CN109066738A - A kind of interconnection consumption method for measuring and calculating and its system based on dynamic load balancing - Google Patents
A kind of interconnection consumption method for measuring and calculating and its system based on dynamic load balancing Download PDFInfo
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- CN109066738A CN109066738A CN201811141651.7A CN201811141651A CN109066738A CN 109066738 A CN109066738 A CN 109066738A CN 201811141651 A CN201811141651 A CN 201811141651A CN 109066738 A CN109066738 A CN 109066738A
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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
- H02J3/26—Arrangements for eliminating or reducing asymmetry in polyphase networks
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
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Abstract
The interconnection consumption method for measuring and calculating and its system, this method that the invention discloses a kind of based on dynamic load balancing include S1: based on network load balance building short-term dynamic balancing the load model；S2: the plan start-up mode of short-term dynamic balancing the load model and power grid local unit based on building calculates the upper limit value and lower limit value of extra-high voltage direct-current interconnection consumption planned value at each moment to be studied；S3: segmented mode based on the extra-high voltage direct-current tie line plan curve prestored the and upper limit value of extra-high voltage direct-current interconnection consumption planned value and lower limit value obtain the sectional curve of extra-high voltage direct-current interconnection consumption planned value at each moment to be studied.The method of the invention has measured extra-high voltage direct-current interconnection consumption planned value, so that the subsequent sectional curve by extra-high voltage direct-current interconnection consumption planned value is applied to scheduling institution, improves clean energy resource and dissolves ratio.
Description
Technical field
The invention belongs to dispatching of power netwoks fields, and in particular to a kind of interconnection consumption measurement calculation based on dynamic load balancing
Method and its system.
Background technique
With the unique advantage of interconnecting ties plan, electricity transaction realizes energy resources optimization in China and matches
It sets, the situation for efficiently solving disadvantage and den and depositing, and power grid increasingly closely contacts between major area and province and interconnection is defeated
It is promoted to electric energy power hardware, so that optimization of energy resources have more solid foundation.However, current grid structure and extreme misery
Electric resources status constrains the extensive consumption of clean energy resource, how to give full play to all kinds of regulating measures of power grid, sufficiently consumption with
It is equal to reduce power purchase for reducing power grid thermoelectricity ratio, Optimization of Energy Structure for extra-high voltage direct-current electric power based on clean energy resource power generation
Valence realizes energy-saving and emission-reduction, is of great significance and current urgent problem to be solved.Therefore, it obtains with clean energy resource power generation and is
The consumption amount of main extra-high voltage direct-current electric power is planned a few days ago to instruct scheduling institution to specify, excellent when carrying out Real-time Balancing calculating
First consider that extra-high voltage direct-current interconnection is the vital link that solves the above problems.However, having lacked one kind in the prior art
Reliably, in a manner of the consumption amount of extra-high voltage direct-current interconnection of the fast acquiring based on clean energy resource generates electricity.
Summary of the invention
The interconnection consumption method for measuring and calculating that the object of the present invention is to provide a kind of based on short-term dynamic balancing the load and its
System, realize it is reliable, fast acquiring with clean energy resource generate electricity based on extra-high voltage direct-current interconnection consumption amount, be scheduling institution
Scheduling data are provided, so that system maximum capacity consumption under the conditions of meeting safe and stable operation is extra-high based on clean energy resource
Press DC link.
On the one hand, the present invention provides a kind of interconnection consumption method for measuring and calculating based on short-term dynamic balancing the load, including
Following steps:
S1: based on network load balance building short-term dynamic balancing the load model；
Dt=GL,t+Gr,t+Lh,t+Lother,t
In formula, DtIndicate load value of the power grid in t moment, GL,tIndicate power generating value of the power grid local unit in t moment, Gr,t
Indicate power generating value of the power grid clean energy resource in t moment, Lh,tIndicate extra-high voltage direct-current interconnection t moment tie line plan value,
Lother,tSummation of other interconnections of expression in addition to extra-high voltage direct-current interconnection in the tie line plan value of t moment；
S2: the plan start-up mode of short-term dynamic balancing the load model and power grid local unit based on building calculates
The upper limit value and lower limit value of extra-high voltage direct-current interconnection consumption planned value at each moment to be studied；
S3: the segmented mode based on the extra-high voltage direct-current tie line plan curve prestored and spy at each moment to be studied
The upper limit value and lower limit value of high voltage direct current interconnection consumption planned value obtain the segmentation of extra-high voltage direct-current interconnection consumption planned value
Curve；
Wherein, the piecewise interval on the sectional curve of extra-high voltage direct-current interconnection consumption planned value and extra-high voltage direct-current are got in touch with
The piecewise interval of line Plan Curve corresponds, and extra-high voltage direct-current interconnection dissolves each segment identifier in the sectional curve of planned value
There are one group of consumption planned value maximum value and minimum value, calculation formula are as follows for interior correspondence:
In formula,WithL(Ti) it is illustrated respectively in period TiThe maximum of interior extra-high voltage direct-current interconnection consumption planned value
Value and minimum value,WithThe upper limit value for dissolving planned value at t moment on extra-high voltage direct-current interconnection is illustrated respectively in under
Limit value, Ti、TnI-th of piecewise interval in extra-high voltage direct-current tie line plan curve is respectively indicated, n-th of piecewise interval is corresponding
Period, n are the piecewise interval number of extra-high voltage direct-current tie line plan curve.
It should be appreciated that extra-high voltage direct-current interconnection in this field is mainly based on clean energy resource.The method of the invention exists
When considering the digestion capability of extra-high voltage direct-current interconnection, comprehensive analysis load, local system water transfer fire generated output, clean energy resource with
And other interconnections and then short-term dynamic balancing the load model is constructed, not only allow for province's inner equilibrium, it is also contemplated that transprovincially
Power balance carries out the calculating of the consumption amount of extra-high voltage direct-current interconnection under based on short-term dynamic balancing the load model, so that
System maximum capacity under the conditions of meeting safe and stable operation dissolves the extra-high voltage interconnection based on clean energy resource.Therefore, originally
The sectional curve for inventing obtained extra-high voltage direct-current interconnection consumption planned value can be applied to can be used as scheduling institution formulation day
Preceding plan makes it pay the utmost attention to extra-high voltage direct-current interconnection when carrying out Real-time Balancing calculating.
The formula from above-mentioned S3 is it is found that in period TiThe maximum value of interior extra-high voltage direct-current interconnection consumption planned value
For in period TiMinimum value in the interior planned value maximum value of place's consumption constantly that requires study；In period TiInterior extra-high straightening
Flow the minimum value of interconnection consumption planned valueL(Ti) it is in period TiThe interior planned value minimum value of place's consumption constantly that requires study
In maximum value.
Preferably, extra-high voltage direct-current interconnection dissolves the upper limit value of planned value under at each moment to be studied in step S2
The calculation formula of limit value is as follows:
In formula,WithIt is illustrated respectively in the upper limit value and lower limit of the sum of had interconnection consumption planned value at t moment
Value, wherein the upper limit value of the sum of had interconnection consumption planned value at t momentAnd lower limit valueCalculation formula such as
Under:
In formula, DtThe predicted load of ' expression t moment, Gr′,tIndicate the prediction power generating value of t moment clean energy resource,Power grid local unit is respectively indicated in the power output upper limit of t moment and power output lower limit.
Preferably, the power output upper limit of the power grid local unit in t momentIt is the 100% of booting capacity, power grid local
Power output lower limit of the group in t momentIt is the 50% of booting capacity.
Preferably, the moment to be studied chosen in S2 is using 15min as gap periods at the time of point.
The moment to be studied is essentially 96 points, i.e., it is daily in 15 minutes for a time point.
On the other hand, the present invention also provides a kind of calculating systems based on the above method, including balance model to construct module
And processing module；
Wherein, balance model constructs module, for based on network load balance building short-term dynamic balancing the load model；
Processing module, for calculate the consumption planned value of extra-high voltage direct-current interconnection at each moment to be studied upper limit value and
Lower limit value；
Processing module, for calculating the maximum value and minimum of each piecewise interval extra-high voltage direct-current interconnection consumption planned value
Value, and then obtain the sectional curve of extra-high voltage direct-current interconnection consumption planned value.
Beneficial effect
1, the present invention provides a kind of measuring method of completely new consumption amount for obtaining extra-high voltage direct-current interconnection, which is logical
Building short-term dynamic balancing the load model is crossed to calculate extra-high voltage direct-current interconnection consumption planned value at each moment to be studied
Upper limit value and lower limit value, then the conventional stage mode of foundation extra-high voltage direct-current tie line plan curve obtain extra-high voltage direct-current contact
Line dissolves the sectional curve of planned value, calculates simply, acquisition modes are convenient.
2, the method for the invention is when considering the digestion capability of extra-high voltage direct-current interconnection, comprehensive analysis load, local
System water transfer fire generated output, clean energy resource and other interconnections construct short-term dynamic balancing the load model in turn, not only
Consider province's inner equilibrium, it is also contemplated that power balance transprovincially carries out extra-high straightening under based on short-term dynamic balancing the load model
Flow the consumption amount of interconnection be calculated reliable consumption amount of plan as a result, system is made to meet safe and stable operation item
Maximum capacity dissolves the extra-high voltage interconnection based on clean energy resource under part, and the sectional curve of obtained consumption planned value is by local
Scheduling executes, to help to improve safe operation of electric network stability.
Detailed description of the invention
Fig. 1 is a kind of flow chart of the measuring method of completely new consumption amount for obtaining extra-high voltage direct-current interconnection of the invention.
Specific embodiment
Below in conjunction with embodiment, the present invention is described further.
As shown in Figure 1, a kind of interconnection based on short-term dynamic balancing the load provided by the invention dissolves method for measuring and calculating,
Include the following steps:
S1: based on network load balance building short-term dynamic balancing the load model.Wherein, using network load balance as base
Plinth, short-term dynamic balancing the load model need to meet such as following formula:
Dt=GL,t+Gr,t+Lh,t+Lother,t
In formula, DtIndicate load value of the power grid in t moment, GL,tIndicate power generating value of the power grid local unit in t moment, Gr,t
Indicate power generating value of the power grid clean energy resource in t moment, Lh,tIndicate extra-high voltage direct-current interconnection t moment tie line plan value,
Lother,tSummation of other interconnections of expression in addition to extra-high voltage direct-current interconnection in the tie line plan value of t moment.
S2: the plan start-up mode of short-term dynamic balancing the load model and power grid local unit based on building calculates
The upper limit value and lower limit value of planned value are dissolved on extra-high voltage direct-current interconnection at each 96 point.
Firstly, obtaining power output lower limit of the local unit at 96 points according to the unit start-up mode plan of power grid localWith
The power output upper limitIn the present embodiment, set that other tie line plans are constant and local startup-shutdown mode is constant therefore each
The power output lower limit at momentIt is the 50% of booting capacity, the upper limit of contributingIt is the 100% of booting capacity.
According to the short-term dynamic balancing the load model in step S1, the consumption planned value of all interconnections of t moment is obtained
The sum of calculation formula it is as follows:
Lall,t=Dt′-(GL,t+Gr′,t)
In formula, Lall,tIndicate the sum of had interconnection consumption planned value, D at t momenttThe load prediction of ' expression t moment
Value, Gr′,tIndicate the prediction power generating value of t moment clean energy resource.Therefore by the power output lower limit at 96 pointsWith the power output upper limit
The upper limit value and lower limit value of the sum of the consumption planned value of all interconnections at 96 points can be calculated by substituting into the formula, as follows
It is shown:
In formula,WithIt is illustrated respectively in the upper limit value and lower limit of the sum of had interconnection consumption planned value at t moment
Value.So the upper limit value and the lower limit value that dissolve planned value on extra-high voltage direct-current interconnection at each 96 point are as follows:
In formula,WithIt is illustrated respectively at t moment and dissolves plan (at each 96 point) on extra-high voltage direct-current interconnection
The upper limit value and lower limit value of value.By dissolving planned value upper limit value at available 96 point of extra-high voltage direct-current interconnection of above-mentioned calculating
The maximum curve of composition, lower limit valueThe minimum curve of composition.
S3: the segmented mode based on the extra-high voltage direct-current tie line plan curve prestored and spy at each moment to be studied
The upper limit value and lower limit value of high voltage direct current interconnection consumption planned value obtain the segmentation of extra-high voltage direct-current interconnection consumption planned value
Curve.
The curve type of extra-high voltage direct-current tie line plan curve is usually step type, therefore special within one section of period
High voltage direct current interconnection dissolves the curve of planned value by a plurality of rectilinear(-al).By being carried out to 96 points of consumption planned values of each period
Processing, it is assumed that extra-high voltage direct-current tie line plan value curve is made of n ladder, therefore curve can be divided into n sections, Ti∈
{T1,T2,…Tn}.Within each period, the sectional curve of extra-high voltage direct-current interconnection consumption planned value is expressed as follows:
In formula,WithL(Ti) it is illustrated respectively in period TiThe maximum of interior extra-high voltage direct-current interconnection consumption planned value
Value and minimum value.From above-mentioned formula it is found that in period TiThe maximum value of interior extra-high voltage direct-current interconnection consumption planned value
For in period TiMinimum value in interior all 96 points of consumptions planned value maximum values；In period TiInterior extra-high voltage direct-current interconnection
Dissolve the minimum value of planned valueL(Ti) it is in period TiMaximum value in interior all 96 points of consumptions planned value minimum values.
On the other hand, the present invention also provides the calculating system based on the method, including balance model building module and
Processing module；
Wherein, balance model constructs module, for based on network load balance building short-term dynamic balancing the load model；
Processing module, for calculate the consumption planned value of extra-high voltage direct-current interconnection at each moment to be studied upper limit value and
Lower limit value；
Processing module, for calculating the maximum value and minimum of each piecewise interval extra-high voltage direct-current interconnection consumption planned value
Value, and then obtain the sectional curve of extra-high voltage direct-current interconnection consumption planned value.
Wherein, above-mentioned module is divided into division of functionality, and in some embodiments, part of module can merge or tear open
Solution, the present invention is to this without specifically limiting.
The method of the invention is when considering the digestion capability of extra-high voltage direct-current interconnection, comprehensive analysis load, local system
Water transfer fire generated output, clean energy resource and other interconnections construct short-term dynamic balancing the load model in turn, not only examine
Province's inner equilibrium is considered, it is also contemplated that power balance transprovincially carries out extra-high voltage direct-current under based on short-term dynamic balancing the load model
The calculating of the consumption amount of interconnection, so that system maximum capacity under the conditions of meeting safe and stable operation dissolves with clean energy resource and is
Main extra-high voltage interconnection.
It is emphasized that example of the present invention be it is illustrative, without being restrictive, thus the present invention it is unlimited
Example described in specific embodiment, other all obtained according to the technique and scheme of the present invention by those skilled in the art
Embodiment does not depart from present inventive concept and range, and whether modification or replacement, also belong to protection model of the invention
It encloses.
Claims (5)
1. a kind of interconnection based on dynamic load balancing dissolves method for measuring and calculating, it is characterised in that；Include the following steps:
S1: based on network load balance building short-term dynamic balancing the load model；
Dt=GL,t+Gr,t+Lh,t+Lother,t
In formula, DtIndicate load value of the power grid in t moment, GL,tIndicate power generating value of the power grid local unit in t moment, Gr,tIt indicates
Power generating value of the power grid clean energy resource in t moment, Lh,tIndicate extra-high voltage direct-current interconnection t moment tie line plan value,
Lother,tSummation of other interconnections of expression in addition to extra-high voltage direct-current interconnection in the tie line plan value of t moment；
S2: the plan start-up mode of short-term dynamic balancing the load model and power grid local unit based on building calculates each
The upper limit value and lower limit value of extra-high voltage direct-current interconnection consumption planned value at moment to be studied；
S3: the segmented mode based on the extra-high voltage direct-current tie line plan curve prestored and extra-high voltage at each moment to be studied
The upper limit value and lower limit value of DC link consumption planned value obtain the sectional curve of extra-high voltage direct-current interconnection consumption planned value；
Wherein, the piecewise interval and extra-high voltage direct-current interconnection meter on the sectional curve of extra-high voltage direct-current interconnection consumption planned value
The piecewise interval of tracing corresponds, and extra-high voltage direct-current interconnection dissolves in the sectional curve of planned value in each piecewise interval
It is corresponding that there are one group of consumption planned value maximum value and minimum value, calculation formula are as follows:
In formula,WithL(Ti) it is illustrated respectively in period TiThe maximum value of interior extra-high voltage direct-current interconnection consumption planned value with most
Small value,WithIt is illustrated respectively in the upper limit value and lower limit value for dissolving planned value at t moment on extra-high voltage direct-current interconnection,
Ti、TnRespectively indicate i-th of piecewise interval in extra-high voltage direct-current tie line plan curve, n-th of piecewise interval corresponding time
Section, n are the piecewise interval number of extra-high voltage direct-current tie line plan curve.
2. according to the method described in claim 1, it is characterized by: extra-high voltage direct-current joins at each moment to be studied in step S2
The upper limit value of winding thread consumption planned value and the calculation formula of lower limit value are as follows:
In formula,WithIt is illustrated respectively in the upper limit value and lower limit value of the sum of had interconnection consumption planned value at t moment,
Wherein, at t moment the sum of had interconnection consumption planned value upper limit valueAnd lower limit valueCalculation formula it is as follows:
In formula, D 'tIndicate the predicted load of t moment, G 'r,tIndicate the prediction power generating value of t moment clean energy resource,
Power grid local unit is respectively indicated in the power output upper limit of t moment and power output lower limit.
3. according to the method described in claim 2, it is characterized by: power grid local unit t moment the power output upper limitTo open
The 100% of machine capacity, power output lower limit of the power grid local unit in t momentIt is the 50% of booting capacity.
4. according to the method described in claim 1, it is characterized by: the moment to be studied chosen in S2 is using 15min as interval
Point at the time of period.
5. a kind of calculating system based on any one of claim 1-4 the method, it is characterised in that: constructed including balance model
Module and processing module；
Wherein, balance model constructs module, for based on network load balance building short-term dynamic balancing the load model；
Processing module, for calculating the upper limit value and lower limit of extra-high voltage direct-current interconnection consumption planned value at each moment to be studied
Value；
Processing module, for calculating the maxima and minima of each piecewise interval extra-high voltage direct-current interconnection consumption planned value,
And then obtain the sectional curve of extra-high voltage direct-current interconnection consumption planned value.
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| CN102075014A (en) * | 2011-01-06 | 2011-05-25 | 清华大学 | Large grid real-time scheduling method for accepting access of wind power |
| CN104578183A (en) * | 2015-01-28 | 2015-04-29 | 国家电网公司 | Tie-line power transmission plan optimization method for improving low-carbon level of electric system |
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