Abstract
The method for defining the nodal equivalent parameters of grid elements based on synchrophasor measure-ments during transients in a power system is proposed. It allows to define the topology and parameters of nodal equivalents and makes it possible to implement adaptive models for problems of power system control.
Highlights
The method for defining the nodal equivalent parameters of grid elements based on synchrophasor measure-ments during transients in a power system is proposed
The rapid development and steadily widening introduction of synchrophasor measurements technology in power systems all over the world enable new possibilities to improve the quality of primary equipment models involved in power system control applications
The methodology for defining the instantaneous power system performance parameters was developed [2], allowing to significantly improve the accuracy of the performance parameters calculation during electromechanical transients, including the changes over periods shorter than the industrial frequency; the possibility of defining the inertia constant of a power generating unit [3] and its damping capabilities [4], constituting the most valuable part of a synchronous machine adaptive model were investigated in detail
Summary
REI-equivalent is a substitution circuit, completely equivalent to the initial network and independent from the conditions of the rest of the system. A network fragment can be selected from the resulting equivalent circuit, containing the node under consideration, all nodes, connected to it, and the connection lines. The conventional approach to the equivalent topology and parameters definition implies that all nodes, not included into the resulting equivalent circuit, are eliminated by means of Gauss technique. This methodology’s drawback is that it can lead to significant errors [7, 8], since the reference initial data values might. It is proposed to preserve the Gaussian elimination procedure for defining the electrical network equivalent topology. They are to be used as the reference values in order to compare the experiment results
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