Multi-level direct current fault arc detection method based on parameter matching

A fault arc and DC fault technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of optimal matching, no multi-link parameters, and no multi-dimensional goals of DC fault arc detection performance. Ensuring efficiency, improving reliability and speed, and reducing computing resource consumption

CN113298124AActive Publication Date: 2021-08-24XIAN UNIV OF TECH
5 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2021-08-24

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a multi-level direct current fault arc detection method based on parameter matching, and the method comprises the steps: obtaining a system signal in real time, improving the fault arc component proportion through signal filtering processing, then carrying out the fault arc feature analysis and state learning, and using training time as a core evaluation target in the fault arc state identification training process; testing a trained fault arc state identification model, and taking the comprehensive judgment accuracy, the response time, the detection sensitivity and the parameter optimization time of direct current fault arc generation detection through the model as DC fault arc detection performance evaluation targets; adopting a particle swarm optimization to carry out multi-objective optimization, so that multi-link detection parameters in the whole process of direct-current fault arc detection achieve global optimal matching, and the detection effect is cooperatively improved. Therefore, urgent demands of reliable detection of various complex fault arcs caused by multi-noise source interference and operation environment difference in different direct current power supply scenes is dynamically met.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of electrical fault detection, and relates to a DC fault arc detection method, in particular to a multi-dimensional fault arc detection performance evaluation target group constructed by applying a particle swarm optimization algorithm to globally optimize and match the detection parameters of a multi-level classification model, thereby It meets the requirements for accurate detection of various and complex DC fault arcs under the interference of multiple noise sources and different operating environments that can dynamically adapt to application scenarios. Background technique

[0002] The arc fault protection device is one of the core equipments to ensure the safety and reliability of DC power supply. It fundamentally guarantees the reliable operation of the system and the safety of power consumption. It is also one of the bottlenecks restricting the rapid development of DC systems. The "dual carbon" goal ...

Examples

Embodiment Construction

[0038] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. The examples are only used to explain the present invention, not to limit the protection scope of the present invention.

[0039] (1) Accurate detection of multi-level DC fault arc

[0040] The process of accurate detection of multi-level DC fault arc adopted by the present invention is as follows: figure 1 As shown, the specific steps are as follows:

[0041] Step 1. During the operation of the DC system, the fault arc detection hardware samples current signals under normal interference and fault arc conditions of the DC system at a frequency f to form a detection signal data set, and go to step 2;

[0042] The data set considers the interference of power electronic devices, the operation of purely resistive loads, the fault arc current under the condition of long-distance transmission, and the fault arc current under the condition of two-bra...