Flexible Rogowski coil used for detecting direct-current system short-circuit current and method for designing same
A Rogowski coil and short-circuit current technology, applied to coils, circuits, measuring devices, etc., can solve the problems of Rogowski coil product failure, enameled wires are easily broken, lack of design methods, etc., and achieve the effect of structural process improvement and mechanical life improvement.
A Rogowski coil and short-circuit current technology, applied to coils, circuits, measuring devices, etc., can solve the problems of Rogowski coil product failure, enameled wires are easily broken, lack of design methods, etc., and achieve the effect of structural process improvement and mechanical life improvement.
CN102436897BInactive Publication Date: 2014-01-29XI AN JIAOTONG UNIV
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[0024] The following is a further detailed description in conjunction with the drawings.
[0025] See figure 1 , The present invention includes a flexible skeleton 2, a coil and a loop 1, an outer insulating sleeve 3, a sampling resistor module 4, and a plug-in interface 5. The coil is evenly wound on the flexible skeleton 2, and the loop loop is embedded in the flexible The geometric center of the skeleton 2, the two ends of the winding are led out after the sampling resistance module 4 through the plug-in interface 5; the whole Rogowski coil forms an open ring, the first and the end are connected through the plug-in interface 5 when in use, and the Rogowski coil leads out the signal Connect with the subsequent integration circuit. In the Rogowski coil loop winding process used in the present invention, the loop and the coil winding itself are composed of one wire. Specifically, the inner core of the silicon rubber cable is removed, and the inside of the cable is sheathed with p...
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The invention discloses a flexible Rogowski coil used for detecting the direct-current system short-circuit current and a method for designing the same, the coil comprises a coil and a loop uniformly wound around an annular flexible framework with an opening, an outer layer insulating bush is sleeved outside the coil and the loop, a plug-type interface attached to the coil and the loop is installed on the opening of the annular flexible framework, the coil outgoing line is connected with a sampling resistance module after being educed through the hole of the plug-type interface, the sampling resistance module educes a signal and is connected with a post-integrating circuit. In the Rogowski coil loop winding technique adopted in the invention, the return wire and the coil winding are constituted by one wire. The head end and the tip end of the Rogowski coil are connected by the plug-type interface, which can improve the mechanical life of the Rogowski coil to a great extent, has the advantages of high reliability and convenience for disassembly and installation; the method for designing the Rogowski coil used for detecting the direct-current system short-circuit current can combine the short circuit physical circumstances and the field working condition of the direct-current system.
Description
Technical field [0001] The invention belongs to an electronic current transformer, and in particular relates to a Rogowski coil used for short-circuit current measurement of a DC system and a design method thereof. Background technique [0002] In order to quickly detect the fault when a short-circuit fault occurs in the DC power system, and to connect with the digital intelligent unit more conveniently to realize digital measurement and protection, the Rogowski coil based on the principle of electromagnetic induction is widely used. [0003] Compared with other transient current detection methods, the skeleton of the hollow Rogowski coil is non-ferromagnetic insulating material. Because it does not contain an iron core, there is no magnetic saturation problem theoretically, and it is almost not limited by the measured current. Very suitable for the measurement of large currents. [0004] In the measurement of large transient currents, the previous measurements based on Rogowski coi...
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Patent Timeline
29 Jan 2014
Publication
CN102436897B
- IPC
- H01F5/02; G01R15/00
- Inventors
- 宋政湘; 王妍