Abstract: An online monitoring method for insulation status of substation utility cables is provided. The method includes that two ends of a to-be-monitored cable are connected to a primary monitoring device and a secondary monitoring device by using a first coupler and a second coupler respectively; and the primary monitoring device and the secondary monitoring device each inject a high-frequency test signal into the to-be-monitored cable, collect a high-frequency reflected signal in the to-be-monitored cable, perform signal processing by using a frequency-domain peak iterative search algorithm, and extract reflection point parameter information, and the insulation aging status of the to-be-monitored cable is determined by integrated monitoring parameter information at two ends of the to-be-monitored cable.

Abstract: Provided are an FPGA chip-based system and method for detecting a cable insulation state. A cable insulation state monitoring program is started through a control switch. An FPGA chip generates a detection signal of a digital domain into a first circuit and sends the detection signal to a coupler after the detection signal is amplified by a sending circuit. The coupler injects the detection signal into a to-be-detected cable connected to the coupler. The coupler extracts a reflection signal from the to-be-detected cable. The FPGA chip evaluates the state of the to-be-detected cable according to the reflection signal.

Abstract: Provided are an FPGA chip-based system and method for detecting a cable insulation state. A cable insulation state monitoring program is started through a control switch. An FPGA chip generates a detection signal of a digital domain into a first circuit and sends the detection signal to a coupler after the detection signal is amplified by a sending circuit. The coupler injects the detection signal into a to-be-detected cable connected to the coupler. The coupler extracts a reflection signal from the to-be-detected cable. The FPGA chip evaluates the state of the to-be-detected cable according to the reflection signal.

Abstract: An online monitoring method for insulation status of substation utility cables is provided. The method includes that two ends of a to-be-monitored cable are connected to a primary monitoring device and a secondary monitoring device by using a first coupler and a second coupler respectively; and the primary monitoring device and the secondary monitoring device each inject a high-frequency test signal into the to-be-monitored cable, collect a high-frequency reflected signal in the to-be-monitored cable, perform signal processing by using a frequency-domain peak iterative search algorithm, and extract reflection point parameter information, and the insulation aging status of the to-be-monitored cable is determined by integrated monitoring parameter information at two ends of the to-be-monitored cable.