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Distribution of the geomagnetically induced currents between the neutrals of certain power transformers in the standard configuration power grids is investigated. The allowances at which the quantitative estimates of the geomagnetically induced currents are obtained are formulated. A spatial model that allows considering a geographical arrangement of the power transformers when calculating the geomagnetically...
The article recommended the method of protection of power transformer from the influence of geomagnetically induced currents, by launching the resistive grounding mode at the period of geomagnetic disturbances and reversion to the solid-grounded mode on completing of geomagnetic disturbances. The article shows that for the identification of single-side saturation of the magnetic system of power transformer...
The article recommends the principle of commutative programming scan of the comparison signal. This principle allows linearization of transient characteristics «regulating pilot — output voltage» of pulse-width convertors. In the article obtained the expressions for determining the sequence of discrete samples, forming a functional scan reference signal. The functional scan is necessary for the linearization...
It is suggested the concept of a switching function used for the linearization of the static converter circuit in the analysis of steady-state and transient, defuse to the formal decision of problems of synthesis. The article shows the possibility of presenting switching functions in the basis of binary operations of choice of implicative algebra for the identification of individual variables with...
The scheme and a functioning principle of high-voltage thyristor key for protection of power transformer from geomagnetically induced currents are given. A method for calculating electrical effects for thyristors during normal and accident modes is developed.
In the article the principle of system for monitoring geomagnetically induced currents in the neutrals of power transformers is developed. Processed method of measured signals for detecting geomagnetically induced currents is suggested.
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