Detection device and detection method for station-dedicated DC power system insulation monitoring device

Abstract

The invention discloses a detection device and a detection method for a station-dedicated DC power system insulation monitoring device. The detection device comprises a DC power unit, an auxiliary DC power unit, and an AC power unit, wherein the DC power unit comprises a first rectifying voltage-regulating module SDC1 and a DC busbar KM1; the auxiliary DC power unit comprises a second rectifying voltage-regulating module SDC2 and an auxiliary DC busbar KM2; the AC power unit comprises an AC voltage regulator T1 and a change-over switch S2; the detection device further comprises a ground insulation testing unit, and a waveform measuring and recording, AC jump and control protection circuit. The detection device has the benefits as follows: mutual jump alarm test, ring network alarm test, AC jump alarm test, balanced bridge AC superimposition resistance test, insulation resistance monitoring, grounding line selection correctness test and other function and performance detection or tests and verifications for the station-dedicated DC power system insulation monitoring device are realized, so as to prevent the improper DC power supply insulation monitoring device from influencing the safe production of a power system.

Description

technical field [0001] The invention relates to a DC power supply system for a power plant step-up station, a substation, a converter station, etc. of a power system, especially a detection device and a detection method for evaluating the parameters and functional performance of a DC power system insulation monitoring device for a station. Background technique [0002] With the development of society and economy, the power load is increasing day by day, the scale of the power system is constantly expanding, and more and more booster stations, substations, converter stations, etc. have been built and put into operation. Since electric power production is completed at one time, the operation safety and reliability of step-up stations, substations, etc. are directly related to power supply and consumption, and the economic losses and The social loss is huge. Station DC power supply system is to provide normal operation power for control, protection, communication and other loa...

AI Technical Summary

Problems solved by technology

However, if the detection method of the insulation monitoring device and the selection of the detection resistor are improper, it will cause the offset and fluctuation of the bus voltage of the DC power system, and in severe cases, it will also affect the operation safety of the station power system and even the power grid.

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