CN203444039U - High-voltage capacitive equipment on-line monitoring system - Google Patents
High-voltage capacitive equipment on-line monitoring system Download PDFInfo
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- CN203444039U CN203444039U CN201320539806.9U CN201320539806U CN203444039U CN 203444039 U CN203444039 U CN 203444039U CN 201320539806 U CN201320539806 U CN 201320539806U CN 203444039 U CN203444039 U CN 203444039U
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Abstract
The utility model relates to a high-voltage capacitive equipment on-line monitoring system. The on-line monitoring system comprises a current sensor, an insulation parameter tester and an industrial control computer. The current sensor is accessed to the industrial control computer through the insulation parameter tester. The utility model provides the high-voltage capacitive equipment on-line monitoring system which can perform real-time on-line monitoring.
Description
Technical field
The utility model belongs to electric power detection field, relates to a kind of high voltage capacitive-type equipment on-line monitoring system, relates in particular to a kind of on-line monitoring system for 110kV and above transformer station capacitive apparatus.
Background technology
With China's power equipment intelligent regeneration, constantly upgrade, high-tension apparatus status monitoring, maintenance aspect continue to use some do not match backward Plant management systems and will progressively eliminate.Therefore, how becoming " scheduled overhaul " into " repair based on condition of component ", is the important topic of power department reform and development.
Utility model content
In order to solve the above-mentioned technical matters existing in background technology, the utility model provides a kind of high voltage capacitive-type equipment on-line monitoring system that can carry out in real time on-line monitoring.
Technical solution of the present utility model is: the utility model provides a kind of high voltage capacitive-type equipment on-line monitoring system, and its special character is: described high voltage capacitive-type equipment on-line monitoring system comprises current sensor, insulation parameter tester and industrial computer; Described current sensor is by insulation parameter tester access industrial computer.
Above-mentioned insulation parameter tester comprises single-chip microcomputer, power supply, A/D converter and storer; Described power supply accesses respectively single-chip microcomputer and A/D converter; Described single-chip microcomputer is connected with A/D converter; Described storer access single-chip microcomputer; Described single-chip microcomputer is connected with industrial computer; Described A/D converter is connected with current sensor.
Above-mentioned single-chip microcomputer is MSP430F149 single-chip microcomputer.
The conversion figure place of above-mentioned A/D converter is not less than 10.
Above-mentioned A/D converter is the A/D converter of 16,6 passage.
Above-mentioned current sensor is magnetic flux centre path current sensor.
Above-mentioned current sensor is the leakage current sensor based on the zero little Principle of Current Mutual Inductance of magnetic flux punching.
The utility model has the advantages that:
The utility model provides a kind of high voltage capacitive-type equipment on-line monitoring system, this system synthesis has been utilized up-to-date in recent years sensor technology, computing machine, the communication technology, the state-of-the-art technologies such as modern artificial intelligence and information processing, under to every index Automatic continuous detected state, variation tendency according to mass data and the apparatus insulated state of tracing analysis, from variation tendency, find dangerous sign, from multinomial testing result relatively comprehensive judgement operational outfit dielectric level and state, and accomplish analysis result to be directly transferred to administrative authority, to power department, realize " repair based on condition of component " necessary condition is provided, that transformer station implements the important technical foundation of repair based on condition of component.The on-line monitoring that can be used for 110kV and above transformer station capacitive apparatus, the object of its monitoring includes the state of insulation of the high-tension apparatuses such as sleeve of main transformer, coupling condenser, current transformer, capacitance type potential transformer, master iron core, lightning arrester.The main project of monitoring has: dielectric loss, and equivalent capacitance, leakage current, current in resistance property, environment temperature, humidity, master iron core ground currents etc., also monitor main transformer magnitude of voltage and frequency simultaneously.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of on-line monitoring system that the utility model provides;
Wherein:
1-current sensor; 2-insulation parameter tester; 3-industrial computer.
Embodiment
Referring to Fig. 1, the utility model provides a kind of high voltage capacitive-type equipment on-line monitoring system, and this high voltage capacitive-type equipment on-line monitoring system comprises current sensor 1, insulation parameter tester 2 and industrial computer 3; Current sensor 1 is by insulation parameter tester 2 access industrial computers 3.
Insulation parameter tester 2 comprises single-chip microcomputer, power supply, A/D converter and storer; Power supply accesses respectively single-chip microcomputer and A/D converter; Single-chip microcomputer is connected with A/D converter; Storer access single-chip microcomputer; Single-chip microcomputer is connected with industrial computer 3; A/D converter is connected with current sensor 1.
Single-chip microcomputer is MSP430F149 single-chip microcomputer; The conversion figure place of A/D converter is not less than 10, especially the A/D converter of 16,6 passage.
Insulation parameter tester 2 is cores of field monitoring unit, and the integral system of this device mainly consists of the monolithic processor controlled data acquisition module of MSP430F149.(1) sequential of MSP430F149 Single-chip Controlling subsystem controls A/D data acquisition and relevant processing capacity, result of calculation leaves in external memory storage the most at last.Monitoring calculation chance regularly sends " data query order " to tester, after MSP430F149 single-chip microcomputer receives orders, the result of data processing is sent to monitoring computer.Communication module is one and take the subsystem that MSP430F149 single-chip microcomputer is core, is mainly responsible for task management and telecommunication management.The querying command that MSP430F149 single-chip microcomputer response monitoring computer is sent, and access MSP430F149 single-chip microcomputer in the mode of interrupting, finally by I/O mouth by the data of I/O by photoelectric conversion module, with the form of radio communication, send monitoring computer to.(2), in order accurately to measure dielectric loss angle, just must guarantee sampling rate and the precision of insulation parameter tester 2.Sampling rate determined by Shannon sampling thheorem, and sampling precision determined by the absolute value index of dielectric loss angle measuring error, if this target setting is 0.001, the A/D of sampling system conversion figure place should be more than 10.What the A/D conversion chip of native system was selected is the A/D conversion chip of two-forty.It is the A/D chip of 16, a 6 passage, control sampling rate able to programme, can realize six Channel Synchronous samplings, therefore can gather three-phase voltage and three-phase current signal simultaneously, guaranteed the consistance in sampling time, the phase displacement error that while having avoided because of difference, sampling causes, has met the requirement of measuring accuracy and the speed of dielectric loss.(3) MSP430F149 single-chip microcomputer subsystem mainly completes discrete Fourier transform (DFT) after the collection control, digital low-pass filtering, windowing of data, proofreaies and correct to insert and calculate, and finally calculate the phase angle difference between current value, frequency values, leakage current and reference voltage, and the monitoring result such as equivalent capacitance.
Current sensor 1 is magnetic flux centre path current sensor 1, is preferably based on the leakage current sensor 1 of the zero little Principle of Current Mutual Inductance of magnetic flux punching.
Magnetic flux centre path current sensor 1 is the inlet device of on-line monitoring system, is also Primary Component, and the quality of its performance directly affects accuracy, the reliability of measuring accuracy and state of insulation analyzing and diagnosing.At present, be usually used in detecting the sensor of high voltage equipment insulation situation still in the majority with current sensor 1.What native system adopted is a kind of leakage current sensor 1 based on the zero little Principle of Current Mutual Inductance of magnetic flux punching.Select the novel crystalline state nanometer core material of high permeability to do unshakable in one's determination, by an O type coil, an I/V translation circuit and one group of amplification compensating circuit, formed, iron core is operated in and approaches desirable zero magnetic flux state, improved the stability of sensor angular difference and ratio, made it meet the requirement of measuring accuracy.Simultaneously, the input current reflecting according to magnetization characteristic and the relation of output current, and the angular difference variation characteristic curve under different temperatures, we pre-deposit in digital signal processor, by the method for software simulation and parameter correction, the object that finally reaches calibration and accurately measure.
Basic functional principle of the present utility model is described below:
Insulation parameter tester 2 obtains leakage current, the reference voltage signal of equipment under test by current sensor 1 and reference source voltage, by calculating, obtain the characteristic parameter of equipment under test insulation characterisitic, these data are delivered to data handling machine by optical cable, high-tension apparatus on-line monitoring analysis software utilizes the phase differential between each equipment end shield electric current and reference source voltage, and the phase differential between PT secondary voltage and reference source voltage, obtain the dielectric loss of equipment under test and other insulation characterisitic parameter; And by mutually relatively and trend analysis principle to surveyed data analysis, comparison, thereby the state of insulation of equipment under test is judged.This system adopts layered distribution type structure, digital communication network, and antijamming capability is strong, has thoroughly solved the problem of dtmf distortion DTMF in signals transmission.
Consider that the hardware circuits such as traditional bridge method, resonance method are complicated, interference free performance is poor, native system adopts take the pure digi-tal method that Fast Fourier Transform (FFT) (FFT) is core, by before FFT to discrete signal windowed function, after FFT, with insertion algorithm, frequency, amplitude and initial phase angle are carried out to correction calculation, ask this signal base wave frequency, amplitude and starting phase angle.The method does not need complicated analog signal processing circuit, and can effectively suppress humorous wave interference.
Claims (7)
1. a high voltage capacitive-type equipment on-line monitoring system, is characterized in that: described high voltage capacitive-type equipment on-line monitoring system comprises current sensor, insulation parameter tester and industrial computer; Described current sensor is by insulation parameter tester access industrial computer.
2. high voltage capacitive-type equipment on-line monitoring system according to claim 1, is characterized in that: described insulation parameter tester comprises single-chip microcomputer, power supply, A/D converter and storer; Described power supply accesses respectively single-chip microcomputer and A/D converter; Described single-chip microcomputer is connected with A/D converter; Described storer access single-chip microcomputer; Described single-chip microcomputer is connected with industrial computer; Described A/D converter is connected with current sensor.
3. high voltage capacitive-type equipment on-line monitoring system according to claim 2, is characterized in that: described single-chip microcomputer is MSP430F149 single-chip microcomputer.
4. high voltage capacitive-type equipment on-line monitoring system according to claim 3, is characterized in that: the conversion figure place of described A/D converter is not less than 10.
5. high voltage capacitive-type equipment on-line monitoring system according to claim 4, is characterized in that: described A/D converter is the A/D converter of 16,6 passage.
6. according to the high voltage capacitive-type equipment on-line monitoring system described in the arbitrary claim of claim 1-5, it is characterized in that: described current sensor is magnetic flux centre path current sensor.
7. high voltage capacitive-type equipment on-line monitoring system according to claim 6, is characterized in that: described current sensor is the leakage current sensor based on the zero little Principle of Current Mutual Inductance of magnetic flux punching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320539806.9U CN203444039U (en) | 2013-08-30 | 2013-08-30 | High-voltage capacitive equipment on-line monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320539806.9U CN203444039U (en) | 2013-08-30 | 2013-08-30 | High-voltage capacitive equipment on-line monitoring system |
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| Publication Number | Publication Date |
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| CN203444039U true CN203444039U (en) | 2014-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320539806.9U Expired - Fee Related CN203444039U (en) | 2013-08-30 | 2013-08-30 | High-voltage capacitive equipment on-line monitoring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954889A (en) * | 2014-04-03 | 2014-07-30 | 贵州电力试验研究院 | Capacitive type device insulation parameter electrification testing method based on pincerlike current sensors |
-
2013
- 2013-08-30 CN CN201320539806.9U patent/CN203444039U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954889A (en) * | 2014-04-03 | 2014-07-30 | 贵州电力试验研究院 | Capacitive type device insulation parameter electrification testing method based on pincerlike current sensors |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140219 Termination date: 20150830 |
|
| EXPY | Termination of patent right or utility model |