CN106451565B - A kind of power plant's optimization submitting on-line analysis based on perturbation theory - Google Patents
A kind of power plant's optimization submitting on-line analysis based on perturbation theory Download PDFInfo
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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
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
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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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
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Abstract
The safety on line analysis calculation method that power plant's optimization based on perturbation theory that invention describes a kind of is sent out, comprising the following steps: (1), be equipped with online safety analysis united computing system and national unified online power flow data；(2), the when interruption for choosing concern carries out calculating and the record of initial trend；(3), the 220kV unit for sending out section to power plant carries out perturbation analysis, the power output of the single adjustment each Power Plant in the section, the undulating value of record circuit transmission power；(4), according to the Perturbation of the power variation of concern route and unit, the route is acquired to the susceptibility of this unit；(5), arrangement is ranked up to concern route/unit susceptibility, obtaining influences the sequence of related unit susceptibility and influence degree that route and key sections are sent out in concern.
Description
Technical field
The invention belongs to electric power system dispatchings to run field, and in particular to a kind of power plant's optimization submitting based on perturbation theory
On-line analysis.
Background technique
As booming and extra-high voltage technology the construction of clean energy resource promotes, the electrical link day between bulk power grid
It is becoming tight close, the coupled relation of key sections tends to complicate, and safety and stability is horizontal mutually to be restricted, the optimization benefit of power system resource
With and contradiction highlights the problem of safety and stability.Power System Analysis profession is in the stability analysis meter for carrying out power plant's access system at present
It is some typical modes of selection, such as the big hair of summer big mode, winter small mode, water power, low water mode, normal side when calculation
Formula and maintenance mode, which are carried out, calculates analysis.Traditional off-line analysis result is all based on extreme typical way, in stability analysis
There are more safety margin, off-line calculation condition and actual electric network are there are larger, therefore calculated result is too conservative, is unfavorable for electric power
Optimization send out and resource overall configuration.Analysis method is sent out in traditional optimization not only allows method of operation computing staff in face of numerous
The calculation amount of weight, conservative result reduce the on-road efficiency of power grid, are unfavorable for improving the ability to transmit electricity of power grid.
The quick variation of power grid and the extensive of new energy, which are accessed, to be advanced stability analysis and calculates to more short cycle, more smart
Thin direction is expanded.Safety on line is analyzed achievable more short-period mode and is calculated, and realizes the organic linking with management and running control,
It realizes and targetedly proposes Optimal improvements or precautionary measures, provide quickly and effectively reliable analysis hand for dispatching of power netwoks operation
Section completes the intelligent traffic control transformation from empirical management and running to safety analysis decision.Therefore, with modern electric system
The expansion of system scale needs to reinforce the exploration and research in terms of scale grid line is analyzed with control means, this is to the daily of power grid
Operation and control are of great significance.
Summary of the invention
The on-line analysis that power plant's optimization based on perturbation theory that the object of the present invention is to provide a kind of is sent out, is adopted
With the current online power flow data of power grid, the power output perturbation centering electrocardio factory for calculating center power plant other units of periphery sends out section
Susceptibility, to obtain the power output Configuration Adjustment Plan of the section unit.By being based on, perturbation theory perturbation analysis is last to be obtained
To based on the current electric grid method of operation power plant optimize submitting scheme, for power grid management and running and plan arrange provide refer to according to
According to.
This method is not only suitable for the on-line security and stability analysis system of province tune D5000, and it is digital in real time to be also suitable for ADPSS
Analogue system.The two the difference lies in that this method apply to on-line security and stability analysis system be based on current electric grid
Analysis is sent out in the optimization that line flow data carries out perturbation theory；It and is then to take respectively with ADPSS all-digital real-time simulation system
Analysis is sent out in the optimization that the extreme flow data of kind typical way carries out perturbation theory.
In order to achieve the above objectives, the on-line analysis side that power plant's optimization based on perturbation theory that the present invention provides a kind of is sent out
Method, comprising the following steps:
The real-time data of power grid of discontinuity surface when step 1, selection concern；
Step 2 carries out initial Load flow calculation work according to the real-time data of power grid in step 1, and obtains initial trend knot
Fruit, that is, operation of power networks state, the periphery power plant of section where the active power output of records center power plant and center power plant it is active go out
Power, record currently send out trend value and the direction of relevant heavily loaded section to center power plant；
Step 3, according to the switch on condition in the initial power flow solutions of step 2, each power plant of section where centering electrocardio factory
The unit of different voltages level carries out perturbation analysis one by one, and records the tide that corresponding center power plant sends out route and heavily loaded section
Stream calculation result；
Step 4 according to unit Perturbation each in step 3 and sends out the change of power flow of line related, and calculating acquires
Electrocardio factory sends out route and heavily loaded section to the susceptibility numerical value of each unit；
The susceptibility numerical value of step 5, each route according to obtained in step 4 is ranked up arrangement to unit, is influenced
Center power plant sends out the unit susceptibility numerical ordering and influence degree of route and heavily loaded section, by the initial trend of step 2
The power output of unit obtain each unit adjustable space and unit adjustment constraint and step 4 obtained in each route correlation
Unit sensitivity value determines Adjusted Option according to adjustable element and the smallest standard of adjustment amount.
The safety on line analysis calculation method that a kind of power plant's optimization based on perturbation theory is sent out, the step
In 3, the perturbation analysis process are as follows: the power output size for artificially adjusting periphery unit in simulations, so that center power plant send
The trend of route and heavily loaded section generates fluctuation out, i.e. the active power output of the single adjustment each Power Plant in the section one by one,
Load flow calculation is carried out before and after adjustment unit output, the tide of route and heavily loaded section is sent out on the periphery of record adjustment front and back
Flow valuve.
The safety on line analysis calculation method that a kind of power plant's optimization based on perturbation theory is sent out, the step
In 5, the process of Adjusted Option is determined are as follows:
Using adjustment amount minimum as optimization aim, constraint condition has the stability limitation, negative of the bound of generating set, route
The resection of lotus, the load restraint in all kinds of forecast accidents and operation constraint, according to adjustable element and its to the influence of route
The candidate spatial that degree is adjusted；Then different adjustment degree of priority is given to power generation and load；Further according to candidate spatial
The susceptibility of interior level of sensitivity and the controllable variable including generator output, cutting load amount sorts, and determination can
Control the adjustment amplitude and size of variable.
The safety on line analysis calculation method that a kind of power plant's optimization based on perturbation theory is sent out, further includes step
6: Security Checking being carried out to the Adjusted Option that step 5 obtains, is built if submitting associated sections are no longer out-of-limit or heavily loaded as adjustment
View output；Otherwise, expand adjustable element range in step 3, i.e. expansion candidate spatial, solve scheme again, pacify until meeting
Whole school's core.
The safety on line analysis calculation method that a kind of power plant's optimization based on perturbation theory is sent out, the candidate
Space is adjustable element and its current adjustable amount, and wherein element includes unit and load.
The present invention is based on the advantages of on-line analysis of perturbation theory research optimization submitting to be: what selection was analyzed in calculating is
Actual operating based on current electric grid obtains running based on current electric grid by the unit perturbation analysis based on perturbation theory
The center power plant of mode optimizes submitting scheme, can targetedly instruct the method for operation of current electric grid, mitigates the tired of nest electricity
Border.It needs to carry out the case where 168 hours units completely send out trial operation debugging especially for certain power plant newly to put into operation, takes this online
The scheme that analysis method can be adjusted in a manner of quickly providing and sending out for power plant, meets the full hair requirement of power plant's specific period.
Detailed description of the invention
Fig. 1 is flow diagram of the invention；
Fig. 2 is CD power plant periphery power grid geographical wiring diagram in 2016.
Specific embodiment
By taking the optimization of Hunan CD power plant 220kV level is sent out and calculated as an example, illustrate that power plant's optimization based on perturbation theory is sent
Application of the on-line security and stability analysis method out in the actual operating adjustment of electric system.The western Hunan is accessed with CD power plant
Based on rack after nortel net, maximum is sent out with CD power plant and turns to the on-line analysis calculating that target optimizes submitting.With CD
Power plant is center body, considers to carry out the power output of other power plant of periphery single argument one by one and adjusts, counts under the different methods of operation
The positive anticorrelation power plant of line related/section and its susceptibility that CD power plant sends out are calculated, is provided for dispatching of power netwoks plan and operation
Reference frame.
CD power plant includes 2 660MW units, grid-connected by 500kV and 220kV respectively.500kV level, CD power plant π access
Former A-B route；220kV level creates the CD-DS double-circuit line and CD-TZM route of 220kV.CD power plant periphery power grid is geographical
Wiring diagram is as shown in Fig. 2, CD power plant line related design parameter is as shown in table 1 below.
Table 1CD power plant sends out line parameter circuit value information
It only two stops transport in CD-DS I line, CD-DS II line, CD-TZM line three under steady control normal mode at present, and CD
Power plant's #1 machine power output is more than to take and cut machine measure under conditions of certain control power；Normal CD-DS I line, CD-DS II line, CD-TZM
Line single time stoppage in transit does not surely provide corresponding arrangement in control.This will not be repeated here for steady control arrangement under maintenance mode and particular form
Analysis.
It analyzes to obtain by the N-1 for sending out route to CD power plant 220kV level: in the case where surely controlling the normal mode to put into operation, CD-
DS I line line and CD-DS II line single-hop, not will cause overload；It puts into operation under normal mode in steady control, caused by CD-TZM line single-hop
The case where ST line, FD line isocorrelate pass by load needs the power output of reasonable arrangement periphery 220kV unit.
If sending out maximum with G1 turns to target, it is contemplated that line related overload situations caused by CD-TZM line single-hop need to control
II line of FD, ST line and CT line trend processed, the i.e. grid-connected unit of the 220kV such as reasonable arrangement SM, YY, CD, SZ, LJT, FT, ZS, JY go out
Power.220 kilovolts of grid-connected units of CD power plant put into operation, on the one hand can be effectively reduced GS revive main transformer it is off line, on the other hand, can aggravate
The trend of II line of FD, ST line.
So-called perturbation theory (perturbation), when original meaning is that a celestial body is moved around another celestial body by rule, because by other
The influence of celestial body generates deviation in orbit.It is very little that this effect is compared than the gravitation of centerbody.In in this embodiment
The primary association power plant for considering certain route/sections is CD power plant, therefore the power output of other periphery Power Plants is carried out one by one
Single argument adjustment calculates concern route to the susceptibility of periphery power plant.Route is carried out with the unified online power flow data in the whole nation
Analysis is calculated to the susceptibility of unit.
According to management and running experience, the power output of FT power plant is affected to the submitting of CD power plant, with the reality of the big hair of FT power plant
Border section is point of penetration, analyzes susceptibility of the power output perturbation to concern route of different units.
1) some section of the big hair of FT power plant after CD power plant 220kV puts into operation, the December 10 in 2015 issued such as state's tune are chosen
Day 20:30 online data (the big hair of FT power plant)；
2) first initial trend is calculated, records the initial power output of CD power plant and periphery power plant；
3) perturbation analysis, the power output of the single perturbation each Power Plant in the section, note are carried out to the 220kV unit of the section
Record the undulating value of route transmission power；
4) according to the Perturbation of the power variation of concern route and unit, the route is acquired to the susceptibility of this unit；
5) arrangement is ranked up to concern route/unit susceptibility in this fashion, show that route is sent out in influence concern
And the sequence of related unit susceptibility and influence degree of key sections；
6) to control the minimum principle of adjustment amount, according to each unit in the susceptibility and step 2) solved in step 5)
Adjustable amount solving optimization scheme.
Table 2 is after CD power plant 220kV level puts into operation be power grid initial mode, wherein FT it is big hair, CD power plant 500kV power output
It is 0 for 0, YY power plant 220kV power output.Table 3 is the sensitivity based on 220kV route/section under 1 initial mode of table to periphery unit
Spend list.
Power grid initial mode is given greatly by table 1FT power plant
Table 2FT gives greatly susceptibility list of the route/section to unit
1) in the case where the big hair of FT, from table 2 and table 3:
The positive incidence power plant of FD II line is followed successively by CD power plant (220kV), SZ power plant, FT power plant, LJT power plant, WMP electricity
Factory, YY second phase, reverse correlation is followed successively by JY power plant, DTSM power plant, ZS power plant, HDSM power plant, WQX power plant etc..
The positive incidence power plant of ST line be followed successively by CD power plant (220kV), SZ power plant, FT power plant, LJT power plant, JY power plant,
DTSM power plant, ZS power plant, WMP power plant, HDSM power plant, WQX power plant, reverse correlation are followed successively by the YY second phase.
The positive incidence power plant of STFD II line+TZ section is followed successively by SZ power plant, CD power plant (220kV), LJT power plant, FT electricity
Factory, WMP power plant, YY second phase, reverse correlation power plant is followed successively by JY power plant, DTSM power plant, ZS power plant, HDSM power plant, WQX power plant.
The positive incidence power plant of 0.4CT+FD section be followed successively by CD power plant (220kV), SZ power plant, LJT power plant, FT power plant,
WMP power plant, YY second phase, reverse correlation power plant is followed successively by JY power plant, DTSM power plant, ZS power plant, HDSM power plant, WQX power plant.
The positive incidence power plant of CT+ST+FT section be followed successively by CD power plant (220kV), SZ power plant, JY power plant, DTSM power plant,
ZS power plant, LJT power plant, HDSM power plant, FT power plant, WQX power plant, WMP power plant, reverse correlation power plant are the YY second phase.
3) process of the small hair of FT is consistent with big hair, only changes the time of online section, this will not be repeated here.By FT it is small hair with
The sensitivity of the big hair initial mode of FT is to obtaining:
It is compared in FT big hair hair small with FT, the sensitive power plant sequence of institute's column line is identical；During the big hair of FT with
It is compared in the case of small hair, power plant's sensitivity difference of institute's column line is no more than 1.52%.It is right in FT big hair hair small with FT
Than power plant's sensitivity difference of listed section is no more than 2.25%.
Can be initially believed that no matter the big originating party formula of FT or small originating party formula, to FD2 line, ST line, CT line unit susceptibility shadow
Sound is very little.This CD power plant is optimized simultaneously to send out to calculate and is compared with the sensitivity analysis calculated result of PAS in D5000,
Sensitivity sequence is almost the same, and sensitivity number only has nuance.
Target is turned to sending out maximum with CD power plant (220kV level), while must consider to reduce by II line of FD, ST line and CT line
When trend route case of heavy load, route/unit susceptibility in table 2 can refer to, according to the adjustable amount and tune of periphery unit
The whole the smallest principle of amount determines the Adjusted Option of periphery unit output.According to the start-up mode of actual electric network, section will be sent out
It is positively correlated the periphery unit output that strong periphery unit output suitably reduces, inverse correlation is strong suitably to increase, mitigates and send out section weight
Situation is carried, to improve the ability to send outside of CD power plant.
Claims (3)
1. a kind of safety on line analysis calculation method that power plant's optimization based on perturbation theory is sent out, which is characterized in that including under
State step:
The real-time data of power grid of discontinuity surface when step 1, selection concern；
Step 2 carries out initial Load flow calculation work according to the real-time data of power grid in step 1, and obtains initial power flow solutions i.e.
The active power output of the periphery power plant of section where operation of power networks state, the active power output of records center power plant and center power plant, note
Trend value and the direction of relevant heavily loaded section are currently sent out in record to center power plant；
Step 3, according to the switch on condition in the initial power flow solutions of step 2, each power plant of section is different where centering electrocardio factory
The unit of voltage level carries out perturbation analysis one by one, and records the trend meter that corresponding center power plant sends out route and heavily loaded section
Calculate result；
Step 4, according to unit Perturbation each in step 3 and send out line related change of power flow, calculating acquire middle electrocardio
Factory sends out route and heavily loaded section to the susceptibility numerical value of each unit；
The susceptibility numerical value of step 5, each route according to obtained in step 4 is ranked up arrangement to unit, obtains influence center
Power plant sends out the unit susceptibility numerical ordering and influence degree of route and heavily loaded section, by the initial power flow solutions of step 2
The power output of unit obtain each unit adjustable space and unit adjustment constraint and step 4 obtained in each route correlation
Unit susceptibility numerical value determines Adjusted Option according to adjustable element and the smallest standard of adjustment amount；
In the step 3, the perturbation analysis process are as follows: the power output size for artificially adjusting periphery unit in simulations makes
Center power plant send out route and the trend of heavily loaded section generates fluctuation, i.e. each Power Plant in single adjustment section one by one
Active power output, carry out Load flow calculation before and after adjusting unit output, route is sent out on the periphery of record adjustment front and back
And the trend value of heavily loaded section；
In the step 5, the process of Adjusted Option is determined are as follows:
Using adjustment amount minimum as optimization aim, constraint condition has the bound of generating set, the stability limitation of route, load
Resection, the load restraint in all kinds of forecast accidents and operation constraint, according to adjustable element and its to the influence degree of route
The candidate spatial being adjusted；Then different adjustment degree of priority is given to power generation and load；Further according in candidate spatial
The sequence of the susceptibility of level of sensitivity and the controllable variable including generator output, cutting load amount determines controllable
The adjustment amplitude and size of variable.
2. the safety on line analytical calculation side that a kind of power plant's optimization based on perturbation theory according to claim 1 is sent out
Method, which is characterized in that further include step 6: Security Checking is carried out to the Adjusted Option that step 5 obtains, if sending out associated sections not
It is out-of-limit or heavily loaded then as adjustment suggestion output again；Otherwise, expand adjustable element range in steps of 5, that is, expand candidate empty
Between, scheme is solved again, until meeting Security Checking.
3. the safety on line analytical calculation that a kind of power plant's optimization based on perturbation theory according to claim 1 or 2 is sent out
Method, which is characterized in that the candidate spatial is adjustable element and its current adjustable amount, and wherein element includes machine
Group and load.
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