CN105486944A - Online diagnosis device for tap joint of distribution transformer - Google Patents
Online diagnosis device for tap joint of distribution transformer Download PDFInfo
- Publication number
- CN105486944A CN105486944A CN201510817198.7A CN201510817198A CN105486944A CN 105486944 A CN105486944 A CN 105486944A CN 201510817198 A CN201510817198 A CN 201510817198A CN 105486944 A CN105486944 A CN 105486944A
- Authority
- CN
- China
- Prior art keywords
- circuit
- chip microcomputer
- converter
- diagnostor
- power carrier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
Abstract
The invention discloses an online diagnosis device for a tap joint of a distribution transformer. The diagnosis device comprises a voltage stabilizing circuit, the voltage stabilizing circuit is connected with a signal converter, the output end of the signal converter is connected with an A/D converter, the A/D converter is connected with an isolation circuit, the isolation circuit is connected with a single-chip microcomputer, the output end of the single-chip microcomputer is connected with a display device and the isolation circuit, the isolation circuit is connected with a power carrier wave communication circuit, and the power carrier wave communication circuit is connected with an external AC power supply. On the premise that the power supply system is stable, the most reasonable tap joint is provided; the voltage stabilizing circuit is added before the signal converter, voltage which fluctuates originally is made smooth, it is not required to consider whether there is a power filter capacitor in the surrounding of the diagnosis device, and attenuation of 127kHz high-frequency signals of the power carrier wave module caused by filtering is avoided.
Description
Technical field
The present invention relates to electric system diagnostic techniques field, specifically, relate to a kind of online substation transformer tap diagnostor.
Background technology
In the operation of supply and distribution network huge at present, the existence of variation and the loss of voltage is inevitable phenomenon, but because substation transformer tap selects the unreasonable variation caused excessive, many harmful effects caused to consumer, makes distribution line and consumer produce larger electric energy loss, reduce electrical equipment serviceable life.In order to ensure the voltage levvl on consumer terminal, improve the quality of supply voltage, should reduce variation as far as possible, first best approach is that choose reasonable, adjustment substation transformer tap are to realize the optimization of power supply quality.The selection of traditional substation transformer tap, adjustment are all generally realize by individual technical ability, experience level, so the voltage levvl after adjustment is not only often desirable not to the utmost, and this irrational adjustment or adjust the reliability that also can affect power supply frequently, bring unnecessary loss to distribution enterprise, user.
Summary of the invention
The object of the invention is to the weak point overcoming above-mentioned conventional art, the present invention designs a kind of diagnostor of load tap changer, is used for reducing the loss of voltage, prevents variation by single-chip microcomputer, power carrier communication module.
For solving the problem, the technical solution adopted in the present invention is:
A kind of online substation transformer tap diagnostor, comprise mu balanced circuit, described mu balanced circuit is connected with signal converter, described signal converter output terminal is connected with A/D converter, described A/D converter is connected with buffer circuit, and described buffer circuit is connected with single-chip microcomputer, and described single-chip microcomputer output terminal is connected to display device, buffer circuit, described buffer circuit is connected with power carrier communication module, described power carrier communication module external AC power supply;
Described signal converter built-in voltage sample circuit, voltage signal carries out analog to digital conversion by described A/D converter;
Described voltage sampling circuit adopts linear optical coupling isolating chip TIL300, and input voltage change is converted to curent change;
Described single-chip microcomputer adopts 8 single-chip microcomputer C52;
Described single-chip microcomputer is connected with the power carrier communication module with serial line interface.
One as technique scheme is improved:
The communication interface of described power carrier communication module, carries out man-machine communication by the configuration software on PC.
One as technique scheme is improved:
The communication interface of described power carrier communication module, expansion MODEM communication, network interface card communication.
Owing to have employed technique scheme, compared with prior art, the present invention is that control core makes full use of its abundant software and hardware resources with single-chip microcomputer, is ensureing to provide the most rational tap under the prerequisite that electric power system is stable; The present invention increases mu balanced circuit before signal intensity device, and the voltage of originally fluctuation is become steady, need not consider whether to be connected to around this invention power filtering capacitor and avoid the decay that filtering produces the high-frequency signal of the 127kHz of power line carrier module.
Described mu balanced circuit adopts dissimilar transistor by adjustment VT1, amplifier tube VT2.VT1 PNP pipe; VT2 NPN manages.The stabilivolt comparison bridge that voltage error measurement links is made up of resistance R4, R6 and stabilivolt VD6, VD8 is served as, and its advantage is that measurement sensistivity is high, and output resistance is little, can provide larger base current to amplifier tube, is conducive to improving the precision of voltage regulation.The output voltage of this stabilized voltage supply can with formulae discovery the following: V0=VD6+VD8-Vbc2
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Accompanying drawing explanation
Fig. 1 is a kind of online substation transformer tap diagnostor Unit Design block diagram of the present invention;
Fig. 2 is a kind of online substation transformer tap diagnostor voltage sampling circuit of the present invention;
Fig. 3 is single-chip microcomputer and the power carrier communication model calling circuit diagram of a kind of online substation transformer tap diagnostor of the present invention;
Fig. 4 is the mu balanced circuit figure of a kind of online substation transformer tap diagnostor of the present invention.
In figure: 1-mu balanced circuit; 2-signal intensity device; 3-A/D converter; 4-buffer circuit; 5-single-chip microcomputer; 6-display device; 7-buffer circuit; 8-power carrier communication module.
Embodiment
Embodiment:
As shown in Figure 1, Figure 2, Figure 3, Figure 4, a kind of online substation transformer tap diagnostor, comprise mu balanced circuit 1, described mu balanced circuit 1 is connected with signal converter 2, described signal converter 2 output terminal is connected with A/D converter 3, described A/D converter 3 is connected with buffer circuit 4, described buffer circuit 4 is connected with single-chip microcomputer 5, described single-chip microcomputer 5 output terminal is connected to display device 6, buffer circuit 7, described buffer circuit 7 is connected with power carrier communication module 8, described power carrier communication module 8 external AC power supply.
Described signal converter 2 built-in voltage sample circuit, voltage signal carries out analog to digital conversion by described A/D converter 3.
Described voltage sampling circuit adopts linear optical coupling isolating chip TIL300, and input voltage change is converted to curent change.
Described single-chip microcomputer 5 adopts 8 single-chip microcomputer C52, its timer more than C51, many 4KROM, 256 byte RAM, many interrupt source.Show magnitude of voltage in real time to facilitate observation with charactron, be connected by the power carrier communication module 8 with serial line interface with single-chip microcomputer 5, power carrier communication module 8 is for detecting image data to host computer transmission.
Described single-chip microcomputer 5 is connected with the power carrier communication module 8 with serial line interface.
The communication interface of described power carrier communication module 8, carries out man-machine communication by the configuration software on PC.
The communication interface of described power carrier communication module 8, expansion MODEM communication, network interface card communication.
The function of this invention voltage detecting realizes detecting and Internet Transmission the electrical parameter of each node of distribution network.This invention by mu balanced circuit 1, signal intensity device 2, A D converter 3, buffer circuit 4, single-chip microcomputer 5, display device 6 and the power carrier communication module 8 be connected on power supply form.After this invention collects the voltage signal of distribution network node, after carrying out voltage stabilizing, amplification, filtering, analog to digital conversion and isolation, send into single-chip microcomputer 5, single-chip microcomputer 5 will carry out data communication by power carrier communication module 8 and host computer.
The interface of described power line carrier, PLC module 8, man-machine communication is carried out by the configuration software on PC, even can with RTU or the communication of integrated automation of transformation stations supervisory system, diagnostor action message, real time data and recording parameters etc. are uploaded to watch-dog, also can accept distant place parameter tuning.Meanwhile, MODEM communication or network interface card communication can also be expanded as required, can various requirement be adapted to.
This example has very strong adaptive functional, can hang over the arbitrary node of distribution network, to observe the overall process of the voltage dynamic change of power distribution network and to judge the correctness of control strategy action.This example can be used for the distribution network in different reactive-load compensation situation, diagnostor first carries out the selection of substation transformer tap according to data sampling information, if the fluctuation of voltage sample data is not enough to the tap adjusting transformer, under can ensureing the prerequisite that target side voltage is qualified, as far as possible the reactive-load compensation of capacitor switching is also controlled in a zone of reasonableness.
Claims (6)
1. an online substation transformer tap diagnostor, it is characterized in that: comprise mu balanced circuit (1), described mu balanced circuit (1) is connected with signal converter (2), described signal converter (2) output terminal is connected with A/D converter (3), described A/D converter (3) is connected with buffer circuit (4), described buffer circuit (4) is connected with single-chip microcomputer (5), described single-chip microcomputer (5) output terminal is connected to display device (6), buffer circuit (7), described buffer circuit (7) is connected with power carrier communication module (8), described power carrier communication module (8) external AC power supply,
Described signal converter (2) built-in voltage sample circuit, voltage signal carries out analog to digital conversion by described A/D converter (3);
Described voltage sampling circuit adopts linear optical coupling isolating chip TIL300, and input voltage change is converted to curent change;
Described single-chip microcomputer (5) adopts 8 single-chip microcomputer C52;
Described single-chip microcomputer (5) is connected with the power carrier communication module (8) with serial line interface;
Described mu balanced circuit 1 comprises VT1, amplifier tube VT2, resistance R4, R6 and stabilivolt VD6, VD8.
2. one according to claim 1 online substation transformer tap diagnostor, is characterized in that: the communication interface of described power carrier communication module (8), carries out man-machine communication by the configuration software on PC.
3. one according to claim 2 online substation transformer tap diagnostor, is characterized in that: the communication interface of described power carrier communication module (8), expansion MODEM communication, network interface card communication.
4. one according to claim 1 online substation transformer tap diagnostor, is characterized in that: described mu balanced circuit adopts dissimilar transistor by adjustment VT1, amplifier tube VT2.
5. one according to claim 4 online substation transformer tap diagnostor, is characterized in that: described VT1 PNP pipe; VT2 NPN manages.
6. one according to claim 1 online substation transformer tap diagnostor, is characterized in that: the stabilivolt that described voltage error measurement links is made up of resistance R4, R6 and stabilivolt VD6, VD8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510817198.7A CN105486944A (en) | 2015-11-20 | 2015-11-20 | Online diagnosis device for tap joint of distribution transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510817198.7A CN105486944A (en) | 2015-11-20 | 2015-11-20 | Online diagnosis device for tap joint of distribution transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105486944A true CN105486944A (en) | 2016-04-13 |
Family
ID=55674058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510817198.7A Pending CN105486944A (en) | 2015-11-20 | 2015-11-20 | Online diagnosis device for tap joint of distribution transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105486944A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106530776A (en) * | 2016-12-26 | 2017-03-22 | 海宁泰诺照明电器有限公司 | LED intelligent traffic signal lamp having voltage-stabilizing function |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS582676A (en) * | 1981-06-29 | 1983-01-08 | Fujitsu Ltd | Testing of electricity-light signal converter |
| JP2004120930A (en) * | 2002-09-27 | 2004-04-15 | Nishishiba Electric Co Ltd | Fault detection device of power conversion element |
| CN203352289U (en) * | 2013-06-14 | 2013-12-18 | 国家电网公司 | Transformer on-load switch remote control device |
-
2015
- 2015-11-20 CN CN201510817198.7A patent/CN105486944A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS582676A (en) * | 1981-06-29 | 1983-01-08 | Fujitsu Ltd | Testing of electricity-light signal converter |
| JP2004120930A (en) * | 2002-09-27 | 2004-04-15 | Nishishiba Electric Co Ltd | Fault detection device of power conversion element |
| CN203352289U (en) * | 2013-06-14 | 2013-12-18 | 国家电网公司 | Transformer on-load switch remote control device |
Non-Patent Citations (3)
| Title |
|---|
| 卿太全: "《常用直流稳压电源电路应用200例》", 28 February 2013, 中国电力出版社 * |
| 姚欣: "无触点有载自动调压配电变压器的研究", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
| 张先庭: "《单片机原理、接口与C51应用程序设计》", 31 January 2011, 国防工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106530776A (en) * | 2016-12-26 | 2017-03-22 | 海宁泰诺照明电器有限公司 | LED intelligent traffic signal lamp having voltage-stabilizing function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102880129B (en) | The direct supervising device of a kind of efficiency based on demand response | |
| CN101615847B (en) | Automatic voltage regulator based on electric power electronic transformer | |
| CN202998056U (en) | Pre-emphasis device | |
| CN105186883A (en) | Control method of input-series output-parallel (ISOP) converter system | |
| CN204794099U (en) | Intelligence economize on electricity compensation controller | |
| CN105486944A (en) | Online diagnosis device for tap joint of distribution transformer | |
| CN207677777U (en) | A kind of information record carrier towards digital transformer substation debugging | |
| CN205388628U (en) | Online distribution transformer tap diagnostic apparatus | |
| CN201499090U (en) | Automatic voltage regulation device for power electronic transformer | |
| CN204833664U (en) | Bimodulus is synthesized and is hindered ripples ware | |
| CN202679355U (en) | Voltage stabilizing circuit for frequency modulation interphone | |
| CN201813215U (en) | Intelligent integrated electric energy quality monitoring device | |
| CN201450499U (en) | Field bus access device | |
| CN207866910U (en) | Transforming plant DC power-supply system electric energy quality assessment device | |
| CN206248719U (en) | A kind of high-pressure side DC voltage sampling module of electric power electric transformer | |
| CN205453493U (en) | Soft switch circuit trouble prediction unit of high -frequency resonance | |
| CN204668948U (en) | Electrical network simulator | |
| CN205029665U (en) | Electric carrier system based on non - interconnection direct current circuit | |
| CN204858746U (en) | Electric wire netting real -time monitoring system based on reactive power compensator | |
| CN204012925U (en) | Distribution Network Equipment work condition inspection system | |
| CN204314404U (en) | A kind of aging testing system of frequency converter | |
| CN219577066U (en) | Data access circuit of data acquisition unit | |
| CN202772596U (en) | Three-phase current unbalance compensation system based on capacitive regulation | |
| CN202978287U (en) | Reactive compensation controller based on ATT7022A | |
| CN202651803U (en) | Intelligent capacitor switching device based on wireless data transmission networking |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160413 |