CN107181262A - A kind of dynamic electric voltage recovery device and its method of work for intersecting power taking - Google Patents
A kind of dynamic electric voltage recovery device and its method of work for intersecting power taking Download PDFInfo
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- CN107181262A CN107181262A CN201710484623.4A CN201710484623A CN107181262A CN 107181262 A CN107181262 A CN 107181262A CN 201710484623 A CN201710484623 A CN 201710484623A CN 107181262 A CN107181262 A CN 107181262A
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
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Abstract
The present invention is a kind of dynamic electric voltage recovery device and its method of work for intersecting power taking, described dynamic electric voltage recovery device includes two nested structure identical dynamic electric voltage recovery devices, two sets of described dynamic electric voltage recovery devices are respectively arranged between corresponding first paragraph bus and the first service entrance switch and second segment bus and the second service entrance switch, simultaneously, the input of first dynamic electric voltage recovery device is connected to the output end of the second service entrance switch provided with line, the input of second dynamic electric voltage recovery device is connected to the output end of the first service entrance switch provided with line, realize and intersect power taking.The intersection way to take power that the present invention passes through two sections of buses of setting, realize the problem of DC energy storage circuit voltage of the converter cell avoided in wherein one section of grid voltage sags in dynamic electric voltage recovery device falls, it is simple in construction, it is easy to accomplish, cost is low, reliability is high.
Description
Technical field
The present invention relates to a kind of Power quality management device, more particularly to a kind of dynamic electric voltage for intersecting power taking recovers dress
Put and its method of work, applied to power quality controlling field.
Background technology
Statistics shows, in dynamic power quality problem, and Voltage Drop is occurrence frequency highest, influences most serious, causes
The maximum class power quality problem of economic loss.Dynamic electric voltage recovery device（DVR）It can be recognized with the Voltage Drop of compensation system
To be to solve the problems, such as that Voltage Drop is most economical, maximally effective electric device at present.
Current transformer is the core component in dynamic electric voltage recovery device, and the input of current transformer is commonly connected to power network, unsteady flow
The output end of device is generally a voltage source inverter, in grid voltage sags, for the voltage-source type inversion to output
Device provides galvanic current source, it is necessary to configure stable-pressure device in the DC side of inverter, and the electric current of this stable-pressure device is needed
Consider situation when line voltage maximum is fallen so that when the maximum current of stable-pressure device is much larger than line voltage specified operation
Electric current, device volume and cost will consider according to worst situation.The volume and cost of stable-pressure device are limited to, at present
The power of dynamic electric voltage recovery device can not accomplish very big, may be only available for middle low power.
The content of the invention
It is open a kind of it is an object of the invention to overcome the application limitation of dynamic electric voltage recovery device present in prior art
Intersect the dynamic electric voltage recovery device and its method of work of power taking, using the design principle of double sections of bussed supplies, using double acting state
Voltage restorer, which is realized, intersects power taking, is applicable not only to high-power, extra heavy DVR, and avoid dynamic electric voltage recovery
The problem of current transformer DC energy storage circuit voltage in device falls, has ensured the load normal power supply to being connected on bus.
What the present invention was realized in：A kind of dynamic electric voltage recovery device for intersecting power taking, it is characterised in that：Described is dynamic
State voltage recovery device includes two nested structure identical dynamic electric voltage recovery devices, respectively the first dynamic electric voltage recovery device and second
Dynamic electric voltage recovery device, two sets of described dynamic electric voltage recovery devices are respectively arranged on corresponding first paragraph bus and the first service entrance switch
Between second segment bus and the second service entrance switch, meanwhile, the input of first dynamic electric voltage recovery device connects provided with line
The output end of the second service entrance switch is connected to, the input of second dynamic electric voltage recovery device is connected to the first inlet wire provided with line
The output end of switch.
Described dynamic electric voltage recovery device includes converter cell, and filter inductance unit, filter capacitor unit couple transformation
Device unit, quick by-pass switch unit, the first inspection switch, the second inspection switch and bypass inspection switch, described first paragraph
Bus and second segment bus are connected by bus connection switch.Described converter cell includes output inverter circuit, DC energy storage electricity
Road and input rectification circuit, the input of the converter cell are used as the input of the dynamic electric voltage recovery device, the change
Stream device unit has two output ends, and wherein one end is connected with the input of the filter inductance unit, the other end and the filtering
One end connection of capacitor cell, the described other end of filter capacitor unit connects with the output end of described filter inductance unit
Connect, the secondary of the coupling transformer unit is connected in parallel with the filter capacitor unit, the bypass inspection switch series connection connects
It is connected between service entrance switch and load, the primary side of the coupling transformer unit is connected in parallel with the quick by-pass switch unit
It is connected afterwards close to one end of service entrance switch by first inspection switch with service entrance switch, the original of the coupling transformer unit
Side is connected in parallel rear one end close to load with the quick by-pass switch unit and connected by second inspection switch with load
Connect.
A kind of method of work of the dynamic electric voltage recovery device for intersecting power taking, it is characterised in that：Described dynamic electric
Recovery device is pressed to include two nested structure identical dynamic electric voltage recovery devices, respectively the first dynamic electric voltage recovery device and the second dynamic
Voltage restorer, be respectively arranged on corresponding first paragraph bus and the first service entrance switch and second segment bus and the second service entrance switch it
Between, meanwhile, the input of first dynamic electric voltage recovery device is connected to the output end of the second service entrance switch provided with line, described
The input of second dynamic electric voltage recovery device is connected to the output end of the first service entrance switch provided with line, and described dynamic electric voltage is extensive
Multiple device includes converter cell, filter inductance unit, filter capacitor unit, coupling transformer unit, quick by-pass switch unit,
First inspection switch, the second inspection switch and bypass inspection switch, described first paragraph bus and second segment bus pass through mother
Switch connection；When the voltage of first paragraph bus and second segment bus is normal, bus connection switch disconnects, the first service entrance switch and the
Two service entrance switch are closed, and the first described dynamic electric voltage recovery device and the second dynamic electric voltage recovery device intersect power taking, normal fortune
OK.
Converter cell in two sets of dynamic electric voltage recovery devices of the present invention can be straight using what is shared respectively by concentrating
The mode of stream bussed supply is run, when first paragraph bus dead electricity, and second segment bus it is normal when, bus connection switch closure, first enters
Wiretap disconnects, the second service entrance switch closure, and the first load and the second load are by second segment bussed supply, the first dynamic electric voltage
The input rectifying for exporting converter cell in inverter circuit and the second dynamic electric voltage recovery device of converter cell in restorer
Circuit is out of service, the output inverter circuit of the second dynamic electric voltage recovery device and the input rectifying electricity of the first dynamic electric voltage recovery device
Road is normally run, and realizes voltage compensating function when being powered by the single busbar of second segment bus；When second segment bus dead electricity, and
When first paragraph bus is normal, bus connection switch closure, the second service entrance switch disconnects, the first service entrance switch closure, the first load and the
Two loads are by first paragraph bussed supply, the output inverter circuit and the first dynamic electric voltage recovery device of the second dynamic electric voltage recovery device
Input rectification circuit it is out of service, the output inverter circuit of the first dynamic electric voltage recovery device and second dynamic electric voltage recovery device
Input rectification circuit is normally run, and realizes voltage compensating function when being powered by the single busbar of first paragraph bus.
Two sets of dynamic electric voltage recovery devices of the present invention can also be respectively arranged with defeated in the output end close to respective bus bars
Go out switch and in the output end close to corresponding service entrance switch by switching switch connection, when first paragraph bus and second segment bus
Voltage it is normal when, bus connection switch disconnects, and the first service entrance switch and the second service entrance switch close, and the switching switch is disconnected
Open, the first output switch, the second output switch are closed, the first dynamic electric voltage recovery device and the second dynamic electric voltage recovery device intersect
Power taking, normal operation；When first paragraph bus dead electricity, when second segment bus is normal, bus connection switch closure, the first service entrance switch breaks
Open, the second service entrance switch closure, the first load and the second load are by second segment bussed supply, and the switching is switched and first is defeated
Go out switch closure, the second output switch disconnects, and the second dynamic electric voltage recovery device is out of service, and the first dynamic electric voltage recovery device is normal
Operation, realizes voltage compensating function when being powered by the single busbar of second segment bus；When second segment bus dead electricity, first paragraph is female
When line is normal, bus connection switch closure, the second service entrance switch disconnects, the first service entrance switch closure, and the first load and the second load are equal
By first paragraph bussed supply, the switching switch and the second output switch closure, first output switch disconnect, the first dynamic
Voltage restorer is out of service, and the second dynamic electric voltage recovery device is normally run, and realizes and is powered by the single busbar of first paragraph bus
When voltage compensating function.
Two sets of dynamic electric voltage recovery devices of the present invention can also be in the output end point close to corresponding service entrance switch side
Not She You output switch, then with corresponding service entrance switch connect, and two output switchs in the side close to service entrance switch by cutting
Change switched fabric；When the voltage of first paragraph bus and second segment bus is normal, bus connection switch disconnect, the first service entrance switch and
Second service entrance switch is closed, and the switching is switched off, and the first output switch, the second output switch are closed, the first dynamic
Voltage restorer and the second dynamic electric voltage recovery device intersect power taking, normal operation；When first paragraph bus dead electricity, second segment bus is just
Chang Shi, bus connection switch closure, the first service entrance switch disconnects, the second service entrance switch closure, and the first load and the second load are by the
Two sections of bussed supplies, the switching switch and the first output switch closure, the second output switch disconnect, and the second dynamic electric voltage recovers
Device is out of service, and the first dynamic electric voltage recovery device is normally run, and realizes voltage when being powered by the single busbar of second segment bus
Compensation function；When second segment bus dead electricity, when first paragraph bus is normal, bus connection switch closure, the second service entrance switch disconnects, and first
Service entrance switch is closed, and the first load and the second load are by first paragraph bussed supply, the switching switch and the second output switch
Closure, the first output switch disconnects, and the first dynamic electric voltage recovery device is out of service, and the second dynamic electric voltage recovery device is normally run,
Realize voltage compensating function when being powered by the single busbar of second segment bus.
The beneficial effects of the invention are as follows：
1）Industry spot is typically the working method of double section bussed supplies, and the situation of Voltage Drop occurs simultaneously for double sections of buses
Seldom, the present invention solves wherein one section bus alternating current by setting two sets of dynamic electric voltage recovery devices to realize intersection power taking
The problem of DC energy storage circuit voltage falls in caused DVR when pressure is fallen, not only cost is low and simple in construction by the present invention,
It is reliable and stable.
2）The present invention is applicable not only to the DVR of middle low power, is also applied for high-power, extra heavy DVR, expands
DVR use scope.
Brief description of the drawings
Fig. 1 is the structure schematic diagram of existing dynamic electric voltage recovery device.
Fig. 2 is the frame structure schematic diagram of dynamic electric voltage recovery device of the present invention.
Fig. 3 is the schematic diagram of dynamic electric voltage recovery device embodiment 1 of the present invention.
Fig. 4 is the schematic diagram of dynamic electric voltage recovery device embodiment 2 of the present invention.
Fig. 5 is the schematic diagram of dynamic electric voltage recovery device embodiment 3 of the present invention.
In figure：1st, the first dynamic electric voltage recovery device；101st, the first converter cell；102nd, the first filter inductance unit；
103rd, the first filter capacitor unit；104th, the first coupling transformer unit；105th, the first quick by-pass switch unit；106th,
One inspection switch, the 107, second inspection switch；108th, the first bypass inspection switch；
2nd, the second dynamic electric voltage recovery device；201st, the second converter cell；202nd, the second filter inductance unit；203rd, second
Filter capacitor unit；204th, the second coupling transformer unit；205th, the second quick by-pass switch unit；206th, the 3rd maintenance
Switch；207th, the 4th inspection switch；208th, the second bypass inspection switch；
Q1, the first service entrance switch；Q2, the second service entrance switch；Q3, bus connection switch；Q4, switching switch；Q5, the first output are opened
Close；Q6, the second output switch.
Embodiment
1, existing dynamic electric voltage recovery device with reference to the accompanying drawings（DVR）Including a set of first dynamic electric voltage recovery device 1, described
One dynamic electric voltage recovery device 1 is connected in series between the first service entrance switch Q1 and load, first dynamic electric voltage recovery device 1
Input is connected with the first service entrance switch Q1 output end.First dynamic electric voltage recovery device 1 includes the first converter cell
101st, the first filter inductance unit 102, the first filter capacitor unit 103, the first coupling transformer unit 104, the first Quick side
Way switch unit 105, the first inspection switch 106, the second inspection switch 107 and the first bypass inspection switch 108.Described first becomes
The input of stream device unit 101 is used as the input of first dynamic electric voltage recovery device 1, first converter cell 101
Left end output end be connected with the input of the first filter inductance unit 102, the right-hand member of first converter cell 101
Output end is connected with the first filter capacitor unit 103, and the first filter capacitor unit 103 is connected in described first in parallel
Between the output end of filter inductance unit 102 and the lower end output end of first converter cell 101.First coupling becomes
The secondary of depressor unit 104 is connected in parallel with the first filter capacitor unit 103.The first coupling transformer unit 104
Primary side be connected in parallel with the described first quick by-pass switch unit 105.The first bypass inspection switch 108 is connected in series in
Between first service entrance switch Q1 and load, the primary side of the first coupling transformer unit 104 is opened with the described first quick bypass
Pass unit 105 is connected in parallel rear one end close to the first service entrance switch Q1 and passes through the inlet wire of the first inspection switch 106 and first
Q1 connections are switched, the primary side of the first coupling transformer unit 104 is in parallel with the described first quick by-pass switch unit 105 even
Rear one end close to load is connect to be connected with load by second inspection switch 107.
First converter cell 101 is an AC-DC-AC type current transformer, including input rectification circuit, DC energy storage
Circuit and output inverter circuit.Input rectification circuit can include input transformer, and rectification circuit can use diode, can
Control silicon or PWM active rectifications；DC energy storage circuit can be electric capacity, super capacitor, battery or combinations thereof；Export inversion
Circuit can be two level, three level, five level, the voltage-source type inversion electricity of cells cascaded multilevel or other topological structures
Road；Input rectification circuit can be single-phase or three-phase, and output inverter circuit can be to be single-phase, and three are single-phase, three facies tract center lines or
Three-phase is without center line.
First inspection switch 106, the second inspection switch 107, the first bypass inspection switch 108 and first is quickly bypassed
Switch element 105 can use electronic switch, mechanical switch or combinations thereof.During DVR normal works, the first bypass inspection
Repair switch 108 to disconnect, first inspection switch 106 and second inspection switch 107 are closed, DVR normal works.When
During DVR failures, the first bypass inspection switch 108 is closed, first inspection switch 106 and second inspection switch
107 are disconnected, and DVR is bypassed, and the normal power supply of load is not influenceed.The first filter inductance unit 102 and first filter
The effect of ripple capacitor cell 103 is to filter out the frequency voltage components that current transformer exports inverter circuit, it is to avoid harmonic pollution.
During DVR normal works, if line voltage is fallen, for the output to first converter cell 101
Inverter circuit provides galvanic current source, it is necessary to configure stable-pressure device in the DC energy storage circuit of inverter, and this is steady
The electric current of pressure device needs to consider situation when line voltage maximum is fallen so that the maximum current of stable-pressure device is much larger than power network
Electric current when voltagerating is run, device will consider in overall volume and cost according to worst situation, be limited to voltage stabilizing
The volume and cost of device, the power of existing dynamic electric voltage recovery device can not accomplish very big, may be only available for middle low power.
With reference to the accompanying drawings 2, a kind of dynamic electric voltage recovery device for intersecting power taking of the present invention, including the first dynamic electric voltage recovery device
1 and second dynamic electric voltage recovery device 2.First dynamic electric voltage recovery device 1 is located between first paragraph bus and the first service entrance switch Q1,
First load is connected with first paragraph bus.Second dynamic electric voltage recovery device 2 located at second segment bus and the second service entrance switch Q2 it
Between, the second load is connected with second segment bus.Meanwhile, the input of first dynamic electric voltage recovery device 1 is connected provided with line
To the second service entrance switch Q2 output end, the input of second dynamic electric voltage recovery device 2 is connected to first provided with line and entered
Wiretap Q1 output end.
With reference to the accompanying drawings 3, by taking first set dynamic electric voltage recovery device as an example, mainly by the first converter cell 101, the first filtering
Inductance unit 102, the first filter capacitor unit 103, the first coupling transformer unit 104, the first quick by-pass switch unit
105th, the first inspection switch 106, the second inspection switch 107 and the first bypass inspection switch 108 are constituted, described first paragraph bus
Connected with second segment bus by bus connection switch Q3.
The first described converter cell 101 includes output inverter circuit, DC energy storage circuit and input rectification circuit, institute
The input of the first converter cell 101 is stated as the input of the first dynamic electric voltage recovery device 1, first converter cell
101 have two output ends, and wherein one end is connected with the input of the first filter inductance unit 102, the other end and described the
One end connection of one filter capacitor unit 103.The other end of the first described filter capacitor unit 103 and the first described filtering
The output end connection of inductance unit 102.The secondary of the first coupling transformer unit 104 and the first filter capacitor unit
103 are connected in parallel, and the first bypass inspection switch 108 is connected in series between the loads of the first service entrance switch Q1 and first.Institute
The primary side and the described first quick by-pass switch unit 105 for stating the first coupling transformer unit 104 are connected in parallel rear close to first
Service entrance switch Q1 one end is connected by first inspection switch 106 with the first service entrance switch Q1, the first coupling transformation
The primary side of device unit 104 is connected in parallel rear one end close to the first load with the described first quick by-pass switch unit 105 and passed through
Second inspection switch 107 is connected with the first load.
The structure of second dynamic electric voltage recovery device 2 and first dynamic electric voltage recovery device 1 is same or like.
The probability very little of Voltage Drop occurs simultaneously for two sections of buses in power network, when the Voltage Drop of first paragraph bus, the
The voltage of two sections of buses is typically in normal condition, because the input power of the first dynamic electric voltage recovery device 1 is derived from second segment mother
Line, during the Voltage Drop of first paragraph bus, the DC energy storage circuit of the converter cell of first dynamic electric voltage recovery device 1
Voltage will not fall so that the structure of DC energy storage circuit is greatly simplified, and the capacity of the first dynamic electric voltage recovery device 1 can just be done
To very big, so as to realize applied to high-power.
Below by specific embodiment, the present invention is further elaborated：
Embodiment 1：
According to Fig. 3, in the dynamic electric voltage recovery device of intersection power taking of the invention, the first converter cell 101 and the second unsteady flow
Device unit 201, which is respectively provided with, concentrates shared dc bus, first converter cell 101 and second converter cell
201 dc bus is connected in parallel.
The dynamic electric voltage recovery device method of work of the intersection power taking of the present embodiment is as follows：
When the voltage of first paragraph bus and second segment bus is normal, bus connection switch Q3 disconnects, the first service entrance switch Q1 and the
Two service entrance switch Q2 are closed, and first dynamic electric voltage recovery device 1 and second dynamic electric voltage recovery device 2 intersect power taking,
Normal operation.
When first paragraph bus dead electricity, when second segment bus is normal, bus connection switch Q3 closures, the first service entrance switch Q1 disconnects,
Second service entrance switch Q2 is closed, and the first load and second is loaded by second segment bussed supply, the first dynamic electric voltage recovery device 1
The input rectification circuit for exporting inverter circuit and the second dynamic electric voltage recovery device 2 is out of service, the second dynamic electric voltage recovery device 2
The input rectification circuit of output inverter circuit and the first dynamic electric voltage recovery device 1 is normally run, and is realized when single busbar is powered
Voltage compensating function.
When second segment bus dead electricity, when first paragraph bus is normal, bus connection switch Q3 closures, the second service entrance switch Q2 disconnects,
First service entrance switch Q1 is closed, and the first load and second is loaded by first paragraph bussed supply, the second dynamic electric voltage recovery device 2
The input rectification circuit for exporting inverter circuit and the first dynamic electric voltage recovery device 1 is out of service, the first dynamic electric voltage recovery device 1
Output inverter circuit and the input rectification circuit of the second dynamic electric voltage recovery device 2 are normally run, when also achieving single busbar and powering
Voltage compensating function.
Embodiment 2：
According to Fig. 4, in the dynamic electric voltage recovery device of intersection power taking of the invention, first dynamic electric voltage recovery device 1 is close
The output end of first paragraph bus is connected by the first output switch Q5 with first paragraph bus；Second dynamic electric voltage recovery device 2
Output end close to second segment bus is connected by the second output switch Q6 with second segment bus, and first dynamic electric voltage recovers
The output end of the close service entrance switch of device 1 and second dynamic electric voltage recovery device 2 is by switching switch Q4 connections.Described first
The output inverter circuit of converter cell 101 can be two level, three level, five level, cells cascaded multilevel or other open up
Flutter the voltage-source type inverter circuit of structure.
The dynamic electric voltage recovery device method of work of the intersection power taking of the present embodiment is as follows：
When the voltage of first paragraph bus and second segment bus is normal, bus connection switch Q3 disconnects, the first service entrance switch Q1 and the
Two service entrance switch Q2 are closed, and the switching switch Q4 is disconnected, and the first output switch Q5, the second output switch Q6 are closed
Close.First dynamic electric voltage recovery device 1 and second dynamic electric voltage recovery device 2 intersect power taking, normal operation.
When first paragraph bus dead electricity, when second segment bus is normal, bus connection switch Q3 closures, the first service entrance switch Q1 disconnects,
Second service entrance switch Q2 is closed, and the first load and the second load are by second segment bussed supply, and the switching switchs Q4 and described
First output switch Q5 is closed, and the second output switch Q6 disconnects, and second dynamic electric voltage recovery device 2 is out of service, institute
The first normally operation of dynamic electric voltage recovery device 1 is stated, voltage compensating function when single busbar is powered is realized.
When second segment bus dead electricity, when first paragraph bus is normal, bus connection switch Q3 closures, the second service entrance switch Q2 disconnects,
First service entrance switch Q1 is closed, and the first load and the second load are by first paragraph bussed supply, and the switching switchs Q4 and described
Second output switch Q6 is closed, and the first output switch Q5 disconnects, and first dynamic electric voltage recovery device 1 is out of service, institute
The second normally operation of dynamic electric voltage recovery device 2 is stated, voltage compensating function when single busbar is powered is realized.
Embodiment 3：
According to Fig. 5, in the dynamic electric voltage recovery device of intersection power taking of the invention, first dynamic electric voltage recovery device 1 is close
First service entrance switch Q1 output end is connected by the first output switch Q5 with the first service entrance switch Q1；Second dynamic electric voltage
Restorer 2 is connected close to the second service entrance switch Q2 output end by the second output switch Q6 with the second service entrance switch Q2.It is described
One end of first output switch Q5 and the second output switch Q6 close service entrance switch is by switching switch Q4 connections.It is described
The output inverter circuit of first converter cell 101 can be two level, three level, five level, cells cascaded multilevel or its
The voltage-source type inverter circuit of his topological structure.
The dynamic electric voltage recovery device method of work of the intersection power taking of the present embodiment is as follows：
When the voltage of first paragraph bus and second segment bus is normal, bus connection switch Q3 disconnects, the first service entrance switch Q1 and the
Two service entrance switch Q2 are closed, and the switching switch Q4 is disconnected, and the first output switch Q5, the second output switch Q6 is closed
Close.First dynamic electric voltage recovery device 1 and second dynamic electric voltage recovery device 2 intersect power taking, normal operation.
When first paragraph bus dead electricity, when second segment bus is normal, bus connection switch Q3 closures, the first service entrance switch Q1 disconnects,
Second service entrance switch Q2 is closed, and the first load and the second load are by second segment bussed supply, and the switching switchs Q4 and described
First output switch Q5 is closed, and the second output switch Q6 disconnects, and second dynamic electric voltage recovery device 2 is out of service, institute
The first normally operation of dynamic electric voltage recovery device 1 is stated, voltage compensating function when single busbar is powered is realized.
When second segment bus dead electricity, when first paragraph bus is normal, bus connection switch Q3 closures, the second service entrance switch Q2 disconnects,
First service entrance switch Q1 is closed, and the first load and the second load are by first paragraph bussed supply, and the switching switchs Q4 and described
Second output switch Q6 is closed, and the first output switch Q5 disconnects, and first dynamic electric voltage recovery device 1 is out of service, institute
The second normally operation of dynamic electric voltage recovery device 2 is stated, voltage compensating function when single busbar is powered is realized.
Industry spot is typically double section bussed supplies, and the situation of Voltage Drop occurs simultaneously for double sections of buses seldom, this
Invention is by setting two sets of dynamic electric voltage recovery devices and using way to take power is intersected, can solve the alternating current of wherein one section bus
The problem of DC energy storage circuit voltage falls in caused DVR when pressure is fallen, not only cost is low and simple in construction by the present invention,
It is reliable and stable.The dynamic electric voltage recovery device disclosed by the invention for intersecting power taking is applicable not only to the DVR of middle low power, is also suitable
In high-power, extra heavy DVR, DVR use scope is expanded.
Above-mentioned specific embodiment is only presently preferred embodiments of the present invention, for being explained in detail to the present invention, and is not
Limitation of the present invention, one of ordinary skill in the art obviously can be according to present disclosure to embodiment
Make various equivalent modifications, variations and alternatives, these equivalent modifications, variations and alternatives should all belong to protection scope of the present invention.
Protection scope of the present invention is defined by the description of this case claims.
Claims (10)
1. a kind of dynamic electric voltage recovery device for intersecting power taking, it is characterised in that：Described dynamic electric voltage recovery device includes two
Nested structure identical dynamic electric voltage recovery device, respectively the first dynamic electric voltage recovery device and the second dynamic electric voltage recovery device, it is described
Two sets of dynamic electric voltage recovery devices be respectively arranged on corresponding first paragraph bus and the first service entrance switch and second segment bus and second
Between service entrance switch, meanwhile, the input of first dynamic electric voltage recovery device is connected to the second service entrance switch provided with line
Output end, the input of second dynamic electric voltage recovery device is connected to the output end of the first service entrance switch provided with line.
2. a kind of dynamic electric voltage recovery device for intersecting power taking according to claim 1, it is characterised in that：Described dynamic
Voltage restorer is opened including converter cell, filter inductance unit, filter capacitor unit, coupling transformer unit, quick bypass
Unit, the first inspection switch, the second inspection switch and bypass inspection switch are closed, described first paragraph bus and second segment bus are logical
Cross bus connection switch connection.
3. a kind of dynamic electric voltage recovery device for intersecting power taking according to claim 2, it is characterised in that：Described change
Flowing device unit includes output inverter circuit, DC energy storage circuit and input rectification circuit, and the input of the converter cell is made
For the input of the dynamic electric voltage recovery device, the converter cell has two output ends, wherein one end and the filtered electrical
The input for feeling unit is connected, and the other end is connected with one end of the filter capacitor unit, described filter capacitor unit it is another
One end is connected with the output end of described filter inductance unit, the secondary of the coupling transformer unit and the filter capacitor list
Member is connected in parallel, and the bypass inspection switch is connected in series between service entrance switch and load, the coupling transformer unit
Primary side and the quick by-pass switch unit be connected in parallel rear one end close to service entrance switch by first inspection switch with
Service entrance switch is connected, the close load after being connected in parallel with the quick by-pass switch unit of the primary side of the coupling transformer unit
One end by second inspection switch with load be connected.
4. a kind of dynamic electric voltage recovery device for intersecting power taking according to claim 1, it is characterised in that：Described two sets
Dynamic electric voltage recovery device in converter cell respectively by concentrate share it is DC bus powered.
5. a kind of dynamic electric voltage recovery device for intersecting power taking according to claim 1, it is characterised in that：Described two sets
Dynamic electric voltage recovery device is respectively arranged with output switch and close to corresponding service entrance switch in the output end close to respective bus bars
Output end is by switching switch connection.
6. a kind of dynamic electric voltage recovery device for intersecting power taking according to claim 1, it is characterised in that：Described two sets
Dynamic electric voltage recovery device is respectively equipped with output switch in the output end close to corresponding service entrance switch side, then with corresponding inlet wire
Switch connection, and two output switchs in the side close to service entrance switch by switching switched fabric.
7. intersecting the method for work of the dynamic electric voltage recovery device of power taking in a kind of claim 1~6 described in any one, it is special
Levy and be：Described dynamic electric voltage recovery device includes two nested structure identical dynamic electric voltage recovery devices, the respectively first dynamic
Voltage restorer and the second dynamic electric voltage recovery device, are respectively arranged on corresponding first paragraph bus and the first service entrance switch and second segment
Between bus and the second service entrance switch, meanwhile, the input of first dynamic electric voltage recovery device is connected to second provided with line
The output end of service entrance switch, the input of second dynamic electric voltage recovery device is connected to the defeated of the first service entrance switch provided with line
Go out end, described dynamic electric voltage recovery device includes converter cell, filter inductance unit, filter capacitor unit, coupling transformer
Unit, quick by-pass switch unit, the first inspection switch, the second inspection switch and bypass inspection switch, described first paragraph are female
Line and second segment bus are connected by bus connection switch；When the voltage of first paragraph bus and second segment bus is normal, mother is opened
Shut-off is opened, and the first service entrance switch and the second service entrance switch are closed, described the first dynamic electric voltage recovery device and the second dynamic electric
Voltage recovery device intersects power taking, normal operation.
8. the method for work of the dynamic electric voltage recovery device according to claim 7 for intersecting power taking, it is characterised in that：It is described
It is DC bus powered that converter cell in two sets of dynamic electric voltage recovery device is shared by concentrating respectively, when first paragraph bus loses
Electricity, and second segment bus it is normal when, bus connection switch closure, the first service entrance switch disconnect, the second service entrance switch closure, first load
With the second load by second segment bussed supply, in the first dynamic electric voltage recovery device the output inverter circuit of converter cell and
The input rectification circuit of converter cell is out of service in second dynamic electric voltage recovery device, the output of the second dynamic electric voltage recovery device
The input rectification circuit of inverter circuit and the first dynamic electric voltage recovery device is normally run, and is realized by the single busbar of second segment bus
Voltage compensating function during power supply；When second segment bus dead electricity, and first paragraph bus it is normal when, bus connection switch closure, second enters
Wiretap disconnects, the first service entrance switch closure, and the first load and the second load are by first paragraph bussed supply, the second dynamic electric voltage
The output inverter circuit of restorer and the input rectification circuit of the first dynamic electric voltage recovery device are out of service, and the first dynamic electric voltage is extensive
The output inverter circuit of multiple device and the input rectification circuit of the second dynamic electric voltage recovery device are normally run, and are realized female by first paragraph
The voltage compensating function when single busbar of line is powered.
9. the method for work of the dynamic electric voltage recovery device according to claim 7 for intersecting power taking, it is characterised in that：It is described
Two sets of dynamic electric voltage recovery devices are respectively arranged with output switch in the output end close to respective bus bars and opened close to corresponding inlet wire
The output end of pass is by switching switch connection, when the voltage of first paragraph bus and second segment bus is normal, and bus connection switch breaks
Open, the first service entrance switch and the second service entrance switch are closed, the switching is switched off, the first output switch, the second output are opened
Guan Jun is closed, and the first dynamic electric voltage recovery device and the second dynamic electric voltage recovery device intersect power taking, normal operation；When first paragraph bus
Dead electricity, when second segment bus is normal, bus connection switch closure, the first service entrance switch disconnects, the second service entrance switch closure, the first load
With the second load by second segment bussed supply, the switching switch and the first output switch closure, the second output switch disconnects,
Second dynamic electric voltage recovery device is out of service, and the first dynamic electric voltage recovery device is normally run, and realizes by the list of second segment bus
Voltage compensating function during bussed supply；When second segment bus dead electricity, when first paragraph bus is normal, bus connection switch closure, second
Service entrance switch disconnects, the first service entrance switch closure, and the first load and the second load are by first paragraph bussed supply, and the switching is opened
Close and the second output switch closure, first output switch disconnects, and the first dynamic electric voltage recovery device is out of service, the second dynamic
Voltage restorer is normally run, and realizes voltage compensating function when being powered by the single busbar of first paragraph bus.
10. the method for work of the dynamic electric voltage recovery device according to claim 7 for intersecting power taking, it is characterised in that：Institute
State two sets of dynamic electric voltage recovery devices and be respectively equipped with output switch in the output end close to corresponding service entrance switch side, then with accordingly
Service entrance switch connection, and two output switchs in the side close to service entrance switch by switching switched fabric；When first paragraph bus
With the voltage of second segment bus it is normal when, bus connection switch is disconnected, and the first service entrance switch and the second service entrance switch are closed, described
Switching is switched off, and the first output switch, the second output switch are closed, the first dynamic electric voltage recovery device and the second dynamic electric voltage
Restorer intersects power taking, normal operation；When first paragraph bus dead electricity, when second segment bus is normal, bus connection switch closure, first enters
Wiretap disconnects, the second service entrance switch closure, and the first load and the second load are by second segment bussed supply, the switching switch
With the first output switch closure, the second output switch disconnects, and the second dynamic electric voltage recovery device is out of service, and the first dynamic electric voltage is extensive
Multiple device is normally run, and realizes voltage compensating function when being powered by the single busbar of second segment bus；When second segment bus dead electricity,
When first paragraph bus is normal, bus connection switch closure, the second service entrance switch disconnects, the first service entrance switch closure, the first load and the
Two loads disconnect by first paragraph bussed supply, the switching switch and the second output switch closure, the first output switch, and first
Dynamic electric voltage recovery device is out of service, and the second dynamic electric voltage recovery device is normally run, and realizes by the single busbar of second segment bus
Voltage compensating function during power supply.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109412166A (en) * | 2018-11-13 | 2019-03-01 | 国网江苏省电力有限公司镇江供电分公司 | Dynamic voltage recovery system based on double-bus crossfeed |
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| CN206135419U (en) * | 2016-08-30 | 2017-04-26 | 国网湖北省电力公司宜昌供电公司 | Dynamic voltage restorer based on switch matrix |
| CN206807011U (en) * | 2017-06-23 | 2017-12-26 | 上海能传电气有限公司 | A kind of dynamic electric voltage recovery device for intersecting power taking |
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| CN101403780A (en) * | 2008-11-13 | 2009-04-08 | 中国电力科学研究院 | Laboratory test device and method for dynamic electric voltage recovery device |
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| CN107181262B (en) | 2023-06-09 |
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