CN105932701A - Optimization configuration method for pumped storage multi-unit shared SFC starting station service power supply - Google Patents

Optimization configuration method for pumped storage multi-unit shared SFC starting station service power supply Download PDF

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CN105932701A
CN105932701A CN201610407402.2A CN201610407402A CN105932701A CN 105932701 A CN105932701 A CN 105932701A CN 201610407402 A CN201610407402 A CN 201610407402A CN 105932701 A CN105932701 A CN 105932701A
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unit
sfc
starting
power supply
starts
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CN105932701B (en
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李晓明
穆显勇
何乐
王坤杰
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HUBEI BAILIANHE PUMPED STORAGE Co Ltd
State Grid Corp of China SGCC
Wuhan University WHU
State Grid Xinyuan Co Ltd
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Wuhan University WHU
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28Arrangements for balancing of the load in a network by storage of energy
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381Dispersed generators

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)
  • Inverter Devices (AREA)

Abstract

The invention discloses an optimization configuration method for a pumped storage multi-unit shared SFC starting station service power supply. The optimization configuration method comprises the following steps of: determining the starting sequence of multiple pumped storage units by taking the minimum quality influence on system voltage as a principle; optimally configuring a starting power supply of a variable-frequency starting device SFC according to the unit starting sequence by taking the minimum quality influence on station service voltage as a principle; optimally configuring station service according to the starting power supply of the SFC; and starting pumped storage units according to the optimally configured SFC starting power supply and station service. The optimization configuration method disclosed by the invention is used for solving the possible problems that the voltage magnitude is decreased and the harmonic component is increased, even unqualified voltage quality or unsuccessful starting, in a process of starting the pumped storage units through the SFC; and technical support can be provided for planning design and safe and economical operation of a pumped storage power station.

Description

A kind of water-storage multicomputer is shared SFC and is started high voltage auxiliary power Optimal Configuration Method
Technical field
The present invention relates to hydroenergy storage station safe operation technical field, particularly to a kind of water-storage Multicomputer is shared SFC and is started high voltage auxiliary power Optimal Configuration Method.
Background technology
Hydroenergy storage station accesses network system as new forms of energy.Pump-storage generator draws water and generates electricity Two kinds of working methods.Stop because of certain customers' electricity consumption when night, and various large electric power plant, nuclear power can not Significantly shutting down or reduce generating, when electricity more than needed occurs in power system, hydroenergy storage station can utilize These electricity more than needed, starting unit is extracted into eminence the water of lower and is in store, and power system by the time is used During electricity peak, then the water of eminence is put down, drive turbine-generator units generating, electric power is sent back to electricity Net, supplies user power utilization, and the water after generating still returns to lower.The operation of hydroenergy storage station, improves The operational reliability of electrical network, motility, safety and economy.
Pump-storage generator, in motoring condition starts starting process, the most first uses shared frequency conversion to open Unit is dragged to rated speed from 0 rotating speed by dynamic device, is connected to the grid and draws water.But at unit If the configuration of SFC power supply and service power is improper in start-up course, it will directly affect electrical network and factory , there are some warning messages in the quality of voltage of electricity consumption, may affect unit normal starting, even result in Start unsuccessfully.The present invention starts the feature of pump-storage generator according to station service, formulates water-storage multimachine Group is shared SFC and is started the technical scheme that high voltage auxiliary power is distributed rationally, for solving China water-storage SFC Start high voltage auxiliary power optimization allocation and technical support and equipment guarantee are provided.
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.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention schematic flow sheet.
Fig. 2 is four unit Typical Disposition wiring diagrams of the embodiment of the present invention.
Fig. 3 is that the embodiment of the present invention starts unit 1 electricity optimization configuration schematic diagram.
Fig. 4 is that embodiment of the present invention unit 1 works, starts unit 2 electricity optimization configuration schematic diagram.
Fig. 5 is embodiment of the present invention unit 1 and unit 2 works, start the configuration signal of unit 3 electricity optimization Figure.
Fig. 6 is that embodiment of the present invention unit 1, unit 2 and unit 3 work, start unit 4 electricity optimization Configuration schematic diagram.
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.

Claims (4)

1. a SFC startup high voltage auxiliary power Optimal Configuration Method shared by water-storage multicomputer, and it is special Levy and be, 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.
A kind of water-storage multicomputer the most according to claim 1 is shared SFC and is started station service electricity Source optimization collocation method, it is characterised in that definition scheduling requirement starts m platform unit, then according to following Condition selects to perform:
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.
A kind of water-storage multicomputer the most according to claim 1 is shared SFC and is started station service electricity Source optimization collocation method, it is characterised in that in described step 3, filters at SFC input parallel connection LC Ripple device, makes electrical network and Auxiliary Power System Voltage harmonic wave not exceed standard.
A kind of water-storage multicomputer the most according to claim 1 is shared SFC and is started station service electricity Source optimization collocation method, it is characterised in that in described step 4, starts according to the SFC distributed rationally Power supply and station service start shown in the startup logical relation such as formula (1) of pump-storage generator:
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.
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