OPLC fault location method based on DS evidence theory
A technology of fault location and evidence theory, which is applied in complex mathematical operations and other directions, and can solve problems such as difficult choices for operators in location detection.
Active Publication Date: 2018-04-13
NORTHEAST DIANLI UNIVERSITY +2
View PDF5 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
For the situation where the cable and the optical cable fail at the same location at the same time, the results obtained by using the cable and the optical cable respectively often have certain differences, which makes it difficult for the positioning detection operator to make a choice
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0066] The steps of the present invention are:
[0067] Step 1: Use cables and optical cables to locate faults, obtain location results, and judge whether the location difference is less than a certain threshold d. If so, use this method to improve location accuracy.
[0068] Step 101: This step is a one-time operation and does not need to be performed before each positioning. Take several OPLC samples, set up faults at different locations, use the same type of OPLC detection device to detect the cables and optical cables in the OPLC respectively, statistically analyze the sample data, and obtain the probability density distribution of their respective measurement values.
[0069] Step 102: subtracting the known fault location from the measured data to obtain the respective measurement error distributions
[0070] f d (x,y)=Z d +w d (x,y) (1)
[0071] w d (x,y)=f d (x,y)-Z d (2)
[0072] Among them, f d (x, y) is the distribution of measured value of cable measureme...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present invention provides an OPLC fault location method based on the DS evidence theory, and belongs to the technical field of intelligent grid detection. The purpose of the present invention isto provide an OPLC fault location method based on the DS evidence theory by using the DS evidence theory to fuse the confidence when the cable and the optical cable fail at the same location at the same time, wherein the fused confidence at the peak value is the most likely fault location. The method provided by the present invention is characterized in that: the cable and the optical cable are used to locate the fault so as to obtain a location result, the cable detection and the optical cable detection are used to measure the OPLC fault location so as to obtain true value distribution, and according to the DS evidence theory, confidence data is fused to obtain a fault location interval. The DS evidence theory fusion method provided by the present invention can solve the problem of difficulty of decision-making brought to the inspector due to inconsistent location results between the cable and the optical cable caused by the location error under the condition that the cable detectionalone or the optical cable detection alone cannot detect the fault location accurately when the cable and the optical cable simultaneously fail at the same location, the accuracy of OPLC fault location under this condition can be effectively improved, and uncertainty of determination can be greatly reduced.
Description
Technical field: [0001] The invention belongs to the technical field of smart grid detection. Background technique [0002] Optical Fiber Composite Low-Voltage Cable (OPLC) is a low-voltage power cable and optical unit composite cable, which can provide power and information transmission at the same time. It is suitable for rated voltages of 0.6kV / 1.0kV and below Voltage level. OPLC enables the complex engineering of multiple lines such as electric wires, network cables, telephone lines, and cable TV lines that originally needed to be laid into an integrated construction, which simplifies the installation process and greatly saves line resources and pipeline resources. At the same time, it has informationization, The advantages of automation and interaction will undoubtedly become the mainstream terminal products of "smart grid", which can bring more convenience and modern life style to users. figure 1 It is a typical structure of OPLC. [0003] In practical engineering a...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/18
CPCG06F17/18
Inventor 王鹤熊宇昂葛维春李国庆郭昆亚王振浩罗恒恒周桂平邓伟孔祥余王英杰
Owner NORTHEAST DIANLI UNIVERSITY