CN107516937A - A kind of motor control loop power supply mode - Google Patents
A kind of motor control loop power supply mode Download PDFInfo
- Publication number
- CN107516937A CN107516937A CN201710811356.7A CN201710811356A CN107516937A CN 107516937 A CN107516937 A CN 107516937A CN 201710811356 A CN201710811356 A CN 201710811356A CN 107516937 A CN107516937 A CN 107516937A
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- CN
- China
- Prior art keywords
- power supply
- control
- motor
- transformer
- loop power
- 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.)
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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
- H02J9/066—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 characterised by the use of dynamo-electric machines
-
- 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
- H02J3/24—Arrangements for preventing or reducing oscillations of power in networks
Abstract
The present invention provides a kind of motor control loop power supply mode, sets a special control transformer, is installed in the outlet of double loop power supply change-over switch in feeder cabinet.Described double loop power supply change-over switch is connected on two-way power supply, power supply is quoted from original motor controlling cabinet common bus all the way, another way power supply is then from emergency power supply units such as diesel-driven generators, when first via power supply is stopped, emergency power supply comes into operation at once, and then ensures the safe power supply of one, two class motor loads.Carry out the switching control of power supply simultaneously with major loop, it is special control transformer have all the time all the way power supply be its power supply, this control loop power supply mode is applied to various earthed systems, it is effective to solve the problems, such as to control power supply to produce fluctuation, and ensure to control the reliability of transformer frequency response, and then ensure the reliability of the motor control loop power supply of whole system.
Description
Technical field
The present invention relates to low-voltage distribution technical field, more particularly to a kind of motor control loop power supply mode.
Background technology
In low-voltage ground system, when earthed system is TN systems, it (is typically neutrality that power end, which has any to be directly grounded,
Point), the exposed conductive part of electric device is by protecting neutral conductor or protection conductor to be connected to this earth point.And in
Property conductor and protection conductor combined situation, TN systems have two kinds of situations of TN-S systems and TN-C systems, as shown in Figure 1 and Figure 2.
TN systems can directly provide N phases, and then provide AC220V control power supplys.But not all place is suitable for TN systems, right
Require high in uninterrupted power supply and have the place strictly limited to earth fault voltage, be adapted to use IT earthed systems.Work as ground connection
When system is IT system, the live part of power end is earth-free or has any to be led by impedance earth, the exposed of electric device
Electric part is directly grounded, as shown in Figure 3.Because the live part of power end is not directly grounded, AC220V controls can not be directly provided
Power supply processed, thus the single-phase control transformer of three phase transformations must be used.Control the schematic diagram of transformer as shown in Figure 4.It is logical
Control transformer is crossed by AC380V power conversions into AC220V, and then overcomes the problem of IT system can not provide control power supply.
In current low-voltage distribution system, the AC220V power supplys of motor control loop are typically carried by two kinds of power supply modes
For respectively leading directly from the common bus of this group of motor controlling cabinet or being increased by one by electric cabinet in this group of motor controlling cabinet
The special control transformer of platform is as power supply.Both power supply modes have one while motor control loop power supply is provided
The shortcomings that determining.As shown in table 1：
The shortcomings that 1 two kinds of motor control loop power supply modes of table
| Motor control electrical circuit power supply mode： | Shortcoming： |
| Lead directly from common bus | It can not be used in IT earthed systems, control power supply to be also easy to produce fluctuation |
| A control transformer is being set up by electric cabinet | Stable control power supply can not be provided for one, two class motor loads |
Because above two motor control loop power supply mode has the shortcomings that certain and limitation, therefore there is an urgent need to invent
A kind of new motor control loop power supply mode.
As shown in figure 5, the control power supply in TN systems leads directly from the wherein phase on common bus, although this is provided
Power supply is controlled, but when there is impact load, control power supply may be had an impact, and then cause its unstable.
In one group of motor controlling cabinet, part motor load is one, two type loads, it is necessary to the second road power supply.This is allowed for
There must be a double loop power supply change-over switch in this group of motor controlling cabinet.Double loop power supply change-over switch is connected on two-way power supply, and one
Road power supply is quoted from original motor controlling cabinet common bus, and another way power supply is then from emergency power supply units such as diesel-driven generators.When
When first via power supply is stopped, emergency power supply comes into operation at once, and then ensures the safe power supply of one, two class motor loads.
But the power supply mode of traditional control loop can not meet the power supply need of one, two type loads in earthed system
Will, the control loop of traditional IT system can not meet standby emergency power supply because control transformer is installed in by electric cabinet
Switching, and in IT earthed systems, when control loop dead electricity, even if motor main circuit has put into stand-by power supply, but motor is still
It can not operate, have a strong impact on the safe operation of equipment.
The content of the invention
In order to solve problem described in background technology, the present invention provides a kind of motor control loop power supply mode, sets one
The special control transformer of platform, the outlet of double loop power supply change-over switch in feeder cabinet is installed in, is entered simultaneously with major loop
The switching control of row power supply, it is special control transformer to have all the time all the way power supply is powered for it, this control loop power supply mode is applicable
In various earthed systems, effectively solve the problems, such as to control power supply to produce fluctuation, and ensure to control the reliable of transformer frequency response
Property, and then ensure the reliability of the motor control loop power supply of whole system.
In order to achieve the above object, the present invention is realized using following technical scheme：
A kind of motor control loop power supply mode, a special control transformer is set, is installed in feeder cabinet
The outlet of double loop power supply change-over switch.
Described double loop power supply change-over switch is connected on two-way power supply, and power supply is quoted from the public mother of original motor controlling cabinet all the way
Line, another way power supply is then from the emergency power supply units such as diesel-driven generator, when first via power supply is stopped, emergency power supply horse
On come into operation, and then ensure the safe power supply of one, two class motor loads.
Compared with prior art, the beneficial effects of the invention are as follows：
1st, a kind of motor control loop power supply mode of the invention, a special control transformer is set, installed
The outlet of double loop power supply change-over switch in feeder cabinet, the switching control of power supply is carried out with major loop simultaneously, and special control becomes
Depressor has all the way that power supply is its power supply all the time, suitable for various earthed systems, effectively solves control power supply and produces fluctuation
Problem, so as to ensure to control the reliability of transformer frequency response and then ensure the reliable of the motor control loop power supply of whole system
Property.
2nd, a kind of motor control loop power supply mode of the invention, by changing control position resolver without increasing it
His electrical equipment, has efficiently controlled cost, and scheme is simple, it is easy to accomplish.
Brief description of the drawings
Fig. 1 is TN-S system earths figure in background of invention；
Fig. 2 is TN-C system earths figure in background of invention；
Fig. 3 is that IT system ground connection is schemed in background of invention；
Fig. 4 is control transformer principle figure in background of invention；
Fig. 5 is to control power supply to lead directly from common bus electric power system figure in background of invention；
Fig. 6 is to control transformer to be arranged on by the electric power system figure on electric cabinet in the embodiment of the present invention；
Fig. 7 is to control transformer to be arranged on by the electrical schematic diagram on electric cabinet in the embodiment of the present invention；
Fig. 8 is to control transformer to be arranged on feeder cabinet double loop power supply change-over switch outlet power supply system in the embodiment of the present invention
System figure；
Fig. 9 is to control transformer electrically former installed in feeder cabinet double loop power supply change-over switch outlet in the embodiment of the present invention
Reason figure.
Embodiment
Embodiment provided by the invention is described in detail below in conjunction with accompanying drawing.
A kind of motor control loop power supply mode, a special control transformer is set, is installed in feeder cabinet
The outlet of double loop power supply change-over switch.
Described double loop power supply change-over switch is connected on two-way power supply, and power supply is quoted from the public mother of original motor controlling cabinet all the way
Line, another way power supply is then from the emergency power supply units such as diesel-driven generator, when first via power supply is stopped, emergency power supply horse
On come into operation, and then ensure the safe power supply of one, two class motor loads.
【Embodiment】
Steel Xichang cold rolling project continuous annealing unit is climbed, increases a set of motor controlling cabinet group newly, is powered, connect for it by a transformer
Ground pattern is IT system.Equipment component is one, two type loads in institute's on-load, and emergency power supply is low quoted from diesel-driven generator institute band
Compress switch cabinet.
As shown in fig. 6, the capacity of TM1 transformers is 800KVA, and 10kV/0.38kV, mode of connection Dy11, Grounding Types
For IT system.Because system can not provide AC220V control power supplys, control power supply can not lead directly from common bus, set one
Transformer TC1.0 is controlled, the capacity for controlling transformer is 10KVA, 380V/220V, and control transformer can provide whole controls
Power supply processed.
As shown in fig. 7, if control transformer is arranged on by the electricity in electric cabinet, controlling transformer in the conventional mode
Source leads directly from common bus, sets a QF1.0c breaker to be used for protecting control transformer.Control the extraction electricity of transformer
Source is connected to control bus, and the control power supply of all electrical equipments is quoted from control bus.Can solve control electricity in this way
The problem of source in source and stability.But for this group of motor controlling cabinet, there are one, two class motors to bear in institute's on-load
Lotus, the requirement to power supply are higher.For one, two class motor loads, when working power breaks down, emergency power supply input
Use, effectively solve the second road power issue of electrical source of power.But with this traditional mode, control transformer is installed
On by electric cabinet, when working power breaks down, control transformer does not have emergency power supply, ultimately results in one, two class motors and bears
The control power supply of lotus can not provide.By using the motor control loop power supply mode of the present invention, can effectively solve one, two
The control power issue of class motor load.
As shown in figure 8, setting a double loop power supply change-over switch QF1.0c in feeder cabinet, working power is quoted from electricity all the way
Power supply in machine switch board group feeds out loop, and another way power supply feeds out loop quoted from the power supply of emergency power supply.When working power is sent out
During raw failure, double loop power supply change-over switch QF1.0c disconnects working power, and emergency power supply detects the working power power-off sent
Start emergency power supply after signal, now double loop power supply change-over switch QF1.0c switches to emergency power supply, and then ensure that one, two classes
The power supply supply of motor load.
As shown in figure 9, change traditional motor control loop power supply mode, will control transformer TC1.0 position from by
Electric cabinet moves to the outlet of double loop power supply change-over switch, sets a QF1.0c breaker to be used for protecting control transformer.Control
The extraction power supply of transformer is connected to control bus, and the control power supply of all electrical equipments is quoted from control bus.Because control becomes
The position of depressor changes so that controls transformer to remain able to when working power failure causes emergency power supply to come into operation
Normal work, and then ensure that control power supply can meet the requirement of one, two class motor loads.Still become simultaneously using setting control
The mode of depressor effectively solves the problems, such as the source and the stability that control power supply.
Above example is implemented under premised on technical solution of the present invention, gives detailed embodiment and tool
The operating process of body, but protection scope of the present invention is not limited to the above embodiments.Method therefor is such as without spy in above-described embodiment
It is conventional method not mentionlet alone bright.
Claims (2)
1. a kind of motor control loop power supply mode, it is characterised in that a special control transformer is set, is installed in
The outlet of double loop power supply change-over switch in feeder cabinet.
2. a kind of motor control loop power supply mode according to claim 1, it is characterised in that described double loop power supply turns
Change switch to be connected on two-way power supply, power supply then comes from diesel oil quoted from original motor controlling cabinet common bus, another way power supply all the way
The emergency power supply units such as generator, when first via power supply is stopped, emergency power supply comes into operation at once, and then ensures one kind
With the safe power supply of two class motor loads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710811356.7A CN107516937A (en) | 2017-09-11 | 2017-09-11 | A kind of motor control loop power supply mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710811356.7A CN107516937A (en) | 2017-09-11 | 2017-09-11 | A kind of motor control loop power supply mode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107516937A true CN107516937A (en) | 2017-12-26 |
Family
ID=60723985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710811356.7A Pending CN107516937A (en) | 2017-09-11 | 2017-09-11 | A kind of motor control loop power supply mode |
Country Status (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105720602A (en) * | 2016-01-21 | 2016-06-29 | 易事特集团股份有限公司 | Photovoltaic grid-connected power generating energy storage inverter grid-connected-off-grid system and operation device thereof |
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| JP2004320949A (en) * | 2003-04-18 | 2004-11-11 | Fuji Electric Systems Co Ltd | Voltage drop compensating device |
| CN104393669A (en) * | 2014-11-28 | 2015-03-04 | 中国北车集团大连机车车辆有限公司 | Power supply circuit for auxiliary systems of multiple diesel generator units |
| CN105024450A (en) * | 2015-08-10 | 2015-11-04 | 常熟开关制造有限公司(原常熟开关厂） | Dual-power-source automatic conversion device and conversion control method thereof and dual-power-source power supply system |
| CN105471241A (en) * | 2015-12-23 | 2016-04-06 | 辽宁荣信电气传动技术有限责任公司 | Mechanical contactor based two-path-power-supply high-voltage frequency converter unit bypass apparatus |
| CN205960786U (en) * | 2016-08-29 | 2017-02-15 | 云南能投威士科技股份有限公司 | Control system is hauled oneself willingly into fully to station service |
| CN206259747U (en) * | 2016-08-31 | 2017-06-16 | 马鞍山当涂发电有限公司 | A kind of feeder double loop power supply control switching circuit |
| CN206283315U (en) * | 2016-12-20 | 2017-06-27 | 佛山奇正电气有限公司 | A kind of dual power supply switching electrical equipment electricity cabinet |
-
2017
- 2017-09-11 CN CN201710811356.7A patent/CN107516937A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004320949A (en) * | 2003-04-18 | 2004-11-11 | Fuji Electric Systems Co Ltd | Voltage drop compensating device |
| CN104393669A (en) * | 2014-11-28 | 2015-03-04 | 中国北车集团大连机车车辆有限公司 | Power supply circuit for auxiliary systems of multiple diesel generator units |
| CN105024450A (en) * | 2015-08-10 | 2015-11-04 | 常熟开关制造有限公司(原常熟开关厂） | Dual-power-source automatic conversion device and conversion control method thereof and dual-power-source power supply system |
| CN105471241A (en) * | 2015-12-23 | 2016-04-06 | 辽宁荣信电气传动技术有限责任公司 | Mechanical contactor based two-path-power-supply high-voltage frequency converter unit bypass apparatus |
| CN205960786U (en) * | 2016-08-29 | 2017-02-15 | 云南能投威士科技股份有限公司 | Control system is hauled oneself willingly into fully to station service |
| CN206259747U (en) * | 2016-08-31 | 2017-06-16 | 马鞍山当涂发电有限公司 | A kind of feeder double loop power supply control switching circuit |
| CN206283315U (en) * | 2016-12-20 | 2017-06-27 | 佛山奇正电气有限公司 | A kind of dual power supply switching electrical equipment electricity cabinet |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105720602A (en) * | 2016-01-21 | 2016-06-29 | 易事特集团股份有限公司 | Photovoltaic grid-connected power generating energy storage inverter grid-connected-off-grid system and operation device thereof |
| CN105720602B (en) * | 2016-01-21 | 2019-02-05 | 易事特集团股份有限公司 | Parallel network power generation energy storage inverter is grid-connected-off-grid system and its running gear |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171226 |
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| RJ01 | Rejection of invention patent application after publication |