A fault detection device comprises: a measurement data acquirer that acquires measurement data for current flowing on power supply lines that are connected to multiple electrical devices; a clusterer that classifies the measurement data for a past fixed period into multiple clusters based on at least one of frequency and phase with respect to an AC cycle; a pattern analyzer that analyzes each of the clusters for an appearance pattern of measurement data that satisfy a preset standard; and a fault determiner that determines the occurrence of a fault when measurement data is acquired that differs from the analyzed appearance pattern.

The present invention relates to a device for detecting a partial discharge for a power transformer which detects an electromagnetic signal occurring due to faulty insulation. The device includes an antenna unit receiving electromagnetic waves, an insulator including the antenna unit, a metallic air-tight unit that seals a connector connected to the insulator and connecting a coaxial cable, and the coaxial cable exposed to the outside of the metallic air-tight unit. Thus, it is possible to enhance broadband properties through an internal conductor of a drain valve.

The present invention relates to a device for detecting a partial discharge for a power transformer which detects an electromagnetic signal occurring due to faulty insulation. The device includes an antenna unit receiving electromagnetic waves, an insulator including the antenna unit, a metallic air-tight unit that seals a connector connected to the insulator and connecting a coaxial cable, and the coaxial cable exposed to the outside of the metallic air-tight unit. Thus, it is possible to enhance broadband properties through an internal conductor of a drain valve.

In the field of power transmission networks, particularly high voltage direct current (HVDC) power transmission networks, there is provided an electrical assembly (10). The electrical assembly (10) comprises a converter (12) that includes at least one AC terminal (14A, 14B, 14C) for connection to an AC network (16) and at least one DC terminal (18, 22) which is operatively connected to a DC power transmission medium (20, 24). The electrical assembly (10) also includes a signal injection circuit (32) which is operatively coupled with at least one DC power transmission medium (20, 24). The signal injection circuit (32) includes a signal generator (38) to selectively inject a plurality of different frequency signals into the said at least one transmission medium (20, 24). In addition the signal injection circuit (32) includes a signal analyser (42) to establish a response signature of the said at least one transmission medium (20, 24) to the plurality of different frequency injected signals. The signal injection circuit (32) also includes a control unit (46) that is programmed to detect a dielectric breakdown in the said at least one transmission medium (20, 24). More particularly the control unit (46) is programmed to control the signal generator (38) to inject a plurality of different frequency signals into the said transmission medium (20, 24), retrieve the corresponding response signature of the said transmission medium (20, 24) from the signal analyser (42), and compare the response signature to a plurality of reference signatures corresponding to dielectric breakdown and non-breakdown conditions in the said transmission medium (20, 24).

In the field of power transmission networks, particularly high voltage direct current (HVDC) power transmission networks, there is provided an electrical assembly (10). The electrical assembly (10) comprises a converter (12) that includes at least one AC terminal (14A, 14B, 14C) for connection to an AC network (16) and at least one DC terminal (18, 22) which is operatively connected to a DC power transmission medium (20, 24). The electrical assembly (10) also includes a signal injection circuit (32) which is operatively coupled with at least one DC power transmission medium (20, 24). The signal injection circuit (32) includes a signal generator (38) to selectively inject a plurality of different frequency signals into the said at least one transmission medium (20, 24). In addition the signal injection circuit (32) includes a signal analyser (42) to establish a response signature of the said at least one transmission medium (20, 24) to the plurality of different frequency injected signals. The signal injection circuit (32) also includes a control unit (46) that is programmed to detect a dielectric breakdown in the said at least one transmission medium (20, 24). More particularly the control unit (46) is programmed to control the signal generator (38) to inject a plurality of different frequency signals into the said transmission medium (20, 24), retrieve the corresponding response signature of the said transmission medium (20, 24) from the signal analyser (42), and compare the response signature to a plurality of reference signatures corresponding to dielectric breakdown and non-breakdown conditions in the said transmission medium (20, 24).

In a high-speed measurement mode, a high-voltage measurement mode (V0 measurement) is omitted and only a negative-pole side ground fault resistor voltage measurement mode (VC1n measurement) and a positive-pole side ground fault resistor voltage measurement mode (VC1p measurement) are performed. In the negative-pole side ground fault resistor voltage measurement mode (VC1n measurement) and the positive-pole side ground fault resistor voltage measurement mode (VC1p measurement), the charging time for the flying capacitor is set to a second predetermined time period that is shorter than a first predetermined time period, which is different from basic operations in a normal measurement mode.

In a high-speed measurement mode, a high-voltage measurement mode (V0 measurement) is omitted and only a negative-pole side ground fault resistor voltage measurement mode (VC1n measurement) and a positive-pole side ground fault resistor voltage measurement mode (VC1p measurement) are performed. In the negative-pole side ground fault resistor voltage measurement mode (VC1n measurement) and the positive-pole side ground fault resistor voltage measurement mode (VC1p measurement), the charging time for the flying capacitor is set to a second predetermined time period that is shorter than a first predetermined time period, which is different from basic operations in a normal measurement mode.

Embodiments relate to a method, apparatus, and system for passively detecting strength of an electromagnetic field. An electroactive polymer (EAP) is configured with an antenna in communication with an RC circuit. The EAP is positioned proximal to a sensor. In response to receipt of a transient electromagnetic pulse due to an electrostatic discharge, the circuit captures the received pulse and transmits the pulse to the EAP. The EAP reacts to the pulse in the form of a deflection. The magnitude of the deflection correlates to the field strength which caused the received pulse. As deflection of the EAP is communicated to the proximally positioned sensor, a recording of the electrostatic discharge takes place.

Embodiments relate to a method, apparatus, and system for passively detecting strength of an electromagnetic field. An electroactive polymer (EAP) is configured with an antenna in communication with an RC circuit. The EAP is positioned proximal to a sensor. In response to receipt of a transient electromagnetic pulse due to an electrostatic discharge, the circuit captures the received pulse and transmits the pulse to the EAP. The EAP reacts to the pulse in the form of a deflection. The magnitude of the deflection correlates to the field strength which caused the received pulse. As deflection of the EAP is communicated to the proximally positioned sensor, a recording of the electrostatic discharge takes place.

A method for testing using an automated test equipment is presented. The method comprises transmitting instructions for performing an automated test from a system controller to a tester processor, wherein the instructions comprise parameters for a descriptor module. The method also comprises programming a reconfigurable circuit for implementing the descriptor module onto an instantiated FPGA block coupled to the tester processor. Further, the method comprises interpreting the parameters from the descriptor module using the reconfigurable circuit, wherein the parameters control execution of a plurality of test operations on a DUT coupled to the instantiated FPGA block. Additionally, the method comprises constructing at least one packet in accordance with the parameters, wherein each one of the at least one packet comprises a command for executing a test operation on the DUT. Finally, the method comprises performing a handshake with the DUT to route the at least one packet to the DUT.