CN106451565A - Perturbation theory-based online analysis method of power plant optimization transmission - Google Patents
Perturbation theory-based online analysis method of power plant optimization transmission Download PDFInfo
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- CN106451565A CN106451565A CN201610670090.4A CN201610670090A CN106451565A CN 106451565 A CN106451565 A CN 106451565A CN 201610670090 A CN201610670090 A CN 201610670090A CN 106451565 A CN106451565 A CN 106451565A
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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 invention provides a perturbation theory-based online analysis method of power plant optimization transmission. The method comprises the following steps of (1) arranging an online security analysis and joint calculation system and nationally unified online power flow data; (2) selecting a concerned time quantum for carrying out calculation and recording of initial power flow; (3) carrying out perturbation analysis on 220kV units in a power plant transmission area, individually adjusting output of the units of a power plant in the area and recording a fluctuation value of transmission power of a line; (4) determining the sensitivities of the line to the units according to the power variation of the concerned line and the perturbations of the units; and (5) sorting and arranging the sensitivities of the concerned line/units and obtaining the sensitivity sort and the influence degrees of relevant units of affecting the concerned transmission line and a critical section.
Description
Technical field
The invention belongs to electric power system dispatching and run field, be specifically related to a kind of power plant's optimization based on perturbation theory and send
On-line analysis.
Background technology
As the construction of the flourish of clean energy resource and extra-high voltage technology advances, the electrical link day between bulk power grid
Being becoming tight close, the coupled relation of key sections tends to complicating, and safety and stability level mutually restricts, the optimization profit of power system resource
Highlight by the problem contradiction with safety and stability.Current Power System Analysis specialty is carrying out the stability analysis meter of power plant's access system
During calculation, be to select some typical modes, such as summer big mode, little mode in winter, water power send out greatly, low water mode, normally side
Formula and maintenance mode carry out computational analysis.Traditional off-line analysis result is all based on extreme typical way, in stability analysis
Leaving more margin of safety, off-line calculation condition and actual electric network exist relatively big, and therefore result of calculation is too conservative, is unfavorable for electric power
Optimization send the overall configuration with resource.Analysis method is sent in traditional optimization not only to be allowed faced by method of operation computing staff numerous
The amount of calculation of weight, conservative result also makes the on-road efficiency of electrical network reduce, and is unfavorable for improving the ability to transmit electricity of electrical network.
The Rapid Variable Design of electrical network and new forms of energy extensive is accessed and advances stability analysis and calculate to shorter cycle, more smart
Thin direction is expanded.Safety on line analysis can realize that more short-period mode calculates, it is achieved the organic linking with management and running control,
Realize proposing targetedly Optimal improvements or precautionary measures, provide quick effectively reliable analysis hand for dispatching of power netwoks operation
Section, completes to be changed to the intelligent traffic control of safety analysis decision-making by empirical management and running.Therefore, with modern electric system
The expansion of system scale, needs the exploration in terms of strengthening scale grid line analysis and control device and research badly, this daily to electrical network
Run and control significant.
Content of the invention
It is an object of the invention to, provide a kind of power plant based on perturbation theory to optimize the on-line analysis sent, adopt
By the current online power flow data of electrical network, the perturbation centering electrocardio factory of exerting oneself calculating center power plant other units of periphery sends section
Susceptibility, thus obtain the Configuration Adjustment Plan of exerting oneself of this section unit.By obtaining based on perturbation theory perturbation analysis is last
Sending scheme to the power plant's optimization based on the current electric grid method of operation, management and running and plan for electrical network arrange to provide reference to depend on
According to.
The method is not only suitable for the on-line security and stability analysis system that province adjusts D5000, is also applicable to ADPSS digital in real time
Analogue system.The difference of the two is, the method apply to on-line security and stability analysis system be based on current electric grid
Analysis is sent in the optimization that line flow data carries out perturbation theory；ADPSS all-digital real-time simulation system is used to be then to take respectively
Analysis is sent in the optimization that the extreme flow data of kind typical way carries out perturbation theory.
For reaching above-mentioned purpose, the invention provides a kind of power plant based on perturbation theory and optimize the on-line analysis side sending
Method, comprises the following steps：
The real-time data of power grid of discontinuity surface when step 1, selection concern；
Step 2, carry out initial Load flow calculation work according to the real-time data of power grid in step 1, and obtain initial trend knot
The i.e. operation of power networks state of fruit, records center power plant meritorious exert oneself and center power plant place section periphery power plant meritorious go out
Power, current trend value and the direction sending related heavily loaded section to center power plant of record；
Step 3, according to the switch on condition in the initial power flow solutions of step 2, each power plant of centering electrocardio factory place section
The unit of different voltage aspects carries out perturbation analysis one by one, and records corresponding center power plant and send circuit and the tide of heavy duty section
Stream calculation result；
Step 4, according to each unit Perturbation and the change of power flow sending line related in step 3, calculate in trying to achieve
Electrocardio factory sends circuit and the heavy duty susceptibility numerical value to each unit for the section；
Step 5, the susceptibility numerical value according to each circuit obtaining in step 4, be ranked up to unit arranging, affected
Center power plant sends circuit and the heavy duty unit susceptibility numerical ordering of section and influence degree, by the initial trend of step 2
The exerting oneself of unit obtains the adjustable space of each unit and unit adjusts constraint, and each circuit obtaining in step 4 is related
Unit sensitivity value, determines Adjusted Option according to the standard that adjustable element and adjustment amount are minimum.
Described a kind of power plant based on perturbation theory optimizes the safety on line analysis calculation method sent, described step
In 3, described perturbation analysis process is：Artificially adjust the size of exerting oneself of periphery unit in simulations so that center power plant send
Going out circuit and the trend of heavy duty section producing fluctuation, single adjustment the meritorious of this each Power Plant of section is exerted oneself i.e. one by one,
All carrying out Load flow calculation before and after adjusting unit output, the periphery before and after record adjusts sends circuit and the tide of heavy duty section
Flow valuve.
Described a kind of power plant based on perturbation theory optimizes the safety on line analysis calculation method sent, described step
In 5, determine that the process of Adjusted Option is：
Minimum as optimization aim using adjustment amount, constraints has the stability limitation, negative of the bound of generating set, circuit
Load restraint in the resection of lotus, all kinds of forecast accident and operation constraint, the impact according to adjustable element and on circuit
The candidate spatial that degree is adjusted；Then different adjustment degree of priority is given to generating and load；Further according to candidate spatial
The susceptibility sequence of interior level of sensitivity and the controllable variable including generator output, cutting load amount, determination can
The adjustment amplitude of control variables and size.
Described a kind of power plant based on perturbation theory optimizes the safety on line analysis calculation method sent, and also includes step
6：The Adjusted Option obtaining step 5 carries out Security Checking, if sending, associated sections is no longer out-of-limit or heavy duty, builds as adjustment
View output；Otherwise, expand adjustable element scope in step 3, i.e. expand candidate spatial, again solve scheme, until meeting peace
Whole school's core.
Described a kind of power plant based on perturbation theory optimizes the safety on line analysis calculation method sent, described candidate
Space is adjustable element and current adjustable amount thereof, and wherein element includes unit and load.
The advantage that the present invention optimizes, based on perturbation theory research, the on-line analysis sent is：Computational analysis select be
Based on the actual operating of current electric grid, by obtaining running based on current electric grid based on the unit perturbation analysis of perturbation theory
Scheme is sent in the center power plant optimization of mode, can instruct the method for operation of current electric grid targetedly, mitigates the tired of nest electricity
Border.Need to carry out 168 hours units especially for the power plant that some newly puts into operation and completely send out the situation of trail run debugging, take this online
The scheme that analysis method can adjust in the way of being quickly given and sending for power plant, full the sending out meeting power plant's specific period requires.
Brief description
Fig. 1 is the schematic flow sheet of the present invention；
Fig. 2 is CD power plant periphery electrical network geographical wiring diagram in 2016.
Detailed description of the invention
As a example by calculating is sent in the optimization of Hunan CD power plant 220kV aspect, illustrate to optimize based on the power plant of perturbation theory to send
Application in the actual operating of power system adjusts for the on-line security and stability analysis method going out.Access the western Hunan with CD power plant
Based on rack after NORTEL net, send maximum with CD power plant and turn to target and be optimized the on-line analysis sent and calculate.With CD
Body centered on power plant, it is considered to exerting oneself of other power plant of periphery is carried out single argument adjustment one by one, counts under the different methods of operation
Calculate positive anticorrelation power plant and the susceptibility thereof of line related/section that CD power plant sends, be dispatching of power netwoks plan and operation offer
Reference frame.
CD power plant includes 2 660MW units, grid-connected by 500kV and 220kV respectively.500kV aspect, CD power plant π accesses
Former A-B circuit；220kV aspect, the CD-DS double-circuit line of newly-built 220kV and CD-TZM circuit.CD power plant periphery electrical network is geographical
Wiring diagram is as in figure 2 it is shown, CD power plant line related design parameter is as shown in table 1 below.
Table 1CD power plant sends line parameter circuit value information
Only at CD DS I line, CD DS II line, two stoppages in transit of CD-TZM line three, and CD under steady at present control normal mode
Power plant's #1 machine is exerted oneself and is taked to cut machine measure under conditions of exceeding certain control power；Normal CD DS I line, CD DS II line, CD-TZM
Line list returns stoppage in transit, does not provide corresponding arrangement in steady control.Steady control arrangement under maintenance mode and particular form is not repeated herein
Analyze.
Obtained by sending the N-1 analysis of circuit to CD power plant 220kV aspect：Surely controlling under the normal mode putting into operation, CD
DS I line line and CD DS II line single-hop, do not result in overload；Putting into operation under normal mode in steady control, CD-TZM line single-hop causes
The situation that ST line, FD line isocorrelate pass by load needs exerting oneself of reasonable arrangement periphery 220kV unit.
If sending maximum with G1 to turn to target, it is contemplated that the line related overload situations that CD-TZM line single-hop causes, need control
FD II line processed, ST line and CT line trend, i.e. the grid-connected units of 220kV such as reasonable arrangement SM, YY, CD, SZ, LJT, FT, ZS, JY go out
Power.Putting into operation of 220 kilovolts of grid-connected units of CD power plant, on the one hand can effectively reduce GS recovery main transformer off line, on the other hand, can increase the weight of
FD II line, the trend of ST line.
So-called perturbation theory (perturbs), original meaning be a celestial body when another celestial body moves by rule, because of by other
The impact of celestial body produces 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 considering some circuit/section is CD power plant, therefore carries out one by one exerting oneself of other periphery Power Plant
Single argument adjusts, and calculates the concern susceptibility to periphery power plant for the circuit.With the whole nation unified online power flow data enter row line
Susceptibility computational analysis to unit.
According to management and running experience, sending of CD power plant is affected relatively greatly by exerting oneself of FT power plant, the reality sent out greatly with FT power plant
Border section is point of penetration, analyzes the susceptibility to concern circuit for the perturbation of exerting oneself of different unit.
1) certain section that after CD power plant 220kV puts into operation, FT power plant is sent out greatly is chosen, as state adjusts the December 10 in 2015 issuing
Day 20:30 online datas (FT power plant is sent out greatly)；
2) first initial trend is calculated, record CD power plant and initially the exerting oneself of periphery power plant；
3) perturbation analysis is carried out to the 220kV unit of this section, exerting oneself of this each Power Plant of section of single perturbation, note
The undulating value of record circuit conveying power；
4) Perturbation of the power variation according to concern circuit and unit, tries to achieve the susceptibility to this unit for this circuit；
5) it is ranked up arranging to the susceptibility of concern circuit/unit in this fashion, show that affecting concern sends circuit
And the related unit susceptibility of key sections sorts and influence degree；
6) to control the minimum principle of adjustment amount, according to step 5) in solve susceptibility and step 2) in each unit
Adjustable amount solving-optimizing scheme.
Table 2 is the initial mode of electrical network after putting into operation for CD power plant 220kV aspect, and wherein FT sends out greatly, CD power plant 500kV exerts oneself
It is that the 0th, YY power plant 220kV exerts oneself is 0.Table 3 is based on the 220kV circuit under table 1 initial mode/sensitivity to periphery unit for the section
Degree list.
Electrical network initial mode is given greatly by table 1FT power plant
Table 2FT gives greatly the susceptibility list to unit for the circuit/section
1) in the case that FT sends out greatly, 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 is 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 is the YY second phase.
3) process of little of FT is sent out unanimously with big, only changes the time of online section, is not repeated herein.By little for FT with
FT sends out greatly the sensitivity of initial mode to obtaining：
Contrasting in the case of FT sends out greatly little with FT, the sensitive power plant sequence of institute's column line is identical；FT send out greatly period with
Contrasting in the case of little, power plant's sensitivity difference of institute's column line is less than 1.52%.In the case of FT sends out greatly little with FT right
Ratio, power plant's sensitivity difference of listed section is less than 2.25%.
No matter FT big originating party formula or little originating party formula can be it was initially believed that, to FD2 line, ST line, the shadow of unit susceptibility of CT line
Ring very little.This CD power plant is optimized simultaneously and sends the sensitivity analysis result of calculation comparison calculating with PAS in D5000,
Sensitivity sequence is basically identical, and sensitivity number only has nuance.
Turn to target sending maximum with CD power plant (220kV aspect), must consider to reduce FD II line, ST line and CT line simultaneously
During trend circuit case of heavy load, can refer to the susceptibility of circuit/unit in table 2, according to adjustable amount and the tune of periphery unit
The minimum principle of whole amount determines the Adjusted Option of periphery unit output.According to the start-up mode of actual electric network, section will be sent
The strong periphery unit output that periphery unit output suitably reduces, inverse correlation is strong of positive correlation suitably increases, and mitigates and sends section weight
Load situation, thus improve the ability to send outside of CD power plant.
Claims (5)
1. the power plant based on perturbation theory optimizes the safety on line analysis calculation method sent, it is characterised in that under including
State step：
The real-time data of power grid of discontinuity surface when step 1, selection concern；
Step 2, carry out initial Load flow calculation work according to the real-time data of power grid in step 1, and obtain initial power flow solutions and be
Operation of power networks state, records center power plant meritorious is exerted oneself and the meritorious of periphery power plant of center power plant place section is exerted oneself, note
Current trend value and the direction sending related heavily loaded section to center power plant of record；
Step 3, according to the switch on condition in the initial power flow solutions of step 2, each power plant of centering electrocardio factory place section is different
The unit of voltage aspect carries out perturbation analysis one by one, and records corresponding center power plant and send circuit and the trend meter of heavy duty section
Calculate result；
Step 4, according to each unit Perturbation and the change of power flow sending line related in step 3, calculate and try to achieve middle electrocardio
Factory sends circuit and the heavy duty susceptibility numerical value to each unit for the section；
Step 5, the susceptibility numerical value according to each circuit obtaining in step 4, be ranked up to unit arranging, obtain affecting center
Power plant sends circuit and the heavy duty unit susceptibility numerical ordering of section and influence degree, by unit in the initial trend of step 2
Exert oneself and obtain the adjustable space of each unit and unit adjusts constraint, and the related unit of each circuit obtaining in step 4
Sensitivity value, determines Adjusted Option according to the standard that adjustable element and adjustment amount are minimum.
2. a kind of power plant based on perturbation theory according to claim 1 optimizes the safety on line analytical calculation side sending
Method, it is characterised in that in described step 3, described perturbation analysis process is：Artificially adjust going out of periphery unit in simulations
Power size so that the trend generation fluctuation sending circuit and heavy duty section of center power plant, single this section of adjustment is each i.e. one by one
The meritorious of individual Power Plant is exerted oneself, and all carries out Load flow calculation, the week before and after record adjustment before and after adjusting unit output
While send circuit and the trend value of heavy duty section.
3. a kind of power plant based on perturbation theory according to claim 1 optimizes the safety on line analytical calculation side sending
Method, it is characterised in that in described step 5, determines that the process of Adjusted Option is：
Using adjustment amount minimum as optimization aim, constraints has the bound of generating set, the stability limitation of circuit, load
Load restraint in resection, all kinds of forecast accident and operation constraint, the influence degree according to adjustable element and to circuit
The candidate spatial being adjusted；Then different adjustment degree of priority is given to generating and load；Further according in candidate spatial
The susceptibility sequence of level of sensitivity and the controllable variable including generator output, cutting load amount, determines controllable
The adjustment amplitude of variable and size.
4. a kind of power plant based on perturbation theory according to claim 1 optimizes the safety on line analytical calculation side sending
Method, it is characterised in that also include step 6：The Adjusted Option obtaining step 5 carries out Security Checking, if sending associated sections not
Out-of-limit again or heavy duty then advises output as adjusting；Otherwise, expand adjustable element scope in step 3, i.e. expand candidate spatial,
Again scheme is solved, until meeting Security Checking.
5. a kind of power plant based on perturbation theory according to claim 3 or 4 optimizes the safety on line analytical calculation sent
Method, it is characterised in that described candidate spatial is adjustable element and current adjustable amount thereof, and wherein element includes machine
Group and load.
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