Intelligent grounding safety parameter monitoring method and device
A technology of safety parameters and grounding devices, which is applied in the field of intelligent grounding safety parameter monitoring and devices, can solve the problems of unspecified upper soil thickness, uncertainty of step current and contact current, etc., and achieve easy movement, accurate and fast evaluation, and operation convenient effect
Inactive Publication Date: 2014-12-03
长沙信长电力科技有限公司
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The permissible values of step voltage and contact voltage in the target formula are directly related to the resistivity of the upper soil, but the thickness of the upper soil is not specified, which brings uncertainty of step current and contact current. Current and touch current are the parameters that directly affect personal safety
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
[0021] figure 1 It is an overall structural diagram of the present invention; figure 2 It is the step voltage and current safety monitoring diagram of the present invention, which is applied to the safety monitoring of step voltage and current of the grounding device; image 3 It is the touch voltage and current safety monitoring diagram of the present invention, which is applied to the measurement of the touch voltage and touch current of the grounding device. When measuring touch voltage and current, the test current should be injected into the grounding device from 1.8m above the electrical equipment shell. When measuring step voltage and step current, the test current should be injected anywhere on the grounding device. According to the regulations DL-475-92 "Guidelines for the Measurement of Power Frequency Characteristic Parameters of Grounding Devices", the measurement of touch voltage should be at a distance of 0.6m from the ground to the power equipment, along the ...
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 invention discloses an intelligent grounding safety parameter monitoring method and device. The intelligent grounding safety parameter monitoring device consists of an adjustable resistance device, a voltage sensor, a current sensor and a computer processing device, and is characterized in that: after grounding testing current is injected into a tested grounding device through a working frequency current generator, the adjustable resistance device is used for simulating the contact resistance and stepping resistance of a human body, the contact voltage and current of tested equipment are acquired through the voltage sensor and the current sensor, and stepping voltage and stepping current are acquired at the interval of 1 meter along different directions. A sampling result is automatically converted into practical grounding short circuit current through the computer processing device, and a potential distribution map at each position and track envelope lines of maximum stepping voltage and current are drawn through calculation. The intelligent grounding safety monitoring device has the characteristics of convenience for using and high practicability.
Description
technical field [0001] The invention mainly relates to a monitoring method and device for safety parameters of grounding devices widely used in power grids, which are used to measure the contact voltage and current value of the grounding device when the power frequency is short-circuited, and the step voltage and current value of the ground near the grounding device, and judge the Whether there is a safety risk and the degree of risk in the grounding device for different groups of people. Background technique [0002] When a grounding short circuit fault occurs in the power system, high touch voltage and touch current will appear on the electrical equipment shell, and step voltage and step current will be generated on the ground of the grounding device. If these parameters are too large, it will endanger personal life Safety, for this reason, the contact voltage and contact current measurement must be carried out on electrical equipment, and the step voltage, step current me...
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 Patents(China)
IPC IPC(8): G01R19/25
Inventor 李景禄郑晖李既明
Owner 长沙信长电力科技有限公司