CN207625288U - A kind of fault disconnection device accessing multiple regional powers suitable for double-bus - Google Patents
A kind of fault disconnection device accessing multiple regional powers suitable for double-bus Download PDFInfo
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- CN207625288U CN207625288U CN201721790008.8U CN201721790008U CN207625288U CN 207625288 U CN207625288 U CN 207625288U CN 201721790008 U CN201721790008 U CN 201721790008U CN 207625288 U CN207625288 U CN 207625288U
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Abstract
The utility model discloses a kind of fault disconnection device accessing multiple regional powers suitable for double-bus, including of ac acquisition plug-in unit, power supply/On-off signal plug-in unit, CPU card, output switch parameter plug-in unit, expansion plugin；The fault disconnection device accesses the three-phase voltage and open delta residual voltage of two groups of busbares, accesses the isolation switch position of the busbar of each regional power, configures more wheel outlets；It realizes that a fault disconnection device meets the off-the-line demand of double-bus access all regions power supply, and is not influenced by method of operation change.
Description
Technical field
The utility model belongs to power system security technical field, and in particular to one kind being suitable for double-bus access multiplely
The fault disconnection device of area's power supply.
Background technology
The grid-connected traditional structure for changing terminal station single supply radial pattern power supply of regional power, to the weight of traditional relay protection
Combined floodgate, prepared auto restart, each section of overcurrent protection cooperation produce influence.If grid power source on-load islet operation after failure removal,
Power supply quality is unreliable, may damage electrical equipment, also jeopardizes the personal safety of service personnel.Therefore on wind-powered electricity generation, photovoltaic and other places
The grid-connected application requirements config failure disconnection device of area's power supply cuts off grid-connected regional power when ensureing grid collapses.Often
The fault disconnection device of rule only accesses one group of busbar three-phase voltage and external open delta residual voltage, when failure causes system electric
When the disappearance of source, by the way that the protection of low pressure off-the-line, the protection of low frequency off-the-line, over-pressed off-the-line that configure are protected, overfrequency off-the-line is protected, zero sequence mistake
Off-the-line protection is pressed to carry out the networking switch of tripping regional power.
Northwest China area scene is resourceful, and generation of electricity by new energy capacity is huge, and regional power is frequently in 110kV voltages
Grade busbar concentrates grid-connected mode.The sides 110kV of 330kV or 220kV substations are mostly double bus scheme, regional power and
Net interconnection is likely located at different busbares, and can change with the busbar position that the change regional power of the method for operation accesses.
In the case of only grid-connected there are one regional power at substation operation initial stage, use the fault disconnection device of a routine can be with
Meet off-the-line demand, but because conventional fault disconnection device only has one group of busbar voltage access capability, external circuit needs root
Voltage switching is carried out according to the busbar position of regional power access.After later stage Enlargement engineering, as new regional power is grid-connected, with
There is the case where being located at different busbares in grid-connected regional power, it is more that conventional fault disconnection device cannot be satisfied double-bus access
The off-the-line demand of a regional power.Traditional processing method is to be further added by the fault disconnection device of a routine, designs circuit needle
To newly-increased conventional fault disconnection device, to carry out include sampling circuit, open entry loop, output circuit, voltage switching circuit changes
It makes.
The problem of conventional solution, is, under the occasion that double-bus accesses multiple regional powers, conventional failure solution
Array apparatus is configured by regional power, rather than presses bus bar configuration, often increases that a regional power is grid-connected just needs to be further added by one newly
Conventional fault disconnection device, this there is, and protective device utilization rate is low, and design Circuit Retrofit heavy workload is unfavorable for later stage expansion
The problems such as building.Newly-increased off-the-line protection screen cabinet can occupy the reserved screen position of Secondary Design room, the reserved screen of general Secondary Design room
Position is limited, and it is grid-connected to cannot be satisfied later stage more regional powers using conventional fault disconnection device.
In substation's first stage of construction, without the grid-connected planning of regional power, or when considering only grid-connected there are one regional power,
The fault disconnection device of a routine generally will not be respectively configured by double-bus.Even if initial stage is respectively configured with one by busbar when designing
Conventional fault disconnection device, when on the one hand only grid-connected there are one regional power in the early stage, only a protective device is effectively thrown
Enter, another protective device is vacant；On the other hand after considering method of operation adjustment, the busbar position of regional power access can occur
Change, conventional fault disconnection device can not adapt to changes of operating modes automatically, and adjustment is moved back and exported in the function throwing of off-the-line protection
Manual intervention is needed, as later stage more regional powers are grid-connected, the workload for exporting adjustment is multiplied, and is unfavorable for O＆M work
Make, is also unfavorable for being incorporated into the power networks for regional power.
Utility model content
The purpose of this utility model is：The case where accessing multiple regional powers for double-bus, provides a kind of novel event
Hinder disconnection device, only configure a fault disconnection device, meets the off-the-line demand of all regions power supply of double-bus access, and energy
The variation for enough adapting to the method for operation, is not influenced by the busbar change in location that regional power accesses, and is not necessarily to manual intervention.For rear
The situation for having more regional powers grid-connected in phase Enlargement engineering, without newly-increased protection screen cabinet, exterior design is only needed for new
Increase regional power to the opening of fault disconnection device, output circuit and carry out small change, fault disconnection dress need not be further added by
It sets, improves the utilization rate of protective device, alleviate O＆M, ensured the grid-connected economic benefit of regional power.
In order to achieve the above objectives, the solution of the utility model is：
A kind of fault disconnection device accessing multiple regional powers suitable for double-bus is applied to double-bus access multiplely
The off-the-line occasion of area's power supply, including power supply/On-off signal plug-in unit, CPU card, of ac acquisition plug-in unit, output switch parameter are inserted
Part, expansion plugin；Wherein, on the other hand power supply/On-off signal plug-in unit acquires on the one hand for powering to fault disconnection device
Signal input needed for fault disconnection device；Of ac acquires the three-phase voltage and open delta zero sequence that plug-in unit acquires two groups of busbares
Voltage is converted to digital signal, is transferred to CPU card；CPU card receives the number letter that of ac acquisition plug-in unit is sent
Number, analog quantity calculating is carried out, receives the signal input that power supply/On-off signal plug-in unit is sent, and utilize these analog quantitys
State and signal input carry out the judgement of double-bus off-the-line protection；The off-the-line that output switch parameter plug-in unit sends CPU card
Order is converted to relay outlet output；Expansion plugin is used to extend signal input and the outlet output of fault disconnection device.
Further, the of ac acquires 8 road voltage channel of plug-in card configuration, wherein 6 road voltage channels press busbar PT bis-
Secondary rated value 100V settings, for accessing two groups of busbar three-phase voltages；Other 2 road voltage channel presses bis- rated values of zero sequence PT
300V is arranged, the external open delta residual voltage for accessing two groups of busbares.
Further, the CPU card configures bilingual row protection, and simulation gauge is carried out for two groups of busbar voltages of access
It calculates, and carries out the protection of low pressure off-the-line, the protection of low frequency off-the-line, over-pressed off-the-line protection, the protection of overfrequency off-the-line, zero sequence overvoltage off-the-line respectively
The logic judgment of protection, the off-the-line relay protective scheme independent operating of two groups of busbares are independent of each other each other.
Further, the power supply/On-off signal plug-in unit is used to access the isolation switch of the busbar of each regional power
Position.The CPU card carries out regional power by the isolation switch position of access and net state self-identifying, establishes area electricity
The mapping relations of source off-the-line outlet and double-bus off-the-line protection act；Specially：CPU card detection and isolation disconnecting link position point,
Conjunction state, automatic identification regional power are to be located at I female or II mother, judge that the off-the-line outlet junctions of regional power are I female off-the-lines
Be closed after protection act or II female off-the-line protection act after be closed, when the busbar isolation switch position of some regional power is complete
When to divide position, it is grid-connected to judge that this area's power supply does not have, the off-the-line outlet of this area's power supply is not closed.
Further, the output switch parameter plug-in card configuration takes turns the outlet of regional power off-the-line more, and provides expansion plugin.Tool
Body is：The multiple off-the-line outlets of output switch parameter plug-in card configuration, expansion plugin flexible configuration, expansible fault disconnection protective device
Signal inputs and outlet the number of output, and accessing multiple regional powers and later stage Enlargement engineering for double-bus has new area
The case where power grid, in the design of external circuit, it is only necessary to the isolation switch position of busbar is carried out for newly-increased regional power
Open entry loop change reconciliation list mouth output circuit change, so that it may with meet increase newly regional power it is grid-connected after off-the-line need
It asks, without being further added by fault disconnection device, there is no any influence to originally grid-connected regional power.
After adopting the above scheme, the utility model has the beneficial effects that：
1) a fault disconnection device realizes the off-the-line function of all regions power supply of double-bus access, significantly improves guarantor
The utilization rate of protection unit saves the reserved screen position of Secondary Design room；
2) automatic identification regional power and net state, do not influenced by changes of operating modes, reduce O＆M；
3) the off-the-line demand after the adaptive later stage more regional powers of Enlargement engineering are grid-connected, without increasing fault disconnection dress
It sets, design circuit change amount is small, facilitates more regional powers grid-connected.
Description of the drawings
Fig. 1 is the plug-in card configuration figure of the utility model fault disconnection device；
Fig. 2 is the typical wiring schematic diagram that double-bus accesses 2 regional powers in power supply system.
Specific implementation mode
Below with reference to attached drawing, the technical solution of the utility model is described in detail.
The utility model provides a kind of fault disconnection device accessing multiple regional powers suitable for double-bus, is suitable for double
Busbar accesses the occasion of multiple regional powers, refering to what is shown in Fig. 1, the fault disconnection device of the utility model includes power supply/switch
Amount input plug-in unit, CPU card, of ac acquisition plug-in unit, output switch parameter plug-in unit, expansion plugin.
The power supply of the fault disconnection device of the utility model/On-off signal plug-in unit is on the one hand for giving fault disconnection device
On the other hand power supply acquires the signal input needed for fault disconnection device, includes the isolation switch of the busbar of each regional power
Position signal；The of ac acquisition plug-in unit of the fault disconnection device of the utility model accesses the external open delta zero of two groups of busbares
Sequence voltage, and two groups of busbar voltage analog signals of acquisition are converted into digital signal, it is transferred to CPU card；This practicality is new
The output switch parameter plug-in unit of the fault disconnection device of type by the off-the-line order that CPU card is sent be converted to relay outlet it is defeated
Go out.
Refering to what is shown in Fig. 2, accessing the system wiring of multiple regional powers for typical 110kV double-bus.The schematic diagram is
330kV Substation Bus Arrangements, transformer medium voltage side are 110kV double bus scheme forms, have 2 regional powers grid-connected, 110kV I
Female three-phase voltage is represented sequentially as Ua1, Ub1, Uc1, and external open delta residual voltage female 110kV I is expressed as U01；
Three-phase voltage female 110kV II is represented sequentially as Ua2, Ub2, Uc2, and external open delta residual voltage female 110kV II indicates
For U02.Fig. 2 is only a kind of example, indicates that 330kV substations medium voltage side is the feelings that 110kV double-bus accesses multiple regional powers
Condition, other as 220kV substations 110kV double-bus access multiple regional powers the case where or other voltage class double-bus
The case where accessing multiple regional powers is similar.
The typical wiring of 2 regional powers, the fault disconnection of the utility model are accessed for double-bus in Fig. 2 power supply systems
The of ac acquisition plug-in unit of device accesses two groups of busbar three-phase voltage Ua1, Ub1, Uc1, Ua2, Ub2, Uc2 and 2 external openings
Triangle residual voltage U01, U02；The power supply of the fault disconnection device of the utility model/On-off signal plug-in unit accesses regional power
1, I mother of regional power 2, II female isolation switch position；The amount of the outputing output inserter needle of the fault disconnection device of the utility model
Off-the-line outlet junctions are respectively configured to regional power 1, regional power 2.
The CPU card of the fault disconnection device of the utility model receives the number letter that of ac acquisition plug-in unit is sent
Number, analog quantity calculating is carried out, carrying out bilingual row protection using these analog signals judges, is calculated in real time in each interruption every
Group busbar voltage and frequency situation, carry out include low frequency, low pressure, overfrequency, overvoltage, zero sequence overvoltage logic judgment.Two groups
The off-the-line relay protective scheme independent operating of busbar is independent of each other each other.When any group of busbar voltage or frequency meet relay protective scheme
Afterwards, this group of busbar off-the-line order is only sent out.Citing such as I female electric voltage exception, meets low voltage logic, II female voltage, frequency are all just
Often, then the fault disconnection device of the utility model only sends out I female low pressure off-the-line actuating signal.
The CPU card of the fault disconnection device of the utility model carries out regional power by the isolation switch position of access
And net state self-identifying, the mapping relations of regional power off-the-line outlet and double-bus off-the-line protection act are established, according to busbar solution
Row protection signal sends off-the-line order to the regional power of the abnormal busbar of access.
For Fig. 2 wiring, the I of regional power 1 female isolation switch position is named as 11, II female isolation of regional power 1
Disconnecting link position is named as 12；The female isolation switch of the I of regional power 2 position is named as 21, II female isolation switch position of regional power 2
It sets and is named as 22 (which regional power first digit indicates：1 indicates that regional power 1,2 indicates regional power 2；Second
Digital representation accesses busbar position：1 indicates that access I is female, 2 expression accesses II are female)；Illustrate lower 2 regional powers of each method of operation
Off-the-line outlet and the mapping relations of bilingual row protection when positioned at different busbares is as shown in the table：
1 regional power off-the-line of table exports the mapping relations with bilingual row protection
The output switch parameter plug-in card configuration of the fault disconnection device of the utility model takes turns the outlet of regional power off-the-line more, for
Later stage extends the situation for having new regional power grid-connected, need to only increase the power supply of fault disconnection device/On-off signal plug-in unit
The isolation switch position of the busbar of newly-increased regional power, the off-the-line outlet that the distribution of output switch parameter plug-in unit increases regional power newly connect
Point, you can meet the off-the-line demand after increasing regional power newly.For Fig. 2 typical wirings, newly-increased regional power of illustrating is grid-connected, will be new
The isolation switch position for increasing the busbar of regional power is respectively defined as the female isolation switch of power supply 3 I and opens into, the female isolation knife of power supply 3 II
Lock is opened into the off-the-line that any one not used contact of output switch parameter plug-in unit is defined as to newly-increased regional power exports, so that it may with
Realize the off-the-line function after newly-increased regional power is grid-connected.When power supply/On-off signal plug-in unit or output switch parameter plug-in unit be not standby
When with contact, fault disconnection device can be exported by configuring expansion plugin to extend signal input and outlet, meet newly-increased area
Off-the-line demand after power supply, external loop only relate to simply to open into, output adjustment, facilitate grid-connected the connecing of later stage more regional powers
Enter, and grid-connected regional power does not have any influence.
To sum up, the fault disconnection device of the utility model may be implemented in the occasion that double-bus accesses multiple regional powers, when
Power supply system break down after to the off-the-line function of all regions power supply of access, the shadow not changed by system operation mode
It rings, does not need manual intervention, the off-the-line demand after the adaptive newly-increased regional power of off-the-line protection is grid-connected, hardware configuration is taken turns out more
Mouthful, extension is flexible, it is only necessary to configure a fault disconnection device, so that it may to realize the solution of all regions power supply of double-bus access
Row function.
Above example is only to illustrate the technological thought of the utility model, and the protection model of the utility model cannot be limited with this
Enclose, it is every according to the utility model proposes technological thought, any change done on the basis of technical solution each falls within this reality
Within the scope of novel protected.
Claims (5)
1. a kind of fault disconnection device accessing multiple regional powers suitable for double-bus, it is characterised in that：Including power supply/switch
Amount input plug-in unit, CPU card, of ac acquisition plug-in unit, output switch parameter plug-in unit, expansion plugin；Wherein：
Power supply/On-off signal plug-in unit：On the one hand for powering to fault disconnection device, fault disconnection device is on the other hand acquired
Required signal input；
Of ac acquires plug-in unit：The three-phase voltage and open delta residual voltage for acquiring two groups of busbares, are converted to digital signal, pass
It is defeated by CPU card；
CPU card：The digital signal that of ac acquisition plug-in unit is sent is received, analog quantity calculating is carried out, receives power supply/switch
The signal input that amount input plug-in unit is sent, and carry out sentencing for bilingual row protection using these analog quantity states and signal input
It is disconnected；
Output switch parameter plug-in unit：The off-the-line order that CPU card is sent is converted into relay outlet output；Expansion plugin：
Signal for extending fault disconnection device inputs and outlet output.
2. a kind of fault disconnection device accessing multiple regional powers suitable for double-bus as described in claim 1, feature
It is：The of ac acquisition plug-in unit includes 8 road voltage channel configurations, wherein 6 road voltage channels press bis- rated values of busbar PT
100V is arranged, the three-phase voltage for accessing two groups of busbares；Other 2 road voltage channel is set by bis- rated value 300V of zero sequence PT
It sets, the external open delta residual voltage for accessing two groups of busbares.
3. a kind of fault disconnection device accessing multiple regional powers suitable for double-bus as described in claim 1, feature
It is：The CPU card configures bilingual row protection, carries out protecting comprising low pressure off-the-line respectively for two groups of busbar voltages of access
Shield, the protection of low frequency off-the-line, over-pressed off-the-line is protected, overfrequency off-the-line is protected, the logic judgment of zero sequence overvoltage off-the-line protection, two groups of busbares
Off-the-line relay protective scheme independent operating, be independent of each other each other.
4. a kind of fault disconnection device accessing multiple regional powers suitable for double-bus, feature exist as described in claim 1
In：The power supply/On-off signal plug-in unit accesses the isolation switch position of the busbar of each regional power, and the CPU card is logical
Cross access isolation switch position carry out regional power and net state self-identifying, establish regional power off-the-line outlet and double-bus
The mapping relations of off-the-line protection act.
5. a kind of fault disconnection device accessing multiple regional powers suitable for double-bus, feature exist as described in claim 1
In：The output switch parameter plug-in card configuration takes turns the outlet of regional power off-the-line more, and provides expansion plugin.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721790008.8U CN207625288U (en) | 2017-12-20 | 2017-12-20 | A kind of fault disconnection device accessing multiple regional powers suitable for double-bus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113922365A (en) * | 2021-09-30 | 2022-01-11 | 西安理工大学 | Power grid self-healing circuit and method for multi-split line |
-
2017
- 2017-12-20 CN CN201721790008.8U patent/CN207625288U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113922365A (en) * | 2021-09-30 | 2022-01-11 | 西安理工大学 | Power grid self-healing circuit and method for multi-split line |
| CN113922365B (en) * | 2021-09-30 | 2024-01-30 | 西安理工大学 | Power grid self-healing circuit and method for multiple connecting lines |
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