CN106505566B - Avoid the control method and system that occurrence of large-area has a power failure after partial electric grid off-the-line - Google Patents
Avoid the control method and system that occurrence of large-area has a power failure after partial electric grid off-the-line Download PDFInfo
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- CN106505566B CN106505566B CN201611186547.0A CN201611186547A CN106505566B CN 106505566 B CN106505566 B CN 106505566B CN 201611186547 A CN201611186547 A CN 201611186547A CN 106505566 B CN106505566 B CN 106505566B
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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
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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
- H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
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Abstract
The control method and system that occurrence of large-area has a power failure after partial electric grid off-the-line are avoided the embodiment of the invention discloses a kind of, the technical issues of FCB for solving conventional elements fired power generating unit has a starting blind area, the caused stability contorting that cannot achieve after partial electric grid off-the-line.The method comprise the steps that the faulting instruction that the interconnection for getting regional power grid and major network breaks down；The off-the-line of regional power grid and external electrical network is carried out by presetting splitting point according to faulting instruction, and the corresponding first FCB policing feature of unit in the regional power grid after starting off-the-line is coordinated in a distant place is controlled by the first order；If first order control fails the corresponding FCB policing feature of unit in the regional power grid after starting off-the-line is coordinated in a distant place or not can be carried out the off-the-line of regional power grid and external electrical network by presetting splitting point, the 2nd FCB policing feature of local unit in off-the-line and starting region power grid is controlled by the second level.
Description
Technical field
The present invention relates to technical field of electric power more particularly to a kind of occurrence of large-area after partial electric grid off-the-line is avoided to have a power failure
Control method and system.
Background technique
Modern interconnected network scale constantly expands, and the runnability of electric system has been significantly increased, has met its people
Economic rapid development.Simultaneously as the expansion of power supply scale, loss will be more huge caused by electric network fault.Electric system
It is generally acknowledged most complicated man-made system, as a network structure, local fault is possible to induce chain reaction, leads to big face
Product has a power failure, and even results in the collapse of entire power grid.How after catastrophe failure occurs for power grid, the model of power failure is reduced to greatest extent
It encloses, reduces power failure scale, be the thorny problem that modern complex large power grid management and running face, presently relevant control method emphasis
Fast quick-recovery after being grid power blackout there is no the control method that occurrence of large-area has a power failure after how avoiding partial electric grid off-the-line.
After partial electric grid and major network off-the-line, since partial electric grid power system capacity is small, isolated island (partial electric grid i.e. after off-the-line)
Interior electric power can not Fast-Balance, the following two kinds situation will occur: for sending end power grid (i.e. before off-the-line partial electric grid toward major network convey
Electric power, as shown in Figure 1), after off-the-line, since electric power can not be sent outside in isolated island, power supply is greater than demand in island, cannot achieve reality
Shi Pingheng will lead to islanded system frequency rapid increase, final to trigger the high week excision hair of power system security stabilization control device
Motor.In island after generator excision, and it may cause power supply deficiency, system frequency decline further triggers electric system peace
Full stabilization control device low cut load eventually leads to occurrence of large-area in island and has a power failure；Receiving end power grid (is led i.e. before off-the-line
Net transmits electric power toward partial electric grid, as shown in Figure 1), after off-the-line, since major network transmits electric power without normal direction isolated island, electric power is supplied in island
Deficiency is answered, cannot achieve Real-time Balancing, will lead to islanded system frequency rapid decrease, the final power system security that triggers stablizes control
Device low cut processed.After the excision of island internal loading, and it may cause power supply surplus, system frequency, which rises, gets over the upper limit, into one
The high week excision generator of step triggering power system security stabilization control device, eventually leads to occurrence of large-area in island and has a power failure.From state
From the point of view of the inside and outside large area blackout occurred already, partial electric grid, with major network off-the-line, is all difficult to keep away under system fault conditions
Large-area power-cuts in isolated network occurs with exempting from.Currently, it is uneven quickly to eliminate Isolated Network System how after partial electric grid and major network off-the-line
Weigh power, realizes power balance in island, reduces power failure scale, avoids large-area power-cuts, there is no correlation theory and control method.Fire
Motor group fast cut-back (Fast Cut Back, FCB) technology, refer to unit in external grid collapses and grid disconnection,
Moment gets rid of whole supplying power for outside loads, and keeps boiler in minimum load operation, maintains the ability of house load operation, power grid
After fault recovery, FCB unit can fast quick-recovery supplying power for outside.
How thermoelectricity FCB technology is extended, realizes the Collaborative Control of unit side and grid side, kept simultaneously surely with reaching
Determine the purpose of one's respective area power grid.The key of the problem is described as follows:
The FCB of conventional elements fired power generating unit can Generator Outlet Switchgear tripping after automatic conversion control model, make it
Station service stable operation can be carried.But when and how itself can not judge whether power grid faces collapse, and
Therefore starting FCB function is merely able to start when generator external failure causes relay protection to be tripped, that is to say, that
There is starting blind area in the FCB of conventional elements fired power generating unit, result in the skill of the stability contorting after cannot achieve partial electric grid off-the-line
Art problem.
Summary of the invention
It is provided in an embodiment of the present invention a kind of to avoid the control method and be that occurrence of large-area has a power failure after partial electric grid off-the-line
There is starting blind area, the caused stabilization that cannot achieve after partial electric grid off-the-line in system, the FCB for solving conventional elements fired power generating unit
The technical issues of control.
It is provided in an embodiment of the present invention a kind of to avoid the control method that occurrence of large-area has a power failure after partial electric grid off-the-line, packet
It includes:
Get the faulting instruction that the interconnection of regional power grid and major network breaks down；
The off-the-line of regional power grid and external electrical network is carried out by presetting splitting point according to faulting instruction, and passes through first order control
The corresponding first FCB policing feature of unit in regional power grid after coordination starting off-the-line in a distant place processed；
If the first order control fail a distant place coordinate starting off-the-line after regional power grid in the corresponding FCB policing feature of unit or
It not can be carried out the off-the-line of regional power grid and external electrical network by presetting splitting point, then off-the-line and starting region controlled by the second level
2nd FCB policing feature of local unit in power grid.
Optionally, if first order control fails the corresponding FCB plan of unit in the regional power grid after starting off-the-line is coordinated in a distant place
It slightly function or not can be carried out the off-the-line of regional power grid and external electrical network by presetting splitting point, then by the second level off-the-line and open
The 2nd FCB policing feature of local unit specifically includes in dynamic regional power grid:
If the first order control fail a distant place coordinate starting off-the-line after regional power grid in the corresponding FCB policing feature of unit or
It not can be carried out the off-the-line of regional power grid and external electrical network by presetting splitting point, then used by the second level and solution is controlled with regard to earth signal
Arrange the 2nd FCB policing feature of local unit in simultaneously starting region power grid.
Optionally, further includes:
Start the first FCB policing feature or the 2nd FCB policing feature to complete, and after making regional power grid stable operation, control
Regional power grid processed restores power supply.
Optionally, the frequency allowed is run with regard to voltage deviation, local unit that earth signal includes local unit operation permission
The power deviation that deviation, local unit operation allow.
Optionally, the actuation time priority and setting valve priority of first order control are all larger than second level control.
It is provided in an embodiment of the present invention a kind of to avoid the control system that occurrence of large-area has a power failure after partial electric grid off-the-line, packet
It includes:
Control device, regional power grid and major network, control device and regional power grid and major network communicate to connect；
Control device includes:
Acquiring unit, the faulting instruction that the interconnection for getting regional power grid and major network breaks down；
Level-one control unit, for carrying out the solution of regional power grid and external electrical network by presetting splitting point according to faulting instruction
Column, and the corresponding first FCB policing feature of unit in the regional power grid after starting off-the-line is coordinated in a distant place is controlled by the first order；
Two-stage control unit, if failing unit pair in the regional power grid after starting off-the-line is coordinated in a distant place for first order control
The FCB policing feature answered not can be carried out the off-the-line of regional power grid and external electrical network by presetting splitting point, then passes through the second level
Control the 2nd FCB policing feature of local unit in off-the-line and starting region power grid.
Optionally, further includes:
Start unit is completed for starting the first FCB policing feature or the 2nd FCB policing feature, and makes regional power grid
After stable operation, control area power system restoration power supply.
Optionally, Two-stage control unit, if failing the region after starting off-the-line is coordinated in a distant place specifically for first order control
The corresponding FCB policing feature of unit or it not can be carried out the off-the-line of regional power grid and external electrical network by presetting splitting point in power grid,
The 2nd FCB policing feature for earth signal being controlled to local unit in off-the-line and starting region power grid is then used by the second level.
Optionally, regional power grid is provided with several conventional power units and several FCB units.
As can be seen from the above technical solutions, the embodiment of the present invention has the advantage that
It is provided in an embodiment of the present invention a kind of to avoid the control method and be that occurrence of large-area has a power failure after partial electric grid off-the-line
System, wherein avoiding the control method that occurrence of large-area has a power failure after partial electric grid off-the-line includes: to get regional power grid and major network
The faulting instruction that interconnection breaks down；The solution of regional power grid and external electrical network is carried out by presetting splitting point according to faulting instruction
Column, and the corresponding first FCB policing feature of unit in the regional power grid after starting off-the-line is coordinated in a distant place is controlled by the first order；If
First order control fails the corresponding FCB policing feature of unit in the regional power grid after starting off-the-line is coordinated in a distant place or passes through default solution
Column point not can be carried out the off-the-line of regional power grid and external electrical network, then is controlled by the second level local in off-the-line and starting region power grid
2nd FCB policing feature of unit.The present embodiment carries out regional power grid and external electrical by default splitting point according to faulting instruction
The off-the-line of net, and the corresponding first FCB strategy of unit in the regional power grid after starting off-the-line is coordinated in a distant place is controlled by the first order
Function；If first order control fails the corresponding FCB policing feature of unit or logical in the regional power grid after starting off-the-line is coordinated in a distant place
Crossing default splitting point not can be carried out the off-the-line of regional power grid and external electrical network, then controls off-the-line and starting region electricity by the second level
2nd FCB policing feature of local unit in net, there is starting blind area in the FCB for solving conventional elements fired power generating unit, caused
The technical issues of stability contorting after cannot achieve partial electric grid off-the-line.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other attached drawings according to these attached drawings.
Fig. 1 is sending end power grid, receiving end power grid schematic diagram；
Fig. 2 is provided in an embodiment of the present invention a kind of to avoid the control method that occurrence of large-area has a power failure after partial electric grid off-the-line
One embodiment flow diagram；
Fig. 3 is provided in an embodiment of the present invention a kind of to avoid the control method that occurrence of large-area has a power failure after partial electric grid off-the-line
One embodiment structural schematic diagram；
Fig. 4 is the station the XX surrounding area electric network composition schematic diagram of No. 6 units of XX power plant；
Fig. 5 to Fig. 8 is application examples schematic diagram.
Specific embodiment
The control method and be that occurrence of large-area has a power failure after partial electric grid off-the-line are avoided the embodiment of the invention provides a kind of
There is starting blind area, the caused stabilization that cannot achieve after partial electric grid off-the-line in system, the FCB for solving conventional elements fired power generating unit
The technical issues of control.
In order to make the invention's purpose, features and advantages of the invention more obvious and easy to understand, below in conjunction with the present invention
Attached drawing in embodiment, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that disclosed below
Embodiment be only a part of the embodiment of the present invention, and not all embodiment.Based on the embodiments of the present invention, this field
Those of ordinary skill's all other embodiment obtained without making creative work, belongs to protection of the present invention
Range.
A kind of the control that occurrence of large-area has a power failure after partial electric grid off-the-line is avoided referring to Fig. 2, provided in an embodiment of the present invention
One embodiment of method processed includes:
201, the faulting instruction that the interconnection of regional power grid and major network breaks down is got；
202, the off-the-line of regional power grid and external electrical network is carried out by presetting splitting point according to faulting instruction, and passes through first
The corresponding first FCB policing feature of unit in regional power grid after grade control distant place coordination starting off-the-line；
If 203, first order control fails the corresponding FCB strategy function of unit in the regional power grid after starting off-the-line is coordinated in a distant place
Can or it not can be carried out the off-the-line of regional power grid and external electrical network by presetting splitting point, then off-the-line is controlled by the second level and start
2nd FCB policing feature of local unit in regional power grid；
If the first order control fail a distant place coordinate starting off-the-line after regional power grid in the corresponding FCB policing feature of unit or
It not can be carried out the off-the-line of regional power grid and external electrical network by presetting splitting point, then used by the second level and solution is controlled with regard to earth signal
Arrange the 2nd FCB policing feature of local unit in simultaneously starting region power grid.
It include that local unit runs the voltage deviation allowed, local unit runs the frequency departure allowed, originally with regard to earth signal
The power deviation that unit operation in ground allows.
204, start the first FCB policing feature or the 2nd FCB policing feature is completed, and make regional power grid stable operation
Afterwards, control area power system restoration power supply.
It is described further below in conjunction with Fig. 2:
Cause partial electric grid with after major network off-the-line to guarantee that catastrophe failure occurs for system, it is steady that partial electric grid can continue safety
Fixed operation.Generally speaking, when the following two kinds emergency occurs for electric system, the stabilized control system of the mentioned technology of the present invention will be moved
Make, to guarantee the safe and stable operation of regional power grid.
1) N-k failure occurs for the interconnection of regional power grid and major network, and regional power grid is forced and major network off-the-line, this time domain electricity
Net power is seriously uneven, and the stable problems such as concussion or frequency anomaly may occur for regional power grid, and it is negative that traditional round cuts machine-cut
The stable control means of lotus are limited, power regulation be it is discrete, regional power grid unbalanced power problem cannot be eliminated quickly, from
And stability region mains frequency, inhibit the concussion of region grid power.At this time using the mentioned control method of the present invention, coordinated control is each
Platform unit, it is stepless rapidly to reduce the total generator output of regional power grid, the effect of an electric braking is played to regional power grid, fastly
Speed eliminates regional power grid imbalance power, guarantees that regional power grid with after major network fault disconnection, can continue safe and stable operation.
2) catastrophe failure occurs for electric system, and asynchronous oscillation that safety stabilization control system measures, electric voltage exception, frequency are different
The trouble-signals such as normal judge that power grid i.e. by unstability, realizes the off-the-line of partial electric grid and faulty grids by presetting splitting point, and lead to
It crosses the regional power grid control technology based on FCB and keeps one's respective area power grid homeostasis, keep part important load, reduce total stop
Electric loss.
FCB technology after present invention extension, is different from the FCB technology of common separate unit fired power generating unit, refers to that electric system is sent out
When life failure very serious leads to partial electric grid and major network off-the-line, partial electric grid is by local fired power generating unit FCB control and far
Two-stage regional power grid stability contorting of the side based on the stable control of PMU information, quickly eliminates off-the-line rear region unbalanced power supply power,
Stability region mains frequency inhibits the concussion of region grid power.Its main control thought is described below:
Firstly, stable control measure are triggered by regional safety stabilizing control system and stability strategy, so that regional power grid
With external electrical network in default splitting point off-the-line, and according to conditions such as power balance difference in the region isolated network formed after off-the-line, far
The related corresponding FCB policing feature of unit in starting region is coordinated by side, together with other units and automatic safety device in region
It waits the quick machine net coordinated control of carry out to stablize the regional power grid, allows to the broad sense starting electricity as next step power system restoration
Source, at faster speed, higher safety realize power system restoration；
Secondly, if causing region security stability control system cannot positive positive motion since power grid accident development is excessively complicated, serious
When making, then it can not issue distant place starting broad sense FCB function and off-the-line presets splitting point, fired power generating unit will be according to in-site collecting at this time
Information (voltage deviation, frequency departure that such as unit operation allows) off-the-line and start the machine FCB function on the spot, guarantee the machine
Included station service stable operation, the kindling material of fast quick-recovery is left for power grid.
The implementation steps of the invention is as follows:
On the basis of conventional FCB to start-up criterion, enabling signal, Starting mode and stability region in terms of all opened up
Exhibition is divided into two-step evolution when movement originates in power grid or unit trip:
First order control, using the safe and stable operation of off-the-line rear region power grid as the control mode of target.It is in the time
Preferential controlled stage on upper and setting valve uses the distant place based on PMU broad sense measuring system by Local Safety and Stability Control System
Signal enabling FCB.The items such as power balance difference in the region isolated network formed after PMU broad sense measuring system elder generation rapid survey off-the-line
Part, then select the related corresponding FCB function of unit in the starting region of a distant place accordingly, together in region other units and safety from
The quick machine net coordinated controls of carry out such as device are moved to stablize the regional power grid.
Second level control carries station service stable operation as the control mode of target using FCB unit.It is in time and
The controlled stage lagged on setting valve, using with regard to earth signal (voltage deviation, the frequency departure, power deviation that such as unit operation allows
Deng) starting FCB, to guarantee that the machine can carry station service stable operation.It should be pointed out that being remained by FCB control
Startup power supply, need to help the process started in advance by route with small power station etc. due to eliminating conventional black starting-up power supply,
Thus the power system restoration time is made to shorten several hours, therefore itself is a more quick startup power supplies, but with first
Grade control is slow more many than still.
Regional power grid control based on FCB technology is based primarily upon the FCB function of fired power generating unit, therefore its control needs to combine
The common progress of FCB control of the control and fired power generating unit of regional power grid.Since fired power generating unit FCB control function is mainly by single machine
Itself detection limit is realized, when FCB unit generator terminal bus disconnects, and forms FCB unit-station service isolated island, due to generator speed
Rapid increase, will lead to FCB logical triggering, and generator quickly reduces power output and governor control is switched to revolving speed controlling party
Formula.Due to FCB unit this control model limit, in regional power grid FCB unit will more difficult automatic trigger FCB logic, because
This needs just to be able to achieve the regional power grid control plan based on broad sense FCB technology with regional power grid stability control equipment (remote control device) cooperation
Slightly；
In order to realize the cooperation of FCB unit Yu stable control, need to measure using the PMU device for being installed in default splitting point
Broad sense FCB regional power grid exchanges situation with the whole trend of outer net, exchanges situation according to the total trend in the instantaneous region of off-the-line, determines
The sequence of movement of FCB unit in region, and the instruction for entering FCB operating condition is issued to FCB unit by remote control device, FCB unit exists
It is connected into after the instruction of FCB operating condition, immediately enters FCB state, generator is pulled up a horse after externally showing as generator pitch quick closing valve
It is switched to rotating speed control mode, unit can stablize unit itself according to rotor speed dynamic regulation pitch aperture to realize at this time
And the purpose of regional power grid.
If the station the XX surrounding area electric network composition of Fig. 4 to Fig. 8, No. 6 units of XX power plant are case:
Power grid is configured with two FCB units, respectively No. 1 unit of No. 6 units of Taishan Electric Power Plant and Zhuhai Power Plant at present, holds
Amount is respectively 1000MW and 700MW.
The station Gui Feng neighboring area load total amount about 938MW in Fig. 4, installation total amount are 4100MW, are typical sending,
Meet the application conditions of broad sense FCB, regional generation power is by Gui Feng --- it is sent out in the double back 500kV sets of lines of Fragrance Hill.According to existing
The stable logic having, when peak perfume (or spice) N-2 failure occurs, Taishan Electric Power Plant will cut criterion according to minimum and fill from 4 total 3200MW
It is executed in the unit of machine and cuts machine operation, but be difficult to pre-control due to crossing the amount of cutting, may cause when value is bigger than normal under regional power grid frequency
Drop causes low-frequency load shedding movement, and value is less than normal, may be not enough to provide enough electric braking effects, cause to send operating condition outside greatly
Generator rotor angle unstability after the generator failure of lower one's respective area.On the other hand, removed unit is Large-scale fire-electricity unit, it is difficult to extensive rapidly
Redoubling net is eliminated in fault of interconnected transmission line so even the region Gui Feng isolated network can successfully keep stable or outer net needs black starting-up
Power can not also provide when supporting and enough send generating capacity outside.
Assuming that peak perfume one loop line, three relative ground circuit, the tripping of 0.1s postpeak perfume (or spice) double loop:
Fig. 5 (a) is to send the former connection that scene is summer big 2100MW outside to cut strategy, and Fig. 5 (b) is summer big 2100MW to send scene outside
The mentioned control method of the present invention simulation result.
Fig. 6 (a) is to send the former connection that scene is winter big 3200MW outside to cut strategy, and Fig. 6 (b) is winter big 3200MW to send scene outside
The mentioned control method of the present invention simulation result.
Fig. 7 (a) is to send the former connection that scene is summer small 3410MW outside to cut strategy, and Fig. 7 (b) is summer small 3410MW to send scene outside
The mentioned control method of the present invention simulation result.
Fig. 8 (a) is to send the former connection that scene is winter small 3535MW outside to cut strategy, and Fig. 8 (b) is winter small 3535MW to send scene outside
The mentioned control method of the present invention simulation result.
By simulation result it is found that under typical operation of power networks scene, the implementation of level-one broad sense FCB control improves original
On the one hand the effect of the stable logic stabilization regional power grid of peak perfume (or spice) N-2 expands on the firm power boundary of sending outside of peak perfume (or spice) N-2 from 3100MW
3500MW or more has been arrived greatly, has reduced the load resection of low-frequency load shedding under each scene, on the other hand due to No. 6 FCB machines of bronze drum
Group is saved from damage, and load up ability when Gui peak regional power grid externally restores has obtained great promotion.The summer is small, winter small mode
Under, former power grid control mode will lead to the neighboring area mains frequency collapse of the station Gui Feng, and power grid loses stabilization, the big face of the regional power grid
Product has a power failure.However, the regional power grid energy immediate stability gets off, using the present invention mentioned control method so as to avoid large area
Power outage occurs.
The present embodiment carries out the off-the-line of regional power grid and external electrical network by presetting splitting point according to faulting instruction, and leads to
Cross the corresponding first FCB policing feature of unit in the regional power grid after starting off-the-line is coordinated in a first order control distant place；If the first order
Control fail in the regional power grid after starting off-the-line is coordinated in a distant place the corresponding FCB policing feature of unit or by default splitting point not
It can be carried out the off-the-line of regional power grid and external electrical network, then local unit in off-the-line and starting region power grid controlled by the second level
2nd FCB policing feature, there is starting blind area in the FCB for solving conventional elements fired power generating unit, caused to cannot achieve local electricity
The technical issues of stability contorting after net off-the-line, solves the problems, such as the frequency stabilization of system after regional power grid and major network off-the-line, keeps away
Having exempted from off-the-line rear region power grid leads to large-area power-cuts because of frequency issues.
A kind of the control that occurrence of large-area has a power failure after partial electric grid off-the-line is avoided referring to Fig. 3, provided in an embodiment of the present invention
One embodiment of system processed includes:
Control device, regional power grid and major network, control device and regional power grid and major network communicate to connect；
Control device includes:
Acquiring unit, the faulting instruction that the interconnection for getting regional power grid and major network breaks down；
Level-one control unit, for carrying out the solution of regional power grid and external electrical network by presetting splitting point according to faulting instruction
Column, and the corresponding first FCB policing feature of unit in the regional power grid after starting off-the-line is coordinated in a distant place is controlled by the first order；
Two-stage control unit, if failing unit pair in the regional power grid after starting off-the-line is coordinated in a distant place for first order control
The FCB policing feature answered not can be carried out the off-the-line of regional power grid and external electrical network by presetting splitting point, then passes through the second level
Control the 2nd FCB policing feature of local unit in off-the-line and starting region power grid.
Optionally, further includes:
Start unit is completed for starting the first FCB policing feature or the 2nd FCB policing feature, and makes regional power grid
After stable operation, control area power system restoration power supply.
Optionally, Two-stage control unit, if failing the region after starting off-the-line is coordinated in a distant place specifically for first order control
The corresponding FCB policing feature of unit or it not can be carried out the off-the-line of regional power grid and external electrical network by presetting splitting point in power grid,
The 2nd FCB policing feature for earth signal being controlled to local unit in off-the-line and starting region power grid is then used by the second level.
Optionally, regional power grid is provided with several conventional power units and several FCB units.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
In several embodiments provided herein, it should be understood that disclosed system, device and method can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the unit
It divides, only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components
It can be combined or can be integrated into another system, or some features can be ignored or not executed.Another point, it is shown or
The mutual coupling, direct-coupling or communication connection discussed can be through some interfaces, the indirect coupling of device or unit
It closes or communicates to connect, can be electrical property, mechanical or other forms.
The unit as illustrated by the separation member may or may not be physically separated, aobvious as unit
The component shown may or may not be physical unit, it can and it is in one place, or may be distributed over multiple
In network unit.It can select some or all of unit therein according to the actual needs to realize the mesh of this embodiment scheme
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, can also be integrated in one unit with two or more units.Above-mentioned integrated list
Member both can take the form of hardware realization, can also realize in the form of software functional units.
If the integrated unit is realized in the form of SFU software functional unit and sells or use as independent product
When, it can store in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially
The all or part of the part that contributes to existing technology or the technical solution can be in the form of software products in other words
It embodies, which is stored in a storage medium, including some instructions are used so that a computer
Equipment (can be personal computer, server or the network equipment etc.) executes the complete of each embodiment the method for the present invention
Portion or part steps.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey
The medium of sequence code.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although referring to before
Stating embodiment, invention is explained in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (9)
1. a kind of avoid the control method that occurrence of large-area has a power failure after partial electric grid off-the-line characterized by comprising
Get the faulting instruction that the interconnection of regional power grid and major network breaks down；
The off-the-line of regional power grid and external electrical network is carried out by presetting splitting point according to faulting instruction, and is controlled far by the first order
The corresponding first FCB policing feature of unit in regional power grid after side's coordination starting off-the-line；
If the first order control fail a distant place coordinate starting off-the-line after regional power grid in the corresponding first FCB policing feature of unit or
It not can be carried out the off-the-line of regional power grid and external electrical network by presetting splitting point, then off-the-line and starting region controlled by the second level
2nd FCB policing feature of local unit in power grid；
The first order control, be using the safe and stable operation of off-the-line rear region power grid as the control mode of target, be in time and
Preferential controlled stage on setting valve uses the distant signal based on PMU broad sense measuring system by Local Safety and Stability Control System
Start FC, the conditions such as power balance difference in the region isolated network formed after PMU broad sense measuring system elder generation rapid survey off-the-line, then evidence
The related corresponding FCB function of unit in this selection distant place starting region, together with other units and automatic safety device in region
The quick machine net coordinated control of carry out is waited to stablize the regional power grid；
Second level control is to carry station service stable operation as the control mode of target using FCB unit, is in time and to adjust
The controlled stage lagged in value, using signal enabling FCB on the spot, to guarantee that the machine can carry station service stable operation.
2. according to claim 1 avoid the control method that occurrence of large-area has a power failure after partial electric grid off-the-line, feature exists
In, if the first order control fail a distant place coordinate starting off-the-line after regional power grid in the corresponding first FCB policing feature of unit or
It not can be carried out the off-the-line of regional power grid and external electrical network by presetting splitting point, then off-the-line and starting region controlled by the second level
The 2nd FCB policing feature of local unit specifically includes in power grid:
If the first order control fail a distant place coordinate starting off-the-line after regional power grid in the corresponding first FCB policing feature of unit or
The off-the-line of regional power grid and external electrical network is not can be carried out by presetting splitting point, then by second level control using with regard to earth signal control
2nd FCB policing feature of local unit in off-the-line processed and starting region power grid.
3. according to claim 2 avoid the control method that occurrence of large-area has a power failure after partial electric grid off-the-line, feature exists
In, further includes:
Start the first FCB policing feature or the 2nd FCB policing feature to complete, and after making regional power grid stable operation, control zone
Domain power system restoration power supply.
4. according to claim 3 avoid the control method that occurrence of large-area has a power failure after partial electric grid off-the-line, feature exists
In including that the operation of local the unit voltage deviation, the local unit that allow run the frequency departure allowed, local unit with regard to earth signal
Run the power deviation allowed.
5. according to claim 4 avoid the control method that occurrence of large-area has a power failure after partial electric grid off-the-line, feature exists
In the actuation time priority and setting valve priority of first order control are all larger than second level control.
6. a kind of avoid the control system that occurrence of large-area has a power failure after partial electric grid off-the-line characterized by comprising
Control device, regional power grid and major network, control device and regional power grid and major network communicate to connect；
Control device includes:
Acquiring unit, the faulting instruction that the interconnection for getting regional power grid and major network breaks down；
Level-one control unit, for the off-the-line of regional power grid and external electrical network to be carried out by presetting splitting point according to faulting instruction,
And the corresponding first FCB policing feature of unit in the regional power grid after starting off-the-line is coordinated in a distant place is controlled by the first order；
Two-stage control unit, if it is corresponding to fail unit in the regional power grid after starting off-the-line is coordinated in a distant place for first order control
First FCB policing feature not can be carried out the off-the-line of regional power grid and external electrical network by presetting splitting point, then passes through the second level
Control the 2nd FCB policing feature of local unit in off-the-line and starting region power grid；
The first order control, be using the safe and stable operation of off-the-line rear region power grid as the control mode of target, be in time and
Preferential controlled stage on setting valve uses the distant signal based on PMU broad sense measuring system by Local Safety and Stability Control System
Start FC, the conditions such as power balance difference in the region isolated network formed after PMU broad sense measuring system elder generation rapid survey off-the-line, then evidence
The related corresponding FCB function of unit in this selection distant place starting region, together with other units and automatic safety device in region
The quick machine net coordinated control of carry out is waited to stablize the regional power grid；
Second level control is to carry station service stable operation as the control mode of target using FCB unit, is in time and to adjust
The controlled stage lagged in value, using signal enabling FCB on the spot, to guarantee that the machine can carry station service stable operation.
7. according to claim 6 avoid the control system that occurrence of large-area has a power failure after partial electric grid off-the-line, feature exists
In, further includes:
Start unit is completed for starting the first FCB policing feature or the 2nd FCB policing feature, and regional power grid is stablized
After operation, control area power system restoration power supply.
8. according to claim 7 avoid the control system that occurrence of large-area has a power failure after partial electric grid off-the-line, feature exists
In Two-stage control unit, if failing unit pair in the regional power grid after starting off-the-line is coordinated in a distant place specifically for first order control
The first FCB policing feature answered not can be carried out the off-the-line of regional power grid and external electrical network by presetting splitting point, then by the
Two-stage control uses the 2nd FCB policing feature with regard to unit local in earth signal control off-the-line and starting region power grid.
9. according to claim 8 avoid the control system that occurrence of large-area has a power failure after partial electric grid off-the-line, feature exists
In regional power grid is provided with several conventional power units and several FCB units.
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| CN109599869B (en) * | 2017-09-30 | 2022-04-19 | 南京南瑞继保电气有限公司 | Method for constructing safety island system based on large unit and large load and stability control method |
| CN112134311B (en) * | 2020-09-15 | 2022-06-14 | 广东电网有限责任公司韶关供电局 | Control method, device, equipment and storage medium for small hydropower station power grid |
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