CN108899880A - A kind of power distribution network partition protecting configuration system based on flexible multimode switch - Google Patents
A kind of power distribution network partition protecting configuration system based on flexible multimode switch Download PDFInfo
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- CN108899880A CN108899880A CN201810544517.5A CN201810544517A CN108899880A CN 108899880 A CN108899880 A CN 108899880A CN 201810544517 A CN201810544517 A CN 201810544517A CN 108899880 A CN108899880 A CN 108899880A
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- 230000002633 protecting effect Effects 0.000 title claims abstract description 36
- 238000005192 partition Methods 0.000 title claims abstract description 27
- 230000001012 protector Effects 0.000 claims abstract description 34
- 239000000203 mixture Substances 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 7
- 230000004888 barrier function Effects 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
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- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/28—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for meshed systems
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Abstract
The embodiment of the present invention provides a kind of power distribution network partition protecting configuration system based on flexible multimode switch, and power distribution network includes：Sequentially connected high voltage AC bus, transformer, middle pressure ac bus, alternating current circuit and flexible multimode switch；Flexible multimode switchs：Inverter, the DC bus for being set to inverter both ends and the DC line being connected with DC bus；Partition protecting configures system：The high voltage AC bus protector for being configured at high voltage AC bus, the middle pressure ac bus protector for being configured at middle pressure ac bus, the AC line protection device for being configured at alternating current circuit, the converter unit protection device for being configured at inverter inside, is configured at the DC bus protector of DC bus and is configured at the DC line protection device of DC line the Protector for transformer for being configured at transformer.The embodiment of the present invention is realized and effectively, is reliably protected to the comprehensive of entire intelligent network distribution by configuring partition protecting to the power distribution network switched based on flexible multimode.
Description
Technical field
The present invention relates to flexible distribution technique fields, and in particular to a kind of power distribution network subregion based on flexible multimode switch
Relaying configuration system.
Background technique
Flexible multimode switch not only has two kinds of shapes of on and off compared with ordinary tap using power electronics new technology
State, and the continuous controllable state of power is increased, the features such as operational mode flexibility switches, control mode is versatile and flexible is had both, it can
The problems such as avoiding power failure caused by ordinary tap grid switching operation, cyclization impact, moreover it is possible to alleviate voltage dip, three-phase imbalance
Phenomenon promotes the equalization of feeder line load distribution and power quality to improve, and the implementation for the following intelligent distribution network provides crucial skill
Art and equipment support.
In order to realize that flexible multimode switchs the safe operation in power distribution network, how safeguard protection is carried out to the power distribution network
It is its key.Compared to regular distribution net, the power distribution network after being mounted with flexible multimode switch include AC system, inverter,
The multiple portions such as direct current system, any a part, which breaks down, may all influence the operational reliability of entire distribution.
The existing relaying configuration scheme for power distribution network is locally protected for power distribution network, can not pass through integration realization pair
The Global Macros configuration of flexible multimode switch and its place distribution network system, to entire intelligent network distribution carry out comprehensively effectively, can
The protection leaned on.
Summary of the invention
In view of above-mentioned analysis, the embodiment of the present invention proposes a kind of power distribution network subregion guarantor based on flexible multimode switch
Configuration system is protected, is locally protected to solve the existing relaying configuration scheme for power distribution network for power distribution network, Wu Fatong
It crosses integration to configure the Global Macros of flexible multimode switch and its place distribution network systems, be had comprehensively to entire intelligent network distribution
The problem of effect, reliable protection.
To achieve the above object, the present invention adopts the following technical scheme that：
First aspect present invention provides a kind of power distribution network partition protecting configuration system based on flexible multimode switch,
The power distribution network includes：Sequentially connected high voltage AC bus, transformer, middle pressure ac bus, alternating current circuit and flexible more shapes
State switch；The flexibility multimode, which switchs, includes：Inverter, the DC bus for being set to the inverter both ends and with it is described straight
Flow the connected DC line of bus；The partition protecting configures system：The high pressure being configured on the high voltage AC bus
Ac bus protector, the Protector for transformer being configured on the transformer are configured on medium pressure ac bus
Pressure ac bus protector, is configured at the inverter inside at the AC line protection device being configured on the alternating current circuit
It converter unit protection device, the DC bus protector being configured on the DC bus and is configured at straight on the DC line
Flow Line protector.
With reference to first aspect, in first aspect first embodiment, the inverter includes：Two inverter submodules
Group and two bridge arm reactors being set between described two inverter submodule groups, the inverter submodule group packet
It includes：Sequentially connected multiple inverter submodules, the alternating current circuit are connected between described two bridge arm reactors.
With reference to first aspect, in first aspect second embodiment, the high voltage AC bus protector includes：High pressure
One end of ac bus ground protection component, the high voltage AC bus ground protection component connects the high voltage AC bus,
Other end ground connection.
With reference to first aspect, in first aspect third embodiment, medium pressure ac bus protector includes：Middle pressure
Ac bus overvoltage protection component, middle pressure ac bus under-voltage protection component and middle pressure ac bus ground protection component,
Medium pressure ac bus overvoltage protection component, middle pressure ac bus under-voltage protection component and middle pressure ac bus ground connection are protected
One end of the series circuit of protecting assembly composition connects medium pressure ac bus, other end ground connection.
With reference to first aspect, in the 4th embodiment of first aspect, the Protector for transformer includes：Transformer overcurrent
Protect component and DC system grounding overcurrent protection assemble；The transformer overcurrent protection component and the transformer series, and
It is set to the high-pressure side of the transformer；The DC system grounding overcurrent protection assemble is set to the ground connection of the transformer
End.
With reference to first aspect, in the 5th embodiment of first aspect, the AC line protection device includes：Alternating current circuit
Overcurrent protection assemble, alternating current circuit differential protection component and alternating current circuit zero-sequence current protection component；The alternating current circuit overcurrent
Protection component is series at the alternating current circuit, and the alternating current circuit differential protection component is in parallel with the alternating current circuit, the friendship
One end of Flow Line zero-sequence current protection component connects alternating current circuit, other end ground connection.
First embodiment with reference to first aspect, in first aspect sixth embodiment, the converter unit protection device packet
It includes：Bridge arm differential protection component, bridge arm overcurrent protection assemble and bridge arm reactance differential protection component, the bridge arm differential protection group
Part is parallel to the both ends of the inverter submodule group, or be parallel to the inverter submodule group and bridge arm reactor composition
The both ends of series circuit, the bridge arm overcurrent protection assemble are series between the inverter submodule group and bridge arm reactor,
The bridge arm reactance differential protection modules in parallel is in the inverter submodule group or the both ends of the bridge arm reactor.
With reference to first aspect, in the 7th embodiment of first aspect, the DC bus protector includes：DC bus
Differential protection component, DC bus low-voltage variation component, DC bus overvoltage protective module and DC bus-bar voltage imbalance are protected
Protecting assembly；The DC bus differential protection component is series at the DC bus, the DC bus low-voltage variation component, straight
Stream bus overvoltage protection component connects institute with the one end for the second series circuit that DC bus-bar voltage unbalance protection component forms
State DC bus, other end ground connection.
With reference to first aspect, in the 8th embodiment of first aspect, the DC line protection device includes：DC line
Differential protection component and DC line overcurrent protection assemble, the DC line differential protection component and the DC line overcurrent
Protection component is series at the DC line.
Technical solution of the present invention at least has the following advantages that compared with prior art：
The embodiment of the invention provides a kind of power distribution network partition protectings based on flexible multimode switch to configure system, distribution
Net includes：Sequentially connected high voltage AC bus, transformer, middle pressure ac bus, alternating current circuit and flexible multimode switch, it is soft
Property multimode switch include：Inverter, the DC bus for being set to inverter both ends and the DC line being connected with DC bus,
Partition protecting configures system by configuring high voltage AC bus protector on high voltage AC bus, configuring transformation on the transformer
Device protector presses ac bus protector on middle pressure ac bus, configures AC line protection on alternating current circuit in configuration
Device configures converter unit protection device, the configuring direct current bus protection device and in DC line on DC bus in inverter inside
Upper configuring direct current line protector realizes the intelligent distribution network coordination optimization partition protecting frame comprising flexible multimode switch
Frame is realized in conjunction with the configuration of conventional distribution network protection and flexible multimode switch internal relaying configuration to the complete of entire intelligent network distribution
It effectively, reliably protects in face.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is a tool of the power distribution network partition protecting configuration system in the embodiment of the present invention based on flexible multimode switch
The exemplary topological diagram of body；
Fig. 2 is the topological diagram of a specific example of power distribution network in the embodiment of the present invention；
Fig. 3 is the topological diagram of another specific example of power distribution network in the embodiment of the present invention；
Fig. 4 is the topological diagram of another specific example of power distribution network in the embodiment of the present invention；
Fig. 5 is that mesohigh of embodiment of the present invention ac bus, transformer, middle pressure ac bus and the protection of alternating current circuit are matched
The topological diagram for the specific example set；
Fig. 6 is the topological diagram of a specific example of the relaying configuration of inverter in the embodiment of the present invention；
Fig. 7 is the topology of a specific example of the relaying configuration of DC bus and DC line in the embodiment of the present invention
Figure；
Fig. 8 is another of the power distribution network partition protecting configuration system in the embodiment of the present invention based on flexible multimode switch
The topological diagram of specific example.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the instructions such as term " center ", "upper", "lower", "inner", "outside"
Orientation or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and simplification is retouched
It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation,
Therefore it is not considered as limiting the invention.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " connected " " connects
Connect " it shall be understood in a broad sense, for example, it may be being fixedly connected, it may be a detachable connection, or be integrally connected；It can be machine
Tool connection, is also possible to be electrically connected；It can be directly connected, can also can also be two indirectly connected through an intermediary
Connection inside element can be wireless connection, be also possible to wired connection.For the ordinary skill in the art,
The concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
As long as in addition, the non-structure each other of technical characteristic involved in invention described below different embodiments
It can be combined with each other at conflict.
The embodiment of the invention provides a kind of power distribution network partition protectings based on flexible multimode switch to configure system, such as schemes
Shown in 1, which mainly includes：Sequentially connected high voltage AC bus 1, transformer 2, middle pressure ac bus 3, alternating current circuit
4 and flexible multimode switch 5.Wherein, which includes：Inverter 6, the direct current for being set to inverter both ends
Bus 7 and the DC line 8 being connected with DC bus 7；The partition protecting of the embodiment of the present invention configures system：It is configured at height
It presses the high voltage AC bus protector 101 on ac bus 1, the Protector for transformer 201 being configured on transformer 2, be configured at
It is middle pressure ac bus 3 on middle pressure ac bus protector 301, be configured on alternating current circuit 4 AC line protection device 401,
It is configured at the converter unit protection device 601 inside inverter 6, the DC bus protector 701 being configured on DC bus 7 and matches
The DC line protection device 801 being placed on DC line 8.
Power distribution network partition protecting provided in an embodiment of the present invention based on flexible multimode switch configures system, by matching
Each region of power grid carries out partition protecting, realizes the intelligent distribution network coordination optimization partition protecting frame comprising flexible multimode switch
Frame is realized in conjunction with the configuration of conventional distribution network protection and flexible multimode switch internal relaying configuration to the complete of entire intelligent network distribution
It effectively, reliably protects in face.
As a kind of specific embodiment, above-mentioned high voltage AC bus is 110kV ac bus, and pressure exchange is female among the above
Line is 10kV ac bus.
As shown in Figures 1 and 2, above-mentioned inverter 6 includes：Two inverter submodule groups 61 and it is set to two changes of current
Two bridge arm reactors 62 between device submodule group 61, inverter submodule group 61 include：Sequentially connected multiple inverters
Submodule SM, above-mentioned alternating current circuit 4 are connected between two bridge arm reactors 62.
As a kind of specific embodiment, as shown in Figures 3 and 4, it is mounted with the power distribution network packet of flexible multimode switch 5
It includes：Three 110kV ac bus (high voltage AC bus 1), three 10kV ac bus (middle pressure ac bus 3), three exchanges
Route 4 and flexible multimode switch 5.Wherein, flexible multimode switch 5 includes：Three inverters, 6, six DC bus 7 and four
DC line 8, each inverter 6 include：Two inverter submodule groups 61 and two bridge arm reactors 62, each inverter
Submodule group 61 includes：Multiple inverter submodule SM.In above-mentioned power distribution network the quantity of each section by way of example only, not
To limit the present invention.
In a preferred embodiment, as shown in figure 5, above-mentioned high voltage AC bus protector 101 includes：High voltage AC bus
One end of ground protection component 1011, the high voltage AC bus ground protection component 1011 connects high voltage AC bus 1, the other end
Ground connection.
In a preferred embodiment, as shown in figure 5, pressure ac bus protector 301 includes among the above：Middle pressure ac bus
Overvoltage protection component 3011, middle pressure ac bus under-voltage protection component 3012 and middle pressure ac bus ground protection component
3013, middle pressure ac bus overvoltage protection component 3011, middle pressure ac bus under-voltage protection component 3012 are exchanged with middle pressure
Ac bus 3, other end ground connection are pressed in one end connection for the series circuit that busbar grounding protects component 3013 to form.Middle pressure exchange
Bus over voltage protection component 3011 and middle pressure ac bus under-voltage protection component 3012 press ac bus 3 in being used to measure
Each phase voltage and electric current, and compared with setting valve, so that pressure ac bus 3 is with the presence or absence of exception in judgement, then by closing
Lock 6 centering of inverter pressure ac bus 3 is protected.
In a preferred embodiment, as shown in figure 5, above-mentioned Protector for transformer 201 includes：Transformer overcurrent protection component
2011 and DC system grounding overcurrent protection assemble 2012.Transformer overcurrent protection component 2011 is connected with transformer 2, and is arranged
In the high-pressure side of transformer 2, by detecting the on high-tension side electric current of transformer 2, can determine whether transformer 2 whether overcurrent, work as judgement
When 2 overcurrent of transformer, transformer can be protected by being latched inverter 6；DC system grounding overcurrent protection assemble
2012 are set to the ground terminal of transformer 2, by the current value of 2 neutral point of measuring transformer, judge transformer whether overcurrent,
When determining transformer overcurrent, transformer is protected by being latched inverter.
In a preferred embodiment, as shown in figure 5, above-mentioned AC line protection device 401 includes：Alternating current circuit overcurrent protection
Component 4011, alternating current circuit differential protection component 4012 and alternating current circuit zero-sequence current protection component 4013.Alternating current circuit overcurrent
Protection component 4011 is series in alternating current circuit 4, by locking inverter 6 to members such as in alternating current circuit 4 reactor and resistance
Part is protected, and makes it not by overcurrent damage；Alternating current circuit differential protection component 4012 is in parallel with alternating current circuit 4, passes through inspection
The voltage or fundamental current difference of route between test cross Flow Line differential protection component 4012, can determine whether the route occurs event
Barrier, to be protected by being latched inverter 6 to alternating current circuit 4；One end of alternating current circuit zero-sequence current protection component 4013
Alternating current circuit 4 is connected, other end ground connection is right by locking inverter 6 by measuring the current value with 4 tie point of alternating current circuit
It is protected alternating current circuit 4.
In a preferred embodiment, as shown in fig. 6, above-mentioned converter unit protection device 601 includes：Bridge arm differential protection component
6011, bridge arm overcurrent protection assemble 6012 and bridge arm reactance differential protection component 6013.Bridge arm differential protection component 6011 is in parallel
In the both ends of inverter submodule group 61, or it is parallel to the series circuit of inverter submodule group 61 and the composition of bridge arm reactor 62
Both ends can be sentenced by detecting the voltage or fundamental current difference of route between two neighboring bridge arm differential protection component 6011
Whether the route that breaks breaks down, to be protected by being latched inverter 6；Bridge arm overcurrent protection assemble 6012, which is series at, to be changed
It flows between device submodule group 61 and bridge arm reactor 62, for detecting the electric current inside inverter 6, judges whether it is overcurrent,
When being determined as overcurrent, protected by being latched inverter 6；Bridge arm reactance differential protection component 6013 is parallel to bridge arm electricity
The both ends of anti-device 62 or inverter submodule group 61, by detecting line between two neighboring bridge arm reactance differential protection component 6013
The voltage or fundamental current difference on road, can determine whether the route breaks down, to be protected by being latched inverter 6.
In a preferred embodiment, as shown in fig. 7, above-mentioned DC bus protector 701 includes：DC bus differential protection
Component 7011, DC bus low-voltage variation component 7012, DC bus overvoltage protective module 7013 and DC bus-bar voltage are uneven
Weighing apparatus protection component 7014.DC bus differential protection component 7011 is series at DC bus 7, by detecting the differential guarantor of DC bus
The fundamental current difference of route, can determine whether the route breaks down between protecting assembly 7011, to pass through locking inverter 6
DC bus 7 is protected；DC bus low-voltage variation component 7012, DC bus overvoltage protective module 7013 and direct current are female
The one end for the second series circuit that line voltage unbalance protection component 7014 forms connects DC bus 7, and other end ground connection is used for
The voltage and current of DC bus 7 is measured, and compared with setting valve, so that it is abnormal to judge that DC bus 7 whether there is, then
Low-voltage variation, overvoltage protection or Voltage unbalance is carried out to DC bus 7 by locking inverter 6 to protect.
In a preferred embodiment, as shown in fig. 7, above-mentioned DC line protection device 801 includes：DC line differential protection
Component 8011 and DC line overcurrent protection assemble 8012.DC line differential protection component 8011 is series at DC line 8, leads to
The fundamental current difference for crossing route between detection DC line differential protection component 8011, can determine whether the route occurs event
Barrier, to be protected by being latched inverter 6 to DC line 8；DC line overcurrent protection assemble 8012 is series at direct current
Route 8 judges whether it is overcurrent, when being determined as overcurrent, is changed by locking for detecting the electric current on DC line 8
Stream device 6 protects DC line 8.
It should be noted that each protector and such as Fig. 5, Fig. 6 and protection component shown in Fig. 7 as shown in Figure 1 are set
Seated position (protection measurements) is a signal, in the specific implementation, as shown in figure 8, ac bus protection is located at a, b, c, d, e
With the region f, for protecting flexible multimode to switch high, the middle pressure ac bus that each end is connected；Tranformer protection be located at g, h and
The region i, for protecting the transformer between each high, middle pressure ac bus；AC line protection is located at the region j, k and l, for protecting
Each end is switched with flexible multimode and alternating current circuit that each ac bus is connected；The region converter unit protection m, n and o, for protecting
Flexible multimode switchs the inverter of interior upper and lower bridge arm reactance and submodule group composition；DC bus protection is located at p, q, r, s, t
With the region u, for protect flexible multimode switch in DC side DC bus；DC line protection is located at the region v, w, x and y,
For protecting each DC line of connection DC bus in flexible multimode switch.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (9)
1. a kind of power distribution network partition protecting based on flexible multimode switch configures system, which is characterized in that the power distribution network packet
It includes：Sequentially connected high voltage AC bus, transformer, middle pressure ac bus, alternating current circuit and flexible multimode switch；
The flexibility multimode, which switchs, includes：Inverter, the DC bus for being set to the inverter both ends and with the direct current
The connected DC line of bus；
The partition protecting configures system：The high voltage AC bus protector that is configured on the high voltage AC bus is matched
The Protector for transformer that is placed on the transformer, the middle pressure ac bus protector being configured on medium pressure ac bus,
The AC line protection device that is configured on the alternating current circuit, the converter unit protection device for being configured at the inverter inside, configuration
In the DC bus protector on the DC bus and the DC line protection device being configured on the DC line.
2. partition protecting according to claim 1 configures system, which is characterized in that the inverter includes：Two changes of current
Device submodule group and two bridge arm reactors being set between described two inverter submodule groups, the inverter submodule
Block group includes：Sequentially connected multiple inverter submodules, the alternating current circuit are connected between described two bridge arm reactors.
3. partition protecting according to claim 1 configures system, which is characterized in that the high voltage AC bus protector packet
It includes：High voltage AC bus ground protection component, one end of the high voltage AC bus ground protection component connect the high pressure and hand over
Flow bus, other end ground connection.
4. partition protecting according to claim 1 configures system, which is characterized in that medium pressure ac bus protector packet
It includes：Middle pressure ac bus overvoltage protection component, middle pressure ac bus under-voltage protection component and middle pressure ac bus ground connection are protected
Protecting assembly, medium pressure ac bus overvoltage protection component, middle pressure ac bus under-voltage protection component exchange mother with middle pressure
One end of the series circuit of line ground protection component composition connects medium pressure ac bus, other end ground connection.
5. partition protecting according to claim 1 configures system, which is characterized in that the Protector for transformer includes：Become
Depressor overcurrent protection assemble and DC system grounding overcurrent protection assemble；
The transformer overcurrent protection component and the transformer series, and it is set to the high-pressure side of the transformer；
The DC system grounding overcurrent protection assemble is set to the ground terminal of the transformer.
6. partition protecting according to claim 1 configures system, which is characterized in that the AC line protection device includes：
Alternating current circuit overcurrent protection assemble, alternating current circuit differential protection component and alternating current circuit zero-sequence current protection component；
The alternating current circuit overcurrent protection assemble is series at the alternating current circuit, the alternating current circuit differential protection component with it is described
Alternating current circuit is in parallel, and one end of the alternating current circuit zero-sequence current protection component connects alternating current circuit, other end ground connection.
7. partition protecting according to claim 2 configures system, which is characterized in that the converter unit protection device includes：Bridge
Arm differential protection component, bridge arm overcurrent protection assemble and bridge arm reactance differential protection component；
The bridge arm differential protection modules in parallel is in the both ends of the inverter submodule group, or is parallel to the inverter submodule
The both ends of the series circuit of block group and bridge arm reactor composition, the bridge arm overcurrent protection assemble are series at the inverter submodule
Between block group and bridge arm reactor, the bridge arm reactance differential protection modules in parallel is in the inverter submodule group or the bridge
The both ends of arm reactor.
8. partition protecting according to claim 1 configures system, which is characterized in that the DC bus protector includes：
DC bus differential protection component, DC bus low-voltage variation component, DC bus overvoltage protective module and DC bus-bar voltage
Unbalance protection component；
The DC bus differential protection component is series at the DC bus, the DC bus low-voltage variation component, direct current
Described in the one end for the second series circuit that bus overvoltage protection component is formed with DC bus-bar voltage unbalance protection component connects
DC bus, other end ground connection.
9. partition protecting according to claim 1 configures system, which is characterized in that the DC line protection device includes：
DC line differential protection component and DC line overcurrent protection assemble, the DC line differential protection component and the direct current
Route overcurrent protection assemble is series at the DC line.
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| CN201810544517.5A CN108899880A (en) | 2018-05-31 | 2018-05-31 | A kind of power distribution network partition protecting configuration system based on flexible multimode switch |
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2018
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