Design of Nanosecond-level Transient Electric Field Sensor and its Application in HVDC Converter Station

This paper proposes a miniaturization, wideband and nanosecond-level risetime transient electric field (E-field) sensor based on a monopole electrically small rod antenna. The upper cut-off frequency of the sensor can reach 680 MHz. For the purpose of assessing the actual detection capability of the sensor in HVDC converter stations, the sensor designed in this paper was used to measure the electric field in the valve hall in artificial short-circuit tests. The measurement results of the transient E-field indicates that the sensor is able to respond instantaneously to the E-field generated by the action of the key power electronic equipment in the valve hall.