Summary of the invention
The present invention provides a kind of water-storage multicomputer to share the SFC startup high voltage auxiliary power side of distributing rationally
Method, it is intended to solve in hydroenergy storage station, due to SFC start during unit high voltage auxiliary power and
SFC power configuration not only, directly affects the quality of voltage of electrical network and station service, affects unit and normally rises
Dynamic, even result in and start failed technical barrier.
The object of the present invention is achieved like this:
A kind of water-storage multicomputer is shared SFC and is started high voltage auxiliary power Optimal Configuration Method, and its feature exists
In, comprise the following steps:
Step 1, with on system voltage quality affect minimum principle, determine that water-storage multicomputer starts
Sequentially, specifically: the hydroenergy storage station that SFC starts is shared for n platform unit, by trend meter
Calculate and the Digital Simulation of unit starting process, unit is individually used variable frequency starting from 1 to n platform unit
Device SFC starts in different high voltage auxiliary power access waies, it is thus achieved that at same type of station service electricity
The independent starter motor group sequence to system voltage influence degree under the access way of source.
Step 2, with on service power voltage quality affect minimum principle, join by unit starting sequential optimization
Putting the startup power supply of static frequency converter SFC, concrete grammar is: shares SFC for n platform unit and opens
Dynamic hydroenergy storage station, a unit and a main transformer constitute a unit connection, by trend meter
Calculate and the Digital Simulation of unit starting process, use static frequency converter SFC different each unit
When high voltage auxiliary power access way starts, it is thus achieved that different high voltage auxiliary power connect and station-service power plant height is become power supply
The sequence from big to small of voltage influence degree.By unit starting order, select and station-service power plant height is become confession
The high voltage auxiliary power access way that piezoelectric voltage impact is minimum, accesses static frequency converter SFC, as electricity
Source starts corresponding pump-storage generator.
Step 3, configuring station service according to the startup electricity optimization of SFC, the startup power supply at SFC connects
After entering, select the unit starting factory to its quality of voltage, i.e. variation and voltage waveform impact minimum
Power supply optimization configuration station service is become with power plant's height.When the SFC using ac-dc-ac inverter mode starts unit
Time, reactor isolation harmonic wave should be installed between SFC input and station service side additional, prevent SFC frequency conversion
Drag in unit start-up course and produce big harmonic wave,
The SFC that step 4, basis are distributed rationally starts power supply and station service starts pump-storage generator,
Optimize starting process and meet constraints:
Constraints one: avoid service power and SFC power supply to take from same power supply;
Constraints two: definition main transformer numbered i, i=1,2,3..., n;Unit numbered j, j=1,2,3..., n;
The power supply of SFC is taken from main transformer i, unit j to be started and is not belonging to same unit-main transformer
Unit, that is: i ≠ j.
Constraints three: connect the last starting of unit needs that the main transformer of SFC equipment is corresponding.
Share SFC at above-mentioned a kind of water-storage multicomputer and start the high voltage auxiliary power side of distributing rationally
Method, definition scheduling requirement starts m platform unit, then selects to perform according to following condition:
Condition one: do not considering that power unit in economic operation, maintenance require or in the case of traffic order, press
Unit starting starts m platform unit successively to the influence degree of system voltage quality order from big to small;
Condition two: in the case of there is power unit in economic operation requirement or traffic order, by unit starting
The influence degree of system voltage is put in order successively from big to small, preferentially starts traffic order, economy
The unit of service requirement, restarts other unit less than m platform;
Condition three: in the case of there is unit maintenance requirement, maintenance unit is extracted out from sequence, opens
The influence degree of system voltage quality order from big to small is opened successively by dynamic m platform unit by unit starting
Other m platform unit dynamic.
Share SFC at above-mentioned a kind of water-storage multicomputer and start the high voltage auxiliary power side of distributing rationally
Method, in described step 3, at SFC input parallel LC filter, makes electrical network and station service electrical system
Voltage harmonic does not exceeds standard.
Share SFC at above-mentioned a kind of water-storage multicomputer and start the high voltage auxiliary power side of distributing rationally
Method, in described step 4, starts power supply according to the SFC distributed rationally and station service starts water-storage
Shown in the startup logical relation such as formula (1) of unit.
Wherein: QD represents unit starting success;SFC represents that static frequency converter SFC is working properly;
ZB represents that main transformer is working properly;CB represents that factory's height becomes working properly;JZ represents that unit is working properly;i
Number for main transformer, i=1,2,3..., n;J is machine group #, j=1,2,3..., n;SFCijFor static frequency converter
The power supply of SFC takes from main transformer i, drags unit j and starts;K is that factory's height becomes numbering, k=1,2,3..., l;m
The number of units of unit is started for plan.Formula (1) step 1,2,3 simultaneously meet under conditions of set up.
Therefore, the present invention is during solving to start pump-storage generator by SFC, in fact it could happen that
Voltage magnitude decline and harmonic component strengthen, even occur that quality of voltage is defective or starts unsuccessful
Problem, can be the planning and designing of hydroenergy storage station and safety and economic operation provides technical support.
Detailed description of the invention
Describe in detail with embodiment below in conjunction with the accompanying drawings:
A kind of water-storage multicomputer is shared SFC and is started high voltage auxiliary power Optimal Configuration Method.
Water-storage multicomputer is shared SFC and is started high voltage auxiliary power Optimal Configuration Method embodiment flow chart
As it is shown in figure 1, as seen from Figure 1:
1, described step is 1. to affect minimum principle to system voltage quality, determines water-storage multimachine
Group boot sequence 1:
The hydroenergy storage station that SFC starts is shared for n platform unit, is opened by Load flow calculation and unit
The Digital Simulation of dynamic process, individually uses static frequency converter SFC to exist from 1 to n platform unit unit
Different high voltage auxiliary power access waies starts, it is thus achieved that in same type of high voltage auxiliary power access way
The sequence to system voltage influence degree of the most independent starter motor group.
If scheduling requirement starts m platform unit, then three kinds of situations are divided to start: 1) do not considering unit warp
Ji operation, maintenance require or in the case of traffic order, by the unit starting shadow to system voltage quality
Ring degree order from big to small and start m platform unit successively;2) exist power unit in economic operation requirement or
In the case of traffic order, by unit starting, the influence degree of system voltage is put in order from big to small
Successively, preferentially start traffic order, the unit of economical operation requirement, restart less than other of m platform
Unit;3) in the case of there is unit maintenance requirement, maintenance unit is extracted out from sequence, starts m
Platform unit starts it by unit starting successively to the influence degree of system voltage quality order from big to small
Its m platform unit.
The most impacts on system voltage quality of unit quantity started are the biggest, first start the machine that impact is big
Group, rear startup affects little unit, it is ensured that to system electricity during all plan starts unit starting
Pressure quality impact minimum.
2, described step is 2. to affect minimum principle to service power voltage quality, by unit starting order
Distribute the startup power supply 2 of static frequency converter SFC rationally:
The hydroenergy storage station that SFC starts, a unit and a main transformer structure are shared for n platform unit
Become a unit connection, by Load flow calculation and the Digital Simulation of unit starting process, each unit is adopted
With static frequency converter SFC when different high voltage auxiliary power access waies starts, it is thus achieved that different station-services
Electricity power supply connects and station-service power plant height is become the sequence from big to small of supply voltage influence degree.By unit starting
Sequentially, select and station-service power plant height is become the high voltage auxiliary power access way that supply voltage impact is minimum, connect
Enter static frequency converter SFC, as the corresponding pump-storage generator of power initiation.
3, described step is 3. according to the startup electricity optimization configuration station service 3 of SFC:
After the startup plant-grid connection of SFC, select unit starting to its quality of voltage, i.e. variation and
The station-service power plant height change power supply optimization configuration station service that voltage waveform impact is minimum.In order to ensure station service
Quality of voltage, when the SFC using ac-dc-ac inverter mode starts unit, should at SFC input and
Install reactor isolation harmonic wave between station service side additional, produce during preventing SFC Frequency converting driving unit starting
Raw bigger harmonic wave, the most also will be at SFC input parallel LC filter, it is ensured that electrical network and factory
Electricity system voltage harmonic does not exceeds standard.
4,4. described step starts power supply according to the SFC distributed rationally and station service starts water-storage
Unit 4:
The satisfied following requirement of optimization starting process:
1) service power (factory's height becomes) and SFC power supply is avoided to take from same power supply (main transformer);
2) if main transformer numbered i, i=1,2,3..., n;Unit numbered j, j=1,2,3..., n;The electricity of SFC
Source is taken from main transformer i, unit j to be started and is not belonging to same unit-main transformer unit, it may be assumed that
i≠j。
3) unit that the main transformer of guarantee connection SFC equipment is corresponding as far as possible finally starts.
Power supply and the startup logic of station service startup pump-storage generator is started according to the SFC distributed rationally
Shown in relation such as formula (1).
Wherein: QD represents unit starting success;SFC represents that static frequency converter SFC is working properly;
ZB represents that main transformer is working properly;CB represents that factory's height becomes working properly;JZ represents that unit is working properly;i
Number for main transformer, i=1,2,3..., n;J is machine group #, j=1,2,3..., n;SFCijFor static frequency converter
The power supply of SFC takes from main transformer i, drags unit j and starts;K is that factory's height becomes numbering, k=1,2,3..., l;m
The number of units of unit is started for plan.
Formula (1) is set up under conditions of step one, step 2 and step 3 meet simultaneously.
Example 1
The following is employing said method is embodied as case.
As in figure 2 it is shown, four unit Typical Disposition wiring diagrams of the embodiment of the present invention, this water-storage electricity
Stand one static frequency converter SFC of configuration, and four unit-main transformer unit, two factory's height become, and SFC leads to
Cross reactor and access unit, and configure parallel LC filter.The startup electricity optimization carrying out SFC is joined
Put schematic diagram.
In Fig. 2, unit and main transformer number of units n=4, start unit number m=4, factory's height becomes number of units l=2, root
Start power supply according to the SFC distributed rationally and station service starts the startup logical relation of pump-storage generator such as
Shown in formula (2).
The optimum organization scheme of formula (2) be ensured electrical network and service power voltage quality premised on, because of
This, it is understood that there may be multiple optimum organization schemes, choosing according to physical device of concrete optimum organization scheme
Operation conditions and convenient degree of operation choose the most rational scheme.
Now a kind of allocation plan of explanation as a example by Fig. 2.In Fig. 2, SFC can freely be switched to main transformer 1,
2,3,4, but in view of the reliability of SFC equipment, in order to reduce the number of times of switching of SFC, institute as far as possible
No. 2 main transformers or No. 3 main transformers are taken from the power supply of restriction SFC.Factory's height becomes the power supply of 1 and takes from main transformer 1
Or main transformer 3, factory's height becomes the power supply of 2 and takes from main transformer 2 or main transformer 4.Assume that set optimization starting sequence is
#1 unit, #2 unit, #3 unit, #4 unit, startup of unit SFC and the electricity optimization of station service
Allocation plan is as follows:
Shown in Fig. 3, the power supply starting #1 unit: SFC takes from main transformer 2, and factory's height becomes 1 (station service I
Section bus) power supply take from main transformer 3, factory's height becomes the power supply of 2 (II section of bus of station service) and takes from main transformer
4;
Shown in Fig. 4, starting #2 unit, #1 set grid-connection draws water, and the power supply of SFC takes from main transformer 3,
Factory's height becomes the power supply of 1 (I section of bus of station service) and takes from main transformer 1, and factory's height becomes 4 (II section of mother of station service
Line) power supply take from main transformer 4;
Shown in Fig. 5, starting #3 unit, #1 unit, #2 set grid-connection draw water, and the power supply of SFC is taken from
Main transformer 2, factory's height becomes the power supply of 1 (I section of bus of station service) and takes from main transformer 1, and factory's height becomes 2 (station-services
Electricity II section of bus) power supply take from main transformer 4;
Shown in Fig. 6, starting #4 unit, #1 unit, #2 unit and #3 set grid-connection draw water, SFC's
Power supply takes from main transformer 3, and factory's height becomes the power supply of 1 (I section of bus of station service) and takes from main transformer 1, and factory's height becomes
The power supply of 2 (II section of bus of station service) takes from main transformer 2;
The above, be only presently preferred embodiments of the present invention, and the present invention not makees any form
On restriction.Although the present invention is disclosed above with preferred embodiment, but it is not limited to this
Bright.Any those of ordinary skill in the art, without departing under technical solution of the present invention ambit,
Technical solution of the present invention is made many possible changes by the method and the technology contents that all may utilize the disclosure above
Move and modify, or be revised as the Equivalent embodiments of equivalent variations.Therefore, every without departing from skill of the present invention
The content of art scheme, according to the present invention technical spirit to any simple modification made for any of the above embodiments,
Equivalent variations and modification, all still fall within the range of technical solution of the present invention protection described herein
Specific embodiment is only to present invention spirit explanation for example.The technology of the technical field of the invention
Described specific embodiment can be made various amendment or supplements or use similar side by personnel
Formula substitutes, but without departing from the spirit of the present invention or surmount model defined in appended claims
Enclose.