CN207926435U - Load voltage-stabilizing system - Google Patents
Load voltage-stabilizing system Download PDFInfo
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- CN207926435U CN207926435U CN201820455844.9U CN201820455844U CN207926435U CN 207926435 U CN207926435 U CN 207926435U CN 201820455844 U CN201820455844 U CN 201820455844U CN 207926435 U CN207926435 U CN 207926435U
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- 238000003860 storage Methods 0.000 claims abstract description 4
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- 230000007423 decrease Effects 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
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- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
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- 238000012545 processing Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
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- 230000000087 stabilizing effect Effects 0.000 description 1
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Abstract
The utility model embodiment provides a kind of load voltage-stabilizing system, belongs to electric circuit field.The system includes：At least one load branch；At least one stable-pressure device, each stable-pressure device are connected in corresponding load branch, and each stable-pressure device includes：Diode is connected in the positive circuit of corresponding load branch, for being connected when loading normal, is ended in the load short circuits；Capacitor, it is in parallel with the load, it for the storage charge when the load is normal and filters, discharges charge in the load short circuits.The load voltage-stabilizing system ensure that Parallel opertation power good when DC power supply loads end short circuit, improve system stability.
Description
Technical field
The utility model is related to electric circuits, more particularly to a kind of load voltage-stabilizing system.
Background technology
Thermal power plant control system power supply unit provides for distributed processing unit (DPU), I/O modules, telecommunications modules
Working power, and outer transmitter equipment and switchgear offer work are provided or detect power supply, system power supply module both may be used
Be independently operated, can also redundant configuration.When module working power or detection supply voltage reduce larger, may cause to control
Device processed is stopped transport or is restarted, module acquisition or output signal are overturn, and causes relevant device false protection.In order to improve protective system in heat power control
The reliability of system power supply processed, each power plant is transformed by technology and equipment, in power supply redundancy configuration, power transfer device, load
It power supply distribution and safeguards etc. and all to have done a large amount of work, reduce input power or power supply unit is single or local fault
Influence to control system.
Since the module load unit that protective system in heat power control system is configured is more, it is impossible to which one-to-one is load unit
Power module is configured, different manufacturers are different according to control system scale, each module demand voltage grade, can configure transformation grade not
With, power supply unit module in varying numbers, then by diode by the power supply unit module of the same levels of redundant configuration simultaneously
Connection output is sent to load units such as each controller, modules.When a certain power module cell failure, work is clamped down on by diode
With, by redundant configuration normal power source unit power, ensure that the load units normal operation such as each controller, module.But when
When fault point is happened at load end, i.e. load end power supply short circuit, before ring current fuse failure, shunt voltage wink may be caused
Between decline to a great extent, so as to cause the operation irregularity of other shunt loads.
Fig. 1 is Power Plant Thermal Process Protection control system power source loads structural schematic diagram.As shown in Figure 1, Power Plant Thermal Process protection control
All there is this Power Management Design modes of Fig. 1 in system processed, and have multiple power plant to occur to cause DPU, I/O because of load end power supply short circuit
The operation irregularities such as module, telecommunications modules or measure loop protect system malfunction, unit tripping.
Fig. 2 is the schematic diagram of influence of the fuse failure of different capabilities to shunt voltage.As shown in Fig. 2, negative in order to analyze
The influence declined to parallel connection power supply when short circuit is carried, fuse failure experiment is done to circuit shown in Fig. 1, i.e., it is negative artificially to carry out any branch
Short circuit is carried, with oscillograph recording measurement is carried out to P1, P2 at 2 points, tests recorder data as shown in Fig. 2, different fuse value
The influence that (5A, 3A and 2A) declines power supply is different.
When fuse value is bigger in branch-path, shunt voltage moment fall is bigger, and the duration is longer, Bu Nengman
The working powers such as sufficient DPU, I/O module, communication converter requirement, to DPU can be caused to stop transport or restart, module acquires or output
Signal is overturn, and causes relevant device false protection.
Utility model content
The purpose of the utility model embodiment is to provide a kind of load voltage-stabilizing system, which ensure that direct current
Parallel opertation power good when the short circuit of power source loads end, improves system stability.
To achieve the goals above, the utility model embodiment provides a kind of load voltage-stabilizing system, which includes：At least
One load branch；At least one stable-pressure device, each stable-pressure device are connected in corresponding load branch, each voltage stabilizing
Device includes：Diode is connected in the positive circuit of corresponding load branch, for being connected when loading normal, described
End when load short circuits；Capacitor, it is in parallel with the load, it for the storage charge when the load is normal and filters, in institute
Charge is discharged when stating load short circuits.
Preferably, which further includes：At least one fusible link, each fusible link are being connected to corresponding load branch just
In the circuit of pole.
Preferably, the Diode series are between the fusible link and the load.
Preferably, the diode and the capacitor integrate.
Through the above technical solutions, using load voltage-stabilizing system provided by the utility model, which includes at least one
Load branch and at least one stable-pressure device, at least one stable-pressure device include diode and capacitor, utilize the anti-of diode
To cut-off and the effect of the temporary source of capacitor, branch power supply rapid decrease is prevented in load short circuits, ensure that parallel connection
Out-put supply is stablized, and system stability is improved.
The other feature and advantage of the utility model embodiment will give specifically in subsequent specific embodiment part
It is bright.
Description of the drawings
Attached drawing is further understood to the utility model embodiment for providing, an and part for constitution instruction,
With for explaining the utility model embodiment, but do not constituted to the utility model embodiment together with following specific implementation mode
Limitation.In the accompanying drawings：
Fig. 1 is Power Plant Thermal Process Protection control system power source loads structural schematic diagram；
Fig. 2 is the schematic diagram of influence of the fuse failure of different capabilities to shunt voltage；
Fig. 3 is the structural schematic diagram for the load voltage-stabilizing system that one embodiment of the utility model provides；
Fig. 4 is the structural schematic diagram for the load voltage-stabilizing system that another embodiment of the utility model provides.
Reference sign
1 diode, 2 capacitor
3 fusible links.
Specific implementation mode
The specific implementation mode of the utility model embodiment is described in detail below in conjunction with attached drawing.It should be understood that
It is that specific embodiment described herein is merely to illustrate and explains the utility model embodiment is not limited to this reality
Use new embodiment.
Fig. 3 is the structural schematic diagram for the load voltage-stabilizing system that one embodiment of the utility model provides.As shown in figure 3, this is
System includes：At least one load branch；At least one stable-pressure device, each stable-pressure device are connected in corresponding load branch,
Each stable-pressure device includes：Diode 1 is connected in the positive circuit of corresponding load branch, for normal in load
When be connected, end in the load short circuits；Capacitor 2, it is in parallel with the load, for the storage electricity when the load is normal
Lotus simultaneously filters, and discharges charge in the load short circuits.
Wherein, diode 1 and capacitor 2 can integrate, and also can be individually attached in load branch circuit.
Diode is that there are two the devices of electrode for a kind of tool in electronic component, only an electric current is allowed to be flowed through by single direction,
Have the function of " rectification ".In the present invention, each load branch connects a load, and with positive circuit and cathode
Circuit, load branch are connect with the power supply of redundancy, and the diode 1 in stable-pressure device is located in positive circuit, stable-pressure device
Crimping may be used for installation or the mode of welding is connected in circuit, or uses dedicated connecting terminal, diode 1, capacitor 2
Selection should meet the requirement of voltage class, branch circuit load loop current and load voltage allowable fluctuation range.
In the utility model embodiment, in normal work, 1 forward conduction of diode, capacitor 2, which plays, preserves charge
And filter action；It when the first load short circuits, second is loaded in the load branch of the n-th load at this time, capacitor 2 serves as temporarily
Power supply acts on, and diode 1 reversely ends, and prevents the power supply rapid decrease of the second load branch for being loaded to the n-th load.
Fig. 4 is the structural schematic diagram for the load voltage-stabilizing system that another embodiment of the utility model provides.As shown in figure 4, should
System further includes：At least one fusible link 3, each fusible link 3 are connected in the positive circuit of corresponding load branch；Described two
Pole pipe 1 is connected between the fusible link 3 and the load.
In the utility model embodiment, in normal work, 1 forward conduction of diode, capacitor 2, which plays, preserves charge
And filter action；When the first load short circuits, before the fusing of fusible link 3, shunt voltage, which exports moment, to be reduced, and second negative at this time
It is loaded onto in the load branch of the n-th load, capacitor 2 serves as temporary source effect, since diode 1 reversely ends, can prevent
Second is loaded to the power supply rapid decrease of the load branch of the n-th load, plays pressure stabilization function, until fusible link 3 fuse, restore by
Redundant power is powered.
The stable-pressure device of the utility model is suitable for the configuration output of thermal power plant protective system in heat power control system redundant power,
Multi-load current supply circuit in parallel causes Parallel opertation electric when solving the load end short circuit of protective system in heat power control system DC power supply
The problem of source momentary fluctuation, improves stability of control system, and simple installation, component is cheap, and user is according to load
Importance can selectively increase in branch circuit load, can Integrated design or discrete component combination be installed on load input terminal.
Through the above technical solutions, using load voltage-stabilizing system provided by the utility model, which includes at least one
Load branch and at least one stable-pressure device, at least one stable-pressure device include diode and capacitor, utilize the anti-of diode
To cut-off and the effect of the temporary source of capacitor, branch power supply rapid decrease is prevented in load short circuits, ensure that parallel connection
Out-put supply is stablized, and system stability is improved.
The optional embodiment of the utility model embodiment, still, the utility model are described in detail above in association with attached drawing
Embodiment is not limited to the detail in the above embodiment, can in the range of the technology design of the utility model embodiment
To carry out a variety of simple variants to the technical solution of the utility model embodiment, these simple variants belong to the utility model reality
Apply the protection domain of example.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the utility model is implemented
Example no longer separately illustrates various combinations of possible ways.
In addition, arbitrary combination can also be carried out between a variety of different embodiments of the utility model embodiment, as long as
It equally should be considered as the utility model embodiment disclosure of that without prejudice to the thought of the utility model embodiment.
Claims (4)
1. a kind of load voltage-stabilizing system, which is characterized in that the system includes：
At least one load branch；
At least one stable-pressure device, each stable-pressure device are connected in corresponding load branch, and each stable-pressure device includes：
Diode is connected in the positive circuit of corresponding load branch, short in the load for being connected when loading normal
End when road；
Capacitor, it is in parallel with the load, it for the storage charge when the load is normal and filters, in the load short circuits
Discharge charge.
2. load voltage-stabilizing system according to claim 1, which is characterized in that the system further includes：
At least one fusible link, each fusible link are connected in the positive circuit of corresponding load branch.
3. load voltage-stabilizing system according to claim 2, which is characterized in that the Diode series in the fusible link and
Between the load.
4. load voltage-stabilizing system according to claim 1, which is characterized in that the diode and the capacitor are integrated in
Together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820455844.9U CN207926435U (en) | 2018-04-03 | 2018-04-03 | Load voltage-stabilizing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820455844.9U CN207926435U (en) | 2018-04-03 | 2018-04-03 | Load voltage-stabilizing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207926435U true CN207926435U (en) | 2018-09-28 |
Family
ID=63595409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820455844.9U Active CN207926435U (en) | 2018-04-03 | 2018-04-03 | Load voltage-stabilizing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207926435U (en) |
-
2018
- 2018-04-03 CN CN201820455844.9U patent/CN207926435U/en active Active
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