRTSim application with examples of its realization is given in [13,14,15]
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