CN202133726U

CN202133726U - Insulator detector based on medium response

Info

Publication number: CN202133726U
Application number: CN201120179718U
Authority: CN
Inventors: 秦家远; 黄发富; 万望龙
Original assignee: Electric Power Research Institute of State Grid Hunan Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; Electric Power Research Institute of State Grid Hunan Electric Power Co Ltd
Priority date: 2011-05-31
Filing date: 2011-05-31
Publication date: 2012-02-01
Anticipated expiration: 2021-05-31

Abstract

An insulator detector based on medium response is composed of a high voltage unit (1), a switch unit (2), a measuring unit (3) and a processing unit (4), wherein the high voltage unit (1) is composed of an AC-DC conversion module (11), a high voltage inversion unit (12) and a high voltage output unit (13) serially connected; the measuring unit (13) is composed of a sampling unit (30), a first pre-stage processing module (31), an insulating resistor measuring unit (34), a second pre-stage processing module (32), a recovery voltage measuring unit (35), a third pre-stage processing module (33) and a polarization / depolarization current measuring unit (36) serially connected; and the processing unit (4) is composed of a DSP unit (41) and a man-machine communication unit (42) serially connected. The insulator detector is excellent in insulator aging detection effect, small in volume, light in weight and simple in wiring, and can conveniently and effectively detect the internal insulating deterioration of an oil-paper insulating transformer.

Description

A kind of insulator detector based on dielectric response

Technical field

The utility model relates to a kind of pick-up unit, relates in particular to a kind of insulator detector based on dielectric response.

Background technology

Transformer is provided with and generally is no more than 30 years tenure of use, but how therefore the phenomenon ubiquity that extends service in the army in the reality, hold the health status of these old transformers, and the insulation ag(e)ing degree of assessing them is very crucial problem.The transformer of paper oil insulation structure wherein, oil can be changed regeneration in operational process, and insulating paper is in case aging irreversible.The effective method of judging at present whether insulating paper wear out is that the degree of polymerization to insulating paper detects; But need hang the cover transformer owing to take out insulating paper; Workload is big, and the pattern dispersion, so difficulty of test is big; Need seek out a kind of easy detection means, analyze accurately and judge with whether aging the making of convenient insulating paper to transformer.

The utility model content

The technical matters that the utility model will solve is that the defective to prior art exists provides a kind of insulator detector based on dielectric response.Use this detector to carry out insulation resistance, return voltage, polarization/depolarization current and carry out Function detection the paper oil insulation transformer.

The technical solution of the utility model is; Referring to accompanying drawing 1; A kind of insulator detector of this that is provided based on dielectric response; As shown in Figure 1ly be composed in series by a high voltage unit 1, switch element 2, measuring unit 3 and a processing unit 4, wherein said high voltage unit 1 changes DC module 11, high-voltage inverted unit 12, high pressure output unit 13 by AC and is composed in series; Said switch element 2, (English full name is " INSULATED GATA BIPOLAR TRANSISTOR ", and Chinese translation is " an insulated gate bipolar transistor npn npn " by high pressure, at a high speed IGBT.) switching device K1, IGBT switching device K2, IGBT switching device K3 and IGBT switching device K4 be composed in series; Said measuring unit 3 is composed in series by sampling unit 30, the first prime processing module 31, insulation measurement unit 34, the second prime processing module 32, recovery voltage measuring unit 35, the 3rd prime processing module 33, polarization/depolarization current measuring unit 36; (English full name is " DIGITAL SIGNAL PROCESSING " to said processing unit 4, and Chinese translation is " digital signal processing " by DSP.) unit 41 is composed in series with man-machine communication unit 42, said DSP unit 41 is carried out both-way communication between the two with man-machine communication unit 42.

The principle of work of the utility model that constitutes thus is; Said high voltage unit 1 send AC to change the DC module by civil power 220V; Send high-voltage inverted unit after becoming DC voltage; High-voltage inverted unit becomes the pulsation AC signal behind DC chopped-wave, become the high-pressure pulsating AC signal through step-up transformer again and give the high pressure output unit, and high-voltage rectifying is carried out in the high-pressure pulsating interchange to the high pressure output unit and hv filtering is treated as level and smooth high-voltage dc signal; As switching device, by its action of FPGA timing controlled, the response time is the nS level to said switch element by a plurality of high pressure, at a high speed IGBT.Measuring-signal is taken from switch element, handles through prime, send and measures the loop.This instrument major loop and control loop electrical isolation, digital signal transfers, layering is installed, and has strengthened antijamming capability, has improved stability and reliability.

The beneficial effect of the utility model is; Set insulation resistance, return voltage, three kinds of insulation of polarization/depolarization current measuring ability effectively detect insulation status; Particularly respond well to the aging detection of insulator, and volume is little, and in light weight; The site test wiring is simple, can be easily the built-in electrical insulation deterioration of paper oil insulation transformer be effectively detected.

Description of drawings

Fig. 1 is the structured flowchart of a specific embodiment of the utility model;

Being denoted as among above Fig. 1:

The 1-high voltage unit,

11-AC changes the DC module,

The high-voltage inverted unit of 12-,

13-high pressure output unit,

The 2-switch element,

The 3-measuring unit,

The 30-sampling unit,

The 31-first prime processing module,

The 32-second prime processing module,

33-the 3rd prime processing module,

34-insulation measurement unit,

35-recovery voltage measuring unit,

36-polarization/depolarization current measuring unit,

The 4-processing unit,

The 41-DSP unit,

42-man-machine communication unit.

Embodiment

Referring to accompanying drawing 1; A kind of insulator detector of this embodiment of the utility model based on dielectric response; As shown in Figure 1ly be composed in series by high voltage unit 1, switch element 2, measuring unit 3 and processing unit 4, high voltage unit 1 wherein changes DC module 11, high-voltage inverted unit 12, high pressure output unit 13 by AC and is composed in series; Wherein AC changes DC module 11 employing Hunan China province Changsha three friendly instrument and equipment AC that company limited produces and changes the DC modules; High-voltage inverted unit 12 adopts Hunan China province Changsha three friendly instrument and equipment high-voltage inverters that company limited produces; High pressure output unit 13 adopts the reverse exciting topological structure of Hunan China Changsha of provinceing three friendly instrument and equipment company limited production and the high pressure output transformer of high frequency modulation mode.

Switch element 2; IGBT switching device K1, IGBT switching device K2, IGBT switching device K3 and IGBT switching device K4 by high pressure, high speed are composed in series, and it is the commercially available insulated gate bipolar transistor npn npn IGBT switch of nS level that said IGBT switching device K1, IGBT switching device K2, IGBT switching device K3 and IGBT switching device K4 all adopt the response time;

Measuring unit 3 is composed in series by sampling unit 30, the first prime processing module 31, insulation measurement unit 34, the second prime processing module 32, recovery voltage measuring unit 35, the 3rd prime processing module 33, polarization/depolarization current measuring unit 36 successively.Sampling unit 30 wherein adopts Hunan China province Changsha three friendly instrument and equipment company limited to produce SYCY-1 type sampling thief; The SYMK-01 type processing module that the first prime processing module 31, the second prime processing module 32, the 3rd prime processing module 33 all adopt Hunan China province Changsha three friendly instrument and equipment company limited to produce; Insulation measurement unit 34 adopts the SYCL-11 type insulation measurement module of Hunan China Changsha of provinceing three friendly instrument and equipment company limited production; The SYHF-12 type recovery voltage measurement module that recovery voltage measuring unit 35 adopts Hunan China province Changsha three friendly instrument and equipment company limited to be produced; And polarize/SYJH-13 type polarization/depolarization current measurement module that depolarization current measuring unit 36 adopts Hunan China province Changsha three friendly instrument and equipment company limited to be produced.

Processing unit 4 is composed in series by man-machine communication unit 41 and DSP unit 42, the CXA-L10A type man-machine communication module that 41 employings BeiJing, China, man-machine communication unit wherein-company of De Bike Creative Science and Technology Co. Ltd produces; The TMS320f2812 type DSP module that " DSP unit 42 " adopts TIX to produce, man-machine communication unit 41 and DSP unit 42 be both-way communication between the two.Consider that main circuit voltage is high; The moment impact electric current is big; Electric field disturbs strong, causes measuring inaccurate easily and master control digital signal processing generation misoperation, and the connected mode between the high-tension major loop of present embodiment and the control loop of low-voltage adopts conventional electrical isolation optical fiber connected mode; Signal transfer mode between the control loop of this high-tension major loop and low-voltage adopts conventional digital signal transfers mode; The mounting means of the control loop of this high-tension major loop and low-voltage adopts conventional digital-to-analogue photoelectricity layering mounting means on physical construction, strengthen the antijamming capability of present embodiment thus effectively, improves the stability and the reliability of present embodiment.

Claims

1. insulator detector based on dielectric response; It is characterized in that; It is composed in series by a high voltage unit (1), switch element (2), measuring unit (3) and a processing unit (4), and wherein said high voltage unit (1) is composed in series by AC commentaries on classics DC module (11), high-voltage inverted unit (12), high pressure output unit (13); Said switch element (2) is composed in series by IGBT switching device (K1), IGBT switching device (K2), IGBT switching device (K3) and IGBT switching device (K4); Said measuring unit (3) is composed in series by sampling unit (30), the first prime processing module (31), insulation measurement unit (34), the second prime processing module (32), recovery voltage measuring unit (35), the 3rd prime processing module (33), polarization/depolarization current measuring unit (36); Said processing unit (4) is composed in series by DSP unit (41) and man-machine communication unit (42).