CN108092312A - The mating interim a whole set of activation system exported under engineering does not complete - Google Patents
The mating interim a whole set of activation system exported under engineering does not complete Download PDFInfo
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- CN108092312A CN108092312A CN201711428273.6A CN201711428273A CN108092312A CN 108092312 A CN108092312 A CN 108092312A CN 201711428273 A CN201711428273 A CN 201711428273A CN 108092312 A CN108092312 A CN 108092312A
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
- G01R31/343—Testing dynamo-electric machines in operation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
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Abstract
Interim a whole set of activation system under not completing the invention discloses mating output engineering.Belong to the interim a whole set of start-up technique field being related to during thermal power generation is built, which can fulfil the electrical complete start-up test of unit and booster stations part test ahead of schedule.Generator, breaker, main transformer, excitation-transformation variable, the change of high pressure factory, the GIS of 500KV and high standby change including being equipped with generator field switch；Breaker includes generator contactor main transformer side pressure change, generator contactor, generator plug-in strip, 101 earthing switch blades and 102 earthing switch blades；One end of generator contactor is connected in the outlet of generator.
Description
Technical field
Interim a whole set of start-up technique field in being built the present invention relates to thermal power generation, and in particular to mating output engineering is not
Interim a whole set of activation system under completion.
Background technology
In the building course of newly-built large-scale thermal power machine group, as the transmission line of electricity of its mating output engineering, it should need
It to complete and go into operation prior to the progress of unit, be that power transmission and the debugging efforts in later stage of unit and a whole set of start service.
And now with the continuous development of science and technology, construction method of installation continuously improve and advanced machine instrument and
The continuous utilization of Large-scale Hoisting equipment, improves production efficiency so that the construction period of Large-scale fire-electricity unit constantly shortens；Together
When, transmission line of electricity is influenced be subject to landform and various factors, possibly can not keep up with the construction progress of unit, in some instances it may even be possible to slow nothing
Method completes the mating operation of transmission line of electricity and unit booster stations, causes the delay of unit duration, can not be it is anticipated that progress is wanted
It asks and completes a series of nodes such as a whole set of startup of unit.
The content of the invention
The present invention is to solve the above problem present in present thermal power generation construction, provide a kind of mating output engineering
Interim a whole set of activation system under not completing, the system can pass through unit in the case where mating submitting circuit does not access power plant
Electrical a whole set of startup method with booster stations, fulfils the electrical complete start-up test of unit and booster stations part test ahead of schedule, reduces
The powered empirical risk of later stage booster stations shortens test period, saves experimentation cost.
More than technical problem is solved by following technical proposal：
The mating interim a whole set of activation system exported under engineering does not complete, the power generation including being equipped with generator field switch
Machine, breaker, main transformer, excitation-transformation variable, the change of high pressure factory, the GIS of 500KV and high standby change；Breaker includes generator contactor main transformer side
Buckling, generator contactor, generator plug-in strip, 101 earthing switch blades and 102 earthing switch blades；One end of generator contactor is connected to hair
In the outlet of motor, the other end of the generator contactor is connected on one end of generator plug-in strip, the generator plug-in strip it is another
End is connected on one end of main transformer, and the other end of main transformer be connected with GIS, and high standby become also is connected with GIS, generator field switch and
Excitation-transformation variable connects, and high pressure factory becomes to be connected with the other end of generator plug-in strip；Generator contactor main transformer side pressure change is connected to generator
On the other end of plug-in strip；One end of generator contactor is also grounded by 101 earthing switch blades, and the other end of generator plug-in strip also passes through
102 earthing switch blades are grounded.
In the case where mating submitting circuit does not access power plant, using electrical complete start-up test side of the unit with booster stations
Other all electrical equipments in booster stations not only including main transformer high side switch, are also all included examination by method expanding test scope
Test scope.
Since mating submitting circuit does not access power plant, all electrical equipments are not related to network system not by electricity in booster stations,
The safety measure for mutually concerning net need not be done, permits without being operated to dispatching of power netwoks application, machine can be increased during normal assays
Group band booster stations stepping up from zero, zero up-flow two are tested, and it is electrically a whole set of to complete unit before mating submitting circuit access power plant
All protections, measurement in firing test and booster stations in addition to route protection, the polarity verifying work of metering device.
This programme fulfils the electrical complete start-up test of unit ahead of schedule by electrical a whole set of startup method of the unit with booster stations
(booster stations are charged, the protection such as voltage circuit verification, bus differential protection, breaker protection, short-line protection school with booster stations part test
Test), the powered empirical risk of later stage booster stations is reduced, shortens test period, saves experimentation cost.
Preferably, the GIS includes voltage transformer, H13 plug-in strips, H3 plug-in strips, H2 switches, H1 plug-in strips, 500KV I mother
Line, H4 plug-in strips, H5 switches, H6 plug-in strips, H7 plug-in strips, H8 switch, H9 plug-in strips, 500KV II busbares, H10 plug-in strips, H11 switches, H12
Plug-in strip, H14 earthing switch blades and H16 earthing switch blades；The other end and voltage transformer of main transformer are all connected to one end of H13 plug-in strips
On, one end of H3 plug-in strips and one end of H4 plug-in strips are all connected on the other end of H13 plug-in strips, and the other end of H3 plug-in strips is connected to H2
On one end of switch, the other end of H2 switches is connected on one end of H1 plug-in strips, and the other end of H1 plug-in strips is connected to 500KV I mothers
On line；The other end of H4 plug-in strips is connected on one end of H5 switches, and the other end of H5 switches is connected on one end of H6 plug-in strips, H6
The other end of plug-in strip is connected on one end of H7 plug-in strips, and the other end of H7 plug-in strips is connected on one end of H8 switches, H8 switches
The other end is connected on one end of H9 plug-in strips, and the other end of H9 plug-in strips and one end of H10 plug-in strips are all connected to 500KV II busbares
On, the other end of H10 plug-in strips is connected on one end of H11 switches, and the other end of H11 switches is connected on one end of H12 plug-in strips,
The other end of H12 plug-in strips is connected with high standby one end become, and the high standby other end become is connected with a cut-off point；H14 earthing switch blades
One end be connected on the other end of H2 switches, the other ends of H14 earthing switch blades ground connection；One end of H16 earthing switch blades is connected to
On the other end of H5 switches, the other end ground connection of H16 earthing switch blades.
Preferably, high pressure factory become include the change of A high pressures factory, A high-voltage switch gears, A stand-by power supplies service entrance switch, B high pressures factory change,
B high-voltage switch gears, B stand-by power supplies service entrance switch and 35KV debugging become；One end that one end and B high pressures factory that A high pressures factory becomes become all connects
It is connected on the other end of generator plug-in strip, the other end that A high pressures factory becomes is connected on one end of A high-voltage switch gears, A high-voltage switch gears
The other end is connected on one end of A stand-by power supply service entrance switch, and the other end that B high pressures factory becomes is connected to one end of B high-voltage switch gears
On, the other end of B high-voltage switch gears is connected on one end of B stand-by power supply service entrance switch, the other end of A stand-by power supply service entrance switch
It is all connected in 35KV debugging changes with the other end of B stand-by power supply service entrance switch.
Preferably, the power end of excitation-transformation variable is connected on a 6KV power switch.
Preferably, the power end of excitation-transformation variable is connected in the outlet of generator.
Preferably, the specific experiment process of interim the whole series activation system is as follows：
(1) AC impedance, power consumption and the insulation resistance of generator amature are measured under steam turbine different rotating speeds；
(2) under rated speed, experiment during generator unit stator winding three-phase short circuit is carried out；
(2.1) three-phase short-circuit characteristic of generator is measured；
One direction adjusts electric current, and by generator secondary current, for 3.85A, 3A, 2A, 1A, 0.5A, these points record respectively
Generator three-phase current, exciting current, excitation voltage and α values measure generator three-phase short-circuit characteristic, first do dropping characteristic, after
Do rising characteristic；Measurement finishes, and generator unit stator electric current is maintained at rated value；
(2.2) checkout facility of generator protection current loop and measuring device；
(2.3) shaft voltage during stator rated current is measured；
(2.4) generator short circuit de-excitation time-constant is measured；
(3) generator band high factory is carried out to be lower zero rising test；
Dynamo current is risen into 600A from 0A points of multiple stages, transform er differential protection is carried out after stablizing and generator is differential
The verification of protection；
(4) under rated speed, experiment when generator unit stator winding three-phase is opened a way；
(4.1) no-load characteristic of generator is measured；
By generator secondary voltage, for 120V, 115V, 110V, 105V, 100V, 90V, 60V, these put to survey during experiment
Amount record generator three-phase voltage, exciting current, excitation voltage and α values；
4.2) checkout facility of generator voltage secondary circuit；
After generator voltage rises to rated value, the amplitude and phase sequence and open delta of inspection generator generator terminal PT secondary voltages
Unbalance voltage value on winding measures the third-harmonic component of generator generator terminal side and neutral point side secondary voltage；
(4.3) shaft voltage under rated voltage is measured；
Stator voltage is kept to be measured to be specified with high internal resistance table during measurement；
(4.4) generator zero load de-excitation time-constant is measured；
(4.5) stator winding residual voltage and phase sequence after generator zero load demagnetization are measured；
Generator generator terminal PT secondary side residual voltages are measured, if its value is smaller, can be measured in primary side；
(5) up-flow is played by the H14 earthing switch blades of 500kV GIS, H15 earthing switch blades zero respectively, verifies generator transformation
Device is protected and the female spill current circuits of II；
Flow up path 1：Generator → generator contactor → main transformer → H13 plug-in strips → H3 plug-in strips → H2 switches → H14 ground connection
Plug-in strip；
Flow up path 2：Generator → generator contactor → main transformer → H13 plug-in strips → H4 plug-in strips → H5 switches → H6 plug-in strips →
H7 plug-in strips → H8 switches → H9 plug-in strips → mother II → H10 plug-in strips → H11 switches → H12 plug-in strips → H15 earthing switch blades；
(6) by high standby low pressure side short circuit zero up-flow when, verification high auxiliary differencial protection and measurement current loop；
Flow up path：Generator → generator contactor → main transformer H13 plug-in strips → H4 plug-in strips → H5 switches → H6 plug-in strips → H7
Standby change → the short dot of plug-in strip → H8 switches → H9 plug-in strips → mother II → H10 plug-in strips → H11 switches → H12 plug-in strips → height；
(7) stepping up from zero is tested；
(7.1) generator band main transformer stepping up from zero；
Pressure build-up test approach is：Generator → generator contactor → main transformer (change of A, B high factory) → main transformer high-pressure side PT；
(7.2) generator band generalized information system stepping up from zero experiment；
Pressure build-up test approach is：Generator → generator contactor → main transformer (change of A, B high factory) → main transformer high-pressure side PT →
5012nd, H8 switches → entire generalized information system；
(7.3) the high standby change stepping up from zero of generator band；
Pressure build-up test approach is：Generator → generator contactor → main transformer (change of A, B high factory) → main transformer high-pressure side PT → H5
Switch → H8 switches → mother II → H11 switches → height is standby to become the standby change of high pressure side pressure change → height；
(8) the excitation control system experiment under generator no-load condition.
The present invention can reach following effect：
In the case where mating submitting circuit does not access power plant, using electrical complete start-up test side of the unit with booster stations
Other all electrical equipments in booster stations not only including main transformer high side switch, are also all included examination by method expanding test scope
Test scope.By electrical a whole set of startup method of the unit with booster stations, the electrical complete start-up test of unit and boosting are fulfiled ahead of schedule
It stands part test (booster stations are charged, the protective calibrations such as voltage circuit verification, bus differential protection, breaker protection, short-line protection), drop
The low powered empirical risk of later stage booster stations shortens test period, saves experimentation cost.
Description of the drawings
Fig. 1 is the present embodiment firing test scope line chart.
Fig. 2 is system primary connection figure before the present embodiment starts.
Fig. 3 is the present embodiment generator short circuit test connection figure.
Fig. 4 is the present embodiment first time rising test wiring diagram.
Fig. 5 is the present embodiment generator no-load test wiring diagram.
Fig. 6 is second of zero up-flow wiring diagram of the present embodiment.
Fig. 7 is zero up-flow wiring diagram of the present embodiment third time.
Fig. 8 is the present embodiment generator band main transformer stepping up from zero test connection figure.
Fig. 9 is the high standby change stepping up from zero test connection figure of the present embodiment generator band.
Figure 10 is the present embodiment adjustment of field excitation test connection figure.
Figure 11 is the interim a whole set of startup time control figure of the present embodiment.
Figure 12 is the formal a whole set of startup time control figure of the present embodiment.
Figure 13 be the present embodiment formally boost start time control figure.
Figure 14 is booster stations startup time control figure after the interim a whole set of startup of the present embodiment.
Specific embodiment
The present invention is further illustrated with embodiment below in conjunction with the accompanying drawings.
Embodiment, the mating interim a whole set of activation system exported under engineering does not complete, shown in Figure 1, certain one phase of power plant
The rated power of generator is 600MW, using three-phase generator terminal become from and excitation mode, generator outlet set breaker, main transformer by
The three-phase transformer composition of one 720MVA/530kV ± 2 × 2.5%/20kV, high pressure factory become 1A, 1B 40MVA/20kV/
6.3kV three-phase two-simulation transformers, excitation become 6500kVA/20kV/0.85kV three-phase transformers, the main guarantor of generator transformer
Shield is protected using GE UR Series Microcomputers, realizes duplicate system retrofit (except non-ionizing energy loss), shunt self excitation adjuster is using auspicious
The serial static excitation systems of scholar ABBUNITROL 5000.
In the work progress of power plant's first stage of the project, since 500kV transmission lines of electricity can not access always, and unit is already
Every monomer and subsystem debugging efforts are completed, possess a whole set of entry condition.In this case, we have proposed interim the whole series
The trial stretch that the whole series start is extended to entire 500kV booster stations so that booster stations are in 500kV by the arrangement and method for construction of startup
Before transmission line of electricity access, fulfil ahead of schedule by electric test and protective calibration work, the preparation carried out therefrom is accessed for later circuit
Work；Cancellation simultaneously and the relevant experiment of power grid continue to complete after being left to circuit access.
Feasibility analysis
(1) interim a whole set of startup and the formal a whole set of difference started
1st, the difference of trial stretch
Table 1：Interim a whole set of startup and the formal a whole set of trial stretch started
We have seen that, difference lies in GIS for interim a whole set of startup and formal complete start-up test scope maximum from upper table 1
This block.For formal a whole set of start, since GIS has been subjected to electricity, entire trial stretch, which can only decide, to be become on high-tension side H2 and opens
It closes and H5 is switched.And for the current interim a whole set of startup of Mr. Yu power plant No.1 unit, except the formal a whole set of experiment model started
It outside enclosing, further includes entire generalized information system and high standby change system, trial stretch has obtained appropriate expansion, can allow generalized information system
And standby change system carries out being tested by electricity in advance, and complete related experiment.
2nd, the difference of content of the test
Table 2：Interim a whole set of startup and the formal a whole set of experiment started
(2) process analysis procedure analysis is tested
For trial stretch, without reducing trial stretch, opposite also expands trial stretch for interim a whole set of startup；From
For content of the test, due to the expansion of trial stretch, it can not originally carry out or the pilot project of more difficult progress can also be able to
It is smoothed out, although can not be carried out with the relevant experiment of power grid, whole experiment process is not influenced, in booster stations from now on by electricity
It carries out afterwards；For empirical risk, since booster stations are not by electricity, without consider with the relevant safety measure of power grid, significantly
Reduce the risk of experiment, while fulfil the part correlation test of booster stations ahead of schedule, can test in advance booster stations by electric energy
The reliability of power and protective device, can also reduce in the future booster stations by the risk of electric test.Therefore it is considered that interim the whole series open
It is feasible when dynamic.
The implementation of countermeasure
(1) firing test scope is determined
Because of project progress reason, during this complete start-up test, 500kVGIS systems are not also by electricity, therefore trial stretch is
Expand, test by electric scope a line chart as shown in Figure 1.
Including being equipped with the generator of generator field switch, breaker, main transformer, excitation-transformation variable, high pressure factory become, the GIS of 500KV
With high standby change；Breaker include generator contactor main transformer side pressure change, generator contactor, generator plug-in strip, 101 earthing switch blades and
102 earthing switch blades；One end of generator contactor is connected in the outlet of generator, and the other end of the generator contactor is connected to hair
On one end of motor plug-in strip, the other end of the generator plug-in strip is connected on one end of main transformer, and the other end and the GIS of main transformer connect
It connects, high standby become also is connected with GIS, and generator field switch is connected with excitation-transformation variable, and high pressure factory becomes the other end with generator plug-in strip
Connection；Generator contactor main transformer side pressure change is connected on the other end of generator plug-in strip；One end of generator contactor also passes through 101
Earthing switch blade is grounded, and the other end of generator plug-in strip is also grounded by 102 earthing switch blades.
The GIS includes voltage transformer, H13 plug-in strips, H3 plug-in strips, H2 switches, H1 plug-in strips, 500KV I busbares, H4 locks
Knife, H5 switches, H6 plug-in strips, H7 plug-in strips, H8 switch, H9 plug-in strips, 500KV II busbares, H10 plug-in strips, H11 switches, H12 plug-in strips,
H14 earthing switch blades and H16 earthing switch blades；The other end and voltage transformer of main transformer are all connected on one end of H13 plug-in strips, H3 locks
One end of knife and one end of H4 plug-in strips are all connected on the other end of H13 plug-in strips, and the other end of H3 plug-in strips is connected to H2 switches
On one end, the other end of H2 switches is connected on one end of H1 plug-in strips, and the other end of H1 plug-in strips is connected on 500KV I busbares；
The other end of H4 plug-in strips is connected on one end of H5 switches, and the other end of H5 switches is connected on one end of H6 plug-in strips, H6 plug-in strips
The other end be connected on one end of H7 plug-in strips, the other ends of H7 plug-in strips is connected on one end of H8 switches, H8 switches it is another
End is connected on one end of H9 plug-in strips, and the other end of H9 plug-in strips and one end of H10 plug-in strips are all connected on 500KV II busbares,
The other end of H10 plug-in strips is connected on one end of H11 switches, and the other end of H11 switches is connected on one end of H12 plug-in strips, H12
The other end of plug-in strip is connected with high standby one end become, and the high standby other end become is connected with a cut-off point；The one of H14 earthing switch blades
End is connected on the other end of H2 switches, the other end ground connection of H14 earthing switch blades；One end of H16 earthing switch blades is connected to H5 and opens
On the other end of pass, the other end ground connection of H16 earthing switch blades.
High pressure factory, which becomes, includes the change of A high pressures factory, A high-voltage switch gears, A stand-by power supplies service entrance switch, the change of B high pressures factory, B high presses off
It closes, B stand-by power supplies service entrance switch and 35KV debugging become；One end that one end and B high pressures factory that A high pressures factory becomes become all is connected to power generation
On the other end of machine plug-in strip, the other end that A high pressures factory becomes is connected on one end of A high-voltage switch gears, and the other end of A high-voltage switch gears connects
It is connected on one end of A stand-by power supply service entrance switch, the other end that B high pressures factory becomes is connected on one end of B high-voltage switch gears, B high pressures
The other end of switch is connected on one end of B stand-by power supply service entrance switch, and the other end and B of A stand-by power supply service entrance switch are spare
The other end of electric power incoming line switch is all connected in 35KV debugging changes.The other end of A high-voltage switch gears be A sections of 6kV, B high-voltage switch gears
The other end be A sections of 6kV.
The power end of excitation-transformation variable is connected on a 6KV power switch.
The power end of excitation-transformation variable is connected in the outlet of generator.
(2) before activation system primary connection figure is as shown in Fig. 2, mating interim the whole series exported under engineering does not complete
The specific experiment process of activation system is as follows：
(1) AC impedance, power consumption and the insulation resistance of generator amature are measured under steam turbine different rotating speeds；
(2) under rated speed, experiment during generator unit stator winding three-phase short circuit is carried out, experiment main electrical scheme is shown in attached drawing 3；
(2.1) three-phase short-circuit characteristic of generator is measured；
One direction adjusts electric current, and by generator secondary current, for 3.85A, 3A, 2A, 1A, 0.5A, these points record respectively
Generator three-phase current, exciting current, excitation voltage and α values measure generator three-phase short-circuit characteristic, first do dropping characteristic, after
Do rising characteristic；Measurement finishes, and generator unit stator electric current is maintained at rated value；
(2.2) checkout facility of generator protection current loop and measuring device；
(2.3) shaft voltage during stator rated current is measured；
(2.4) generator short circuit de-excitation time-constant is measured；
(3) carry out generator band high factory to be lower zero rising test, experiment main electrical scheme is shown in attached drawing 4；
Dynamo current is risen into 600A from 0A points of multiple stages, transform er differential protection is carried out after stablizing and generator is differential
The verification of protection；
(4) under rated speed, experiment when generator unit stator winding three-phase is opened a way, experiment main electrical scheme is shown in attached drawing 5；
(4.1) no-load characteristic of generator is measured；
By generator secondary voltage, for 120V, 115V, 110V, 105V, 100V, 90V, 60V, these put to survey during experiment
Amount record generator three-phase voltage, exciting current, excitation voltage and α values；
4.2) checkout facility of generator voltage secondary circuit；
After generator voltage rises to rated value, the amplitude and phase sequence and open delta of inspection generator generator terminal PT secondary voltages
Unbalance voltage value on winding measures the third-harmonic component of generator generator terminal side and neutral point side secondary voltage；
(4.3) shaft voltage under rated voltage is measured；
Stator voltage is kept to be measured to be specified with high internal resistance table during measurement；
(4.4) generator zero load de-excitation time-constant is measured；
(4.5) stator winding residual voltage and phase sequence after generator zero load demagnetization are measured；
Generator generator terminal PT secondary side residual voltages are measured, if its value is smaller, can be measured in primary side；
(5) up-flow is played by the H14 earthing switch blades of 500kV GIS, H14 earthing switch blades zero respectively, verifies generator transformation
Device is protected and the female spill current circuits of II, system primary connection are adjusted to as shown in Figure 6；Pass through one in the other end of H2 switches
A H14 plug-in strips ground connection, is grounded in the other end of H12 plug-in strips by a H15 plug-in strip.
Flow up path 1：Generator → generator contactor → main transformer → H13 plug-in strips → H3 plug-in strips → H2 switches → H14 ground connection
Plug-in strip；
Flow up path 2：Generator → generator contactor → main transformer → H13 plug-in strips → H4 plug-in strips → H5 switches → H6 plug-in strips →
H7 plug-in strips → H8 switches → H9 plug-in strips → mother II → H10 plug-in strips → H11 switches → H12 plug-in strips → H15 earthing switch blades；
(6) by high standby low pressure side short circuit zero up-flow when, verification high auxiliary differencial protection and measurement current loop,
System primary connection is adjusted to as shown in Figure 7；Another in H15 plug-in strips is terminated with a voltage transformer.
Flow up path：Generator → generator contactor → main transformer H13 plug-in strips → H4 plug-in strips → H5 switches → H6 plug-in strips → H7
Standby change → the short dot of plug-in strip → H8 switches → H9 plug-in strips → mother II → H10 plug-in strips → H11 switches → H12 plug-in strips → height；
(7) stepping up from zero is tested；
(7.1) generator band main transformer stepping up from zero, test connection figure is as shown in Figure 8；
Pressure build-up test approach is：Generator → generator contactor → main transformer (change of A, B high factory) → main transformer high-pressure side PT；
(7.2) generator band generalized information system stepping up from zero experiment；
Pressure build-up test approach is：Generator → generator contactor → main transformer (change of A, B high factory) → main transformer high-pressure side PT →
5012nd, H8 switches → entire generalized information system；
(7.3) the high standby change stepping up from zero of generator band, test connection figure is as shown in Figure 9；In another termination of H15 plug-in strips
There are one voltage transformers.
Pressure build-up test approach is：Generator → generator contactor → main transformer (change of A, B high factory) → main transformer high-pressure side PT → H5
Switch → H8 switches → mother II → H11 switches → height is standby to become the standby change of high pressure side pressure change → height；
(8) the excitation control system experiment under generator no-load condition, test connection figure is as shown in Figure 10.
Comparison
(1), interim a whole set of the advantages of starting
1st, engineering node is timely completed
Using interim a whole set of startup, a whole set of this Important Project node that starts can be enable to smoothly complete on time, it is unlikely
Due to because circuit reason the progress of engineering is made to stagnate.
2nd, the expansion of trial stretch
Under normal circumstances, before a whole set of startup of unit, GIS booster stations should have been completed by electricity, when the whole series start, machine
The trial stretch of group is restricted, until can only accomplishing the on high-tension side 500kV breakers of main transformer.And in certain power plant's No.1 unit
During interim a whole set of startup, transmission line of electricity and GIS booster stations do not complete docking also, i.e., entire GIS booster stations are not also by electricity, this
In the case of, expansion that trial stretch can be appropriate is not only limited to main transformer high-pressure side, more can be using entire GIS booster stations as this
The secondary interim a whole set of trial stretch started.So as to transmission line of electricity completion before, fulfil ahead of schedule GIS booster stations bus differential protection,
The load test of the protections such as stub protection and measuring and controlling equipment works.
3rd, content of the test is more reliable
When circuit is gone into operation, often due to circuit is in light condition at this time, capacitance current during circuit zero load due to by
The influence of line length for shorter cable, only exists the capacitance current of very little, senses the electric current of secondary side with regard to smaller
, to protection and measure and control device progress load test is very inconvenient or even some can not be checked, and can only wait until school after on-load
Core delays the time pinpointed the problems, adds job costs and risk；But during complete start-up test, electric current and electricity
Pressure be all can with adjusting control, protective device verify can with enhanced convenience and reliably.
4th, the controllable of process is tested
4.1 unit 500kV GIS are accessed controllable
Under normal circumstances, unit 500kV GIS accesses need to apply for that the cycle substantially needs a week in advance to scheduling
Left and right, and turn-on time is limited, often the only 2 day time.It is a series of that access, the line inspection, transmission etc. must be completed within this 2 day time
Work, also needs to carry out relevant safety measure, not only be pressed for time, but also risk factor is also high.
In the case of interim a whole set of startup, unit 500kV GIS can be accessed at any time, not only be had plenty of time, Er Qieyou
In booster stations not by electricity, it is not related to network system, without doing relevant safety measure, greatly reduces risk factor.
4.2 units and booster stations start controllable
4.2.1 a whole set of startup of unit is controllable
In normal complete start-up test, every equipment for being related to GIS booster stations systems is required for applying to scheduling,
Then scheduling grant can just operate, and so undoubtedly add the time of complete start-up test.And interim a whole set of startup difference, though
Right pilot project is more, but generalized information system is not also by electricity before the test, the equipment that operate GIS, without to scheduling application license,
The relative test time is shorter.
It is respectively the formal a whole set of startup of unit and the interim a whole set of time control figure started from Figure 11 and Figure 12：
It is can be seen that from Figure 11 and Figure 12 when carrying out relating to net experiment, the time size needed for interim a whole set of startup
In the time needed for formal a whole set of startup.
What 4.2.2 booster stations started is controllable
In interim a whole set of startup, the protection of most of booster stations and the verifying work of measure and control device have been completed.Work as liter
When pressure is stood formally by electricity, the protective device of booster stations only need to simply be resumed classes, and simplify part Experiment content and behaviour
Make step.
Lower Figure 13 and Figure 14 is respectively the time control figure that booster stations start under different situations：
From the graph in 13 and Figure 14, it will be seen that after interim a whole set of startup, booster stations are required when starting
Time is greatly shortened.
4.2.3 overall time compares
Time listed above is counted, draws following table：
| The unit starting time | Booster stations start the time | The follow-up test time | The general test time | |
| Under formal way | 45 it is small when | 14 it is small when | 0 it is small when | 59 it is small when |
| Under temporal fashion | 33.5 when small | 9.5 it is small when | 7 it is small when | 50 it is small when |
From upper table it will be seen that under temporal fashion, although also have some follow-up tests (such as main transformer impact test and
Generator connecting in parallel with system etc.) it needs to carry out, but on the whole, due to eliminating, greatly scheduling is ordered and grid switching operation waits
Time (this part-time is often uncontrollable, may be longer during actual tests) so that overall required debug time obtains
Reduction.
Start since unit is a whole set of and booster stations firing test belongs to large-scale experiment, input man power and material is phase
When huge, the time of or so 9 hours can be saved, can undoubtedly save many costs, company is realized " cost efficiency ",
The target of " three save ", is of great importance.
4.2.4 empirical risk is controllable
During formal complete start-up test, due to booster stations charging operation, so before experiment, it is necessary to carry out phase
The safety and quarantine measures of pass.And in interim a whole set of start-up course, entire booster stations are included in trial stretch also not by electricity
It is interior, without consider with the relevant safety measure of power grid, greatly reduce the risk of experiment.
4.3 booster stations equipment safeties it is controllable
Under normal circumstances, in booster stations start-up course, transmission line of electricity directly impacts booster stations, if CT, PT,
GIS busbares or switch have abnormal conditions, and simultaneously termination test need to be reported to scheduling, tends to cause the damage of equipment, even
It is the expansion of fault coverage.
In interim a whole set of startup, generator band booster stations zero play slowly boosting and rising test, can be to booster stations
New equipment carries out the test of chargeability.If during boosting or up-flow, there are abnormal conditions in equipment, can terminate examination in time
It tests and is checked, prevent the safety of equipment damage, guarantee test personnel and equipment.
5th, it is standby to become the optimization checked
Standby become of the height of certain power plant's first stage of the project is hung on GIS mothers II, high side voltage 500kV, low-pressure side electricity
It presses as 6kV.It is too high to become high-pressure side voltage class since height is standby, when carrying out a flow-through test to high standby change, high voltage side current
It is too small, differential protection loop can not be verified.And interim complete start-up test is employed, can short circuit be set in high standby low pressure side
Point carries out zero rising test to it by generator and verifies, and the differential protection for making high standby change is relatively reliable.
In the case where mating submitting circuit does not access power plant, using electrical complete start-up test side of the unit with booster stations
Other all electrical equipments in booster stations not only including main transformer high side switch, are also all included examination by method expanding test scope
Test scope.
Since mating submitting circuit does not access power plant, all electrical equipments are not related to network system not by electricity in booster stations,
The safety measure for mutually concerning net need not be done, permits without being operated to dispatching of power netwoks application, machine can be increased during normal assays
Group band booster stations stepping up from zero, zero up-flow two are tested, and it is electrically a whole set of to complete unit before mating submitting circuit access power plant
All protections, measurement in firing test and booster stations in addition to route protection, the polarity verifying work of metering device.
The present embodiment is fulfiled ahead of schedule electrical a whole set of start of unit and is tried by electrical a whole set of startup method of the unit with booster stations
Test that (booster stations are charged, the protections such as voltage circuit verification, bus differential protection, breaker protection, short-line protection with booster stations part test
Verification), the powered empirical risk of later stage booster stations is reduced, shortens test period, saves experimentation cost.
Claims (6)
1. the mating interim a whole set of activation system exported under engineering does not complete, which is characterized in that opened including being equipped with generator field
Generator, breaker, main transformer, excitation-transformation variable, the change of high pressure factory, the GIS of 500KV and the high standby change of pass；Breaker is opened including generator
Close main transformer side pressure change, generator contactor, generator plug-in strip, 101 earthing switch blades and 102 earthing switch blades；One end of generator contactor
It is connected in the outlet of generator, the other end of the generator contactor is connected on one end of generator plug-in strip, the generator lock
The other end of knife is connected on one end of main transformer, and the other end of main transformer is connected with GIS, and high standby become also is connected with GIS, generator magnetic
Field switch is connected with excitation-transformation variable, and high pressure factory becomes to be connected with the other end of generator plug-in strip；The side pressure of generator contactor main transformer becomes connection
On the other end of generator plug-in strip；One end of generator contactor also by 101 earthing switch blades be grounded, generator plug-in strip it is another
End is also grounded by 102 earthing switch blades.
2. the mating interim a whole set of activation system exported under engineering does not complete according to claim 1, which is characterized in that institute
Stating GIS includes voltage transformer, H13 plug-in strips, H3 plug-in strips, H2 switches, H1 plug-in strips, 500KV I busbares, H4 plug-in strips, H5 switches, H6
Plug-in strip, H7 plug-in strips, H8 switches, H9 plug-in strips, 500KV II busbares, H10 plug-in strips, H11 switches, H12 plug-in strips, H14 earthing switch blades and
H16 earthing switch blades；The other end and voltage transformer of main transformer are all connected on one end of H13 plug-in strips, one end of H3 plug-in strips and H4
One end of plug-in strip is all connected on the other end of H13 plug-in strips, and the other end of H3 plug-in strips is connected on one end of H2 switches, H2 switches
The other end be connected on one end of H1 plug-in strips, the other end of H1 plug-in strips is connected on 500KV I busbares；The other end of H4 plug-in strips
It is connected on one end of H5 switches, the other end of H5 switches is connected on one end of H6 plug-in strips, and the other end of H6 plug-in strips is connected to
On one end of H7 plug-in strips, the other end of H7 plug-in strips is connected on one end of H8 switches, and the other end of H8 switches is connected to H9 plug-in strips
One end on, the other end of H9 plug-in strips and one end of H10 plug-in strips are all connected on 500KV II busbares, the other end of H10 plug-in strips
Be connected to H11 switch one end on, H11 switch the other end be connected on one end of H12 plug-in strips, the other end of H12 plug-in strips with
The high standby one end connection become, the high standby other end become are connected with a cut-off point；One end of H14 earthing switch blades is connected to H2 switches
The other end on, the other ends of H14 earthing switch blades ground connection；One end of H16 earthing switch blades is connected on the other end of H5 switches,
The other end ground connection of H16 earthing switch blades.
3. the mating interim a whole set of activation system exported under engineering does not complete according to claim 1, which is characterized in that high
Pressure factory, which becomes, includes the change of A high pressures factory, A high-voltage switch gears, A stand-by power supplies service entrance switch, the change of B high pressures factory, B high-voltage switch gears, B stand-by power supplies
Service entrance switch and 35KV debugging become；One end that one end and B high pressures factory that A high pressures factory becomes become all is connected to the another of generator plug-in strip
On end, the other end that A high pressures factory becomes is connected on one end of A high-voltage switch gears, and the other end of A high-voltage switch gears is connected to A standby electricities
On one end of source service entrance switch, the other end that B high pressures factory becomes is connected on one end of B high-voltage switch gears, the other end of B high-voltage switch gears
It is connected on one end of B stand-by power supply service entrance switch, the other end of A stand-by power supply service entrance switch and B stand-by power supply service entrance switch
The other end be all connected to 35KV debugging become on.
4. the mating interim a whole set of activation system exported under engineering does not complete according to claim 1, which is characterized in that encourage
The power end of magnetic variation is connected on a 6KV power switch.
5. the mating interim a whole set of activation system exported under engineering does not complete according to claim 1, which is characterized in that encourage
The power end of magnetic variation is connected in the outlet of generator.
6. the mating interim a whole set of activation system exported under engineering does not complete according to claim 2, which is characterized in that face
When the whole series activation system specific experiment process it is as follows：
(1) AC impedance, power consumption and the insulation resistance of generator amature are measured under steam turbine different rotating speeds；
(2) under rated speed, experiment during generator unit stator winding three-phase short circuit is carried out；
(2.1) three-phase short-circuit characteristic of generator is measured；
One direction adjusts electric current, is the record power generation respectively of these points of 3.85A, 3A, 2A, 1A, 0.5A by generator secondary current
Machine three-phase current, exciting current, excitation voltage and α values measure generator three-phase short-circuit characteristic, first do dropping characteristic, after do
Rise characteristic；Measurement finishes, and generator unit stator electric current is maintained at rated value；
(2.2) checkout facility of generator protection current loop and measuring device；
(2.3) shaft voltage during stator rated current is measured；
(2.4) generator short circuit de-excitation time-constant is measured；
(3) generator band high factory is carried out to be lower zero rising test；
Dynamo current is risen into 600A from 0A points of multiple stages, transform er differential protection and differential protection for generator are carried out after stablizing
Verification；
(4) under rated speed, experiment when generator unit stator winding three-phase is opened a way；
(4.1) no-load characteristic of generator is measured；
By generator secondary voltage, for 120V, 115V, 110V, 105V, 100V, 90V, 60V, these points are remembered to measure during experiment
Record generator three-phase voltage, exciting current, excitation voltage and α values；
4.2) checkout facility of generator voltage secondary circuit；
After generator voltage rises to rated value, the amplitude and phase sequence and open-triangular winding of inspection generator generator terminal PT secondary voltages
On unbalance voltage value, measure the third-harmonic component of generator generator terminal side and neutral point side secondary voltage；
(4.3) shaft voltage under rated voltage is measured；
Stator voltage is kept to be measured to be specified with high internal resistance table during measurement；
(4.4) generator zero load de-excitation time-constant is measured；
(4.5) stator winding residual voltage and phase sequence after generator zero load demagnetization are measured；
Generator generator terminal PT secondary side residual voltages are measured, if its value is smaller, can be measured in primary side；
(5) up-flow is played by the H14 earthing switch blades of 500kV GIS, H15 earthing switch blades zero respectively, verification generator transformer is protected
Shield and the female spill current circuits of II；
Flow up path 1：Generator → generator contactor → main transformer → H13 plug-in strips → H3 plug-in strips → H2 switches → H14 earthing switch blades；
Flow up path 2：Generator → generator contactor → main transformer → H13 plug-in strips → H4 plug-in strips → H5 switches → H6 plug-in strips → H7 locks
Knife → H8 switches → H9 plug-in strips → mother II → H10 plug-in strips → H11 switches → H12 plug-in strips → H15 earthing switch blades；
(6) by high standby low pressure side short circuit zero up-flow when, verification high auxiliary differencial protection and measurement current loop；
Flow up path：Generator → generator contactor → main transformer H13 plug-in strips → H4 plug-in strips → H5 switches → H6 plug-in strips → H7 plug-in strips
Standby change → the short dot of → H8 switches → H9 plug-in strips → mother II → H10 plug-in strips → H11 switches → H12 plug-in strips → height；
(7) stepping up from zero is tested；
(7.1) generator band main transformer stepping up from zero；
Pressure build-up test approach is：Generator → generator contactor → main transformer (change of A, B high factory) → main transformer high-pressure side PT；
(7.2) generator band generalized information system stepping up from zero experiment；
Pressure build-up test approach is：Generator → generator contactor → main transformer (change of A, B high factory) → main transformer high-pressure side PT → 5012, H8
Switch → entire generalized information system；
(7.3) the high standby change stepping up from zero of generator band；
Pressure build-up test approach is：Generator → generator contactor → main transformer (change of A, B high factory) → main transformer high-pressure side PT → H5 is switched
→ H8 switches → mother II → H11 switches → height is standby to become the standby change of high pressure side pressure change → height；
(8) the excitation control system experiment under generator no-load condition.
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| CN110880792A (en) * | 2019-11-04 | 2020-03-13 | 中国能源建设集团华东电力试验研究院有限公司 | One-time voltage-on synchronous nuclear phase fast switching inspection system and inspection method for electrical system |
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| CN110854925B (en) * | 2019-11-04 | 2021-06-08 | 中国能源建设集团华东电力试验研究院有限公司 | One-time voltage-on synchronous nuclear phase inspection system and inspection method for electrical system |
| CN111624523A (en) * | 2020-06-02 | 2020-09-04 | 西安热工研究院有限公司 | System and method for verifying differential protection polarity of line of generator-transformer unit wiring mode system |
| CN114415020A (en) * | 2022-01-20 | 2022-04-29 | 广东韶钢松山股份有限公司 | Test method for dynamic debugging of generator |
| CN114415020B (en) * | 2022-01-20 | 2023-03-14 | 广东韶钢松山股份有限公司 | Test method for dynamic debugging of generator |
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