CN107276094A - 400V distribution system main switches gear adjusts controller and its adjustment control method - Google Patents
400V distribution system main switches gear adjusts controller and its adjustment control method Download PDFInfo
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- CN107276094A CN107276094A CN201710618359.9A CN201710618359A CN107276094A CN 107276094 A CN107276094 A CN 107276094A CN 201710618359 A CN201710618359 A CN 201710618359A CN 107276094 A CN107276094 A CN 107276094A
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- main switch
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- switching control
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000005259 measurement Methods 0.000 claims abstract description 5
- 238000005070 sampling Methods 0.000 claims description 18
- 238000001514 detection method Methods 0.000 claims description 17
- 230000009471 action Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/04—Circuit arrangements for ac mains or ac distribution networks for connecting networks of the same frequency but supplied from different sources
- H02J3/08—Synchronising of networks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
- G01R19/16547—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies voltage or current in AC supplies
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
400V distribution systems main switch gear regulation controller and its adjustment control method of the present invention are related to the regulation control of 400V distribution system main switches gear, and the special equipment and adjustment control method of problem is set and controlled in main switch overload electric current definite value when more particularly to solution load change is larger.Including current ration setup unit, current acquisition unit, alarm indication unit, switching control unit and CPU；The CPU is connected with current ration setup unit, current acquisition unit, alarm indication unit and switching control unit respectively；The present invention can carry out the setting of main switch primary current definite value in the case where system is not powered off, and according to actual measurement primary current and the relation of bound threshold value, by switching control unit controlling switch switching, can effectively solve load change it is larger when main switch overload electric current definite value offering question.
Description
Technical field
400V distribution systems main switch gear regulation controller and its adjustment control method of the present invention are related to 400V power distribution systems
Main switch gear regulation of uniting is controlled, and main switch overload electric current definite value is set and controlled when more particularly to solution load change is larger
The special equipment and adjustment control method of problem.
Background technology
It are furnished with the 400V panel switches of huge number in numerous cells or rural power distribution system at present, by seasonality
Or red-letter day property influence load can be varied widely, the selection switched in actual motion be present " two-not-depend ", i.e. load weight
When highlight contact capacity not enough, because switch load configuration amount occurs in load reduction after seasonal or red-letter day property load
More than the situation of actual load.Current solution mainly configures switch according to the maximum upper limit of load, but above and below giving
The definite value mating band of level switch comes difficult, the difficult situation of low load with strong power occurs.Further switch primary current need to such as be determined
Value adjustment then needs excision to switch, and causes load to power off.Thus it is badly in need of that main switch can be carried out in the case where guarantee system is not powered off
The special equipment being set and controlled and corresponding adjustment control method of overload electric current definite value.
The content of the invention
The purpose of the present invention is to provide a kind of 400V distribution systems main switch gear regulation control for above-mentioned weak point
Device and adjustment control method；The present invention can carry out the setting of main switch primary current definite value in the case where guarantee system is not powered off,
And primary current and the relation of bound threshold value according to actual measurement, by switching control unit controlling switch switching, can effectively it solve
The offering question of main switch overload electric current definite value when load change is larger.
The present invention takes following technical scheme to realize：
400V distribution system main switches gear adjusts controller, including current ration setup unit, current acquisition unit, alarm are aobvious
Show unit, switching control unit and CPU；The CPU respectively with current ration setup unit, electric current
Collecting unit, alarm indication unit are connected with switching control unit；
The current ration setup unit includes button group, and the button group is connected structure with CPU CPU
Into button measure loop；
The alarm indication unit connects and composes alarm indication loop with CPU；
The switching control unit connects and composes switching control loop with CPU.
The current ration setup unit is used to set the main switch overload electric current definite value stored in CPU
It is fixed.
The current acquisition unit is used to being converted to main switch primary current into the digital quantity for CPU computing.
The CPU uses commercially available cpu chip.
The alarm indication unit is used for when the out-of-limit alarm of main switch primary current is shown.
Whether the switching control unit is out-of-limit with fling-cut switch according to main switch primary current.
The current acquisition unit is adopted including current transformer, voltage transformer, signal conditioner, frequency tracker and AD
Sample chip, wherein:
The current transformer connects and composes current detection circuit with main switch inlet wire；
The voltage transformer connects and composes voltage detection circuit with main switch inlet wire；
The signal conditioner first input end is connected with the current detection circuit output end, the input of signal conditioner second
It is connected with the voltage detection circuit output end；
The frequency tracker input is connected with the voltage detection circuit output end, frequency tracker output end and centre
Manage unit connection；
The AD sampling A/D chips first input end connects the signal conditioner output end, the input of analog-digital converter second and center
Processing unit is connected, and AfD converter output is connected with CPU.
Further, the frequency tracker includes band-pass filter, comparator and optocoupler, bandpass filter input
End is connected with the voltage detection circuit output end, and the comparator input terminal is connected with bandpass filter output end, the light
Coupling input is connected with comparator output terminal, and the output end of optocoupler is connected with CPU.
400V distribution system main switches gear adjusts the control method of controller, comprises the following steps：
1）Main switch overload electric current definite value is set by current ration setup unit；
2）Main switch primary current is converted to the digital quantity for CPU computing by current acquisition unit in real time；
3）CPU carries out computing to the digital quantity that sampling is obtained and obtains main switch primary current measured value；
4）The main switch primary current value that measurement is obtained is compared by CPU with overload electric current definite value；
4-1）When main switch primary current measured value is more than or equal to overload electric current definite value, central processing unit controls alarm indication
Charactron flicker in unit, while alarm equipment alarm, while central processing unit controls switching control unit sends effective letter
Number make auxiliary reclay action so as to connect control loop, switch trip realizes switch motion；
4-2）Do not dodged when main switch primary current measured value is less than the charactron in overload electric current definite value, alarm indication unit
Bright, alarm is not alarmed, and switching control unit is failure to actuate.
The present invention uses above-mentioned technical proposal, has the advantages that：Pass through frequency tracker real-time tracking power network frequency
Rate, and according to the frequency dynamic sampling rate adjusting of power network to realize the synchronized sampling of power network current signal so that current measurement
Precision it is higher；Current ration setting is isolated with primary circuit, it is ensured that what Field Force's personal safety and system were not powered off
In the case of, carry out main switch primary current definite value and set, it is more flexible and convenient.
Brief description of the drawings
Fig. 1 is the structured flowchart that 400V distribution systems main switch gear of the present invention adjusts controller；
Fig. 2 is the structured flowchart of the current acquisition unit of the present invention；
Fig. 3 is connected electrical principle with AD sampling A/D chips for the cpu chip of the present invention and implements illustration；
Fig. 4 implements illustration for the AD sampling A/D chip peripheral electricals principle of the present invention.
Embodiment
Technical scheme is described in detail below in conjunction with the accompanying drawings：
As shown in figure 1,400V distribution system main switches gear regulation controller includes current ration setup unit, alarm indication list
Member, switching control unit, CPU and current acquisition unit.The CPU connects the current ration setup unit, electric current and adopted respectively
Collect unit, alarm indication unit, switching control unit.The current ration setup unit is used for fixed to main switch overload electric current
Value setting, the current acquisition unit is used to being converted to main switch primary current into the digital quantity for supplying CPU computings, and the alarm shows
Show that unit is used for when the out-of-limit alarm of main switch primary current is shown, the switching control unit is according to main switch primary current
It is no out-of-limit with fling-cut switch.
As shown in Fig. 2 dotted line frames, current acquisition unit includes current transformer, voltage transformer, signal conditioner, frequency
Tracker and AD sampling A/D chips.The current transformer connects and composes current detection circuit with main switch inlet wire.The voltage is mutual
Sensor connects and composes voltage detection circuit with main switch inlet wire.The signal conditioner first input end is returned with the current detecting
Road output end connection, the input of signal conditioner second is connected with the voltage detection circuit output end.The frequency tracker
Input is connected with the voltage detection circuit output end, and frequency tracker output end is connected with the cpu chip.The AD is adopted
Sample chip first input end connects the signal conditioner output end, the input termination of analog-digital converter second cpu chip, modulus
Converter output end connects the cpu chip.
Frequency tracker includes：Bandpass filter, comparator, optocoupler, wherein the bandpass filter input with it is described
Voltage detection circuit output end is connected, and the comparator input terminal connects the bandpass filter output end, the optocoupler input
The comparator output terminal is connect, the output of optocoupler connects the cpu chip.Bandpass filter filter out in ac voltage signal harmonic wave into
Point, comparator is converted to square wave by the voltage signal after harmonic components is filtered out, and the isolation on analog- and digital- ground is realized by optocoupler.
The output of optocoupler connects CPU capturing units, and the square-wave signal triggering CPU captures of optocoupler output are interrupted, obtain the line voltage cycle, enter
And the synchronous sampling control signal for exporting AD sampling A/D chips is calculated by CPU.
As shown in figure 3, cpu chip is connected electrical schematic diagram with AD sampling A/D chips, the cpu chip is what TI companies produced
Floating-point DSP 28335, the AD sampling A/D chips produce AD7606 using Analog device companies, and the chip is 16 AD cores
Piece, at most can be achieved the synchro measure of 8 analog channels.
As shown in figure 4, AD7606 sampling A/D chip peripheral electrical schematic diagrams.
The local deterministic process of alarm indication unit and switching control unit of the present invention is exemplified below：
if (TEN_CYC_CNT_FLAG==1)
{
Cal_Ten_Cyc_Rms( );
display ( I_DIS , float_to_dis( IA_Rms ));
display ( U_DIS , float_to_dis( UA_Rms ));
If (IA_Rms>CURRENT_ALARM)
{
spi_xmit(DIG_BLINK_CLT_L,CURRENT_FLASH1);// flicker alarm
spi_xmit(DIG_BLINK_CLT_H,CURRENT_FLASH2);
switch_off( );The excision of // switch
}
else
{
spi_xmit(DIG_BLINK_CLT_L,00);// do not flash
spi_xmit(DIG_BLINK_CLT_H,00);
}
}
The main switch primary current definite value that current ration setup unit is set is CURRENT_ALARM.Current transformer is opened master
Close primary current and carry out linear transformation, signal conditioner is transmitted after amplifying to transformer secondary current signal to AD7606 sampling cores
Piece, frequency tracker real-time tracking main switch primary voltage frequency is calculated by DSP28335 capturing units and obtains and export synchronization
Sampling control signal is sampled, and DSP28335 chips do data processing to AD7606 sampling A/D chip output quantities, obtain main switch
Primary current value IA_Rms.Work as IA_Rms>During CURRENT_ALARM, the flicker alarm of alarm indication unit then passes through swich_
Off functions control switching control unit, which sends useful signal, acts auxiliary reclay, so as to connect control loop, switch is jumped
Lock, realizes switch motion.
In summary, the present invention can carry out the setting of main switch primary current definite value, and root in the case where system is not powered off
The primary current and the relation of bound threshold value factually surveyed, by switching control unit controlling switch switching, can effectively solve load
The offering question of main switch overload electric current definite value when changing larger.
Claims (7)
1. a kind of 400V distribution systems main switch gear adjusts controller, it is characterised in that：Including current ration setup unit, electricity
Flow collecting unit, alarm indication unit, switching control unit and CPU；The CPU respectively with electric current
Definite value setup unit, current acquisition unit, alarm indication unit are connected with switching control unit；
The current ration setup unit includes button group, and the button group is connected structure with CPU CPU
Into button measure loop；For being set to the main switch overload electric current definite value stored in CPU；
The alarm indication unit connects and composes alarm indication loop with CPU；For being got over when main switch primary current
Alarm indication in limited time；
The switching control unit connects and composes switching control loop with CPU.
2. 400V distribution systems main switch gear according to claim 1 adjusts controller, it is characterised in that：The center
Processing unit uses cpu chip.
3. 400V distribution systems main switch gear according to claim 1 adjusts controller, it is characterised in that：The electric current
Collecting unit is used to being converted to main switch primary current into the digital quantity for CPU computing.
4. 400V distribution systems main switch gear according to claim 1 adjusts controller, it is characterised in that：The switching
Whether control unit is out-of-limit with fling-cut switch according to main switch primary current.
5. 400V distribution systems main switch gear according to claim 1 adjusts controller, it is characterised in that：The electric current
Collecting unit includes current transformer, voltage transformer, signal conditioner, frequency tracker and AD sampling A/D chips, wherein
The current transformer connects and composes current detection circuit with main switch inlet wire；
The voltage transformer connects and composes voltage detection circuit with main switch inlet wire；
The signal conditioner first input end is connected with the current detection circuit output end, the input of signal conditioner second
It is connected with the voltage detection circuit output end；
The frequency tracker input is connected with the voltage detection circuit output end, frequency tracker output end and centre
Manage unit connection；
The AD sampling A/D chips first input end connects the signal conditioner output end, the input of analog-digital converter second and center
Processing unit is connected, and AfD converter output is connected with CPU.
6. 400V distribution systems main switch gear according to claim 5 adjusts controller, it is characterised in that：The frequency
Tracker includes band-pass filter, comparator and optocoupler, and bandpass filter input is exported with the voltage detection circuit
End connection, the comparator input terminal is connected with bandpass filter output end, the optocoupler input and comparator output terminal phase
Even, the output end of optocoupler is connected with CPU.
7. the 400V distribution system main switches gear described in claim 1 adjusts the control method of controller, it is characterised in that bag
Include following steps：
1）Main switch overload electric current definite value is set by current ration setup unit；
2）Main switch primary current is converted to the digital quantity for CPU computing by current acquisition unit in real time；
3）CPU carries out computing to the digital quantity that sampling is obtained and obtains main switch primary current measured value；
4）The main switch primary current value that measurement is obtained is compared by CPU with overload electric current definite value；
4-1）When main switch primary current measured value is more than or equal to overload electric current definite value, central processing unit controls alarm indication
Charactron flicker in unit, while alarm equipment alarm, while central processing unit controls switching control unit sends effective letter
Number make auxiliary reclay action so as to connect control loop, switch trip realizes switch motion；
4-2）Do not dodged when main switch primary current measured value is less than the charactron in overload electric current definite value, alarm indication unit
Bright, alarm is not alarmed, and switching control unit is failure to actuate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710618359.9A CN107276094A (en) | 2017-07-26 | 2017-07-26 | 400V distribution system main switches gear adjusts controller and its adjustment control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710618359.9A CN107276094A (en) | 2017-07-26 | 2017-07-26 | 400V distribution system main switches gear adjusts controller and its adjustment control method |
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| CN107276094A true CN107276094A (en) | 2017-10-20 |
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| CN201710618359.9A Pending CN107276094A (en) | 2017-07-26 | 2017-07-26 | 400V distribution system main switches gear adjusts controller and its adjustment control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108592355A (en) * | 2018-05-17 | 2018-09-28 | 广东美的制冷设备有限公司 | Control box and air-conditioning system |
| CN109301754A (en) * | 2018-11-15 | 2019-02-01 | 国网河北省电力有限公司石家庄供电分公司 | Insulating bar and electroscope integrated device |
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|---|---|---|---|---|
| CN202275146U (en) * | 2011-10-10 | 2012-06-13 | 上海理工大学 | Running-state on-line monitoring system for on-load high-voltage distribution disconnecting switch |
| CN103713238A (en) * | 2014-01-13 | 2014-04-09 | 北京恒源利通电力技术有限公司 | Alarm current value settable bi-color fault indicator |
| CN206947951U (en) * | 2017-07-26 | 2018-01-30 | 国网江苏省电力公司宿迁供电公司 | 400V distribution system main switch gear adjustment control devices |
-
2017
- 2017-07-26 CN CN201710618359.9A patent/CN107276094A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202275146U (en) * | 2011-10-10 | 2012-06-13 | 上海理工大学 | Running-state on-line monitoring system for on-load high-voltage distribution disconnecting switch |
| CN103713238A (en) * | 2014-01-13 | 2014-04-09 | 北京恒源利通电力技术有限公司 | Alarm current value settable bi-color fault indicator |
| CN206947951U (en) * | 2017-07-26 | 2018-01-30 | 国网江苏省电力公司宿迁供电公司 | 400V distribution system main switch gear adjustment control devices |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108592355A (en) * | 2018-05-17 | 2018-09-28 | 广东美的制冷设备有限公司 | Control box and air-conditioning system |
| CN108592355B (en) * | 2018-05-17 | 2020-11-06 | 广东美的制冷设备有限公司 | Control box and air conditioning system |
| CN109301754A (en) * | 2018-11-15 | 2019-02-01 | 国网河北省电力有限公司石家庄供电分公司 | Insulating bar and electroscope integrated device |
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Application publication date: 20171020 |
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