The Control Method of Finding the Fault Quickly
A technology for finding faults and controlling methods, applied in fault locations, measuring devices, instruments, etc., can solve problems such as the difficulty of grounding short-circuit fault points, and achieve the effect of reliable finding process and quick judgment of faulty lines
Inactive Publication Date: 2016-09-14
SHANGHAI UNIVERSITY OF ELECTRIC POWER
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] The present invention is aimed at the problem that it is difficult to detect specific grounding short-circuit fault points, and proposes a control method for quickly finding faults. This method can have high stability, so that the requirements for reliable and fast judgment of fault lines can be realized
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
[0014] The control method for quickly finding faults is to design a controller that can control the closing and opening of multiple circuit breakers, such as figure 1 The schematic diagram of the controller circuit shown in the figure first opens the circuit breakers of all outgoing circuits on the site, and then sends closing signals to the circuit breakers in turn. Each time a circuit breaker is closed, check the voltage transformer installed on the bus. Check whether there is a single-phase ground fault. If so, record it, and then open the circuit that was just closed again, and then close the other circuits one by one, so that all faulty circuits can be found. The controller can be realized by a PLC programmable controller, a single-chip microcomputer, or a microcomputer.
[0015] Such as figure 2 As shown in the flow chart, the specific steps of the control method for quickly finding faults are as follows:
[0016] 1. According to the single-phase short circuit of 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 relates to a control method of rapidly finding fault. The control method of rapidly finding the fault is a control method of finding single-phase earth fault in a 10kV and 35kV neutral point indirect earth system. First, a controller is designed. The controller can control multi-path circuit breakers to switch on and switch off, when finding the fault, circuit breakers of all outgoing return circuits on the spot are switched off, and then sequentially switching signals are sent to the circuit breakers. Every time when one circuit breaker is switched on, a voltage transformer placed on a bus is checked to ensure that whether the ingle-phase earth fault appears or not. If appearing, the single-phase earth fault is recorded, and the circuit switched on before is switched off again, and then other sets of circuits are sequentially switched on, and therefore all circuits with fault are found out. The controller can be achieved through a programmable logic controller (PLC), a single-chip machine and also a microcomputer. In addition, the finding process is very reliable and capable of satisfying requirements of rapidly judging the circuits with fault.
Description
technical field [0001] The invention relates to a method for finding electric power faults, in particular to a control method for quickly finding single-phase ground faults. Background technique [0002] A typical feature of the smart grid is fault finding, location and self-repair functions. But at present our national distribution network 10kV and 35kV can not meet this requirement. When a single-phase ground fault occurs in the distribution network, it is difficult to find the faulty line, but the busbar shows that a certain phase has a ground fault, which requires the staff to go to the site to disconnect the line one by one to check which line A ground short circuit has occurred, which is less efficient and makes the user's power outage longer. There are already many algorithms for fault finding but the accuracy is poor. Contents of the invention [0003] The present invention aims at the problem that it is difficult to detect specific grounding short-circuit fault...
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): H02H7/26G01R31/02G01R31/08
Inventor 淡淑恒吴明惗尤伟任缈小林
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER