CN109740855A - Meter and the load restoration ability estimation on line method of key sections limit constraint - Google Patents
Meter and the load restoration ability estimation on line method of key sections limit constraint Download PDFInfo
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Abstract
The invention discloses meter and the load restoration ability estimation on line methods of key sections limit constraint, generate load aggregation to be restored based on system protection, source net G system cutting load action message and are ranked up according to load priority and load restoration performance indicator；Restore the online regulation measure spaces of generations such as plan, new energy predictive information based on the current method of operation of power grid and direct current, and is ranked up according to measure priority and measure performance of control index；It is generated based on the current method of operation of power grid and recovery scheme and envisions mode after restoring and carry out Load flow calculation, key sections are out-of-limit if it exists, comprehensively consider trend sensitivity under priority and anticipation mode and resequence to load restoration set and regulation measure space, be then based on ranking results select measure eliminate it is out-of-limit, and according to aid decision result update load restoration ability.The present invention counts and the load restoration ability rapid evaluation of key sections limit constraint, and period regulation personnel are to load restoration capability analysis calculating speed and accuracy requirement under real time operation mode after meeting the disposition of extra-high voltage direct-current failure.
Description
Technical field
The invention belongs to power system automation technology fields, and specifically the present invention relates to meter and key sections limits about
The load restoration ability estimation on line method of beam.
Background technique
To cope with the greater impact caused by receiving end power grid of extra-high voltage direct-current failure, Jiangsu Power Grid proposes construction " big rule
The thinking of mould source net lotus close friend interaction systems ", the system take the load control system measure of two kinds of different time spans, realize that two is big main
Function.First is that system protection fast cut back function, implements the control of the first time limit.For frequency urgent control requirement, setting Soviet Union
South, northern Suzhou cutting load control centre station, interconnect, quick cut-out can with the urgent coordinated control system of East China Power Grid frequency
Interruptible load.Second is that friendly interact accurate cutting load function, implement the control of the second time limit.For Power System Steady-state problem, implementation can
The accurate real-time control of interruptible load.
So, the later period is disposed in extra-high voltage direct-current failure, a large number of users load cut off using accurate load control system means,
How these loads quickly and effectively restore to lack effective intelligent supporting method.The conventionally employed method manually determined is come true
Determine whether current system has the problems such as load restoration ability, can restore how many, how to restore, it is difficult to meet quick load recovery
Requirement, or even there are the risks that new failure is induced derived from load restoration process.
Summary of the invention
Object of the present invention is to: it is born to meet period regulation personnel after the disposition of extra-high voltage direct-current failure under real time operation mode
Lotus recovery capability is accurate, rapid evaluation requirement, and the load restoration ability for providing meter and the constraint of key sections limit is estimated online
Calculation method, the present invention carry out the load restoration ability rapid evaluation of key sections limit constraint, meet at extra-high voltage direct-current failure
Period regulation personnel are postponed to load restoration capability analysis calculating speed and accuracy requirement under real time operation mode, effectively support is special
High voltage direct current failure disposes the control decision of later period load restoration.
To achieve the above object, the technical solution adopted by the present invention, specific as follows:
Meter and the load restoration ability estimation on line method of key sections limit constraint, comprising the following steps:
1) the cutting load action message of the system protection based on acquisition, source net G system generates load aggregation L to be restored0,
If load aggregation L to be restored0It is not sky, enters step 2), otherwise, exit load restoration ability estimation on line；
2) model parameter based on power grid and current operating status generate basic method of operation F0, based on basic operation side
Formula F0, preassigned regulation measure, direct current recovery plan, tie line plan and new energy predictive information generate online regulation and arrange
Apply space C0；
3) based on basic method of operation F0Under load aggregation L to be restored0In each load it is sensitive to the trend of each key sections
Degree calculates the restorability index of each load, considers that the restorability index of load priority and each load generates to be restored bear
Lotus ordered set L1；
4) based on basic method of operation F0Online regulation measure space C down0In each measure it is sensitive to the trend of each key sections
Degree and measure response time calculate the performance of control index of each measure, consider the performance of control index of measure priority and measure
Generate regulation measure Sorting space C1；
5) basic method of operation F is calculated based on frequency estimation0Generated energy P needed for frequency retrievalf, according to load to be restored
Ordered set L1In load total amount to be restored, regulation measure Sorting space C1In can with power generation total amount and frequency retrieval needed for hair
Electricity Pf, and consider that system losses and spinning reserve determine that load can restore total amount and matched regulation power generation total amount, to extensive
Multiple load ordered set L1, regulation measure Sorting space C1It is middle that load can be restored into total amount and matched regulation power generation total amount respectively
Share in order to each load to be restored and each regulation measure；
6) based on basic method of operation F0, load ordered set L to be restored1, regulation measure Sorting space C1It generates after restoring
Anticipation mode F1, Load flow calculation is carried out, and judge whether key sections are out-of-limit, and key sections are got over if it exists according to cross-section limitation
7) limit, enters step, otherwise enters step 8)；
7) based on anticipation mode F after restoring1Under load ordered set L to be restored1In restored load to each out-of-limit section
Trend sensitivity calculates the aid decision performance indicator of each load, comprehensively considers load priority and load aid decision performance
Index is to load ordered set L to be restored1Rearrangement；Based on anticipation mode F after recovery1Down regulation sequence for measures space C1In
Can trend sensitivity with measure to each out-of-limit section, calculate the aid decision performance indicator of each regulation measure, consider that measure is excellent
First grade and measure aid decision performance indicator are to regulation sequence for measures space C1Rearrangement；According to regulation measure Sorting space C1
Rearrangement successively select ancillary measure solve cross section limit, terminate if it can not solve, otherwise according to aid decision result
Update load ordered set L to be restored1, regulation measure Sorting space C1In load can restore power and regulation measure control amount；
8) load ordered set L to be restored is counted1Middle recovery load total amount be load currently can recovery capability, regulation measure
Sorting space C1It is middle that measure is used to need the mating regulation measure taken, regulation measure Sorting space C for load restoration1In all adopt
Being with the maximum regulation time of measure currently can recovery capability be corresponding estimates time-consuming.
Load aggregation L to be restored is generated in step 1)0, specifically includes the following steps:
There is N in power gridLA load to be restored,For i-th of load to be restored, then NLA load to be restored is constituted to extensive
Multiple load aggregation L0:
Step 2) generates online regulation measure space C0, specifically includes the following steps:
There is N in power gridCA controllable measure, j-th of regulation measureCurrent power beMaximum power isMeasure available flag is(0 is no, and 1 is), then NCA regulation measure forms online regulation measure space C0:
The regulation measure type of regulation measure includes internal routine or the adjustment of new energy unit output, unit booting, contact
Line Plan rescheduling and DC power modulation.
The step 3) specifically includes the following steps:
3-1) based on basic method of operation F0Under load aggregation L to be restored0In each load it is sensitive to the trend of each key sections
Degree calculates the restorability index of each load
Wherein,For the restorability index of i-th of load to be restored,For F0The nargin of lower k-th of section,For F0The active power of lower k-th of section,For the stability limitation of k-th of section,For F0It is i-th lower
Load to be restored to the active po wer sensitivity of k-th of key sections,For F0Lower i-th of load to be restored is taken the photograph
Dynamic variable quantity and k-th of section active power variable quantity, N because caused by perturbing load0,INTFor F0Lower section narginIt is less than
Specified threshold value ε0,INTKey sections number,WithRespectively F0Lower i-th of load to be restored is to each key sections
Synthesis active po wer sensitivity and corresponding per unit value,It indicatesIt takes absolute value；
3-2) according to each load priorityFrom small to large to L0It is ranked up, obtains load to be restored and tentatively sort collection
Close L0'；Restorability index according to each loadFrom big to small to L0' middle consistent measure the progress of load priority is internal
Second level sequence, obtains load ordered set L to be restored1:
Wherein,For set L1In i-th of load to be restored,WithRespectively set L1In i-th it is to be restored
The restorability index and load priority of load, if it is in L0In be ordered as i0, then
Regulation measure Sorting space C is generated in the step 4)1, specifically includes the following steps:
4-1) it is based on F0Lower C0In each measure each measure is calculated to the trend sensitivity of each key sections and measure response time
Performance of control index
Wherein,For the performance of control index of j-th of regulation measure,K-th is closed for j-th of regulation measure
The active po wer sensitivity of key section,WithRespectively F0The perturbation variable quantity of lower j-th of regulation measure and k-th
Section active power variable quantity because caused by perturbing measure power,For for F0The nargin of lower k-th of section,WithRespectively j-th of regulation measure to the synthesis active po wer sensitivity and corresponding per unit value of each key sections,WithThe climbing rate of respectively j-th regulation measure and corresponding per unit value,WithRespectively j-th of regulation measure
Available delay time and corresponding per unit value,It indicatesIt takes absolute value,It indicatesIt takes absolute value；
4-2) according to each regulation measure priorityFrom small to large to C0It is ranked up, is regulated sequence for measures space
C0'；According to each regulation measure load restoration performance indicatorFrom big to small to C0' in the consistent measure of measure priority carry out
Internal secondary sequence, is regulated sequence for measures space C1:
Wherein,For set C1In j-th of regulation measure,WithRespectively
C1In j-th of regulation measure load restoration performance indicator, measure priority, current power, maximum power and measure can with mark
Will.
The step 5) specifically includes the following steps:
5-1)F0Lower power grid current frequency is f0, rated frequency fr, then generated energy P needed for frequency retrievalfCalculation method
Are as follows:
Wherein, PLFor F0Lower load is the sum of active, KLFor the active static frequency characteristic coefficient of load of power grid, KSFor power grid
Network Loss Rate,WithRespectively C1In j-th of regulation measure current power, maximum power；
5-2)F0The lower current spare capacity of power grid is Pb,0, spare capacity requirement is Pb,r, by C1Sequence passes sequentially through following formula meter
Calculate the spare capacity surplus after j-th of regulation measure usesUntilOr it all calculates and completes:
Wherein,WithRespectively C1The spinning reserve unit mark of k-th of regulation measure
Will (0 no 1 is), measure available flag, maximum power and current power；
If it existsThen enable the available regulation measure number N after considering spinning reserveC,b=j and by subsequent all categories
It is set to 0 in the measure available flag of spinning reserve unit, and modifies the maximum power of j-th of regulation measure；Otherwise N is enabledC,b=
NC；
L 5-3) is calculated by formula (5-3-1)-(5-3-3)1In load total amount PL to be restored1,h, C1In can with power generation total amount
PC1,h, it is contemplated that load total amount PH can be restored1:
PH1=min (PL1,h,(PC1,h-Pf)×(1-KS))(5-3-3)
Wherein,For L1In i-th of load to be restored active power,WithRespectively C1In
Measure available flag, current power and the maximum power of j-th of regulation measure, KSFor the Network Loss Rate of power grid, PfFor frequency retrieval institute
The generated energy needed；
5-4) press L1What sequence passed sequentially through that formula (5-4-1) calculate i-th load restores powerUntilOr it all calculates and completes:
If it existsSubsequent all loads to be restored then can be restored into powerIt is set to 0:
5-5) press C1Sequence passes sequentially through formula (5-5) and calculates the control amount that j-th of regulation measure matched load is restored
UntilOr it all calculates and completes:
If it existsThen by the control amount of subsequent regulation measureIt is set to 0:
The step 7) specifically includes the following steps:
7-1) it is based on F1Lower L1In restored load to the aid decision of each load of trend Calculation of Sensitivity of each out-of-limit section
Performance indicatorBased on F1Lower C1In can be with measure to the auxiliary of each regulation measure of trend Calculation of Sensitivity of each out-of-limit section
Help decision performance indicator
Wherein,For F1The nargin of lower k-th of section,For F1The active power of lower k-th of section,
For the stability limitation of k-th of section,For F0Lower i-th of load to be restored to the active po wer sensitivity of k-th of key sections,For F1The perturbation variable quantity and k-th of section of lower i-th of load to be restored are because caused by perturbing load
Active power variable quantity, N1,INTFor F1Lower section narginKey sections number less than 0,WithRespectively F1Lower the
I loads to be restored to the synthesis active po wer sensitivity and corresponding per unit value of each key sections,For j-th of regulation measure
To the active po wer sensitivity of k-th of key sections,WithRespectively F1The perturbation variable quantity of lower j-th of regulation measure
With k-th of section because measure power perturbation caused by active power variable quantity,WithRespectively j-th of regulation measure
To the synthesis active po wer sensitivity and corresponding per unit value of each key sections,It indicatesIt takes absolute value,It indicates
It takes absolute value；
7-2) according to each load priorityFrom big to small to L1It resequences, and according further to each load
Aid decision performance indicatorFrom big to small to L1The middle consistent measure of load priority carries out internal secondary sequence；Foundation
Each regulation measure priority(it is higher to be worth smaller priority) is from big to small to C1It resequences, and according further to each
The aid decision performance indicator of regulation measureFrom big to small to C1The middle consistent measure of measure priority carries out internal secondary
Sequence；
7-3) initialization control step-lengthWith control precision ε step；
7-4) enable the control step-length of the m times iterationAccording to L1And C1Sequence is selected by ancillary measure
Rule successively selects ancillary measure and makes the control amount to beJudge whether cross section limit can solve based on sensitivity, if out-of-limit
It solves then to enter 7-5)；If it is unresolved but still have measure it is available if enable m=m+1 enter 7-4)；Otherwise out-of-limit to eliminate, enter
7-5)；
If 7-5) out-of-limit solution, according to cross section limit aid decision measure, restoring power, regulating and controlling to arrange for load is updated
The control amount applied；It need not be updated if out-of-limit do not solve；
Wherein,For L1In i-th of load aid decision amount,For C1In j-th of regulation measure auxiliary
Decision content.
Ancillary measure picking rule the following steps are included:
A) by wattful power after the matched control for sending receiving end control amount and each section of each step-length need of formula (7-4-1) calculating
Rate；
Wherein, Pr is that receiving end controls surplus, and Ps is that sending end controls surplus,It is active after control for k-th of section
Power, KSFor the Network Loss Rate of power grid,For F1The active power of lower k-th of section,For the control step of the m times iteration
It is long, m >=0；
B) sending end control considers regulation measure drop power output: pressing C1Positive sequence is successively handled, if measure available flagAndAnd Ps > 0, then:
Wherein, εsFor active po wer sensitivity threshold value,Active spirit for j-th of regulation measure to k-th of key sections
Sensitivity,For the aid decision amount of j-th of regulation measure,WithRespectively j-th of regulation measure
Current power, the control amount restored of minimum power and matched load, the present embodiment εsTake 0.1；
C) regulation measure increasing power output is paid the utmost attention in receiving end control: by C1Inverted order is successively handled, if measure available flagAndAnd Pr > 0, then:
If d) receiving end regulation measure increases power output insufficient space, consider that receiving end has restored load and reduced amount of recovery: by L1Just
Sequence is successively handled, ifAndAnd Pr > 0, then:
If e) all sections all meetThen out-of-limit elimination, it is otherwise out-of-limit not eliminate.
Step 8) the load currently can recovery capability be formula (8-1):
Currently can corresponding estimate time-consuming of recovery capability be formula (8-2):
Wherein, PL1,h,realFor L1Reality can restore load total amount i.e. load currently can recovery capability,For L1In
I-th load restores power, T1For currently can recovery capability estimate time-consuming,With
Respectively C1In j-th of regulation measure measure available flag, can with delay time, matched load restore control amount and climbing
Rate.
Model parameter includes the static parameter of generator, load, exchange line segment, transformer, direct current line segment and capacitive reactance device.
Beneficial effect of the present invention includes:
The invention proposes meter and the load restoration ability estimation on line methods of key sections limit constraint, are protected based on system
Shield, source net G system cutting load action message generate load aggregation to be restored and refer to according to load priority and load restoration performance
Mark is ranked up；Regulate and control to arrange online based on the generations such as the current method of operation of power grid and direct current recovery plan, new energy predictive information
Space is applied, and is ranked up according to measure priority and measure performance of control index；It is to be restored according to load based on ranking results
Total amount, regulatable power generation total amount, and consider that system losses, spinning reserve, frequency character of load determine load restoration ability, extensive
Compound case；It is generated based on the current method of operation of power grid and recovery scheme and envisions mode after restoring and carry out Load flow calculation, if it exists
Key sections are out-of-limit, and it is empty to load restoration set and regulation measure to comprehensively consider trend sensitivity under priority and anticipation mode
Between resequence, be then based on ranking results select measure eliminate it is out-of-limit, and according to aid decision result update load restoration energy
Power.
Invention considers the influence of load priority and load to safety and stability and is ranked up to load to be restored, is guaranteeing
It is preferential to restore to reduce the influence to safety and stability while important ratio higher load user；It is extensive that regulation measure considers direct current
The information such as multiple plan, new energy prediction, ensure that the accuracy and exploitativeness of regulation measure boundary condition；To regulation measure
The calculating of Control performance standard comprehensively considers response speed and the impact factor to safety and stability, preferentially more using response speed
Fastly, smaller measure is influenced on safety and stability so that load restoration faster, it is safer；To the key under anticipation mode after recovery
Cross section limit problem is quickly estimated based on the sensitivity information under anticipation mode and solves out-of-limit required control amount and modified load
Recovery capability improves computational efficiency.The load restoration ability of meter and the constraint of key sections limit can be carried out using the present invention
Rapid evaluation, period regulation personnel are to load restoration capability analysis meter under real time operation mode after meeting the disposition of extra-high voltage direct-current failure
Speed and accuracy requirement is calculated, effectively extra-high voltage direct-current failure is supported to dispose the control decision of later period load restoration.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples；
Fig. 1 is the flow chart of the load restoration ability estimation on line method of present invention meter and the constraint of key sections limit.
Specific embodiment
The invention will be further described with reference to the accompanying drawing and by specific embodiment, and following embodiment is descriptive
, it is not restrictive, this does not limit the scope of protection of the present invention.
In order to make technological means of the invention, creation characteristic, workflow, application method reach purpose and effect, and it is
It is easy to understand the evaluation method with reference to specific embodiments the present invention is further explained.
The invention will be further described with reference to the accompanying drawings and in conjunction with example.
As shown in Figure 1, meter and the load restoration ability estimation on line method of key sections limit constraint, including following step
It is rapid:
1) the cutting load action message of the system protection based on acquisition, source net G system generates load aggregation L to be restored0,
If load aggregation L to be restored0It is not sky, enters step 2), otherwise, exit load restoration ability estimation on line；
2) model parameter based on power grid and current operating status generate basic method of operation F0, based on basic operation side
Formula F0, preassigned regulation measure, direct current recovery plan, tie line plan and new energy predictive information generate online regulation and arrange
Apply space C0；
Model parameter includes the static parameter (packet of generator, load, exchange line segment, transformer, direct current line segment and capacitive reactance device
Include equipment limit value, resistance and reactance).
3) based on basic method of operation F0Under load aggregation L to be restored0In each load it is sensitive to the trend of each key sections
Degree calculates the restorability index of each load, considers that the restorability index of load priority and each load generates to be restored bear
Lotus ordered set L1；
4) based on basic method of operation F0Online regulation measure space C down0In each measure it is sensitive to the trend of each key sections
Degree and measure response time calculate the performance of control index of each measure, consider the performance of control index of measure priority and measure
Generate regulation measure Sorting space C1；
5) basic method of operation F is calculated based on frequency estimation0Generated energy P needed for frequency retrievalf, according to load to be restored
Ordered set L1In load total amount to be restored, regulation measure Sorting space C1In can with power generation total amount and frequency retrieval needed for hair
Electricity Pf, and consider that system losses and spinning reserve determine that load can restore total amount and matched regulation power generation total amount, to extensive
Multiple load ordered set L1, regulation measure Sorting space C1It is middle that load can be restored into total amount and matched regulation power generation total amount respectively
Share in order to each load to be restored and each regulation measure；
6) based on basic method of operation F0, load ordered set L to be restored1, regulation measure Sorting space C1It generates after restoring
Anticipation mode F1, Load flow calculation is carried out, the present embodiment envisions mode F1's by PQ+ Niu Lafa Load flow calculation, after being restored
Trend distribution, and judge whether key sections are out-of-limit, and key sections are out-of-limit if it exists according to cross-section limitation, it enters step 7), it is no
It then enters step 8)；Step 6) carries out Load flow calculation, and judges whether key sections are out-of-limit according to cross-section limitation and belong to this field
Common technology means, the present embodiment are no longer described in detail.
7) based on anticipation mode F after restoring1Under load ordered set L to be restored1In restored load to each out-of-limit section
Trend sensitivity calculates the aid decision performance indicator of each load, comprehensively considers load priority and load aid decision performance
Index is to load ordered set L to be restored1Rearrangement；Based on anticipation mode F after recovery1Down regulation sequence for measures space C1In
Can trend sensitivity with measure to each out-of-limit section, calculate the aid decision performance indicator of each regulation measure, consider that measure is excellent
First grade and measure aid decision performance indicator are to regulation sequence for measures space C1Rearrangement；According to regulation measure Sorting space C1
Rearrangement successively select ancillary measure solve cross section limit, terminate if it can not solve, otherwise according to aid decision result
Update load ordered set L to be restored1, regulation measure Sorting space C1In load can restore power and regulation measure control amount,
It enters step 8)；
8) load ordered set L to be restored is counted1Middle recovery load total amount be load currently can recovery capability, regulation measure
Sorting space C1It is middle that measure is used to need the mating regulation measure taken, regulation measure Sorting space C for load restoration1In all adopt
Being with the maximum regulation time of measure currently can recovery capability be corresponding estimates time-consuming.
Load aggregation L to be restored is generated in step 1)0, specifically includes the following steps:
There is N in power gridLA load to be restored,For i-th of load to be restored, then NLA load to be restored is constituted to extensive
Multiple load aggregation L0:
Step 2) generates online regulation measure space C0, specifically includes the following steps:
There is N in power gridCA controllable measure, j-th of regulation measureCurrent power beMaximum power isMeasure available flag is(0 is no, and 1 is), then NCA regulation measure forms online regulation measure space C0:
The regulation measure type of regulation measure includes internal routine or the adjustment of new energy unit output, unit booting, contact
Line Plan rescheduling and DC power modulation.Special, if j-th of regulation measure is new energy measure,For new energy
Prediction power output.
The step 3) specifically includes the following steps:
3-1) based on basic method of operation F0Under load aggregation L to be restored0In each load it is sensitive to the trend of each key sections
Degree calculates the restorability index of each load
Wherein,For the restorability index of i-th of load to be restored,For F0The nargin of lower k-th of section,For F0The active power (direction for taking power to be positive is section positive direction) of lower k-th of section,It is k-th
The stability limitation (taking positive limit) of section,For F0Active spirit of lower i-th of the load to be restored to k-th of key sections
Sensitivity (being positive indicates to be located at the sending end of section, is otherwise located at receiving end),For F0Lower i-th to be restored negative
The perturbation variable quantity (generally 1) and k-th of section of lotus active power variable quantity, N because caused by perturbing load0,INTFor F0Under
Section narginLess than specified threshold value ε0,INTKey sections number,WithRespectively F0Lower i-th to be restored negative
Lotus to the synthesis active po wer sensitivity and corresponding per unit value of each key sections,It indicatesIt takes absolute value, the present embodiment ε0,
INT takes 0.3.
3-2) according to each load priority(it is higher to be worth smaller priority) is from small to large to L0Be ranked up, obtain to
At the beginning of restoring load
Walk ordered set L0′；Restorability index according to each loadFrom big to small to L0' middle load priority one
The measure of cause carries out internal secondary sequence, obtains load ordered set L to be restored1:
Wherein,For set L1In i-th of load to be restored,WithRespectively set L1In i-th it is to be restored
The restorability index and load priority of load, if it is in L0In be ordered as i0, then
Regulation measure Sorting space C is generated in the step 4)1, specifically includes the following steps:
4-1) it is based on F0Lower C0In each measure each measure is calculated to the trend sensitivity of each key sections and measure response time
Performance of control index
Wherein,For the performance of control index of j-th of regulation measure,K-th is closed for j-th of regulation measure
The active po wer sensitivity (being positive indicates to be located at the sending end of section, is otherwise located at receiving end) of key section,WithRespectively
F0The perturbation variable quantity (the present embodiment 1) and k-th of section of lower j-th of regulation measure have because caused by perturbing measure power
Function power variation,For for F0The nargin of lower k-th of section,WithRespectively j-th of regulation measure is to each key
The synthesis active po wer sensitivity and corresponding per unit value of section,WithThe climbing rate and phase of respectively j-th regulation measure
The per unit value answered,WithThe available delay time and corresponding per unit value of respectively j-th regulation measure,Table
ShowIt takes absolute value,It indicatesIt takes absolute value；
4-2) according to each regulation measure priority(it is higher to be worth smaller priority) is from small to large to C0It is ranked up, obtains
To regulation measure Sorting space C0'；According to each regulation measure load restoration performance indicatorFrom big to small to C0' in measure it is excellent
The first consistent measure of grade carries out internal secondary sequence, is regulated sequence for measures space C1:
Wherein,For set C1In j-th of regulation measure,WithRespectively
C1In j-th of regulation measure load restoration performance indicator, measure priority, current power, maximum power and measure can with mark
Will, if j-th of regulation measure is in C0In be ordered as j0, then measure priorityLoad restoration performance indicatorIts dependent variable and so on.
The step 5) specifically includes the following steps:
5-1)F0Lower power grid current frequency is f0, rated frequency fr, then generated energy P needed for frequency retrievalfCalculation method
Are as follows:
Wherein, PLFor F0Lower load is the sum of active, KLFor the active static frequency characteristic coefficient of load of power grid, KSFor power grid
Network Loss Rate,WithRespectively C1In j-th of regulation measure current power, maximum power.Section 2 is worked as in formula
J works when belonging to new energy unit and its prediction power output less than current power output, whenIt is 0 that max is taken when being negative
The exactly purpose of formula；Even new energy unit future contributesLess than current power outputPower grid can lose power generation
Power, need to fall into a trap in frequence estimation and.
5-2)F0The lower current spare capacity of power grid is Pb,0, spare capacity requirement is Pb,r, by C1Sequence passes sequentially through following formula meter
Calculate the spare capacity surplus after j-th of regulation measure usesUntilOr it all calculates and completes:
Wherein,WithRespectively C1The spinning reserve unit mark of k-th of regulation measure
Will (0 no 1 is), measure available flag, maximum power and current power.
If it existsThen enable the available regulation measure number N after considering spinning reserveC,b=j and by subsequent all categories
It is set to 0 in the measure available flag of spinning reserve unit, and modifies the maximum power of j-th of regulation measure；Otherwise N is enabledC,b=
NC；
L 5-3) is calculated by formula (5-3-1)-(5-3-3)1In load total amount PL to be restored1,h, C1In can with power generation total amount
PC1,h, it is contemplated that load total amount PH can be restored1:
PH1=min (PL1,h,(PC1,h-Pf)×(1-KS)) (5-3-3)
Wherein,For L1In i-th of load to be restored active power,WithRespectively C1In
Measure available flag, current power and the maximum power of j-th of regulation measure, KSFor the Network Loss Rate of power grid, PfFor frequency retrieval institute
The generated energy needed.
5-4) press L1What sequence passed sequentially through that formula (5-4-1) calculate i-th load restores powerUntilOr it all calculates and completes:
If it existsSubsequent all loads to be restored then can be restored into powerIt is set to 0:
5-5) press C1Sequence passes sequentially through formula (5-5) and calculates the control amount that j-th of regulation measure matched load is restored
UntilOr it all calculates and completes:
If it existsThen by the control amount of subsequent regulation measureIt is set to 0:
The step 7) specifically includes the following steps:
7-1) it is based on F1Lower L1In restored load to the aid decision of each load of trend Calculation of Sensitivity of each out-of-limit section
Performance indicatorBased on F1Lower C1In can be with measure to the auxiliary of each regulation measure of trend Calculation of Sensitivity of each out-of-limit section
Help decision performance indicator
Wherein,For for F1The nargin of lower k-th of section,For F1The active power of lower k-th of section (takes power
The direction being positive is section positive direction),For the stability limitation (taking positive limit) of k-th of section,For F0Under
I-th of load to be restored to the active po wer sensitivity of k-th of key sections (being positive indicates to be located at the sending end of section, be otherwise located at by
End),For F1The perturbation variable quantity (generally 1) of lower i-th of load to be restored and k-th of section are because of load
Active power variable quantity caused by perturbation, N1,INTFor F1Lower section narginKey sections number less than 0,With
Respectively F1Lower i-th of load to be restored to the synthesis active po wer sensitivity and corresponding per unit value of each key sections,It is
J regulation measure to the active po wer sensitivity of k-th of key sections (being positive indicates to be located at the sending end of section, is otherwise located at receiving end),WithRespectively F1The perturbation variable quantity (generally 1) of lower j-th of regulation measure and k-th of section are because of measure function
Active power variable quantity caused by rate perturbation,WithSynthesis of respectively j-th of the regulation measure to each key sections
Active po wer sensitivity and corresponding per unit value,It indicatesIt takes absolute value,It indicatesIt takes absolute value；.
7-2) according to each load priorityFrom big to small to L1It resequences, and according further to each load
Aid decision performance indicatorFrom big to small to L1The middle consistent measure of load priority carries out internal secondary sequence；Foundation
Each regulation measure priority(it is higher to be worth smaller priority) is from big to small to C1It resequences, and according further to each
The aid decision performance indicator of regulation measureFrom big to small to C1The middle consistent measure of measure priority carries out internal secondary
Sequence.
7-3) enable initial control step-lengthControl precision εstep=50MW.
7-4) enable the control step-length of the m times iterationAccording to L1、C1Sequence selects rule by ancillary measure
Then successively selecting ancillary measure makes the control amount to beJudge whether cross section limit can solve based on sensitivity, if out-of-limit solution
Certainly then enter 7-5)；If it is unresolved but still have measure it is available if enable m=m+1 enter 7-4)；Otherwise out-of-limit to eliminate, into 7-
5)；
Ancillary measure picking rule the following steps are included:
A) by wattful power after the matched control for sending receiving end control amount and each section of each step-length need of formula (7-4-1) calculating
Rate.
Wherein, Pr is that receiving end controls surplus (including increasing power output load down), and Ps is that sending end controls surplus (including drop power output),For active power after the control of k-th of section, KSFor the Network Loss Rate of power grid,For F1Lower k-th of section has
Function power,For the control step-length of the m times iteration, m >=0.
B) sending end control considers regulation measure drop power output: pressing C1Positive sequence is successively handled, if measure available flagAndAnd Ps > 0, then:
Wherein, εsFor active po wer sensitivity threshold value,Active spirit for j-th of regulation measure to k-th of key sections
Sensitivity,For the aid decision amount of j-th of regulation measure,WithRespectively j-th of regulation measure
Current power, the control amount restored of minimum power and matched load, the present embodiment εsTake 0.1；
C) regulation measure increasing power output is paid the utmost attention in receiving end control: by C1Inverted order is successively handled, if measure available flagAndAnd Pr > 0, then:
If d) receiving end regulation measure increases power output insufficient space, consider that receiving end has restored load and reduced amount of recovery: by L1Just
Sequence is successively handled, ifAndAnd Pr > 0, then:
If e) all sections all meetThen out-of-limit elimination, it is otherwise out-of-limit not eliminate.
If 7-5) out-of-limit solution, according to cross section limit aid decision measure, restoring power, regulating and controlling to arrange for load is updated
The control amount applied；It need not be updated if out-of-limit do not solve；
Wherein,For L1In i-th of load aid decision amount,For C1In j-th of regulation measure auxiliary
Decision content.
Step 8) the load currently can recovery capability be formula (8-1):
Currently can corresponding estimate time-consuming of recovery capability be formula (8-2):
Wherein, PL1,h,realFor L1Reality can restore load total amount i.e. load currently can recovery capability,For L1In
I-th load restores power, T1For currently can recovery capability estimate time-consuming,With
Respectively C1In j-th of regulation measure measure available flag, can with delay time, matched load restore control amount and climbing
Rate.
In the instructions provided here, numerous specific details are set forth.It is to be appreciated, however, that implementation of the invention
Example can be practiced without these specific details.In some instances, well known method, knot is not been shown in detail
Structure and technology, so as not to obscure the understanding of this specification.
Similarly, it should be understood that in order to simplify the disclosure and help to understand one or more of the various inventive aspects,
Above in the description of exemplary embodiment of the present invention, each feature of the invention is grouped together into single implementation sometimes
In example, figure or descriptions thereof.However, the disclosed method should not be interpreted as reflecting the following intention: i.e. required to protect
Shield the present invention claims than feature more features expressly recited in each claim.More precisely, as right is wanted
As asking book to reflect, inventive aspect is all features less than single embodiment disclosed above.Therefore, it then follows specific
Thus claims of embodiment are expressly incorporated in the specific embodiment, wherein each claim itself is as this
The separate embodiments of invention.
Those skilled in the art should understand that the module of the equipment in example disclosed herein or unit or groups
Between can be arranged in equipment as depicted in this embodiment, or alternatively can be positioned at and the equipment in the example
In different one or more equipment.Module in aforementioned exemplary can be combined into a module or furthermore be segmented into multiple
Submodule.
Those skilled in the art will understand that can be carried out adaptively to the module in the equipment in embodiment
Change and they are arranged in one or more devices different from this embodiment.It can be the module or list in embodiment
Be combined into one between module or unit or group between member or group, and furthermore they can be divided into multiple submodule or subelement or
Between subgroup.Other than such feature and/or at least some of process or unit exclude each other, it can use any
Combination is to all features disclosed in this specification (including adjoint claim, abstract and attached drawing) and so disclosed
All process or units of what method or apparatus are combined.Unless expressly stated otherwise, this specification is (including adjoint power
Benefit require, abstract and attached drawing) disclosed in each feature can carry out generation with an alternative feature that provides the same, equivalent, or similar purpose
It replaces.
In addition, it will be appreciated by those of skill in the art that although some embodiments described herein include other embodiments
In included certain features rather than other feature, but the combination of the feature of different embodiments mean it is of the invention
Within the scope of and form different embodiments.For example, in the following claims, embodiment claimed is appointed
Meaning one of can in any combination mode come using.
In addition, be described as herein can be by the processor of computer system or by executing by some in the embodiment
The combination of method or method element that other devices of the function are implemented.Therefore, have for implementing the method or method
The processor of the necessary instruction of element forms the device for implementing this method or method element.In addition, Installation practice
Element described in this is the example of following device: the device be used for implement as in order to implement the purpose of the invention element performed by
Function.
Various technologies described herein are realized together in combination with hardware or software or their combination.To the present invention
Method and apparatus or the process and apparatus of the present invention some aspects or part can take insertion tangible media, such as it is soft
The form of program code (instructing) in disk, CD-ROM, hard disk drive or other any machine readable storage mediums,
Wherein when program is loaded into the machine of such as computer etc, and is executed by the machine, the machine becomes to practice this hair
Bright equipment.
In the case where program code executes on programmable computers, calculates equipment and generally comprise processor, processor
Readable storage medium (including volatile and non-volatile memory and or memory element), at least one input unit, and extremely
A few output device.Wherein, memory is configured for storage program code；Processor is configured for according to the memory
Instruction in the said program code of middle storage executes method of the invention.
By way of example and not limitation, computer-readable medium includes computer storage media and communication media.It calculates
Machine readable medium includes computer storage media and communication media.Computer storage medium storage such as computer-readable instruction,
The information such as data structure, program module or other data.Communication media is generally modulated with carrier wave or other transmission mechanisms etc.
Data-signal processed passes to embody computer readable instructions, data structure, program module or other data including any information
Pass medium.Above any combination is also included within the scope of computer-readable medium.
As used in this, unless specifically stated, come using ordinal number " first ", " second ", " third " etc.
Description plain objects, which are merely representative of, is related to the different instances of similar object, and is not intended to imply that the object being described in this way must
Must have the time it is upper, spatially, sequence aspect or given sequence in any other manner.
Although the embodiment according to limited quantity describes the present invention, above description, the art are benefited from
It is interior it is clear for the skilled person that in the scope of the present invention thus described, it can be envisaged that other embodiments.Additionally, it should be noted that
Language used in this specification primarily to readable and introduction purpose and select, rather than in order to explain or limit
Determine subject of the present invention and selects.Therefore, without departing from the scope and spirit of the appended claims, for this
Many modifications and changes are obvious for the those of ordinary skill of technical field.For the scope of the present invention, to this
Invent done disclosure be it is illustrative and not restrictive, it is intended that the scope of the present invention be defined by the claims appended hereto.
Those skilled in the art can to the present invention be modified or modification design but do not depart from think of of the invention
Think and range.Therefore, if these modifications and changes of the present invention belongs to the claims in the present invention and its equivalent technical scope
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. meter and the load restoration ability estimation on line method of key sections limit constraint, which comprises the following steps:
1) the cutting load action message of the system protection based on acquisition, source net G system generates load aggregation L to be restored0If to
Restore load aggregation L0It is not sky, enters step 2), otherwise, exit load restoration ability estimation on line；
2) model parameter based on power grid and current operating status generate basic method of operation F0, based on basic method of operation F0、
Preassigned regulation measure, direct current restore plan, tie line plan and new energy predictive information and generate online regulation measure sky
Between C0；
3) based on basic method of operation F0Under load aggregation L to be restored0In trend sensitivity of each load to each key sections, meter
The restorability index of each load is calculated, considers that the restorability index of load priority and each load generates load sequence to be restored
Set L1；
4) based on basic method of operation F0Online regulation measure space C down0In each measure to the trend sensitivity of each key sections and
The measure response time calculates the performance of control index of each measure, considers that the performance of control index of measure priority and measure generates
Regulation measure Sorting space C1；
5) basic method of operation F is calculated based on frequency estimation0Generated energy P needed for frequency retrievalf, sorted according to load to be restored
Set L1In load total amount to be restored, regulation measure Sorting space C1In can with power generation total amount and frequency retrieval needed for generated energy
Pf, and consider that system losses and spinning reserve determine that load can restore total amount and matched regulation power generation total amount, to be restored negative
Lotus ordered set L1, regulation measure Sorting space C1It is middle that load can be restored into total amount and matched regulation power generation total amount by suitable respectively
Sequence is shared to each load to be restored and each regulation measure；
6) based on basic method of operation F0, load ordered set L to be restored1, regulation measure Sorting space C1It generates and envisions after restoring
Mode F1, Load flow calculation is carried out, and judge whether key sections are out-of-limit, and key sections are out-of-limit if it exists according to cross-section limitation, into
Enter step 7), otherwise enters step 8)；
7) based on anticipation mode F after restoring1Under load ordered set L to be restored1In restored load to the trend of each out-of-limit section
Sensitivity calculates the aid decision performance indicator of each load, comprehensively considers load priority and load aid decision performance indicator
To load ordered set L to be restored1Rearrangement；Based on anticipation mode F after recovery1Down regulation sequence for measures space C1In can use
Trend sensitivity of the measure to each out-of-limit section calculates the aid decision performance indicator of each regulation measure, considers measure priority
With measure aid decision performance indicator to regulation sequence for measures space C1Rearrangement；According to regulation measure Sorting space C1Weight
New sort successively selects ancillary measure and solves cross section limit, terminates if it can not solve, and is otherwise updated according to aid decision result
Load ordered set L to be restored1, regulation measure Sorting space C1In load can restore power and regulation measure control amount；
8) load ordered set L to be restored is counted1Middle recovery load total amount be load currently can recovery capability, regulation measure sequence
Space C1It is middle that measure is used to need the mating regulation measure taken, regulation measure Sorting space C for load restoration1In it is all using arranging
The maximum regulation time applied is currently can recovery capability be corresponding estimates time-consuming.
2. meter according to claim 1 and the load restoration ability estimation on line method of key sections limit constraint, special
Sign is,
Load aggregation L to be restored is generated in step 1)0, specifically includes the following steps:
There is N in power gridLA load to be restored,For i-th of load to be restored, then NLA load to be restored constitutes to be restored negative
Lotus set L0:
3. meter according to claim 1 and the load restoration ability estimation on line method of key sections limit constraint, special
Sign is,
Step 2) generates online regulation measure space C0, specifically includes the following steps:
There is N in power gridCA controllable measure, j-th of regulation measureCurrent power beMaximum power is
Measure available flag is(0 is no, and 1 is), then NCA regulation measure forms online regulation measure space C0:
The regulation measure type of regulation measure includes internal routine or the adjustment of new energy unit output, unit booting, interconnection meter
Draw adjustment and DC power modulation.
4. meter according to claim 1 and the load restoration ability estimation on line method of key sections limit constraint, special
Sign is,
The step 3) specifically includes the following steps:
3-1) based on basic method of operation F0Under load aggregation L to be restored0In each load to the trend sensitivity meters of each key sections
Calculate the restorability index of each load
Wherein,For the restorability index of i-th of load to be restored,For F0The nargin of lower k-th of section,
For F0The active power of lower k-th of section,For the stability limitation of k-th of section,For F0Lower i-th to be restored
Load to the active po wer sensitivity of k-th of key sections,WithFor F0The perturbation of lower i-th of load to be restored becomes
Change amount and k-th of section active power variable quantity, N because caused by perturbing load0,INTFor F0Lower section narginLess than specified
Threshold value ε0,INTKey sections number,WithRespectively F0Lower i-th of load to be restored is to the comprehensive of each key sections
Active po wer sensitivity and corresponding per unit value are closed,It indicatesIt takes absolute value；
3-2) according to each load priorityFrom small to large to load aggregation L to be restored0It is ranked up, obtains load to be restored
Preliminary ordered set L0'；Restorability index according to each loadFrom big to small to L0' in load priority is consistent arranges
It applies and carries out internal secondary sequence, obtain load ordered set L to be restored1:
Wherein,For load ordered set L to be restored1In i-th of load to be restored,WithRespectively set L1In i-th
The restorability index and load priority of a load to be restored, if it is in load aggregation L to be restored0In be ordered as i0, then
5. meter according to claim 1 and the load restoration ability estimation on line method of key sections limit constraint, special
Sign is, regulation measure Sorting space C is generated in the step 4)1, specifically includes the following steps:
4-1) based on basic method of operation F0Online regulation measure space C down0In trend sensitivity of each measure to each key sections
The performance of control index of each measure is calculated with the measure response time
Wherein,For the performance of control index of j-th of regulation measure,It is crucial disconnected to k-th for j-th of regulation measure
The active po wer sensitivity in face,WithRespectively F0The perturbation variable quantity and k-th of section of lower j-th of regulation measure
The active power variable quantity because of caused by the perturbation of measure power,For for F0The nargin of lower k-th of section,WithPoint
Not Wei j-th of regulation measure to the synthesis active po wer sensitivity and corresponding per unit value of each key sections,WithRespectively
The climbing rate of j-th regulation measure and corresponding per unit value,WithThe available delay of respectively j-th regulation measure
Time and corresponding per unit value,It indicatesIt takes absolute value,It indicatesIt takes absolute value；
4-2) according to each regulation measure priorityFrom small to large to C0It is ranked up, is regulated sequence for measures space C0'；
According to each regulation measure load restoration performance indicatorFrom big to small to C0' middle measure priority consistent measure progress inside
Second level sequence, is regulated sequence for measures space C1:
Wherein,For set C1In j-th of regulation measure,WithRespectively C1In
Load restoration performance indicator, measure priority, current power, maximum power and the measure available flag of j-th of regulation measure.
6. meter according to claim 1 and the load restoration ability estimation on line method of key sections limit constraint, special
Sign is,
The step 5) specifically includes the following steps:
5-1) basic method of operation F0Lower power grid current frequency is f0, rated frequency fr, then generated energy P needed for frequency retrievalf
Calculation method are as follows:
Wherein, PLFor basic method of operation F0Lower load is the sum of active, KLFor the active static frequency characteristic coefficient of load of power grid, KS
For the Network Loss Rate of power grid,WithRespectively C1In j-th of regulation measure current power, maximum power；
5-2) basic method of operation F0The lower current spare capacity of power grid is Pb,0, spare capacity requirement is Pb,r, by C1Sequence is successively led to
It crosses following formula and calculates the spare capacity surplus after j-th of regulation measure usesUntilOr it all calculates and completes:
Wherein,WithRespectively C1The spinning reserve machine group mark of k-th of regulation measure is arranged
Apply available flag, maximum power and current power；
If it existsThen enable the available regulation measure number N after considering spinning reserveC,b=j simultaneously all belongs to rotation for subsequent
The measure available flag for turning spare unit is set to 0, and modifies the maximum power of j-th of regulation measure；Otherwise N is enabledC,b=NC；
Load ordered set L to be restored 5-3) is calculated by formula (5-3-1)-(5-3-3)1In load total amount PL to be restored1,h, C1In
Power generation total amount PC can be used1,h, it is contemplated that load total amount PH can be restored1:
PH1=min (PL1,h,(PC1,h-Pf)×(1-KS)) (5-3-3)
Wherein,For load ordered set L to be restored1In i-th of load to be restored active power,WithRespectively C1In j-th of regulation measure measure available flag, current power and maximum power, KSFor the network loss of power grid
Rate, PfFor generated energy needed for frequency retrieval；
5-4) press load ordered set L to be restored1What sequence passed sequentially through that formula (5-4-1) calculate i-th load restores powerUntilOr it all calculates and completes:
If it existsSubsequent all loads to be restored then can be restored into powerIt is set to 0:
5-5) press C1Sequence passes sequentially through formula (5-5) and calculates the control amount that j-th of regulation measure matched load is restoredUntilOr it all calculates and completes:
If it existsThen by the control amount of subsequent regulation measureIt is set to 0:
7. meter according to claim 1 and the load restoration ability estimation on line method of key sections limit constraint, special
Sign is,
The step 7) specifically includes the following steps:
7-1) based on anticipation mode F after restoring1Under load ordered set L to be restored1In restored load to the tide of each out-of-limit section
Flow the aid decision performance indicator of each load of Calculation of SensitivityBased on anticipation mode F after recovery1Lower C1In can use measure
To the aid decision performance indicator of each regulation measure of trend Calculation of Sensitivity of each out-of-limit section
Wherein,To envision mode F after recovery1The nargin of lower k-th of section,To envision mode F after recovery1Lower kth
The active power of a section,For the stability limitation of k-th of section,For F0Lower i-th of load to be restored is to kth
The active po wer sensitivity of a key sections,For F1The perturbation variable quantity of lower i-th of load to be restored and k-th
Section active power variable quantity, N because caused by perturbing load1,INTTo envision mode F after recovery1Lower section narginLess than 0
Key sections number,WithRespectively F1Synthesis active po wer sensitivity of lower i-th of the load to be restored to each key sections
With corresponding per unit value,It is j-th of regulation measure to the active po wer sensitivity of k-th of key sections,With
Mode F is envisioned after respectively restoring1The perturbation variable quantity and k-th of section of lower j-th of regulation measure are due to measure power perturbs
Caused active power variable quantity,WithRespectively j-th of regulation measure is active to the synthesis of each key sections sensitive
Degree and corresponding per unit value,It indicatesIt takes absolute value,It indicatesIt takes absolute value；
7-2) according to each load priorityFrom big to small to L1It resequences, and according further to the auxiliary of each load
Decision performance indicatorFrom big to small to L1The middle consistent measure of load priority carries out internal secondary sequence；According to each tune
Control measure priorityFrom big to small to C1It resequences, and according further to the aid decision performance of each regulation measure
IndexFrom big to small to C1The middle consistent measure of measure priority carries out internal secondary sequence；
7-3) initialization control step-lengthWith control precision εstep；
7-4) enable the control step-length of the m times iterationAccording to L1And C1Ancillary measure picking rule is pressed in sequence
Successively selecting ancillary measure makes the control amount to beJudge whether cross section limit can solve based on sensitivity, if out-of-limit solution
Then enter 7-5)；If it is unresolved but still have measure it is available if enable m=m+1 enter 7-4)；Otherwise out-of-limit to eliminate, into 7-
5)；
If 7-5) out-of-limit solution, according to cross section limit aid decision measure, update load restores power, regulation measure
Control amount；It need not be updated if out-of-limit do not solve；
Wherein,For L1In i-th of load aid decision amount,For C1In j-th of regulation measure aid decision
Amount.
8. meter according to claim 7 and the load restoration ability estimation on line method of key sections limit constraint, special
Sign is,
Ancillary measure picking rule the following steps are included:
A) by active power after the matched control for sending receiving end control amount and each section of each step-length need of formula (7-4-1) calculating；
Wherein, Pr is that receiving end controls surplus, and Ps is that sending end controls surplus,For active power after the control of k-th of section,
KSFor the Network Loss Rate of power grid,For F1The active power of lower k-th of section,For the control step-length of the m times iteration, m
≥0；
B) sending end control considers regulation measure drop power output: pressing C1Positive sequence is successively handled, if measure available flagAndAnd Ps > 0, then:
Wherein, εsFor active po wer sensitivity threshold value,It is j-th of regulation measure to the active po wer sensitivity of k-th of key sections,For the aid decision amount of j-th of regulation measure,WithRespectively j-th regulation measure is worked as
The control amount that preceding power, minimum power and matched load are restored, the present embodiment εsTake 0.1；
C) regulation measure increasing power output is paid the utmost attention in receiving end control: by C1Inverted order is successively handled, if measure available flagAndAnd Pr > 0, then:
If d) receiving end regulation measure increases power output insufficient space, consider that receiving end has restored load and reduced amount of recovery: by L1Positive sequence is successively
It is handled, ifAndAnd Pr > 0, then:
If e) all sections all meetThen out-of-limit elimination, it is otherwise out-of-limit not eliminate.
9. meter according to claim 1 and the load restoration ability estimation on line method of key sections limit constraint, special
Sign is,
Step 8) the load currently can recovery capability be formula (8-1):
Currently can corresponding estimate time-consuming of recovery capability be formula (8-2):
Wherein, PL1,h,realFor L1Reality can restore load total amount i.e. load currently can recovery capability,For L1In i-th
Load restores power, T1For currently can recovery capability estimate time-consuming,WithRespectively
C1In j-th of regulation measure measure available flag, can with delay time, matched load restore control amount and climbing rate.
10. meter according to claim 1 and the load restoration ability estimation on line method of key sections limit constraint, special
Sign is,
Model parameter includes the static parameter of generator, load, exchange line segment, transformer, direct current line segment and capacitive reactance device.
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| CN108808738A (en) * | 2018-05-29 | 2018-11-13 | 国电南瑞科技股份有限公司 | A kind of power grid security Corrective control method considering constraint priority |
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