CN106026370A - PLC-based 110kV transformer substation DC power supply system backup device - Google Patents
PLC-based 110kV transformer substation DC power supply system backup device Download PDFInfo
- Publication number
- CN106026370A CN106026370A CN201610601346.6A CN201610601346A CN106026370A CN 106026370 A CN106026370 A CN 106026370A CN 201610601346 A CN201610601346 A CN 201610601346A CN 106026370 A CN106026370 A CN 106026370A
- Authority
- CN
- China
- Prior art keywords
- power supply
- plc
- signal
- standby
- current
- 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.)
- Granted
Links
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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Safety Devices In Control Systems (AREA)
Abstract
The invention discloses a PLC-based 110kV transformer substation DC power supply system backup device comprising a PLC programmable controller, a 24V DC switching power supply and auxiliary relays K1 and K2. The 24V DC switching power supply supplies working power to the PLC programmable controller. When main and backup DC chargers fail to work or storage battery set end voltage decreases due to the abnormal condition of a centralized monitor, the device can automatically conduct the DC power supply output on an test power supply screen in the station and a DC closing bus in the station, and an emergency backup charging power supply is provided and accident alarm signals are uploaded to a master station and a substation background machine so as to strive for precious time for taking emergency defect eliminating measures for operation and maintenance personnel.
Description
Technical field
The present invention relates to power supply technique field, a kind of 110kV transforming plant DC power supply based on PLC
System reserve device.
Background technology
In view of the importance of DC loads all kinds of in transformer station, the global reliability of transformer station direct current system and stability are just
Naturally become the primary premise ensureing full station equipment safe operation.
DC charging module is as the important component part of straight-flow system, and its effect is to be converted to meet by three-phase alternating current
The controlled direct current of battery charging characteristic, on the one hand carries out floating charging and provides output of closing a floodgate, the opposing party accumulator battery
Face is connected to control mother by pressure unit, provides normal operating current for load.
Centralized monitor is typically mounted on DC power supply panel, is responsible for carrying out the running status of straight-flow system each unit entirely
The supervision in face and control.Arrange the original intention of transformer station's experiment power supply screen be for station equipment electrical test provide exchange 380V,
220V and in certain output voltage range electrodeless adjustable DC source.
Although straight-flow system is to work with the warm standby mode of N+1 redundancy to the requirement of charging module, it is contemplated that portion
In point transformer station, equipment operating environment is severe and the unfavorable factor such as ageing equipment, even if prior art has contemplated that redundancy,
The most perfectly safe.Additionally, centralized monitor once fault, out of hand to each DC charging motor, if now, just
Having charging module to break down, the danger of straight-flow system dead electricity also will be greatly increased.
Currently the defect elimination means for DC charging module and centralized monitor fault are usually and first look into loop, and no problem is again
Look into hardware, if it is determined that be that charging module or device plate damage and then must promptly coordinate standby redundancy and be replaced processing.
Which kind of method the most above-mentioned, all can inevitably make straight-flow system certain time period (the short-sighted defect elimination of time length time-consuming and
Fixed) in can only lean on accumulator battery temporary support, if last one barrier is out of order again, stream load of entirely standing erectly by dead electricity, after
The most hardly imaginable.
Summary of the invention
The present invention is directed to 110kV transformer station single set DC power system operation risk, have developed a kind of power transformation based on PLC
Stand DC power system stand-by provision.
Technical scheme is as follows:
A kind of 110kV transforming plant DC power-supply system stand-by provision based on PLC, including PLC, 24V
Direct-current switch power supply, auxiliary relay K1, K2,24V direct-current switch power supply is PLC offer work electricity
Source；The input terminal R1 of PLC connects public observing and controlling screen, gathers direct current Centralized Controller device exception
Hard contact point signal, the RS485 PORT COM of PLC is connected collection with DC charging module RS485 bus
Including current each charging module output electric current, the terminal voltage of accumulator battery, the real-time current in standby charge power supply loop,
The fault-signal of all active and standby DC charging modules is at interior amount, the hard contact that wherein direct current Centralized Controller device is abnormal
Signal, the fault-signal of all active and standby DC charging modules are switching value；The output electric current of current each charging module, storage
The terminal voltage of set of cells, the real-time current in standby charge power supply loop are analog quantity；Within a complete working cycle,
PLC reads in above-mentioned all switching values, analog quantity successively with scan mode, takes turns logic based on default workflow
Computing, refreshes the amount of outputing of PLC according to the result of logical operations；Auxiliary relay K1, K2 are by PLC
Controlled by Programmable Controller, auxiliary relay K1 controls the break-make of normal opened contact K11, K12, normal opened contact K11, K12
Distinguishing joint test power supply DC terminal and accumulator battery bus positive electricity and negative electricity, auxiliary relay K2 controls normal opened contact
The break-make of K21, normal opened contact K21 is connected to public observing and controlling screen spare terminal, is used for uploading a hard contact point signal to public
Observing and controlling screen, signal name is: DC charging system fault, standby power supply device put into；When active and standby DC charging is used at station
Machine total failure or owing to when centralized monitor work condition abnormality causes accumulator battery terminal voltage to decline, (accumulator battery free band is stood entirely
Load, the inevitable outcome of continuous discharge), this device can be automatically by the DC source output on experiment power supply screen in station and station
Interior direct current closing bus bar turn on, it is provided that emergency power charge power supply and on send accident alarm signal to main website and substation backstage
Machine, takes urgent defect elimination measure to strive for the quality time for O&M maintainer..
Described 110kV transforming plant DC power-supply system stand-by provision, the action logic of PLC is set to
Following all signals with door: direct current Centralized Controller device abnormal input enabling signal, all active and standby DC charging moulds
Block fault input enabling signal, each charging module output electric current is 0 input enabling signal, and the terminal voltage of accumulator battery is less than
The Minimum Acceptable Value input enabling signal of float charge voltage；When above-mentioned enabling signal was quoted within a sampling period simultaneously, PLC
Programmable Logic Controller output action signal, makes standby charge power supply devote oneself to work；Otherwise PLC is reliable not
Action, prevents from, owing to the wrong report of indivedual enabling signals causes standby charge power supply to miscarry, causing and sending out between multichannel power of alterating and direct current
Raw string electricity；After the conducting of standby charge power supply loop, PLC will be passed through the charging current data in this loop
485 communications protocol give host computer in real time.
The return logic of PLC is or door: the terminal voltage of accumulator battery inputs higher than its float charge voltage limit value
Return signal, loop output electric current inputs return signal more than floating current limit value, when above-mentioned signal has either signal to send
This device should reliably return；
When PLC outputs actuating signal, can directly drive auxiliary relay action, close its corresponding normal opened contact.
This device has matched auxiliary relay K1, K2 of two groups of band self-retaining functions altogether, and wherein the normally opened of auxiliary relay K1 connects
What some K11, K12 were used for realizing experiment power supply screen DC source opens into conducting, the wherein normal opened contact of auxiliary relay K2
K21 send a hard contact point signal to public observing and controlling screen on being used for, and signal name is: DC charging system fault, stand-by power supply
Device puts into；
When meeting PLC return signal, auxiliary relay K1, K2 should reliably return, open test power supply DC terminal,
Stop charging.
It is an advantage of the current invention that 110kV transformer station single set DC power system to be greatly improved by setting up this device
Reliability and stability.Particularly in straight-flow system, such as DC charging module total failure occurring, accumulator battery loses charging
During the emergency of power supply etc, it is possible to put into accurately rapidly, help to maintain the terminal voltage of accumulator battery, examine for O&M
The personnel of repairing take urgent defect elimination measure to strive for valuable time.
Accompanying drawing explanation
Fig. 1 is assembly of the invention principle schematic；
Fig. 2 is user program action logic of the present invention；
Fig. 3 is that user program of the present invention returns logic；
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in detail.
By selecting ripe industrial automation with PLC (Siemens S7-300 PLC), it is achieved this dress
Collection, computing and the execution put.Its structure as it is shown in figure 1, include PLC (Siemens S7-300 PLC),
24V direct-current switch power supply, 24V direct-current switch power supply provides working power for PLC；PLC programmable control
The input terminal R1 of device processed connects public observing and controlling screen, gathers the hard contact of direct current Centralized Controller device abnormal (fault)
Signal, the RS485 PORT COM of PLC is connected with DC charging module RS485 bus；PLC can compile
Range controller control auxiliary relay K1, K2, the break-make of auxiliary relay K1 control K11, K12 normal opened contact, K11,
K12 distinguishes joint test power supply DC terminal and accumulator battery bus positive electricity and negative electricity, and auxiliary relay K2 controls normally opened connecing
The break-make of some K21, is connected to public observing and controlling screen as a hard contact point signal.
Gatherer process:
Existing switching value in PLC intake, also has analog quantity.Switching value specifically includes that 1, direct current Centralized Controller dress
Put the hard contact point signal (taking from public observing and controlling screen) of exception (fault)；2, the fault of all active and standby DC charging modules
Signal (PLC carries RS485 communication function, can directly adopt from 485 buses of DC charging module into).Analog quantity (from
Adopt in 485 buses of DC charging module into) specifically include that 1, the output electric current of current each charging module；2, electric power storage
The terminal voltage of pond group；3, the real-time current etc. in standby charge power supply loop.
Within a complete working cycle, PLC reads in above-mentioned all intakes successively with scan mode, then, based on
Preset workflow (i.e. ladder diagram) and take turns logical operations, refresh PLC according to the result of logical operations able to programme
The amount of outputing of controller.
Calculating process:
The action logic (as shown in Figure 2) of PLC be set to following all signals with door: direct current collection
Middle controller device abnormal input enabling signal, all active and standby DC charging module failures input enabling signal, respectively charge
Module output current is 0 input enabling signal, and the terminal voltage of accumulator battery opens less than the Minimum Acceptable Value input of float charge voltage
Dynamic signal.When above-mentioned enabling signal was quoted within a sampling period simultaneously, PLC output action signal,
Standby charge power supply is made to devote oneself to work；Otherwise PLC is reliably failure to actuate, and prevents due to indivedual enabling signals
Wrong report causes standby charge power supply to miscarry, and causes and string electricity occurs between multichannel power of alterating and direct current.Standby charge power supply loop is led
After Tong, PLC device itself charging current data in this loop will give host computer by 485 communications protocol in real time；
The return logic of PLC is or door: the terminal voltage of accumulator battery inputs higher than its float charge voltage limit value
Return signal, loop output electric current inputs return signal more than floating current limit value, when above-mentioned signal has either signal to send
This device should reliably return；
When outputing actuating signal of PLC, can directly drive auxiliary relay action, close it
Corresponding normal opened contact；Normal opened contact K11, K12 of auxiliary relay K1 is used for realizing opening of experiment power supply DC source
Entering conducting, the normal opened contact K21 of auxiliary relay K2 is used for uploading a hard contact point signal to public observing and controlling screen, signal name
It is referred to as: DC charging system fault, standby power supply device put into；
When meeting PLC return signal, auxiliary relay K1, K2 should reliably return, open test power supply DC terminal,
Stop charging；
This device need not independent group screen, can be arranged on DC power supply panel nearby, and the signal contact between public observing and controlling
The standby core of the most original cable of available screen realizes, and only needs one, new clothes from experiment power supply screen to the electric power of DC charging screen
Cable.
It should be appreciated that for those of ordinary skills, can be improved according to the above description or be converted,
And all these modifications and variations all should belong to the protection domain of claims of the present invention.
Claims (2)
1. a 110kV transforming plant DC power-supply system stand-by provision based on PLC, it is characterised in that include
PLC, 24V direct-current switch power supply, auxiliary relay K1, K2,24V direct-current switch power supply is PLC
Programmable Logic Controller provides working power；The input terminal R1 of PLC connects public observing and controlling screen, gathers straight
The hard contact point signal that adfluxion middle controller device is abnormal, the RS485 PORT COM of PLC and DC charging
Module RS485 bus connects to gather and includes output electric current, the terminal voltage of accumulator battery of current each charging module, standby fills
Electricity the real-time current of electric power loop, all active and standby DC charging modules fault-signal in interior amount, wherein direct current concentrate
The hard contact point signal of control device exception, the fault-signal of all active and standby DC charging modules are switching value；Current each
The output electric current of charging module, the terminal voltage of accumulator battery, the real-time current in standby charge power supply loop are analog quantity；?
In one complete working cycle, PLC reads in above-mentioned all switching values, analog quantity successively with scan mode, based on presetting
Workflow takes turns logical operations, refreshes the amount of outputing of PLC according to the result of logical operations；
Auxiliary relay K1, K2 are controlled normal opened contact K11, K12 by PLC control, auxiliary relay K1
Break-make, normal opened contact K11, K12 respectively joint test power supply DC terminal and accumulator battery bus positive electricity and negative electricity,
Auxiliary relay K2 controls the break-make of normal opened contact K21, and normal opened contact K21 is connected to public observing and controlling screen spare terminal,
Being used for uploading a hard contact point signal to public observing and controlling screen, signal name is: DC charging system fault, standby power supply device
Put into；When station is with active and standby DC charging motor total failure or owing to centralized monitor work condition abnormality causes accumulator battery terminal voltage
During decline, the DC source on experiment power supply screen in station can be exported and direct current closing bus bar conducting in station by this device automatically,
There is provided emergency power charge power supply and on send accident alarm signal to main website and substation background computer.
110kV transforming plant DC power-supply system stand-by provision the most according to claim 1, it is characterised in that
The action logic of PLC be set to following all signals with door: direct current Centralized Controller device is abnormal the most defeated
Entering enabling signal, all active and standby DC charging module failures input enabling signal, each charging module output electric current is 0 defeated
Entering enabling signal, the terminal voltage of accumulator battery is less than the Minimum Acceptable Value input enabling signal of float charge voltage；Above-mentioned startup is believed
When number quoting within a sampling period simultaneously, PLC output action signal, make standby charge power supply throw
Enter work；Otherwise PLC is reliably failure to actuate, and prevents owing to the wrong report of indivedual enabling signals causes standby charging
Power supply miscarries, and causes and string electricity occurs between multichannel power of alterating and direct current；After the conducting of standby charge power supply loop, PLC is able to programme
Controller the charging current data in this loop will give host computer by 485 communications protocol in real time.
The return logic of PLC is or door: the terminal voltage of accumulator battery inputs higher than its float charge voltage limit value
Return signal, loop output electric current inputs return signal more than floating current limit value, when above-mentioned signal has either signal to send
This device should reliably return；
When PLC outputs actuating signal, can directly drive auxiliary relay action, close its corresponding normal opened contact.
This device has matched auxiliary relay K1, K2 of two groups of band self-retaining functions altogether, and wherein the normally opened of auxiliary relay K1 connects
What some K11, K12 were used for realizing experiment power supply screen DC source opens into conducting, the wherein normal opened contact of auxiliary relay K2
K21 send a hard contact point signal to public observing and controlling screen on being used for, and signal name is: DC charging system fault, stand-by power supply
Device puts into；
When meeting PLC return signal, auxiliary relay K1, K2 should reliably return, open test power supply DC terminal,
Stop charging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610601346.6A CN106026370B (en) | 2016-07-27 | 2016-07-27 | A kind of 110kV transforming plant DC power-supply system stand-by provisions based on PLC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610601346.6A CN106026370B (en) | 2016-07-27 | 2016-07-27 | A kind of 110kV transforming plant DC power-supply system stand-by provisions based on PLC |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106026370A true CN106026370A (en) | 2016-10-12 |
| CN106026370B CN106026370B (en) | 2018-06-29 |
Family
ID=57115366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610601346.6A Active CN106026370B (en) | 2016-07-27 | 2016-07-27 | A kind of 110kV transforming plant DC power-supply system stand-by provisions based on PLC |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106026370B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109298276A (en) * | 2018-11-09 | 2019-02-01 | 洛阳点晶智控科技有限公司 | The judgement detection method of circuit loop on-off in a kind of PLC controller |
| CN115898829A (en) * | 2022-11-04 | 2023-04-04 | 中国电力工程顾问集团中南电力设计院有限公司 | CAES system shared by modularly configured heat exchange systems and use method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101872999A (en) * | 2010-07-07 | 2010-10-27 | 宁夏电力公司吴忠供电局 | Low-voltage alternating current power supply programmable switching system of substation |
| CN202150641U (en) * | 2011-07-27 | 2012-02-22 | 上海凯华电源成套设备有限公司 | Integrated screen sharing AC distribution board and monitoring device |
| CN202167860U (en) * | 2011-07-15 | 2012-03-14 | 珠海银通新能源有限公司 | Intelligent energy storage machine |
| CN102882237A (en) * | 2011-07-15 | 2013-01-16 | 珠海银通新能源有限公司 | Intelligent energy storage machine and operating method thereof |
| CN203326704U (en) * | 2013-06-24 | 2013-12-04 | 连云港市港圣开关制造有限公司 | Backup power supply automatic switching apparatus |
| CN103887873A (en) * | 2014-03-12 | 2014-06-25 | 国家电网公司 | Power supply standby device for transformer substation achieved based on PLC |
-
2016
- 2016-07-27 CN CN201610601346.6A patent/CN106026370B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101872999A (en) * | 2010-07-07 | 2010-10-27 | 宁夏电力公司吴忠供电局 | Low-voltage alternating current power supply programmable switching system of substation |
| CN202167860U (en) * | 2011-07-15 | 2012-03-14 | 珠海银通新能源有限公司 | Intelligent energy storage machine |
| CN102882237A (en) * | 2011-07-15 | 2013-01-16 | 珠海银通新能源有限公司 | Intelligent energy storage machine and operating method thereof |
| CN202150641U (en) * | 2011-07-27 | 2012-02-22 | 上海凯华电源成套设备有限公司 | Integrated screen sharing AC distribution board and monitoring device |
| CN203326704U (en) * | 2013-06-24 | 2013-12-04 | 连云港市港圣开关制造有限公司 | Backup power supply automatic switching apparatus |
| CN103887873A (en) * | 2014-03-12 | 2014-06-25 | 国家电网公司 | Power supply standby device for transformer substation achieved based on PLC |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109298276A (en) * | 2018-11-09 | 2019-02-01 | 洛阳点晶智控科技有限公司 | The judgement detection method of circuit loop on-off in a kind of PLC controller |
| CN109298276B (en) * | 2018-11-09 | 2020-08-14 | 洛阳点晶智控科技有限公司 | Method for judging and detecting on-off of circuit loop in PLC (programmable logic controller) |
| CN115898829A (en) * | 2022-11-04 | 2023-04-04 | 中国电力工程顾问集团中南电力设计院有限公司 | CAES system shared by modularly configured heat exchange systems and use method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106026370B (en) | 2018-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105896470A (en) | Double loop network-based protection device free of main in-situ transformer and protection method | |
| CN202737576U (en) | Intelligent measure-control apparatus used for low voltage power distribution network | |
| CN204538802U (en) | Middle pressure power transmission and distribution automatic switching control system | |
| CN204089179U (en) | Radial pattern power distribution network self-healing control system | |
| CN108155707A (en) | A kind of DC bus powered system and its control method | |
| CN107843800A (en) | Supply network monitoring method, apparatus and system | |
| CN109672175B (en) | Power grid control method and device | |
| CN107257160A (en) | A kind of DC operation power supply system and its control method | |
| CN114172236A (en) | Automatic system for intelligent switching of storage batteries of transformer substation | |
| CN205753657U (en) | A kind of many stations based on LAN photovoltaic generation micro-grid system load-shedding equipment | |
| CN106026370A (en) | PLC-based 110kV transformer substation DC power supply system backup device | |
| CN105790432A (en) | Multi-redundancy DCS power supply device having alarm function | |
| CN202735422U (en) | Alternating current/direct current integrated power source system on-line early warning system used for substation | |
| CN204885910U (en) | Intelligent low tension distribution box | |
| CN208110360U (en) | A kind of pumping plant tele-control system | |
| CN110890790A (en) | Multi-interval integrated digital measurement and control device and main/standby machine switching method thereof | |
| CN206211493U (en) | A kind of intelligent security guard device power supply (DPS) | |
| CN109361261A (en) | A kind of distribution terminal super capacitor state on_line monitoring method | |
| CN204721302U (en) | A kind of photovoltaic plant intelligent controller | |
| CN104503667B (en) | Integrated power supply monitoring human-computer interface collocation method based on MCGS | |
| CN208110362U (en) | A kind of intelligence instrument acquisition substation | |
| CN205647011U (en) | Multiple redundancy has alarming function's DCS power supply unit | |
| CN207037041U (en) | Ring main unit battery on-Line Monitor Device | |
| CN202257243U (en) | Miniature steamer distributed centralized control system | |
| CN206378971U (en) | Ship power distribution cabinet safeguards early warning system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |