CN109683032A - A kind of feeder automation tester and its output current control method - Google Patents
A kind of feeder automation tester and its output current control method Download PDFInfo
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- CN109683032A CN109683032A CN201710970662.5A CN201710970662A CN109683032A CN 109683032 A CN109683032 A CN 109683032A CN 201710970662 A CN201710970662 A CN 201710970662A CN 109683032 A CN109683032 A CN 109683032A
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- power
- voltage
- output
- operational amplifier
- feeder automation
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 238000012545 processing Methods 0.000 claims description 20
- 238000005070 sampling Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000004065 semiconductor Substances 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 claims description 2
- 230000001737 promoting effect Effects 0.000 claims 1
- 206010037660 Pyrexia Diseases 0.000 abstract description 2
- 230000017525 heat dissipation Effects 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 5
- 238000012360 testing method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011990 functional testing Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/561—Voltage to current converters
Abstract
The present invention provides a kind of feeder automation tester and its output current control method, the system comprises: conversion module, for converting voltages into detection electric current；Power module, for the electric current by conversion module output for external load detection；Control module, for controlling the output voltage of power module according to the voltage at external load both ends.The high reliablity of technical solution instrument and equipment provided by the invention；Power utilization rate improves, and radiator volume-diminished advantageously reduces tester volume and weight；Multiple power output tubes are in parallel, disperse fever more, and heat dissipation difficulty reduces, and can improve power output tube working environment.
Description
Technical field
The invention belongs to feeder line electric automation the field of test technology, and in particular to a kind of feeder automation tester and its defeated
Current control method out.
Background technique
With the fast development of Construction of Intercity Network, electrical power distribution automatization system weight played in power grid security reliability service
It acts on and becoming increasingly conspicuous.The core function of electrical power distribution automatization system is using fault location, isolation and service restoration as the feedback of target
Line automation.When certain point breaks down in distribution network, it will lead to same power supply area and have a power failure, will lead to when situation is serious big
Area has a power failure.Thus, feed line automatization system will cut off fault zone as early as possible, then complete non-faulting region and restore electricity.Feedback
Line automation system will carry out various functional tests before actually investment application to it, and test equipment, which requires to export to exchange, to swash
Electric current is encouraged, electric current is greater than 30A, and carrying load ability is greater than 0.2 ohm.There are carrying load abilities for feeder automation tester at present
Weak problem will lead to current waveform distortion if route is too long.If increasing supply voltage, bringing onto load energy can be improved
Power, but when loading very little or being shorted, the power consumed on power tube is too big, it is necessary to increase very big radiator,
It deals with improperly and is easy to burn out power tube.
Accordingly, it is desirable to provide a kind of feeder automation tester and its output current control method solve the prior art
It is insufficient.
Summary of the invention
In view of the deficiencies of the prior art, the invention proposes a kind of feeder automation tester and its output current control sides
Method.
A kind of feeder automation tester, comprising:
Conversion module, for converting voltages into detection electric current；
Power module, for the electric current by conversion module output for external load detection；
Control module, for controlling the output voltage of power module according to the voltage at external load both ends.
Further, the conversion module includes power output tube and driving circuit；The output end of the driving circuit with
The input terminal of the power output tube connects；Detection electricity of the output end of the power output tube as feeder automation tester
Flow output end.
Further, the power module includes voltage power-adjustable power supply；The voltage power-adjustable power supply passes through function
Electric current of the rate efferent duct output for external load detection.
Further, the control module includes controller；The controller is controlled according to the voltage at external load both ends
The output voltage of voltage power-adjustable power supply processed；The controller passes through driving circuit driving power efferent duct.
Further, further includes: first processing module, at the first control signal for being exported to control module
Reason, generates the control signal of power module；And/or
Second processing module generates driving modulus of conversion for handling the second control signal that control module exports
The driving signal of block；And/or
Third processing module, the Voltage Feedback for back production external load is to control module；And/or
Fourth processing module, for the voltage of sampling resistor to be converted into current feedback to conversion module；
At least one of above four kinds.
Further, the first processing module includes the first digital analog converter and the first operational amplifier；The control
The output end of device is connect with the input terminal of first digital analog converter, the output end of first digital analog converter and described the
The input terminal of one operational amplifier connects, and the output end of first operational amplifier is defeated with the voltage power-adjustable power supply
Enter end connection.
Further, the Second processing module includes the second digital analog converter, low-pass filter and the second operation amplifier
Device；The output end of the controller is connect with the input terminal of second digital analog converter, second digital analog converter it is defeated
Outlet is connect with the input terminal of the low-pass filter, the output end of the low-pass filter and the second operational amplifier
One input terminal connection, the output end of the second operational amplifier are connect with the input terminal of the driving circuit, the driving
The output end of circuit is connect with the input terminal of the power output tube.
Further, the third processing module includes analog-digital converter and third operational amplifier；The external load
It is connect with the input terminal of the third operational amplifier, output end and the analog-digital converter of the third operational amplifier
Input terminal connection, the output end of the analog-digital converter are connect with the controller.
Further, the fourth processing module includes sampling resistor and four-operational amplifier；The sampling resistor
Input terminal is connect with two input terminals of the four-operational amplifier respectively with output end, the four-operational amplifier it is defeated
Outlet is connect with another input terminal of the second operational amplifier.
Further, the power output tube includes the power tube of multiple parallel connections；
The power tube is at least one of metal-oxide-semiconductor, transistor and three of the above of IGBT.
Further, the power module further include: booster power, for by the output of the voltage power-adjustable power supply
Voltage is promoted, and is exported to driving circuit.
A kind of output current control method of feeder automation tester, which comprises
Detection electric current is provided to access the external load of detector, and acquires the voltage at external load both ends in real time；
The voltage of acquisition is converted into feedback signal；
According to the feedback signal, the output of voltage power-adjustable power supply is adjusted；
Output voltage adjusted is adjusted, output detection electric current.
Further, further includes: be adjusted according to driving circuit of the feedback signal to power output tube, to improve
The driving precision of power output tube.
Further, the external load to access detector provides detection electric current, and acquires external load two in real time
The voltage at end includes:
Controller controls voltage power-adjustable power supply by the first digital analog converter and the first operational amplifier, for access
The external load of detector provides detection electric current；
Controller acquires the voltage at outer connecting resistance both ends by third operational amplifier and analog-digital converter.
Further, described according to the feedback signal, the output of voltage power-adjustable power supply is adjusted includes:
For controller according to the feedback signal, controlling voltage by the first digital analog converter and the first operational amplifier can
The output voltage of adjusting power power supply.
Compared with the latest prior art, technical solution provided by the invention has the advantages that
Technical solution provided by the invention promoted feeder automation tester electric current output load capacity on the basis of, when
When load resistance is smaller, power output tube will not generate heat seriously, improve the reliability of instrument and equipment.Meanwhile power utilization rate mentions
Height, radiator volume-diminished advantageously reduce tester volume and weight.In addition, multiple power output tubes are in parallel, make fever more
Bonus point dissipates, and heat dissipation difficulty reduces, therefore can improve power output tube working environment.
Detailed description of the invention
Fig. 1 is hardware circuit schematic diagram of the invention；
Fig. 2 is control logic figure of the invention.
Wherein, 1- voltage power-adjustable power supply；2- booster power；3- power output tube；4- driving circuit；5- controller；
6- load；The first digital analog converter of 7-；The second digital analog converter of 8-；9- sampling resistor；10- analog-digital converter；The first operation of 11-
Amplifier；12- second operational amplifier；13- third operational amplifier；14- four-operational amplifier；15- low-pass filter.
Specific embodiment
The present invention is described in further details with reference to the accompanying drawing.For purpose, the technical solution for making the embodiment of the present invention
Clearer with advantage, following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out
It clearly and completely describes, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
Its embodiment, shall fall within the protection scope of the present invention.
The invention proposes a kind of feeder automation tester and its output current control method, help to improve feeder line certainly
Dynamicization tester electric current exports load capacity, improves power power-supply utilization rate, and does not increase additional heat consumption.
It is structural schematic diagram of the invention as shown in Figure 1.A kind of feeder automation tester includes:
Power module, including voltage power-adjustable power supply 1 and booster power 2, for providing electric energy；
Conversion module, including power output tube 3 and driving circuit 4, the voltage for exporting power supply are converted to detection electricity
Stream；
Control module, including controller 5, for controlling the output of other modules；
First processing module, including the first digital analog converter 7 and the first operational amplifier 11, for being exported to control module
First control signal handled, generate the control signal of power supply；
Second processing module, including the second digital analog converter 8, low-pass filter 15 and second operational amplifier 12, are used for
The second control signal of control module output is handled, the driving signal of driving conversion module is generated；
Third processing module, including analog-digital converter 10 and third operational amplifier 13, the electricity for back production external load
Pressure feeds back to control module；
Fourth processing module, including sampling resistor 9 and four-operational amplifier 14 are used for Current Negative Three-Point Capacitance, realize electric current
It is converted into voltage.
Voltage power-adjustable power supply 1 provides the required energy to load 6 by power output tube 3.It is required that the power supply have it is defeated
The program-controlled function of voltage out can adjust its output voltage according to load voltage in actual motion.
The input of booster power 2 is provided by voltage power-adjustable power supply 1, after boosting 2V or so, is not required and input power electricity
Air bound from.The purpose of boosting is the tube voltage drop up and down of compensation drive circuit 4, improves output voltage capability.Its output is connected to drive
Dynamic circuit 4.
Controller 5 is driven by the second digital analog converter 8, low-pass filter 15, second operational amplifier 12, driving circuit 4
Dynamic power output tube 3 generates electric current in sampling resistor 9, load 6.9 sampled current signals of sampling resistor are through the 4th operation amplifier
14 negative-feedback of device realizes the function of electric current conversion voltage to second operational amplifier 12.
Controller 5 can pass through the output voltage of control line traffic control voltage power-adjustable power supply 1.5 back production of controller load 6
Both end voltage, the foundation as control voltage power-adjustable power supply 1.Purpose be load both end voltage do not cut top under the premise of,
Power output tube supply voltage is reduced as far as possible, and reaching reduces power output tube oneself power consumption, improves its working environment.
Power output tube 3 is that Vce pressure drop can be effectively reduced by multiple parallel connections in the last execution unit of electric current output,
Promote output voltage capability, i.e. carrying load ability.
It is control logic flow chart of the invention as shown in Figure 2.Controller controls power power-supply and exports ceiling voltage, then
Normal output current signal, then by load voltage back production sees whether load voltage has and small cuts top.If without it is small cut top if
Reduce power power-supply output voltage, if there is it is small cut top then return continue to test.
A kind of output current control method for feeder automation tester, comprising the following steps:
Detection electric current is provided to access the external load of detector, and acquires the voltage at external load both ends in real time；
The voltage of acquisition is converted into feedback signal；
According to the feedback signal, the output of voltage power-adjustable power supply is adjusted；
Output voltage adjusted is adjusted, output detection electric current.
It is adjusted according to driving circuit of the feedback signal to power output tube, to improve the driving of power output tube
Precision.
1) controller 5 can Power Regulation by the first digital analog converter 7, the first operational amplifier 11 output Analog control voltage
Rate power supply 1 makes it export ceiling voltage.
2) controller 5 exports analog quantity by the second digital analog converter 8, by low-pass filter 15, the second operation amplifier
Device 12,4 driving power efferent duct of driving circuit, 3 output current signal.
3) sampled current value of sampling resistor 9 is converted into analog voltage amount by four-operational amplifier 14 and is superimposed upon
On two operational amplifiers 12, Current Negative Three-Point Capacitance is formed, realizes the function of voltage switching current.
4) voltage value of load 6 passes through 13 back production of third operational amplifier, then is converted to digital letter through analog-digital converter 10
Number, into controller 5.
5) controller 5 adjusts function by the first digital analog converter 7, the first operational amplifier 11 according to the voltage value of load 6
The output voltage of rate power supply 1 enables output voltage=load voltage+Δ V, and Δ V is equal to 3V or so here.
6) in view of prime driving can bring pressure drop, the output voltage of power power-supply 1 is promoted 2V or so by booster power 2,
Driving circuit 4 is given again.Example: power power-supply is ± 15V, then prime driving voltage needs ± 17V.
7) when power output tube is when exporting larger current, Vce pressure drop is larger, by more power output tube parallel connections,
Single efferent duct current-carrying capacity reduces, and Vce pressure drop becomes smaller；Either power output tube can also use metal-oxide-semiconductor, and tube voltage drop is more
Low, Δ V can use 2.5V or so, therefore can improve output voltage capability, i.e. carrying load ability.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, to the greatest extent
Invention is explained in detail referring to above-described embodiment for pipe, it should be understood by those ordinary skilled in the art that: still
It can be with modifications or equivalent substitutions are made to specific embodiments of the invention, and without departing from any of spirit and scope of the invention
Modification or equivalent replacement, are intended to be within the scope of the claims of the invention.
Claims (15)
1. a kind of feeder automation tester characterized by comprising
Conversion module, for converting voltages into detection electric current；
Power module, for the electric current by conversion module output for external load detection；
Control module, for controlling the output voltage of power module according to the voltage at external load both ends.
2. a kind of feeder automation tester as described in claim 1, which is characterized in that the conversion module includes that power is defeated
Outlet pipe and driving circuit；The output end of the driving circuit is connect with the input terminal of the power output tube；The power output
Detection current output terminal of the output end of pipe as feeder automation tester.
3. a kind of feeder automation tester as claimed in claim 2, which is characterized in that the power module includes that voltage can
Adjusting power power supply；Electric current of the voltage power-adjustable power supply by power output tube output for external load detection.
4. a kind of feeder automation tester as claimed in claim 3, which is characterized in that the control module includes control
Device；The controller controls the output voltage of voltage power-adjustable power supply according to the voltage at external load both ends；The control
Device passes through driving circuit driving power efferent duct.
5. a kind of feeder automation tester as described in Claims 1-4 any one, which is characterized in that further include: first
Processing module generates the control signal of power module for handling the first control signal that control module exports；With/
Or,
Second processing module generates driving conversion module for handling the second control signal that control module exports
Driving signal；And/or
Third processing module, the Voltage Feedback for back production external load is to control module；And/or
Fourth processing module, for the voltage of sampling resistor to be converted into current feedback to conversion module；
At least one of above four kinds.
6. a kind of feeder automation tester as claimed in claim 5, which is characterized in that
The first processing module includes the first digital analog converter and the first operational amplifier；
The output end of the controller is connect with the input terminal of first digital analog converter, first digital analog converter it is defeated
Outlet is connect with the input terminal of first operational amplifier, and the output end and the voltage of first operational amplifier are adjustable
The input terminal of power power-supply connects.
7. a kind of feeder automation tester as claimed in claim 5, which is characterized in that the Second processing module includes the
Two digital analog converters, low-pass filter and second operational amplifier；
The output end of the controller is connect with the input terminal of second digital analog converter, second digital analog converter it is defeated
Outlet is connect with the input terminal of the low-pass filter, the output end of the low-pass filter and the second operational amplifier
One input terminal connection, the output end of the second operational amplifier are connect with the input terminal of the driving circuit, the driving
The output end of circuit is connect with the input terminal of the power output tube.
8. a kind of feeder automation tester as claimed in claim 5, which is characterized in that the third processing module includes mould
Number converter and third operational amplifier；The external load is connect with the input terminal of the third operational amplifier, and described
The output end of three operational amplifiers is connect with the input terminal of the analog-digital converter, the output end of the analog-digital converter with it is described
Controller connection.
9. a kind of feeder automation tester as claimed in claim 5, which is characterized in that the fourth processing module includes adopting
Sample resistance and four-operational amplifier；The input terminal of the sampling resistor and output end respectively with the four-operational amplifier
Two input terminal connections, the output end of the four-operational amplifier and another input terminal of the second operational amplifier connect
It connects.
10. a kind of feeder automation tester as claimed in claim 2, which is characterized in that the power output tube includes more
The power tube of a parallel connection；
The power tube is at least one of metal-oxide-semiconductor, transistor and three of the above of IGBT.
11. a kind of feeder automation tester as claimed in claim 3, which is characterized in that the power module further include: rise
Voltage source is exported for promoting the output voltage of the voltage power-adjustable power supply to driving circuit.
12. a kind of output current control method of feeder automation tester, which is characterized in that the described method includes:
Detection electric current is provided to access the external load of detector, and acquires the voltage at external load both ends in real time；
The voltage of acquisition is converted into feedback signal；
According to the feedback signal, the output of voltage power-adjustable power supply is adjusted；
Output voltage adjusted is adjusted, output detection electric current.
13. a kind of output current control method for feeder automation tester as claimed in claim 12, feature exist
In, further includes: it is adjusted according to driving circuit of the feedback signal to power output tube, to improve the drive of power output tube
Dynamic precision.
14. a kind of output current control method for feeder automation tester as claimed in claim 12, feature exist
In the external load to access detector provides detection electric current, and the voltage for acquiring external load both ends in real time includes:
Controller controls voltage power-adjustable power supply by the first digital analog converter and the first operational amplifier, for access detection
The external load of instrument provides detection electric current；
Controller acquires the voltage at outer connecting resistance both ends by third operational amplifier and analog-digital converter.
15. a kind of output current control method for feeder automation tester as claimed in claim 12, feature exist
In, it is described according to the feedback signal, the output of voltage power-adjustable power supply is adjusted includes:
For controller according to the feedback signal, voltage is controlled by the first digital analog converter and the first operational amplifier can Power Regulation
The output voltage of rate power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710970662.5A CN109683032A (en) | 2017-10-18 | 2017-10-18 | A kind of feeder automation tester and its output current control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710970662.5A CN109683032A (en) | 2017-10-18 | 2017-10-18 | A kind of feeder automation tester and its output current control method |
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| Publication Number | Publication Date |
|---|---|
| CN109683032A true CN109683032A (en) | 2019-04-26 |
Family
ID=66183761
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710970662.5A Pending CN109683032A (en) | 2017-10-18 | 2017-10-18 | A kind of feeder automation tester and its output current control method |
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| Country | Link |
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| CN (1) | CN109683032A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110927420A (en) * | 2019-11-25 | 2020-03-27 | 国网宁夏电力有限公司电力科学研究院 | Current and voltage regulation and control system for feeder automation test |
| CN110988527A (en) * | 2019-11-25 | 2020-04-10 | 国网宁夏电力有限公司电力科学研究院 | Feeder automation testing device and using method thereof |
-
2017
- 2017-10-18 CN CN201710970662.5A patent/CN109683032A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110927420A (en) * | 2019-11-25 | 2020-03-27 | 国网宁夏电力有限公司电力科学研究院 | Current and voltage regulation and control system for feeder automation test |
| CN110988527A (en) * | 2019-11-25 | 2020-04-10 | 国网宁夏电力有限公司电力科学研究院 | Feeder automation testing device and using method thereof |
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