Integrated DC solid state power controller and fault decision-making diagnosis method

Abstract

The invention discloses an integrated DC solid state power controller and a fault decision-making diagnosis method. The controller comprises a power board and a digital control board, wherein the power board is mainly responsible for system state detecting, conditioning, signal uploading and SSPC (Solid State Power Controller) driving and protection control; and the digital control board integrates related circuits for arc fault detection and cable fault detection and location, detects a conditioned system state signal based on multiple sensors, completes local fault diagnosis for the conventional SSPC such as fixed-time-lag power supply overvoltage-undervoltage fault protection, BIT self-checking of the SSPC, inverse-time-lag overload protection and additional local fault diagnosis such as system arc fault detection and cable fault detection and location in a concurrent manner in an FPGA main control module, and finally realizes decision-making diagnosis and health management for thesystem state based on a multi-source technology integration technology. The integrated DC solid state power controller can realize the enhanced system fault detection and health management ability, and improves the system safety, reliability, testability and maintenance.

Description

technical field [0001] The invention relates to a comprehensive DC solid-state power controller device and method, belonging to the technical field of power electronics and electric engineering. Background technique [0002] Solid State Power Controller (SSPC for short) is a solid-state power distribution device with a semiconductor power tube as the core, which integrates the switching function of the relay and the protection function of the circuit breaker. SSPC has the advantages of no contact, no arc, no noise, fast response, small electromagnetic interference, long life, high reliability, and easy computer remote control, so it has been widely used in aircraft, ships and vehicle distribution networks . As the core component of the power distribution system, the intelligent switchgear represented by the solid-state power controller can monitor the voltage and current status of the system in real time while realizing contactless on / off of electrical equipment, and real...

AI Technical Summary

Problems solved by technology

[0006] (1) Failure to integrate the increased arc detection and cable positioning function circuits inside the SSPC caused a burden on the volume and weight of the system;

[0007] (2) Any fault mode of the actual system may appear in any component of the system, but this patent only conducts research on the detection and location of arc faults on cables, and it does not have the fault isolation capability of the entire system, including system Detection of failure modes of components such as power supply, power distribution device, connectors, cables, loads, and isolation of fault locations;

[0008] (3) The arc fault detection based on the traditional time-frequency domain method in this patent has the disadvantages of low detection rate, high false alarm rate and high misjudgment rate, and it fails to make full use of the reflection method on cable hard faults or soft faults. detection capability, thus failing to combine these two algorithms to achieve enhanced detection capability of partial failure modes in the system such as open circuit, short circuit, arcing, etc.

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