Live detection system for DC cable leakage current

Abstract

The invention discloses a live detection system for DC cable leakage current. The DC cable leakage current live detection system comprises a micro-current sensor, a difference amplification and filtering module, an A / D module, a DSP control circuit, a display module and a communication module; the micro-current sensor transmits a detected current analog signal to the difference amplification and filtering module; the difference amplification and filtering module generates an amplified analog signal and transmits the amplified analog signal to the A / D module; the A / D module transmits a digital signal to the DSP control circuit; the DSP control circuit processes the digital signal to generate a control signal and a transmission signal; the control signal is fed back to the difference amplification and filtering module; the DSP control circuit displays the transmission signal through the display module; and the DSP control circuit performs communication on the transmission signal through the communication module. The live detection system can effectively and reliably detect an insulation state of a DC cable system and can guarantee power supply safety of a power grid.

Description

technical field [0001] The invention relates to cable insulation detection, in particular to a DC cable leakage current electrification detection system. Background technique [0002] In order to reduce the impact of the greenhouse effect on the climate, the world is developing green energy on a large scale, such as solar energy, wind energy and tidal power generation. DC transmission can connect unstable power sources such as wind power, tidal power, and solar power to the power system without affecting the power quality level of the grid. [0003] HVDC transmission line has low cost, small loss, no reactive power, convenient connection, easy control and adjustment, so it has been widely used in long-distance power transmission. In addition, DC power cable insulation has high working electric field strength, thin insulation thickness, small cable outer diameter, light weight, easy manufacture and installation, large carrying capacity, no AC magnetic field, and has advantag...

AI Technical Summary

Problems solved by technology

Therefore, there is a lack of live detection means for the insulation state of the DC cable system in the prior art. Therefore, it is necessary to propose a DC cable leakage current live detection system based on the structure of the DC cable system, which can effectively and reliably detect the insulation state of the DC cable system. , which is of great significance to ensure the safety of power grid power supply

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