| 摘要 |
<p>The purpose of the present invention is to obtain a voltage detection device for substation equipment, said voltage detection device being capable of accurately detecting a high-frequency component transiently generated during power grid accidents, etc., and accurately measuring the voltage waveform response of a central conductor. This voltage detection device for substation equipment has an intermediate electrode (2) provided between the central conductor (1) of the substation equipment and a tank (3), thereby configuring a voltage division unit, detects the voltage (E1) of the central conductor (1) on the basis of the voltage (E2) of the voltage division unit, and comprises: an imperfect integration circuit (20) having inverse characteristics to the I/O voltage amplitude ratio - frequency characteristics of a high-pass filter (100) comprising floating electrostatic capacitance (11) between the central conductor (1) and the intermediate electrode (2), electrostatic capacitance relative to the ground (12), between the intermediate electrode (2) and the tank (3), and voltage division resistance (13) connected in parallel to the electrostatic capacitance relative to the ground (12); and a signal processing circuit (4) that outputs, as the voltage (E1) of the central conductor (1), a value on the basis of the output voltage (E3) of the imperfect integration circuit (20).</p> |
