CN106653332A - Energy-saving device and energy-saving system for three-phase transformer - Google Patents
Energy-saving device and energy-saving system for three-phase transformer Download PDFInfo
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- CN106653332A CN106653332A CN201611149180.5A CN201611149180A CN106653332A CN 106653332 A CN106653332 A CN 106653332A CN 201611149180 A CN201611149180 A CN 201611149180A CN 106653332 A CN106653332 A CN 106653332A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16576—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing DC or AC voltage with one threshold
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
Abstract
The invention provides an energy-saving device and energy-saving system for a three-phase transformer and relates to the technical field of transformers. The energy-saving device comprises at least three energy-saving change-over switches, wherein one energy-saving change-over switch is a single-pole single-throw switch and is used for controlling on/off of one phase of line in a high-voltage side incoming line phase of the three-phase transformer; the other two energy-saving change-over switches are single-pole double-throw switches and are used for controlling on/off of two phases of lines in a low-voltage side outgoing line phase of the three-phase transformer respectively; and tool bits of the single-pole double-throw switches are arranged on the other phase of line, except for the two phases of lines, in the low-voltage side outgoing line phase when the two phases of lines are cut off. The energy-saving system comprises the three-phase transformer and the energy-saving device. According to the energy-saving device and the energy-saving system, the no-load loss of the three-phase transformer is effectively reduced.
Description
Technical field
The present invention relates to transformer technology field, more particularly, to a kind of energy saver and energy-conservation for three-phase transformer
System.
Background technology
Three-phase transformer occupies critical role in power domain, it is well known that the open circuit loss of three-phase transformer is three
Exist in real time in the case that phase transformer terminal voltage is constant, and constant magnitude.
However, when three-phase transformer institute on-load is reduced, such as in the case that at night power load is few, three phase transformations
The open circuit loss of depressor is still constant, in addition can also, voltage low due to power consumption rise and increase.Damage to reduce transformer
Consumption, can replace original transformer using three-phase capacitance-adjustable transformer in prior art, but required investment is huge, with high costs,
It is not easy to popularization and application.
For the problem that above-mentioned three-phase transformer open circuit loss is larger, effective solution is not yet proposed at present.
The content of the invention
In view of this, it is an object of the invention to provide a kind of energy saver and energy conserving system for three-phase transformer,
To improve the larger problem of three-phase transformer open circuit loss present in prior art, the unloaded damage of three-phase transformer is effectively reduced
Consumption.
To achieve these goals, the technical scheme that the embodiment of the present invention is adopted is as follows：
In a first aspect, a kind of energy saver for three-phase transformer is embodiments provided, including at least three
Energy-conservation change-over switch, wherein, an energy-conservation change-over switch is single-pole single-throw switch (SPST), and the high-pressure side for controlling three-phase transformer is entered
The break-make of the phase line in line phase；
Two other energy-conservation change-over switch is single-pole double-throw switch (SPDT), for controlling the low-voltage side outlet of three-phase transformer respectively
The break-make of two phase lines in phase, and when two phase lines is disconnected, the cutter head of single-pole double-throw switch (SPDT) is placed in into low-voltage side outlet phase
In on another phase line in addition to two phase lines.
With reference in a first aspect, embodiments provide the first possible embodiment of first aspect, wherein, on
Stating energy saver also includes controller, and controller connects respectively with the operation coil of single-pole single-throw switch (SPST) and two single-pole double-throw switch (SPDT)s
Connect, for controlling the folding condition of single-pole single-throw switch (SPST) and two single-pole double-throw switch (SPDT)s.
With reference to the first possible embodiment of first aspect, second of first aspect is embodiments provided
Possible embodiment, wherein, above-mentioned energy saver also includes the reactive auto-compensator being connected with controller, for compensation three
The reactive power of phase transformer；Controller is additionally operable to control the running status of reactive auto-compensator.
With reference to second possible embodiment of first aspect, the third of first aspect is embodiments provided
Possible embodiment, wherein, above-mentioned reactive auto-compensator includes phase capacitor and compensation change-over switch；Wherein, compensation turns
Switch is changed for controlling the connection status of phase capacitor and the low-voltage side outlet phase line of three-phase transformer.
With reference to second possible embodiment of first aspect, the 4th kind of first aspect is embodiments provided
Possible embodiment, wherein, above-mentioned energy saver also includes the phase current mutual inductor being connected with controller, for detecting three-phase
The phase current of the low-voltage power supply system of transformer connection, generates and output current phase signal；Controller is additionally operable to receive and detects
The phase current signal of phase current mutual inductor output；Energy saver also includes the residual current transformer being connected with controller, is used for
The leakage current of the low-voltage power supply system of detection three-phase transformer connection, generates and output leakage current signal；Controller is additionally operable to connect
Receive and detect the leakage current signal that residual current transformer is exported；Controller is additionally operable to determine exception according to the result of detection
During situation, remote alarms are carried out.
With reference to the 4th kind of possible embodiment of first aspect, the 5th kind of first aspect is embodiments provided
Possible embodiment, wherein, above-mentioned energy saver also includes the communication unit being connected with controller, and communication unit includes GSM
One or more in module, GPRS module or WIFI module, for being connected with extraneous terminal communication；Controller is additionally operable to lead to
Cross communication unit terminal outwardly and send warning message.
With reference to any one possible embodiment in the 5th kind of possible embodiment of first aspect to first aspect, this
Inventive embodiments provide the 6th kind of possible embodiment of first aspect, wherein, the top of energy saver be additionally provided with into
Thread casing and outlet casing tube；Wherein, entrance bushing is used to access energy saver for the low-voltage side outlet phase line of three-phase transformer；
Outlet casing tube picks out energy saver for the low-voltage side outlet phase line of three-phase transformer；The side wall of energy saver is additionally provided with high pressure
Sleeve pipe, for accessing the energy saver for the high voltage side lead-in phase line of the three-phase transformer, is additionally operable to for the three-phase
The high-voltage side outlet wire phase line of transformer draws the energy saver.
Second aspect, the embodiment of the present invention also provides a kind of three-phase transformer energy conserving system, including three-phase transformer and
The energy saver of one side；Single-pole single-throw switch (SPST) is arranged in the phase line in the high voltage side lead-in phase of three-phase transformer；Two
Individual single-pole double-throw switch (SPDT) is respectively arranged in two phase lines in the low-voltage side outlet phase of three-phase transformer.
With reference to second aspect, the first possible embodiment of second aspect is embodiments provided, wherein, on
The three-phase windings bind mode for stating three-phase transformer is Dyn11, and single-pole single-throw switch (SPST) is arranged at the high-pressure side of three-phase transformer and enters
On A phase lines in line phase, the cutter head of two single-pole double-throw switch (SPDT)s is respectively arranged at a phases in the low-voltage side outlet phase of transformer
On circuit and c phase lines.
With reference to second aspect, second possible embodiment of second aspect is embodiments provided, wherein, on
The three-phase windings bind mode for stating three-phase transformer is Dyn1, and single-pole single-throw switch (SPST) is arranged at the high voltage side lead-in of three-phase transformer
On C phase lines in phase, the cutter head of two single-pole double-throw switch (SPDT)s is respectively arranged at a phase lines in the low-voltage side outlet phase of transformer
On road and on c phase lines.
A kind of energy saver and energy conserving system for three-phase transformer is embodiments provided, by energy saver
In three energy-conservation change-over switches changing the high voltage side lead-in phase line and low-voltage side outlet phase line of three-phase transformer
Break-make, the break-make of the phase line in specially one energy-conservation change-over switch control high voltage side lead-in phase, two energy-conservation conversions are opened
The break-make of two phase lines in control low-voltage side outlet phase is closed, and by being overlapped in except two phase lines in low-voltage side outlet phase
Outside another phase line on, the three-phase low-voltage load of transformer institute band can be changed to the phase line.Using this
The energy saver that bright embodiment is provided, the phase height that when transformer needs energy-saving run, can effectively disconnect transformer is pressed into
Line, while three-phase low-voltage load is changed to a phase low-pressure line-outgoing of transformer, can effectively reduce the zero load of transformer
Loss.According to transformer principle, the energy saver and energy conserving system for three-phase transformer provided in an embodiment of the present invention can be with
The open circuit loss of transformer is reduced to original 1/3, and implementation simple possible by realization, and cost is relatively low.
Other features and advantages of the present invention will be illustrated in the following description, also, the partly change from specification
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages are in specification, claims
And in accompanying drawing specifically noted structure realizing and obtain.
To enable the above objects, features and advantages of the present invention to become apparent, preferred embodiment cited below particularly, and coordinate
Appended accompanying drawing, is described in detail below.
Description of the drawings
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, below will be to concrete
The accompanying drawing to be used needed for embodiment or description of the prior art is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 shows that the three-phase transformer applicating energy-saving conversion that a kind of Dyn11 that the embodiment of the present invention is provided is coupled is opened
The principle schematic of pass；
Fig. 2 shows that the transformer fe in-core magnetic flux under a kind of normal operating condition that the embodiment of the present invention is provided is effective
Distribution value schematic diagram；
Fig. 3 shows that the transformer fe in-core magnetic flux under a kind of energy-saving run state that the embodiment of the present invention is provided is effective
Distribution value schematic diagram；
Fig. 4 shows a kind of structural representation of energy saver for three-phase transformer that the embodiment of the present invention is provided
Figure；
Fig. 5 shows a kind of three-phase transformer energy conserving system that the embodiment of the present invention provided under normal operating conditions
Main wiring diagram；
Fig. 6 shows a kind of three-phase transformer energy conserving system that the embodiment of the present invention provided under energy-saving run state
Main wiring diagram；
Fig. 7 shows another kind of three-phase transformer energy conserving system that the embodiment of the present invention provided under energy-saving run state
Main wiring diagram；
Fig. 8 shows a kind of front view of energy saver for three-phase transformer that the embodiment of the present invention is provided；
Fig. 9 shows a kind of side view of energy saver for three-phase transformer that the embodiment of the present invention is provided；
Figure 10 shows a kind of front view of three-phase transformer energy conserving system that the embodiment of the present invention is provided；
Figure 11 shows a kind of side view of three-phase transformer energy conserving system that the embodiment of the present invention is provided；
Figure 12 shows a kind of top view of three-phase transformer energy conserving system that the embodiment of the present invention is provided；
Icon：
10- energy-conservation change-over switches；20- controllers；30- reactive auto-compensators；40- phase current mutual inductors；
50- residual current transformers；60- communication units；1- pressure relief valves
2- outlet shields；3- wire output protectors；4- bushings；5- low pressure entrance bushings；
6- low-pressure line-outgoing sleeve pipes；100- energy savers；200- three-phase transformers.
Specific embodiment
To make purpose, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with accompanying drawing to the present invention
Technical scheme be clearly and completely described, it is clear that described embodiment is a part of embodiment of the invention, rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creative work premise
Lower obtained every other embodiment, belongs to the scope of protection of the invention.
When at present three-phase transformer institute on-load is reduced, such as in the case that at night power load is few, three phase-change pressures
The open circuit loss of device is still constant, in addition can also, voltage low due to the power consumption problem that rises and increase, based on this, the present invention
A kind of energy saver and energy conserving system for three-phase transformer that embodiment is provided., can improve present in prior art
The larger problem of three-phase transformer open circuit loss, effectively reduces the open circuit loss of three-phase transformer.
For ease of understanding the present embodiment, below three-phase transformer to be used for the one kind disclosed in the embodiment of the present invention
Energy saver and energy conserving system be described in detail.
Embodiment one：
A kind of energy saver for three-phase transformer is embodiments provided, including the conversion of at least three energy-conservations is opened
Close, wherein, an energy-conservation change-over switch is single-pole single-throw switch (SPST), in the high voltage side lead-in phase for controlling three-phase transformer
The break-make of phase line；
Two other energy-conservation change-over switch is single-pole double-throw switch (SPDT), for controlling the low-voltage side outlet of three-phase transformer respectively
The break-make of two phase lines in phase, and when two phase lines is disconnected, the cutter head of single-pole double-throw switch (SPDT) is placed in into low-voltage side outlet phase
In on another phase line in addition to two phase lines.
Embodiments provide a kind of energy saver for three-phase transformer, by energy saver in three section
Can change-over switch changing the high voltage side lead-in phase line of three-phase transformer and the break-make of low-voltage side outlet phase line, specially
The break-make of the phase line in one energy-conservation change-over switch control high voltage side lead-in phase, two energy-conservation change-over switches control low-pressure side
The break-make of two phase lines in outlet phase, and another phase by being overlapped in addition to two phase lines in low-voltage side outlet phase
On circuit, the three-phase low-voltage load of transformer institute band can be changed to the phase line.There is provided using the embodiment of the present invention
Energy saver, a phase high pressure inlet wire of transformer when transformer needs energy-saving run, can be effectively disconnected, while by three-phase
Low-voltage load is changed to a phase low-pressure line-outgoing of transformer, can effectively reduce the open circuit loss of transformer.According to transformation
Device principle, the energy saver and energy conserving system for three-phase transformer provided in an embodiment of the present invention, it is possible to achieve by transformer
Open circuit loss be reduced to original 1/3, and implementation simple possible, cost is relatively low.
The energy saver for three-phase transformer that the present embodiment is provided, energy-saving principle predominantly disconnects a phase of transformer
High pressure inlet wire, while three-phase low-voltage load is changed to a phase low-pressure line-outgoing of transformer, is capable of achieving the zero load of transformer
Loss and no-load current are reduced to original about 1/3.
In order to make it easy to understand, illustrate so that the connection set of three-phase transformer is as Dyn11 as an example, referring specifically to Fig. 1 institutes
The principle schematic of the three-phase transformer applicating energy-saving change-over switch that the Dyn11 for showing is coupled, Fig. 1 shows three-phase transformer high pressure
Side A phases, B phases and C phases, low-pressure side a phase, b phases, c phases and neutral conductor n, it is also shown that switch K1, K2 and K3；Wherein, switch K1 to use
In the break-make of control three-phase transformer high-pressure side A phase inlet wires, switch K2 and switch K3 is respectively used to control three-phase transformer low pressure
Side a phases and the break-make of c phase outlets.K1, K2, K3 switch is closed during normal power supply, the transformer core under normal operating condition
The effective Distribution value of interior magnetic flux can be found in shown in Fig. 2, and when energy-saving run is needed, K1, K2, K3 are opened, now three phase-change pressure
The high-pressure side A phase inlet wires of device are disconnected by K1, and low-pressure side a phase and the outlet of c phases are disconnected respectively by K2 and K3, the three-phase transformer it is low
Pressure side b phase normal power supplies.Now, the effective Distribution value of magnetic flux can be found in shown in Fig. 3 in the three phase transformer iron core.
According to three phase transformer iron core loss and no-load current substantially with magnetic flux in iron core about into quadratic relationship, it is known that three-phase
In addition to B phases magnetic flux keeps constant after switch change, magnetic flux virtual value is changed into original 1/2 to transformer in iron core at other, damages
Consumption and no-load current are each about original 1/4, according to three phase transformer iron core and stem stem information, commonly use three-phase transformer overall losses
And no-load current is averagely reduced for original 1/3 or so, therefore energy-saving effect is obvious.
By taking S11 type 800kVA transformers as an example, its rated no-load loss is 980W, and no-load current is 0.6%, using this
After bright technology, its open circuit loss is only about 330W, and no-load current is 0.2%, it is assumed that there be at 40% time its transformer in one day
In energy-saving run state, transformer non-work economic equivalent presses 0.1, and the transformer can save energy 3400 degree in 1 year.
In sum, the energy saver based on above-mentioned energy-saving principle, can effectively reduce the open circuit loss and sky of transformer
Electric current is carried, transformer energy saving purpose, and the energy saver simple structure is reached, is facilitated implementation, and cost is relatively low, is suitable to big model
Enclose popularization and application.
Embodiment two：
Based on above-described embodiment one, embodiments provide a kind of with the multi-functional section for three-phase transformer
Energy device, except above-mentioned energy-conservation change-over switch, the energy saver includes also including controller that the controller is changed respectively with energy-conservation
The operation coil connection of single-pole single-throw switch (SPST) and two single-pole double-throw switch (SPDT)s in switch, for controlling single-pole single-throw switch (SPST) and two
The folding condition of individual single-pole double-throw switch (SPDT).
Controller can switch corresponding operation coil come controlling switch folding shape by each in energy-conservation change-over switch
State, it is more simple and convenient without the need for manual control.
In order to the reactive loss of compensator transformer, its own unloaded nothing is specially compensated when transformer normally runs
Work(is lost, and energy saver also includes the reactive auto-compensator being connected with controller, for compensating the idle work(of three-phase transformer
Rate；The controller is additionally operable to control the running status of reactive auto-compensator.
Further, above-mentioned reactive auto-compensator can include phase capacitor and compensation change-over switch；Wherein, compensation conversion
Switch the connection status for controlling phase capacitor and the low-voltage side outlet phase line of three-phase transformer.Need in three-phase transformer
During energy-saving run, the folding condition for compensating change-over switch also changes, by taking the three-phase transformer that Dyn11 is coupled as an example, now
Still it is connected with phase capacitor with three-phase transformer low-pressure side b phase, and c phases and a phases are then no longer connected with phase capacitor.
Further, energy saver also includes the phase current mutual inductor being connected with controller, for detecting that three-phase transformer connects
The phase current of the low-voltage power supply system for connecing, generates and output current phase signal；Controller is additionally operable to receive and detect that phase current is mutual
The phase current signal of sensor output；
In addition, energy saver can also include the residual current transformer being connected with controller, for detecting three-phase
The leakage current of the low-voltage power supply system of transformer connection, generates and output leakage current signal；Controller is additionally operable to receive and detects
The leakage current signal of residual current transformer output.
When controller is additionally operable to determine abnormal conditions according to the result of detection, remote alarms are carried out.Specifically, control
Device can carry out overcurrent, leakage current etc. according to phase current signal, leakage current signal and judge extremely, can be being believed according to voltage
Number carry out high voltage, low-voltage etc. to judge extremely, and reported to the police to user by communication unit.
Phase current mutual inductor and residual current transformer can under the control of the controller effectively to the low of transformer connection
The current conditions of pressure electric power system are monitored, and the controller can also be by phase current mutual inductor and residual current transformer side
Just know the concrete data of phase current and leakage current, realize good supervisory function bit.
In order to make related personnel know the abnormal conditions of transformer in time, above-mentioned energy saver also includes and controller
Connected communication unit, communication unit include gsm module, GPRS module or WIFI module in one or more, for it is outer
The terminal communication connection on boundary.Controller can be sent the operational factor of three-phase transformer or warning information to the user of association
Terminal (mobile phone, iPad, computer etc.), user the operation conditions of transformer can be easily understood by user terminal with
And related power levels.Controller is additionally operable to send warning message by communication unit terminal outwardly so that user and
The abnormal conditions of Shi get Zhi transformers, controller can be sent out according to the voltage signal, current signal or leakage current signal for detecting
Existing electric energy abnormal conditions, such as high voltage, low-voltage, overcurrent or electric leakage etc., and reported to the police to user by communication module.
A kind of structural representation of the energy saver for three-phase transformer shown in Fig. 4 is specifically can be found in, the energy-conservation dress
Put including energy-conservation change-over switch 10, also include the controller 20 being connected with energy-conservation change-over switch 10, and with controller 20
Connected reactive auto-compensator 30, phase current mutual inductor 40, residual current transformer 50 and communication unit 60.There should be many work(
Can energy saver can realize transformer monitoring, transformer energy saving, and the function such as transformer station high-voltage side bus abnormal alarm, greatly
Improve the Experience Degree of user.
Embodiment three：
Based on embodiment two, a kind of three-phase transformer energy conserving system, including three-phase transformer are embodiments provided
With the energy saver of any one of embodiment one or embodiment two；Wherein, single-pole single-throw switch (SPST) is arranged at three-phase transformer
In a phase line in high voltage side lead-in phase；Two single-pole double-throw switch (SPDT)s are respectively arranged at the low-voltage side outlet phase of three-phase transformer
In two phase lines in.
When the three-phase windings bind mode of three-phase transformer is Dyn11, single-pole single-throw switch (SPST) is arranged at three-phase transformer
High voltage side lead-in phase in A phase lines on, the cutter head of two single-pole double-throw switch (SPDT)s is respectively arranged at the low-pressure side of transformer and goes out
On a phase lines and c phase lines in line phase.
When the three-phase windings bind mode of three-phase transformer is Dyn1, single-pole single-throw switch (SPST) is arranged at three-phase transformer
On C phase lines in high voltage side lead-in phase, the cutter head of two single-pole double-throw switch (SPDT)s is respectively arranged at the low-voltage side outlet of transformer
On a phase lines in phase and on c phase lines.
Because the three-phase windings bind mode of the distribution transformer commonly used is mostly Dyn11, therefore in order to make it easy to understand, with
Bind mode is mostly as a example by the energy conserving system of Dyn11 and illustrates, and can be found in a kind of three-phase transformer energy-conservation system shown in Fig. 5
System main wiring diagram under normal operating conditions, wherein, K1, K2 and K3 are the energy-conservation change-over switch of energy saver, specifically, K1
To be arranged at the single-pole single-throw switch (SPST) that three-phase transformer high-pressure side A phases enter line side, it is kept closed under normal operating conditions,
K2 and K3 is respectively the single-pole double-throw switch (SPDT) for being arranged at three-phase transformer low-pressure side a phase and c phase outgoing line sides, in normal operating condition
Under, the cutter head of K2 is placed in a phases, and the cutter head of K3 is placed in c phases.In Fig. 5 the high-pressure side A phase, B phase, C phase of the three-phase transformer with
And low-pressure side a phase, b phases, c phases are path, while Fig. 5 also show the neutral conductor n of the three-phase transformer low-pressure side.
A kind of main wiring diagram of the three-phase transformer energy conserving system shown in Fig. 6 under energy-saving run state, the difference with Fig. 5
It is that the K1 in Fig. 6 is open mode so that A phases disconnect, while the cutter head of K2 and K3 is changed to b phases.
Further, Fig. 7 shows main wiring diagram of another kind of three-phase transformer energy conserving system under energy-saving run state, with
The difference of Fig. 6 is to also show current transformer (three), residual current transformer, phase capacitor and compensation in Fig. 7 to turn
Change switch K4.In the figure 7, reactive auto-compensator is specially phase capacitor.
The state of K4 is explained in detail below：When above-mentioned three-phase transformer energy conserving system is in normal operating condition,
K1, K2, K3 switch is closed during normal power supply, wherein, a phases and c phase loads are connected on respectively the low of three-phase transformer by K2 and K3
Pressure side a phases are exported and exported with low-pressure side c phase, and the at the same time load in b phases is not connected on transformer b phases by switch and is exported
On.B corresponding phase capacitor is directly exported in transformer b phases, and the common compensation conversion of a, c corresponding phase capacitor is opened
K4 closures are closed, for the intrinsic unloaded reactive loss of compensator transformer.When load is less needs to be converted to energy saver mode, such as scheme
Shown in 7：Switch K1 disconnects, and transformer enters line side, and to only have B phase powered, K2 and K3 actions are by a phases and the switching of c phase loads in transformer
Low pressure b phase export.Now transformer is in single-phase operation state.
In embodiments of the present invention, the top of energy saver is additionally provided with entrance bushing and outlet casing tube；Wherein, inlet wire set
Manage for accessing energy saver for the low-voltage side outlet phase line of three-phase transformer；Low-pressure side of the outlet casing tube for three-phase transformer
Outlet phase line picks out energy saver；
The side wall of energy saver is additionally provided with bushing, for accessing for the high voltage side lead-in phase line of three-phase transformer
Energy saver, is additionally operable to draw energy saver for the high-voltage side outlet wire phase line of three-phase transformer.That is, for supplying three-phase transformer
High voltage side lead-in phase line and outlet phase line access and draw energy saver.
Specifically can be found in shown in Fig. 8 this be used for three-phase transformer energy saver front view and Fig. 9 shown in the section
The side view of energy device, wherein, Fig. 8 preferably shows that the energy saver is also configured with pressure relief valve 1, also show out
Line shield 2, wire output protector 3 and bushing 4, Fig. 9 then preferably shows low pressure entrance bushing 5, low-pressure line-outgoing sleeve pipe 6, phase
Current transformer 40, residual current transformer 50 and energy-conservation change-over switch 10；Wherein, such as pressure relief valve 1, outlet shield
2 grades for energy saver can arrangement, pressure relief valve can preferably play the protective action to transformer, and shield be for
The internal sleeve pipe of protection, when sleeve pipe for porcelain vase etc. when, can protect without the need for shield.Fig. 8-Fig. 9 is only a kind of energy saver
Schematic diagram, the structure of energy saver can be flexibly set according to demand in actual applications.
The front view of three-phase transformer energy conserving system shown in Figure 10, preferably shows energy saver in Figure 10
100 are installed on the overall structure after three-phase transformer 200, further referring also to the three-phase transformer energy conserving system shown in Figure 11
Side view, also illustrate energy saver 100 and three-phase transformer 200, can also be referring back to the three-phase transformer shown in Figure 12
The top view of energy conserving system, on the basis of energy saver 100 and three-phase transformer 200 is illustrated, further it is shown that energy saver is high
In being pressed into line 101 and energy saver high-voltage terminal 102, and transformer low voltage outlet a, b and c, and transformation side low-pressure side
Property line n, at the same time also show transformer high-voltage inlet wire A, B and C.
In sum, a kind of energy saver and energy conserving system for three-phase transformer provided in an embodiment of the present invention, leads to
The three energy-conservation change-over switches crossed in energy saver go out come the high voltage side lead-in phase line and low-pressure side for changing three-phase transformer
The break-make of line phase line, the break-make of the phase line in specially one energy-conservation change-over switch control high voltage side lead-in phase, two
The break-make of two phase lines in energy-conservation change-over switch control low-voltage side outlet phase, and by being overlapped in except in low-voltage side outlet phase
Two phase lines outside another phase line on, the three-phase low-voltage load of transformer institute band can be changed to the phase line
On.Using energy saver provided in an embodiment of the present invention, transformer can be effectively disconnected when transformer needs energy-saving run
One phase high pressure inlet wire, while three-phase low-voltage load is changed to a phase low-pressure line-outgoing of transformer, can effectively reduce becoming
The open circuit loss of depressor.According to transformer principle, the energy saver and section for three-phase transformer provided in an embodiment of the present invention
Can system, it is possible to achieve the open circuit loss of transformer is reduced to into original 1/3, and implementation simple possible, cost compared with
It is low.Additionally, the energy saver is also equipped with controller, reactive auto-compensator, phase current mutual inductor, residual current mutual inductance
Device etc., while can also possess the communication unit of GSM/GPRS communication functions, closely WIFI wireless communication functions etc., by control
Control of the device processed to each device, can realize the functions such as the Energy Saving Control to transformer, energy monitor, electric energy abnormal alarm.
Reactive auto-compensator is arranged in the line bar of transformer platform area or in other cabinets near energy saver, with energy saver split
Install.At the same time, user can pass through the convenient checking device operational factor of user terminal and receive warning message.
In addition, in the description of the embodiment of the present invention, unless otherwise clearly defined and limited, term " installation ", " phase
Company ", " connection " should be interpreted broadly, for example, it may be being fixedly connected, or being detachably connected, or be integrally connected；Can
Being to be mechanically connected, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, with concrete condition above-mentioned term can be understood at this
Concrete meaning in invention.
In describing the invention, it should be noted that term " " center ", " on ", D score, "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outward " be based on orientation shown in the drawings or position relationship, merely to
Be easy to description the present invention and simplify description, rather than indicate or imply indication device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.Additionally, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicating or implying relative importance.
Finally it should be noted that：Embodiment described above, specific embodiment only of the invention, to illustrate the present invention
Technical scheme, rather than a limitation, protection scope of the present invention is not limited thereto, although with reference to the foregoing embodiments to this
It is bright to be described in detail, it will be understood by those within the art that：Any those familiar with the art
The invention discloses technical scope in, it still can modify to the technical scheme described in previous embodiment or can be light
Change is readily conceivable that, or equivalent is carried out to which part technical characteristic；And these modifications, change or replacement, do not make
The essence of appropriate technical solution departs from the spirit and scope of embodiment of the present invention technical scheme, should all cover the protection in the present invention
Within the scope of.Therefore, protection scope of the present invention described should be defined by scope of the claims.
Claims (10)
1. a kind of energy saver for three-phase transformer, it is characterised in that including at least three energy-conservation change-over switches, wherein,
One energy-conservation change-over switch is single-pole single-throw switch (SPST), for the phase line in the high voltage side lead-in phase for controlling the three-phase transformer
The break-make on road；
Two other energy-conservation change-over switch is single-pole double-throw switch (SPDT), for controlling the low-voltage side outlet of the three-phase transformer respectively
The break-make of two phase lines in phase, and when two phase line is disconnected, the cutter head of the single-pole double-throw switch (SPDT) is placed in described
On another phase line in low-voltage side outlet phase in addition to two phase line.
2. energy saver according to claim 1, it is characterised in that the energy saver also includes controller, the control
Device processed is connected respectively with the operation coil of the single-pole single-throw switch (SPST) and two single-pole double-throw switch (SPDT)s, for controlling the list
The folding condition of monopole single throw switch and two single-pole double-throw switch (SPDT)s.
3. energy saver according to claim 2, it is characterised in that the energy saver also includes and the controller phase
Reactive auto-compensator even, for compensating the reactive power of the three-phase transformer；
The controller is additionally operable to control the running status of the reactive auto-compensator.
4. energy saver according to claim 3, it is characterised in that the reactive auto-compensator include phase capacitor and
Compensation change-over switch；Wherein, the compensation change-over switch is used to control the phase capacitor with the low pressure of the three-phase transformer
The connection status of side outlet phase line.
5. energy saver according to claim 3, it is characterised in that the energy saver also includes and the controller phase
Phase current mutual inductor even, for detecting the phase current of the low-voltage power supply system of the three-phase transformer connection, generates and exports
Phase current signal；
The controller is additionally operable to receive and detect the phase current signal of the phase current mutual inductor output；
The energy saver also includes the residual current transformer being connected with the controller, for detecting the three-phase transformer
The leakage current of the low-voltage power supply system of connection, generates and output leakage current signal；
The controller is additionally operable to receive and detect the leakage current signal of the residual current transformer output；
When the controller is additionally operable to determine abnormal conditions according to the result of detection, remote alarms are carried out.
6. energy saver according to claim 5, it is characterised in that the energy saver also includes and the controller phase
Communication unit even, the communication unit includes one or more in gsm module, GPRS module or WIFI module, for
Extraneous terminal communication connection；
The controller is additionally operable to send warning message to the extraneous terminal by the communication unit.
7. the energy saver according to any one of claim 1 to 6, it is characterised in that the top of the energy saver also sets
It is equipped with entrance bushing and outlet casing tube；Wherein, the entrance bushing is used for the low-voltage side outlet phase line for the three-phase transformer
Access the energy saver in road；The outlet casing tube is described for picking out for the low-voltage side outlet phase line of the three-phase transformer
Energy saver；
The side wall of the energy saver is additionally provided with bushing, for for the high voltage side lead-in phase line of the three-phase transformer
The energy saver is accessed, is additionally operable to draw the energy saver for the high-voltage side outlet wire phase line of the three-phase transformer.
8. a kind of three-phase transformer energy conserving system, it is characterised in that including three-phase transformer and any one of claim 1 to 7 institute
The energy saver stated；The single-pole single-throw switch (SPST) is arranged at the phase line in the high voltage side lead-in phase of the three-phase transformer
In；Two single-pole double-throw switch (SPDT)s are respectively arranged in two phase lines in the low-voltage side outlet phase of the three-phase transformer.
9. energy conserving system according to claim 8, it is characterised in that the three-phase windings bind mode of the three-phase transformer
For Dyn11, the single-pole single-throw switch (SPST) is arranged on the A phase lines in the high voltage side lead-in phase of the three-phase transformer, two
The cutter head of the single-pole double-throw switch (SPDT) is respectively arranged at a phase lines and c phase lines in the low-voltage side outlet phase of the transformer
On.
10. energy conserving system according to claim 8, it is characterised in that the three-phase windings connection side of the three-phase transformer
Formula is Dyn1, and the single-pole single-throw switch (SPST) is arranged on the C phase lines in the high voltage side lead-in phase of the three-phase transformer, two
The cutter head of the single-pole double-throw switch (SPDT) is respectively arranged on a phase lines in the low-voltage side outlet phase of the transformer and c phase lines
Lu Shang.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611149180.5A CN106653332A (en) | 2016-12-13 | 2016-12-13 | Energy-saving device and energy-saving system for three-phase transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611149180.5A CN106653332A (en) | 2016-12-13 | 2016-12-13 | Energy-saving device and energy-saving system for three-phase transformer |
Publications (1)
| Publication Number | Publication Date |
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| CN106653332A true CN106653332A (en) | 2017-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611149180.5A Pending CN106653332A (en) | 2016-12-13 | 2016-12-13 | Energy-saving device and energy-saving system for three-phase transformer |
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