CN106253449B - A kind of transforming plant DC bus emergency bypass power supply device - Google Patents
A kind of transforming plant DC bus emergency bypass power supply device Download PDFInfo
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- CN106253449B CN106253449B CN201610744859.2A CN201610744859A CN106253449B CN 106253449 B CN106253449 B CN 106253449B CN 201610744859 A CN201610744859 A CN 201610744859A CN 106253449 B CN106253449 B CN 106253449B
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- 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
- H02J9/02—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which an auxiliary distribution system and its associated lamps are brought into service
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- Engineering & Computer Science (AREA)
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention provides a kind of transforming plant DC bus emergency bypass power supply device, comprising: working power unit, for obtaining operating voltage from other side DC bus；Detection unit, for detecting charger AC-input voltage and this side DC bus-bar voltage；Power supply unit, for obtaining supply voltage from this side battery group；Logic discrimination unit, for if detection unit detects that charger AC-input voltage and this side DC bus-bar voltage are zero, being determined as reaching device starting operation condition when operating voltage and supply voltage are all larger than zero；And detect charger AC-input voltage be greater than zero or this side DC bus-bar voltage be greater than zero, then be determined as reaching device condition out of service；Output unit, for logic discrimination unit differentiation reach device starting operation condition when, to this matched DC voltage of side DC bus output phase.The present invention can be in whole station ac voltage losing and what battery group was opened a way in emergency circumstances power for DC power system.
Description
Technical field
The present invention relates to technical field of power systems more particularly to a kind of transforming plant DC bus emergency bypass power supply to fill
It sets.
Background technique
As shown in Figure 1, substation station when operating normally is I, II sections of DC bus fanout operations with DC power system,
Every group of charger is powered simultaneously by two-way AC power source and exports DC power supply and run for whole station DC load, while charger pair
Battery group carries out floating charging.
After charger alternating current input power supplying whole power loss, run at this time by battery group band whole station DC load.Electric power storage
Pond group is powered in the most important functions of substation in whole station power loss for whole station DC load, to ensure protective device, telemechanical
Device, communication device are normal, control fault coverage.If but substation's whole station exchange power loss, battery group open circuit, at this time whole station after
Electrical protective device, telemechanical apparatus, communication device power loss, fault coverage expand.
To sum up, existing DC power system has notable defect, and power loss and battery can be exchanged in whole station by needing to develop
It can be still the new equipment of whole station DC load power supply in the case where group open circuit.
Summary of the invention
Technical problem to be solved by the present invention lies in, a kind of transforming plant DC bus emergency bypass power supply device is provided,
Power loss can be exchanged in whole station and what battery group was opened a way in emergency circumstances powers for DC power system, ensure station DC power supply
Load operates normally.
In order to solve the above technical problem, the present invention provides a kind of transforming plant DC bus emergency bypass power supply device, packets
It includes:
Working power unit, for taking electricity to obtain operating voltage from other side DC bus；
Detection unit, for detecting charger AC-input voltage and this side DC bus-bar voltage；
Power supply unit, for taking electricity to obtain supply voltage from this side battery group；
Logic discrimination unit, for when operating voltage and supply voltage are all larger than zero, if the detection unit detects
It is zero to charger AC-input voltage and this side DC bus-bar voltage, then is determined as reaching device starting operation condition；
And for when operating voltage and supply voltage are all larger than zero, if the detection unit detects charger, exchange input to be electric
Pressure is greater than zero or this side DC bus-bar voltage is greater than zero, then is determined as reaching device condition out of service；
Output unit, for the logic discrimination unit differentiation reach device starting operation condition when, to this side direct current
The matched DC voltage of bus output phase；
The working power unit is connected with the detection unit, the output unit, the logic discrimination unit respectively,
The logic discrimination unit is also connected with the detection unit and the output unit respectively, said supply unit and the output
Unit is connected.
Wherein, said supply unit takes electricity from six batteries after this side battery group.
Wherein, said supply unit include the first D.C. contactor being sequentially connected, 12V/110V DC/DC converter with
And second D.C. contactor, the 12V/110V DC/DC converter are used to obtain from six batteries after this side battery group
Supply voltage is converted to the DC voltage to match exported when device operation to this side DC bus.
Wherein, the detection unit includes relay, is connected with the first D.C. contactor auxiliary contact, both ends pass through respectively
DC fuse is connected on direct current positive and negative busbar.
Wherein, the logic discrimination unit includes the coil of the first D.C. contactor in parallel, the second D.C. contactor, should
Coil one end is connected with the second D.C. contactor in parallel, relay, and the other end and charger AC supply voltage circuit are auxiliary
The series connection of adjuvant grafting point.
Wherein, the working power unit is switched by working power, is connect with the logic discrimination unit.
Wherein, the output unit includes from six batteries outlet starting after this side battery group, until in this side bus
Between conducting wire and output switch.
Wherein, described device further include:
Protection location, for being sent out when short circuit or output overcurrent occur for device output loop, or in device input circuit
When raw short circuit or input overcurrent, cut off output loop or input circuit, the protection location respectively with the working power unit,
The output unit, the logic discrimination unit are connected.
Wherein, the protection location then include be arranged after this side battery group six batteries and the first D.C. contactor it
Between DC fuse, anti-electric current return circuit and the DC fuse being connected with anti-electric current return circuit.
Wherein, the anti-electric current return circuit is made of multiple diodes.
The beneficial effect of the embodiment of the present invention is:
Can be in whole station ac voltage losing and what battery group was opened a way in emergency circumstances power for DC power system, ensure that station is used
DC power supply load operates normally, and avoids fault coverage expansion, controls the generation of accident event；It is sent out in production application
Positive effect is waved, provides effective guarantee measure with DC power system safe and stable operation for station；
In the case where may be implemented in charger exchange input power loss, battery group open circuit, device starts automatically, is direct current
Source system power supply, and after DC power system restores normal, device automatically exits from operation；
When device internal fault can be achieved, such as device output overcurrent, device input overcurrent, and device automatic protection stops
Operation；
When emergency can be achieved, peripheral operation carries out emergency braking device；
Device power supply is derived from target DC power system battery, so that present apparatus wiring is simple, it is quick for installation, subtract
The economic cost of few emergency battery group, can large-area applications in DC power system.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of typical DC power-supply system wiring schematic diagram of substation.
Fig. 2 is a kind of structural schematic diagram of transforming plant DC bus emergency bypass power supply device of the embodiment of the present invention.
Fig. 3 is a kind of specific wiring schematic diagram of transforming plant DC bus emergency bypass power supply device of the embodiment of the present invention.
Fig. 4 is in the embodiment of the present invention, and the main logic of logic discrimination unit differentiates schematic diagram.
Specific embodiment
The explanation of following embodiment be with reference to attached drawing, can be to the specific embodiment implemented to the example present invention.
Shown in referring to figure 2., the embodiment of the present invention provides a kind of transforming plant DC bus emergency bypass power supply device, packet
It includes:
Working power unit, for taking electricity to obtain operating voltage from other side DC bus；
Detection unit, for detecting charger AC-input voltage and this side DC bus-bar voltage；
Power supply unit, for taking electricity to obtain supply voltage from this side battery group；
Logic discrimination unit, for when operating voltage and supply voltage are all larger than zero, if the detection unit detects
It is zero to charger AC-input voltage and this side DC bus-bar voltage, then is determined as reaching device starting operation condition；
And for when operating voltage and supply voltage are all larger than zero, if the detection unit detects charger, exchange input to be electric
Pressure is greater than zero or this side DC bus-bar voltage is greater than zero, then is determined as reaching device condition out of service；
Output unit, for the logic discrimination unit differentiation reach device starting operation condition when, to this side direct current
The matched DC voltage of bus output phase；
The working power unit is connected with the detection unit, the output unit, the logic discrimination unit respectively,
The logic discrimination unit is also connected with the detection unit and the output unit respectively, said supply unit and the output
Unit is connected.
In addition, for ensure in the event of a failure can be with self-protection, the present embodiment transforming plant DC bus emergency bypass electricity
Source device further include:
Protection location, for being sent out when short circuit or output overcurrent occur for device output loop, or in device input circuit
When raw short circuit or input overcurrent, cut off output loop or input circuit, the protection location respectively with the working power unit,
The output unit, the logic discrimination unit are connected.
Specifically, as shown in connection with fig. 3, the present embodiment transforming plant DC bus emergency bypass power supply device is used for because of failure
Lead to whole station AC power source power loss and battery group is opened a way, to ensure that protective relaying device, telemechanical apparatus, communication device etc. are straight
The case where galvanic electricity source load electricity consumption, at station, I, II section bus of DC power system respectively install one.
It is easy for description, illustrate by taking I sections of bus bar sides as an example below.
Power supply unit takes electricity from six batteries after this side battery group, and six batteries pass sequentially through directly after this side battery group
Flow fuse, D.C. contactor 1ZC, anti-electric current return circuit, 12V/110V DC/DC converter, D.C. contactor 2ZC with it is defeated
The one end switch 7ZK connects out, and the 7ZK other end is connect with #1 DC bus.That is, the power supply unit of the present embodiment include according to
Secondary connected the first D.C. contactor 1ZC, 12V/110V DC/DC converter and the second D.C. contactor 2ZC.12V/110V
DC/DC converter is used for the supply voltage that will be obtained from six batteries after this side battery group, is converted to device operation Shi Xiangben
The DC voltage of side DC bus output to match.Protection location then include be arranged after this side battery group six batteries with
DC fuse, anti-electric current return circuit between first D.C. contactor 1ZC and it is connected with anti-electric current return circuit straight
Flow fuse.Specifically, anti-electric current return circuit is made of multiple diodes.Output unit includes from six after this side battery group
Batteries outlet starting, until the central conductor of this side bus and output switch 7ZK.
Detection unit includes relay 1YJ, is connected with the first D.C. contactor 1ZC auxiliary contact, both ends pass through directly respectively
Flow fuse is connected on direct current positive and negative busbar.
Logic discrimination unit includes the coil of the first D.C. contactor 1ZC in parallel, the second D.C. contactor 2ZC, the line
Circle one end is connected with the second D.C. contactor 2ZC, relay 1YJ in parallel, and the other end and charger AC supply voltage return
The series connection of road 1JC1,2JC2 auxiliary contact.
Working power unit takes electricity in #2 DC bus, by working power switch 10ZK, connect with logic discrimination circuit.
Please in conjunction with shown in Fig. 4, working principle to the present embodiment transforming plant DC bus emergency bypass power supply device and
Process is introduced.
By taking #1 DC bus as an example, when normal operation, #1 DC bus, #2 DC bus have electricity, device working power
Unit, power supply unit have electric (operating voltage U1 > 0, supply voltage U2 > 0), i.e., #2 DC bus has electricity (because this side works
Power supply unit is to take electricity from other side DC bus), and after #1 battery group between 6 batteries without open circuit.
#1 charger ac power supply circuit has electricity, and 1JC1,2JC2 auxiliary contact disconnect, and #1 DC bus has electricity, detection
The relay 1YJ auxiliary contact of unit disconnects, and it is normal that logic discrimination unit is determined as DC power system, the present embodiment substation
DC bus emergency bypass power supply device does not put into operation.
If this survey DC bus power loss and charger are inputted without exchange, i.e. #1 DC bus power loss, and #1 charger without
Exchange input, charger ac power supply circuit 1JC1,2JC2 auxiliary contact closure, detection unit detect that the exchange of #1 charger is defeated
Enter power loss (charger AC-input voltage U4=0), #1 DC bus power loss (this side bus voltage U3=0), relay 1YJ
Auxiliary contact closure, logic discrimination unit differentiate #1 direct current system power loss, equality circuit starting operation condition, D.C. contactor
1ZC, 2ZC coil obtain electric closure, and output switch 7ZK closes a floodgate, and device starting operation is obtained from six batteries after this side battery group
Supply voltage be converted into 1110V DC voltage through 12V/110V DC/DC converter, #1 DC bus is given in output.
After device puts into operation, device operating voltage U1 > 0, supply voltage U2 > 0, bar coupler 5ZK or 6ZK are closed
Lock enables #1 DC bus obtain electric, and charger alternating current input power supplying telegram in reply, detection unit detects charger AC-input voltage U4
> 0 or this side bus voltage U3 > 0, device is determined as DC power system and restores normal, and relay 1YJ auxiliary contact disconnects, and fills
AC power of motor voltage circuit 1JC1,2JC2 auxiliary contact disconnects, and device automatically exits from operation.
In addition, if DC power system restores normally in time, and the present embodiment transforming plant DC bus emergency bypass electricity
Still in operation, staff can keep device out of service to source device by shutdown working power or power supply circuit.
When device is run, if short circuit or output overcurrent occur for output loop, the DC fuse of protection location will fuse, from
And output loop is cut off, realization device automatic protection is out of service.Equally, it if short circuit or input overcurrent occur for input circuit, protects
The DC fuse for protecting unit will fuse, to cut off input circuit, realization device automatic protection is out of service.
By above description it is found that the implementation of the embodiments of the present invention has the following beneficial effects:
Can be in whole station ac voltage losing and what battery group was opened a way in emergency circumstances power for DC power system, ensure that station is used
DC power supply load operates normally, and avoids fault coverage expansion, controls the generation of accident event；It is sent out in production application
Positive effect is waved, provides effective guarantee measure with DC power system safe and stable operation for station；
In the case where may be implemented in charger exchange input power loss, battery group open circuit, device starts automatically, is direct current
Source system power supply, and after DC power system restores normal, device automatically exits from operation；
When device internal fault can be achieved, such as device output overcurrent, device input overcurrent, and device automatic protection stops
Operation；
When emergency can be achieved, peripheral operation carries out emergency braking device；
Device power supply is derived from target DC power system battery, so that present apparatus wiring is simple, it is quick for installation, subtract
The economic cost of few emergency battery group, can large-area applications in DC power system.
By taking the regional 115 transforming plant DC power-supply systems of Shenzhen east piece as an example, with the side of 1 station, 2 covering device totally 230 covering devices
Formula calculates, if can substantially reduce Shenzhen Power Grid using the present embodiment transforming plant DC bus emergency bypass power supply device
The risk of the DC power supplies power loss such as protective relaying device, telemechanical apparatus, communication device, for station DC power system safety and stability
Operation provides guarantee.
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, therefore equivalent changes made in accordance with the claims of the present invention, is still within the scope of the present invention.
Claims (9)
1. a kind of transforming plant DC bus emergency bypass power supply device characterized by comprising
Working power unit, for taking electricity to obtain operating voltage from other side DC bus；
Detection unit, for detecting charger AC-input voltage and this side DC bus-bar voltage；
Power supply unit, for taking electricity to obtain supply voltage from this side battery group；
Logic discrimination unit, for being filled if the detection unit detects when operating voltage and supply voltage are all larger than zero
Motor AC input voltage and this side DC bus-bar voltage are zero, then are determined as reaching device starting operation condition；And
For when operating voltage and supply voltage are all larger than zero, if the detection unit detects that charger AC-input voltage is big
It is greater than zero in zero or this side DC bus-bar voltage, then is determined as reaching device condition out of service, the logic discrimination unit
Coil including the first D.C. contactor (1ZC) in parallel, the second D.C. contactor (2ZC), the coil one end and in parallel the
Two D.C. contactors (2ZC), relay (1YJ) are connected, the other end and charger AC supply voltage circuit (1JC1,2JC2)
Auxiliary contact series connection；
Output unit, for the logic discrimination unit differentiation reach device starting operation condition when, to this side DC bus
The matched DC voltage of output phase；
The working power unit is connected with the detection unit, the output unit, the logic discrimination unit respectively, described
Logic discrimination unit is also connected with the detection unit and the output unit respectively, said supply unit and the output unit
It is connected.
2. the apparatus according to claim 1, which is characterized in that said supply unit is from six batteries after this side battery group
Take electricity.
3. the apparatus of claim 2, which is characterized in that said supply unit includes that the first direct current being sequentially connected connects
Tentaculum (1ZC), 12V/110V DC/DC converter and the second D.C. contactor (2ZC), the 12V/110V DC/DC transformation
Device is used for the supply voltage that will be obtained from six batteries after this side battery group, is converted to when device is run to this side DC bus
The DC voltage of output to match.
4. device according to claim 3, which is characterized in that the detection unit includes relay (1YJ), straight with first
It flows contactor (1ZC) auxiliary contact to be connected, both ends pass through DC fuse respectively and are connected on direct current positive and negative busbar.
5. device according to claim 3, which is characterized in that the working power unit is switched by working power
(10ZK) is connect with the logic discrimination unit.
6. device according to claim 3, which is characterized in that the output unit includes from six sections after this side battery group
Battery outlet port starting, until the central conductor of this side bus and output switch (7ZK).
7. device according to claim 3, which is characterized in that further include:
Protection location, for short when short circuit or output overcurrent occur for device output loop, or in the generation of device input circuit
When road or input overcurrent, cut off output loop or input circuit, the protection location respectively with the working power unit, described
Output unit, the logic discrimination unit are connected.
8. device according to claim 7, which is characterized in that the protection location further includes being arranged in this side battery group
DC fuse between six batteries and the first D.C. contactor (1ZC), anti-electric current return circuit and anti-with anti-electric current afterwards
The DC fuse being connected to circuit.
9. device according to claim 8, which is characterized in that the anti-electric current return circuit is made of multiple diodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610744859.2A CN106253449B (en) | 2016-08-29 | 2016-08-29 | A kind of transforming plant DC bus emergency bypass power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610744859.2A CN106253449B (en) | 2016-08-29 | 2016-08-29 | A kind of transforming plant DC bus emergency bypass power supply device |
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| Publication Number | Publication Date |
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| CN106253449A CN106253449A (en) | 2016-12-21 |
| CN106253449B true CN106253449B (en) | 2019-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610744859.2A Active CN106253449B (en) | 2016-08-29 | 2016-08-29 | A kind of transforming plant DC bus emergency bypass power supply device |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110571909A (en) * | 2019-09-27 | 2019-12-13 | 国网重庆市电力公司璧山供电分公司 | open circuit protection mechanism for storage battery |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202333963U (en) * | 2011-11-22 | 2012-07-11 | 重庆市电力公司检修分公司 | Direct-current dual power intelligent seamless switching device |
| CN202721495U (en) * | 2012-06-21 | 2013-02-06 | 江苏省电力公司苏州供电公司 | Alternating-current and direct-current integrated uninterruptible power supply |
| CN203368094U (en) * | 2013-07-27 | 2013-12-25 | 西安重装矿山电器设备有限公司 | Flame-proof EPS power supply of mining blower local fan |
| CN206023353U (en) * | 2016-08-29 | 2017-03-15 | 深圳供电局有限公司 | A kind of transforming plant DC bus emergency bypass supply unit |
-
2016
- 2016-08-29 CN CN201610744859.2A patent/CN106253449B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202333963U (en) * | 2011-11-22 | 2012-07-11 | 重庆市电力公司检修分公司 | Direct-current dual power intelligent seamless switching device |
| CN202721495U (en) * | 2012-06-21 | 2013-02-06 | 江苏省电力公司苏州供电公司 | Alternating-current and direct-current integrated uninterruptible power supply |
| CN203368094U (en) * | 2013-07-27 | 2013-12-25 | 西安重装矿山电器设备有限公司 | Flame-proof EPS power supply of mining blower local fan |
| CN206023353U (en) * | 2016-08-29 | 2017-03-15 | 深圳供电局有限公司 | A kind of transforming plant DC bus emergency bypass supply unit |
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| Publication number | Publication date |
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| CN106253449A (en) | 2016-12-21 |
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