CN108306330A - The method that governor black starting-up is utilized under power station isolated power grid linkage and net state - Google Patents
The method that governor black starting-up is utilized under power station isolated power grid linkage and net state Download PDFInfo
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- CN108306330A CN108306330A CN201711465999.7A CN201711465999A CN108306330A CN 108306330 A CN108306330 A CN 108306330A CN 201711465999 A CN201711465999 A CN 201711465999A CN 108306330 A CN108306330 A CN 108306330A
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- governor
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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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses the methods that governor black starting-up is utilized under a kind of linkage of power station isolated power grid and net state; pass through the ability of governor booting, shutdown operation and adjusting under the conditions of verification experimental verification black starting-up; under black starting-up operating environment; two or more generator startups are generated electricity by way of merging two or more grid systems; the governor operating mode of wherein one unit is located at " aperture pattern " and undertakes the main loads under isolated network with big load, and the governor operating mode of another unit is located at " frequency mode " and undertakes frequency modulation under isolated network, pressure regulation with Smaller load.Governor is changed under corresponding operating mode and is run by application method through the invention, and the load fluctuation of power grid reduces, and frequency is basicly stable, greatly strengthens the stability of the unit operation in isolated network, while also ensuring the stabilization of power grid.
Description
Technical field
The present invention relates to technical field of power generation, more particularly to tune is utilized under a kind of power station isolated power grid linkage and net state
The method of fast device black starting-up.
Background technology
Black starting-up booting be electric system mutation emergency measure important content, it is therefore intended that whole system mutate or
After forced shutdown, system all power failures do not depend on other power grid and help, opened certainly by having in system in complete " black " state
The generating set of kinetic force starts, and drives without the generating set from the ability that opens, the recovery of system is gradually expanded.The black of power station opens
Dynamic refers in the case of no station-service alternating current；Merely with the straight-flow system and governor forced oil device of power plant's storage, machine is completed
Group self-starting, internally restores station service, restores operation of power networks to fit on dispatching of power netwoks.Unit has the function of that black starting-up is not only
It keeps the safety in production the needs that the requisite measure saved oneself and system resume operation in full factory's dead electricity in power station.
Hydroelectric units black start-up refers to utilizing Hydropower Unit in the case where station-service alternating current disappears and inlet gate is opened
The characteristics of complete unit self-starting, or using hydroelectric power plant (stand) emergency auxiliary power (such as diesel-driven generator) unlatching inlet gate
And restore the station-service alternating current of one or more unit, the startup of unit is then completed, pressure is built, restores station-service alternating current and right
Fit on scheduling restores grid transmission.
Under normal circumstances, for power station governor in band " station service or isolated network " operation, operating mode is still located at " aperture mould
It is run under formula " or " frequency mode ", by institute's band isolated network small scale, load fluctuation is big, and frequency is difficult to stablize, Chang Shige substations
10kV, 35kV outlet second protection " low-frequency load reduction " action, distribution network outlet switch tripping, make electricity consumer dead electricity again,
It causes damages.Meanwhile leading to generator also removal of load therewith, cause the small-scale oscillation of isolated network.
Invention content
In view of this, the object of the present invention is to provide utilize governor under a kind of linkage of power station isolated power grid and net state
The method of black starting-up.It can avoid the problem that existing operating method exists, significantly reduce the risk of black starting-up, greatly enhance
The stability of unit operation in isolated network, while also ensuring the stable operation of power grid.
The purpose of the present invention is what is be achieved through the following technical solutions：
Pass through the ability of governor booting, shutdown operation and adjusting under the conditions of verification experimental verification black starting-up；It is operated in black starting-up
Under environment, two or more generator startups are generated electricity by way of merging two or more grid systems, wherein the governor operating mode of a unit is located at " aperture pattern " band greatly
Load undertakes the main loads under isolated network, and the governor operating mode of another unit is located at " frequency mode " band Smaller load and undertakes isolated network
Under frequency modulation, pressure regulation.
Further, further include carrying out unit failure low oil pressure by the black start-up ability of experiment oil gear and shutting down guarantor
The calibration of shield experiment and oil pressure and oil level characteristic value.
Further, the black start-up ability of verification experimental verification oil gear includes：(1) unit failure low oil pressure stoppage protection tries
It tests：I.e. normal in unit ac power power supply, booting to idle condition, excision governor oil pressure device switch board is handed over
Mobilization force power supply, oil pump, manually adjust pressure oil tank oil pressure arrive accident low oil pressure working value, record unit failure low oil pressure export and
Compressor emergency shutdown process；(2) calibration of oil pressure and oil level characteristic value：Oil gear oil pump is cut off, the booting of unit is executed, shuts down
And the oil pressure and oil level value of on-load operation test record pressure oil tank, determine the oil pressure oil level characteristic value of test unit black starting-up.
Further, meet following precondition when the application method application：1) Hydropower Plant and grid disconnection band factory
Electricity consumption generator operation；2) electric system big net off-the-line subregion is at isolated power grid, more than two, power station unit power generation band isolated network
Operation.
The beneficial effects of the invention are as follows：
Governor is changed under corresponding operating mode and is run by application method through the invention, and the load fluctuation of power grid reduces, frequency
Rate is basicly stable, reduces power-off time, greatly strengthens the stability of the unit operation in isolated network, while also ensuring power grid
Stabilization.
Other advantages, target and the feature of the present invention will be illustrated in the following description to a certain extent, and
And to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, Huo Zheke
To be instructed from the practice of the present invention.The target and other advantages of the present invention can be wanted by following specification and right
Book is sought to realize and obtain.
Description of the drawings
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
The detailed description of one step, wherein：
Attached drawing 1 is great Hua water main electrical wiring diagram figures；(1B, 2B represent #1, #2 main transformer in figure, and 1F, 2F represent #
1, #2 generating sets.)
Specific implementation mode
Hereinafter reference will be made to the drawings, and the preferred embodiment of the present invention is described in detail.It should be appreciated that preferred embodiment
Only for illustrating the present invention, the protection domain being not intended to be limiting of the invention.
Enforcement place：Guizhou Province Duyun City great Hua water power station
Fig. 1 is great Hua water main electrical wiring diagram figures, and great Hua water power station uses FJL-4GAI-PADE2B types complete
Digital industrial personal computer excitation unit, excitation mode can automatically select the excitation of excitation power supply or residual voltage excitation mode, computer are receiving
Start automatic excitation program by the given voltage being previously set after to excitation order, when set end voltage is less than the 10% of rated voltage
Excitation unit should be automatically engaged, excitation is carried out to generator.Excitation is returned after set end voltage is more than 10% rated voltage or excitation 10s
Road is cut off automatically, and excitation current limit is in 20% (120.4A) open-circuit excitation electric current.It need to only be set before building pressure when stepping up from zero
Given voltage value is determined the 10% of rated voltage, and in black starting-up, there is no problem；
The straight-flow system in great Hua water power station is divided into two groups i.e. switchyard and workshop is spare each other, model HZY2-400Ah
Direct-flow storage battery group.When losing AC power, full factory relies on storage battery power supply, load current to reach 380A, dropped to by battery voltage
It is run up to 4 hours when 90% rated voltage, and power plant's straight-flow system loads about 310A, DCgenerator motor field starting current 120.4A,
It calculates like this, accumulator is enough normal power supply 3 hours；
Computer supervisory control system is powered by UPS, and capacity is 2 × 10kvA, and maximum total load current is about the left sides 2 × 45A
The right side, can the nearly 2h of continuous work under power blackout situation.
Black startup test scheme：
One, black start-up ability verification：
1, under the conditions of verification experimental verification black starting-up governor booting, shutdown operation and adjusting ability；
2, the black start-up ability of verification experimental verification oil gear, including：(1) unit failure low oil pressure stoppage protection is tested：I.e.
Normal in unit ac power power supply, booting to idle condition, excision governor oil pressure device switch board exchange is moved
Power power supply, oil pump adjust pressure oil tank oil pressure to accident low oil pressure working value, the outlet of record unit failure low oil pressure and unit manually
Stopping process；(2) calibration of oil pressure and oil level characteristic value：Oil gear oil pump is cut off, the booting, shutdown and band of unit are executed
The oil pressure and oil level value of load operation test record pressure oil tank determine the oil pressure oil level characteristic value of test unit black starting-up
Two, it is checked before black startup test
#1, #2 machine set outlet switch trip are shut down, and no exchange station service, 220Kv is big, and 209 line accident of good fortune permanently trips,
Power grid is disintegrated comprehensively, emergency diesel generator (200kw), and connecting a cable in its outlet breaker rear end leads to I section of 400V
Busbar.Following work should be performed before starting diesel-driven generator：
1, inspection I section of busbar of diesel-driven generator lead wire and 400V is connect intact, and phase sequence is correct, and outlet breaker disconnects；
2, I section of upper all on-load switch of 400V are disconnected；
3, I II sections of interconnection switches of 400V are disconnected and is pulled to " experiment " position, prepared auto restart is put " cutting "；
4, I section of service entrance switch of 400V is disconnected and is pulled to " experiment " position；
5, such as lower switch is disconnected：The big switch of good fortune 209, the switch of #2 main transformers high-pressure side 212, the switch of #1 main transformers high-pressure side 211, #1
Machine gate out switch 021, #2 machines gate out switch 022,10kvI sections of service entrance switch 110,10kvII sections of service entrance switch 120,10kvI are extremely
II sections of interconnection switches 110；
6, check #2 mechanism take offence cavity of resorption and maintenance shroud without air pressure；
7, it checks that #2 machine excitation systems are normal, has stepping up from zero condition, degaussing switch MK is disconnected；
8,209 circuit of big good fortune, #1, #2 main transformer protection " circuit forever stop jumping machine open into " outside line are removed, loss of exicitation and
Overexcitation protection is cut off, and stepping up from zero is completed when ensureing unit normal operation and station-service Electricity Functional is protected in load.
9, forced oil device oil level is not less than 350mm；Oil pressure is not less than 2.9Mpa；Medium-pressure air compressor system is not less than 3.6Mpa；System
Dynamic low pressure gas system is not less than 0.55Mpa.
Three, black starting-up operating procedure
This test intended starts #2 generating sets, stepping up from zero band #2 main transformers and the normal backward system of big 209 circuits of good fortune of 220kv
Power transmission.
1, start diesel-driven generator, wait for that unit starting is normal, its output is closed after voltage, frequency stabilization and is spaced apart；
2, check that I section of busbar voltage display of 400V is stable and normal；
3, the upper #2 machines pressure oil pumps of I section of 400V, oil leak pump, butterfly valve oil pump controlling cabinet, air compressor machine, sump, factory are closed respectively
The important loads power switches such as room illumination, DC charging device；
4, it checks that #2 machine compressed-oil systems are normal, governor is switched to " machine is manual ", guide vane is fully closed, opens #2 machine water inlet butterflies
Valve；
5, #2 machine technical water supply main valves are opened, it is normal to check that each bearing water pressure supplies water；
6, check that involution normal boot-strap condition meets all trouble-signals of #2 machines；
7, manually opened #2 machines are to " idle running " normal operation；
8, #2 machines gate out switch 022 is closed；
9, #2 main transformers high side switch 212 is closed；
10, it closes the big switch of good fortune circuit 209 band circuit and carries out stepping up from zero；
11, it closes #2 machine degaussing switch MK and stepping up from zero operation is carried out to #2 machines；
12, it selects " stepping up from zero " to press " excitation button " on existing ground adjustment of field excitation cabinet, slowly #2 electromechanics is pressed rise manually
To rated value, notice that stator current must not exceed rated value and three-phase voltage, electric current should balance.Host computer monitors #2 machines generator terminal electricity
13.8kv, 220kv busbar voltage and 209 line voltage distribution of big good fortune are pressed in 226kv normal range (NR)s；
13,10kvII sections of service entrance switch 120 of station service are closed；
14, restore 400vII sections of station services, close 400vII sections of all on-load switches；
15, order is adjusted to pay attention to adjusting #2 machines load, system frequency, voltage in.And it is opened as needed to the application of middle tune
It opens #1 machines to generate electricity by way of merging two or more grid systems, stops diesel-driven generator operation, restore 400vI sections to normal operation.
Wherein, under black starting-up operating environment, when two generator startups are generated electricity by way of merging two or more grid systems, using the user of the present invention
The governor operating mode of wherein one unit is located at " aperture pattern " and undertakes the main loads under isolated network with big load by method, another
The governor operating mode of platform unit is located at " frequency mode " and undertakes frequency modulation under isolated network, pressure regulation with Smaller load.According to test, governor changes
It runs under such conditions；Load fluctuation reduces, and frequency is basicly stable, greatly strengthens the stabilization of the unit operation in isolated network
Property, while also ensuring the stabilization of power grid.
During black starting-up, also need to pay attention to below：
(1) since oil pressure, the oil level by governor forced oil device are influenced, if full factory downtime is long, work as oil level
When dropping to 320mm or less, when forced oil device oil pressure is less than 2.9Mpa, black starting-up can not be actually carried out at this time, it is just necessary
Pressure oil pump is started using external diesel-driven generator, middle compression pump is built and is pressed onto rated value.
(2) success or not of black starting-up is also influenced by straight-flow system.Straight-flow system the operation is stable, voltage is normal, electric power storage
Pond can ensure the normal work of governor, adjuster and protective device and the normal operating of switch.If being calculated by normal condition,
Battery group capacity can meet entry condition, if but power plant's alternating current dead electricity time too long when, the capacity of battery may decline, cause
Make to cannot be satisfied black starting-up requirement.Battery-using time is long, and capacity can decline, then should be I sections by black starting-up power supply 400V
Power supply is sent to 1CF charging units, ensures the normal work of straight-flow system and accumulator；
(3) if water inlet butterfly valve is closed when black starting-up, it must just use external diesel-driven generator to start butterfly valve pressure oil pump and open
Butterfly valve is opened, unit normally could be started to spiral case water-filling；
(4) governor subsection and closed device weight weight 130kg, this weight is because of over-designed, in isolated power grid with electricity
Pressure and frequency fluctuation are big, when making reciprocal " switch " pulling, easily break weight haulage cable.Subsection and closed device weight is subtracted
It gently is changed to 70kg, to ensure stable operation needs.
(5) excitation system charges to long transmission line (209 total track length 30km of big good fortune) in black starting-up, then needs to consider circuit
End overvoltage problem, therefore should use manual excitation, the mode gradually boosted when black starting-up unit band long transmission line excitation.
(6) by institute's band isolated network small scale, load fluctuation is big, and frequency is difficult to stablize, and 10kV, 35kV of Shi Ge substations go out
After the low all protection acts of line, it should be limited with 2000Kw-5000Kw when sending out 10kV, 35kV branch specific electric load again, every 5-10 points
Clock rises progressively load to desirable value, to ensure isolated network and the reliable and stable operation of unit again when isolated network slightly position is stablized.
Finally illustrate, the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although with reference to compared with
Good embodiment describes the invention in detail, it will be understood by those of ordinary skill in the art that, it can be to the skill of the present invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of the technical program, should all be covered in the present invention
Right in.
Claims (4)
1. the method for utilizing governor black starting-up under the linkage of power station isolated power grid and net state, it is characterised in that：Pass through experiment
The ability of governor booting, shutdown operation and adjusting under the conditions of verification black starting-up；Under black starting-up operating environment, two or more are sent out
Electric motor starting generates electricity by way of merging two or more grid systems, wherein the governor operating mode of a unit is located at " aperture pattern " undertakes the master under isolated network with big load
Want load, the governor operating mode of another unit is located at " frequency mode " and undertakes frequency modulation under isolated network, pressure regulation with Smaller load.
2. the method that governor black starting-up is utilized under isolated power grid linkage in power station as described in claim 1 and net state,
It is characterized in that：Further include the black start-up ability by testing oil gear, that is, carries out the experiment of unit failure low oil pressure stoppage protection
With the calibration of oil pressure and oil level characteristic value.
3. the method that governor black starting-up is utilized under isolated power grid linkage in power station as described in claim 1 and net state,
It is characterized in that：The black start-up ability of verification experimental verification oil gear includes：(1) unit failure low oil pressure stoppage protection is tested：Exist
In the case of unit ac power power supply is normal, booting to idle condition cuts off governor oil pressure device switch board ac power
Power supply, oil pump adjust pressure oil tank oil pressure to accident low oil pressure working value manually, and the outlet of record unit failure low oil pressure and unit stop
Machine process；(2) calibration of oil pressure and oil level characteristic value：Oil gear oil pump is cut off, executes the booting of unit, shutdown and with negative
Lotus operates the oil pressure and oil level value of test record pressure oil tank, determines the oil pressure oil level characteristic value of test unit black starting-up.
4. the method that governor black starting-up is utilized under isolated power grid linkage in power station as described in claim 1 and net state,
It is characterized in that：Meet following precondition when the application method application：1) Hydropower Plant is sent out with grid disconnection band station service
Electricity operation；2) electric system big net off-the-line subregion is at isolated power grid, more than two, power station unit power generation band isolated power grid.
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| CN201711465999.7A CN108306330A (en) | 2017-12-28 | 2017-12-28 | The method that governor black starting-up is utilized under power station isolated power grid linkage and net state |
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| CN201711465999.7A CN108306330A (en) | 2017-12-28 | 2017-12-28 | The method that governor black starting-up is utilized under power station isolated power grid linkage and net state |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110176884A (en) * | 2019-06-04 | 2019-08-27 | 贵州清水江水电有限公司 | A kind of the excitation method and relevant apparatus of excitation system |
| CN114094635A (en) * | 2021-11-17 | 2022-02-25 | 广东电网有限责任公司 | Black start system and method for small hydropower microgrid |
| CN114922763A (en) * | 2021-12-30 | 2022-08-19 | 贵州电网有限责任公司 | Onsite calibration method for action curve of main servomotor of hydroelectric generating set |
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| CN101290342A (en) * | 2008-06-17 | 2008-10-22 | 四川中鼎科技有限公司 | Hydroelectric units black start-up ability verification test method |
| CN104505859A (en) * | 2014-12-29 | 2015-04-08 | 吴位跃 | Method for using speed regulators during hydropower station isolated network operation linkage grid-connected power generation |
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| CN101290342A (en) * | 2008-06-17 | 2008-10-22 | 四川中鼎科技有限公司 | Hydroelectric units black start-up ability verification test method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110176884A (en) * | 2019-06-04 | 2019-08-27 | 贵州清水江水电有限公司 | A kind of the excitation method and relevant apparatus of excitation system |
| CN110176884B (en) * | 2019-06-04 | 2021-01-26 | 五凌电力有限公司 | Excitation starting method of excitation system and related device |
| CN114094635A (en) * | 2021-11-17 | 2022-02-25 | 广东电网有限责任公司 | Black start system and method for small hydropower microgrid |
| CN114094635B (en) * | 2021-11-17 | 2023-08-25 | 广东电网有限责任公司 | Black-start system and method for small hydropower micro-grid |
| CN114922763A (en) * | 2021-12-30 | 2022-08-19 | 贵州电网有限责任公司 | Onsite calibration method for action curve of main servomotor of hydroelectric generating set |
| CN114922763B (en) * | 2021-12-30 | 2024-04-05 | 贵州电网有限责任公司 | On-site verification method for action curve of main servomotor of hydroelectric generating set |
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