FIELD: electricity.
SUBSTANCE: method of measuring high-voltage by means of resistive divider consists in measurement of voltage values at output of low-voltage arm of divider with periodic calibrated variation of resistance of its high-voltage arm. Wherein the first and second sets of discrete measured voltage values are formed respectively at first value of resistance of high-voltage arm at odd periods of variation and at second value of resistance of high-voltage arm at even periods of variation. Then first and second sets of discrete values are formed for all odd and even periods of variation by adding measured values of discrete values to the first and second sets calculated by interpolation method respectively, at first resistance value of high-voltage arm at even periods of variation and at second resistance value of high-voltage arm at odd periods of variation. The set of discrete values of high-voltage resistance is calculated on the basis of formed sets of discrete values of voltage, after that rated value of high-voltage resistance is calculated by integration of obtained set of discrete values of resistances with dropping of abnormal values. Determination of high-voltage value is performed by calculation formulas, respectively for odd and even periods of variation considering measured values of voltages at the divider output, the values of calibrated resistances and rated value of high-voltage resistance. To implement the method, a high-voltage measuring device is proposed.
EFFECT: improved accuracy of high-voltage measurement by resistive divider due to exclusion of high-voltage value change effect in measurement process, possibility of measuring instantaneous values of voltage and reducing effect of temperature and other slowly changing processes, including ageing to the divider accuracy characteristics, possibility of using in the design of the high-voltage arm of the resistors divider with high temperature resistance coefficients.
4 cl, 3 dwg
