CN106651654A - Transmission electric quantity calculation and partition electric quantity regulation method in generation scheduling safety checking - Google Patents
Transmission electric quantity calculation and partition electric quantity regulation method in generation scheduling safety checking Download PDFInfo
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Abstract
The present invention discloses a transmission electric quantity calculation and partition electric quantity regulation method in generation scheduling safety checking. The method concretely comprises the following steps: the step S1, performing division of safe areas of the power grid according to the current actual situation of the power grid; the step S2, collecting basic data, and obtaining the scheduled electric quantity of the safe areas, the interaction electric quantity of the safe areas and the related areas and the prediction electric quantity data of the safe areas to establish a firm basis for the subsequent checking and correction; the step S3, according to the actual situation, setting the limiting value of each tie line; the step S4, calculating the transmission electric quantity of each tie line, combining the basic data and the power grid network topology, and calculating the transmission electric quantity of the tie line; the step S5, performing check analysis, and determining whether the calculated transmission electric quantity of each tie line exceeds the limiting value or not; the step S6, performing partition electric quantity regulation, and regulating the generation scheduling of each safe area set according to the checking result; and the step S7, stopping the safe checking process, and obtaining the transmission electric quantity calculation of each tie line and the generation scheduling regulation result of each safe area set. In the step S5, if the transmission electric quantity of each tie line exceeds the limiting value condition, the step S6 is performed, or else, the step S7 is performed. The transmission electric quantity calculation and partition electric quantity regulation method in generation scheduling safety checking can eliminate the hidden dangers and improve the operation level of the power grid.
Description
Technical field
The invention belongs to electrical network Medium and long term generation scheduling Security Checking field, more particularly to a kind of Medium and long term generation scheduling peace
Transmit electricity in whole school's core to calculate and subregion electricity method of adjustment.
Background technology
Electricity market is a brand-new operating mechanism, and in electricity market operation structure, dispatching of power netwoks operation will be based on
Market transaction result, market transaction pursues greatest benefit economically becomes the factor of override consideration, and limits system operation
In the often safety factorss of most economical state.The interconnection of simultaneous system, power system behavior becomes to become increasingly complex,
Operating point becomes closer to safety and stability border, for the angle arranged from operation and mode, all to the safe school of power system
The nuclear issue proposes an urgent demand.Medium and long term generation scheduling Security Checking major function be check and adjust in the long-term meter that generates electricity
Draw, be allowed to meet interregional security constraints.And during the transmission electricity of interconnection race is calculated and subregion electricity method of adjustment is
The important component part of long-term generation schedule Security Checking, its main task is to calculate power grid security interval interconnection transmission electricity
Amount, for occur interconnection it is out-of-limit in the case of, then adjust unit generation schedule, be allowed to meet interregional security constraints.
Therefore, in generation schedule compilation process, Security Checking is carried out as early as possible and targetedly strategy is formulated, be conducive to finding electricity as early as possible
The weak link of network operation, and control device is taken in time, to eliminate safe hidden trouble, improve operation of power networks level.At present, it is domestic
Outer research concentrates on the Security Checking of daily trading planning, compared with daily trading planning, span when Medium and long term generation scheduling has
The characteristics of degree is big, uncertainty is strong.From the point of view of the data delivered, electricity is transmitted in Medium and long term generation scheduling Security Checking and is calculated
Less with the research in terms of subregion electricity adjustment, a few regions such as Northeast Regional, Anhui, Shandong or province carry out preliminary grinding
Study carefully, such as in document《The partition security of Northeast Regional Power Market moon electricity plan is checked》(electric power network technique 2004 year volume 28 the 10th
Phase page 20) in propose partition security check method, highlighted partition security and checked basic model, and propose interconnection
The computing formula of subregion electricity adjustment amount under the conditions of out-of-limit.The interconnection transmission electricity that above-mentioned document is illustrated is calculated and can only be used to base
This theory analysis, in the electrical network for exist interconnecting relation and does not apply to, thus can not put into practical application, meanwhile, this article is simultaneously
Practical plans electricity method of adjustment is not proposed, the machine of bidding that the subregion electricity adjustment amount obtained can not be segmented to place of safety
Group, thus do not prove effective in actual applications.Document《Northeast Regional market medium and long-term transaction Security Checking improved method》(electric power
System automation 2007 year the 8th phase page 96 of volume 31) in propose interconnection transmission electricity it is out-of-limit under the conditions of security partitioning electricity
Method of adjustment, using double optimization optimal generation scheme, but its method for not referring to check analysis are solved, i.e., can not constitute one
Individual complete Security Checking system.Patent《The Security Checking method of long-term electricity plan in a kind of》(application number：
Transmission electricity computational methods in check analysis are highlighted in 201310407545.X), using weighted Markov chain model
Interconnection to calculate the plan phase transmits electricity limit value, but it does not refer to the process of calculation and check, and does not account for presence and get over
The method of the adjustment of generation schedule during limit situation.
The content of the invention
In view of the above problems, it is an object of the invention to provide one kind eliminates safe hidden trouble, operation of power networks level is improved
Generate electricity and the method for adjustment of electricity calculating and subregion electricity is transmitted in checking.
For achieving the above object, electricity calculating is transmitted in the generation schedule Security Checking that the present invention is provided and subregion electricity is adjusted
Adjusting method, it is specific as follows：
Step S1, according to local electrical network practical situation, to the electrical network safe Division is carried out；
Step S2, gathers basic data, obtains place of safety plan electricity, place of safety and electricity and safety are interacted with relative region
Area predicts electric quantity data, is that check below establishes solid foundation with correction；
Step S3, according to practical situation, sets the limit value of each interconnection；
Step S4, interconnection transmission electricity is calculated, and with reference to basic data and electricity grid network topology, to interconnection electricity is transmitted
Calculated；
Whether step S5, check analysis judges each interconnection transmission electricity for being calculated beyond its limit value；
Step S6, subregion electricity adjustment, is adjusted according to check result to the generation schedule of each place of safety unit；
Step S7, Security Checking process terminates, and obtains interconnection transmission electricity result of calculation and each place of safety unit generation
Plan rescheduling result.
If each interconnection transmission electricity is above its limit value situation in above-mentioned steps S5, then step S6 is carried out；Otherwise, enter
Row step S7；
The specific as follows of interconnection transmission electricity is calculated in above-mentioned steps S4：
Step S401, carries out statistics and forms initiation sequence to the interconnection race number of all places of safety, is designated as Li(i=1,
2 ..., n), n are place of safety number.Setting initial cycle number of times j=s；
Step S402, to sequence L ascending sort is carried out, according to sorted order, to sequence after new sequence Li(i=
1,2 ..., n) correspondence place of safety m ∈ (1,2 ..., n) carry out calculation and check；
Step S403, to place of safety m ∈ (1,2 ..., interconnection race n) traveled through, count and checked in data base
There is not the interconnection race number of result of calculation in phase, be designated as a, judge whether a is 1, if it is not, then first according to practical situation by user
The transmission electricity accounting of each circuit is set, the transmission electricity summation of this interconnection race is calculated, is accounted for according to set before
Than, the transmission electricity of this interconnection race is tried to achieve, then each interconnection is decomposed to according to set ratio, and stored,
It is place of safety m interconnection transmission electricity to concurrently set other places of safety being connected with place of safety m corresponding interconnection transmission electricity
Negative value；
Step S404, excludes the place of safety m for just calculating, and will have the place of safety interconnection race number being connected to subtract 1 with m, constitutes
New sequence L, and make j=j-1；
Step S405, judges j=0If then going to step S406, otherwise, step S402 is gone to；
Step S406, exports calculation and check result.
In some embodiments, the concrete grammar of calculation and check is in step S402：
In above formulaInterconnection for place of safety m transmits electricity summation, NgFor the unit number that place of safety m participates in generating electricity, Nb
It is that place of safety m has passed through the contact line number for calculating, NlFor place of safety m power load numbers, NjIt is have interconnection to be connected with place of safety m
Other regional numbers,For the generated energy of g-th unit of place of safety m,Through in the interconnection for calculating for place of safety m
The b article of transmission electricity,For the power consumption of l-th load of place of safety m,For place of safety m with and it there is annexation
Transmission electricity between j-th other area.In addition,WithWith place of safety m as reference, the direction that electricity flows out is set
Direction for positive direction, and electricity inflow is negative direction.
In some embodiments, subregion electricity method of adjustment is as follows in step S6：
Step S601, according to power grid topological graph incidence matrix B is tried to achieveGWith BL, wherein BGRepresent generating set and security partitioning
Between incidence matrix, BGOne place of safety of correspondence per a line, one unit of correspondence per string, when unit is under the jurisdiction of place of safety
When, corresponding element is 1, is otherwise 0；BLThe incidence matrix between interconnection and security partitioning is represented, the correspondence one per a line
Place of safety, one interconnection of correspondence per string, when interconnection and place of safety have annexation, and electricity flow direction points to safety
Area, corresponding element is 1, is otherwise -1.
Step S602, tries to achieve maximum and disclosure satisfy that place of safety is bidded the electricity vector W of demand using linear programmingd=[Wd1,
Wd2,L,Wdm]；
Step S603, judges that maximum meets place of safety and bids the electricity vector W of demanddWhether bid equal to place of safety is actual
The electricity vector W of demandD, step S605 is if so, skipped to, if it is not, skipping to step S604；
Step S604, by WdIt is assigned to WD；
Step S605, using each place of safety optimum competing generators acceptance of the bid electricity of linear programming for solution and interconnection transmission electricity
Amount.
In some embodiments, maximum meets place of safety and bids the electricity vector W of demand in step S602dMethod for solving
For：
s.t BGWG+BLWL-Wd=0
WGmin≤WG≤WGmax
WLmin≤WL≤WLmax
0≤Wd≤WD
In formula, WG=[WG1,WG2,,WGl]T, WGi(i=1,2, L, l) be i-th competing generators plan electricity, l is for competing
The number of valency unit；WL=[WL1,WL2,,WLn]T, WLj(j=1,2, L, are n) the transmission electricity of j-th strip interconnection, and n is contact
The bar number of line.
In some embodiments, each place of safety optimum competing generators acceptance of the bid electricity and interconnection transmission electricity in step S605
Measuring method for solving is：
s.t BGWG+BLWL-WD=0
WGmin≤WG≤WGmax
WLmin≤WL≤WLmax
In formula, Pi(i=1,2, L, l) be i-th unit electricity price, its dependent variable described above.
In some embodiments, in step S1, the electromotor quantity of the quantity of place of safety and each security partitioning and it is
System load should be maintained in rational scope, meanwhile, power grid security Division should meet following principle：
(1) according to electrical network power supply area and load character, rationalization partition, several supply and demand sub-district in a basic balance is formed
Domain, and Jing interconnections are connected with adjacent area, keep standby each other between adjacent area；
(2) safety analysiss to different electrical networks should be differentiated, and need not require that there is same safety in all regions
Level, should take different analysis methods or evaluation criteria according to the practical situation in each region.
In some embodiments, in step S3 set interconnection limit value should consider interconnection history run state,
The factors such as the safe zone state for being connected.
In some embodiments, check analysis should one by one judge each interconnection transmission that calculation and check is obtained in step S5
Whether electricity exceedes its limit value, and if so, then needing to skip to S6 carries out subregion electricity adjustment, if it is not, then skipping to step S7.
The invention has the beneficial effects as follows have eliminating safe hidden trouble, operation of power networks level is improved
A complete Security Checking system is built, check analysis method therein can be to complex interconnection electricity
Net is calculated, and so as to obtain interconnection transmission electricity between safety, transmits the out-of-limit situation of electricity if there is interconnection race, then
Unit generation plan in place of safety is adjusted, under conditions of safety is ensured maximizing the benefits is reached.The method can be examined
Test and adjust Medium and long term generation scheduling so as to disclosure satisfy that interregional security constraints, be conducive to finding operation of power networks as early as possible
Weak link, and take control device in time, to eliminate place of safety hidden danger, improve operation of power networks level.
Description of the drawings
Fig. 1 is the flow chart of the present invention；
Fig. 2 is the structural representation of the middle transmission electricity basic calculating model of the present invention；
Fig. 3 is the regional power grid schematic diagram employed in the specific embodiment of the invention.
Specific embodiment
Invention is described in further detail below in conjunction with the accompanying drawings.
Embodiment 1
As shown in figure 1, calculating and subregion electricity method of adjustment tool to transmit electricity in generation schedule Security Checking of the present invention
The flow chart of body embodiment.Referring to Fig. 1, this specific embodiment provides transmission electricity in a kind of Medium and long term generation scheduling Security Checking
Amount is calculated and subregion electricity method of adjustment, and it primarily serves the purpose of the medium-term and long-term generating meter that inspection and adjustment region electrical network have made
Draw, the method includes the steps of：
Step S1, according to local electrical network practical situation, to the electrical network safe Division is carried out；
Step S2, gathers basic data, obtains place of safety plan electricity, place of safety and interacts electricity and safety with other areas
Area's prediction data such as electricity, are that check below establishes solid foundation with correction；
Step S3, according to practical situation, sets the limit value of each interconnection；
Step S4, interconnection transmission electricity is calculated, and with reference to basic data and electricity grid network topology, to interconnection electricity is transmitted
Calculated；
Step S5, check analysis judges whether each interconnection transmission electricity for being calculated exceeds its limit value, if there is
Out-of-limit situation, then carry out step S6, otherwise carries out step S7；
Step S6, subregion electricity adjustment, is adjusted according to check result to the generation schedule of each place of safety unit；
Step S7, Security Checking process terminates, and obtains interconnection transmission electricity result of calculation and each place of safety unit generation
Plan rescheduling result.
Wherein, described in step S1 power grid security Division as shown in figure 3, the present embodiment using somewhere electrical network framework and
Its basic data is used to analyze.In addition, the electromotor quantity and system loading of the quantity of place of safety and each security partitioning should be protected
Hold in rational scope, meanwhile, power grid security Division should meet following principle：
(1) according to electrical network power supply area and load character, rationalization partition, several supply and demand sub-district in a basic balance is formed
Domain, and Jing interconnections are connected with adjacent area, keep standby each other between adjacent area；
(2) safety analysiss to different electrical networks should be differentiated, and need not require that there is same safety in all regions
Level, should take different analysis methods or evaluation criteria according to the practical situation in each region..
In the present embodiment, the data that step S2 is gathered are the basic data in certain month of somewhere, specifically include safety
Area's plan electricity, place of safety interact the data such as electricity and place of safety prediction electricity with other areas.
In the present embodiment, interconnection limit value is set in step S3 should be considered interconnection history run state, be connected
The factor such as safe zone state.
In the present embodiment, step S4 includes：
Step S401, carries out statistics and forms initiation sequence to the interconnection race number of all places of safety, is designated as Li(i=1,
2 ..., n), n are place of safety number.Setting initial cycle number of times j=s；
Step S402, to sequence L ascending sort is carried out, according to sorted order, to sequence after new sequence Li(i=
1,2 ..., n) correspondence place of safety m ∈ (1,2 ..., n) carry out calculation and check；
Step S403, to place of safety m ∈ (1,2 ..., interconnection race n) traveled through, count and checked in data base
There is not the interconnection race number of result of calculation in phase, be designated as a, judge whether a is 1, if it is not, then first according to practical situation by user
The transmission electricity accounting of each circuit is set, the transmission electricity summation of this interconnection race is calculated, is accounted for according to set before
Than, the transmission electricity of this interconnection race is tried to achieve, then each interconnection is decomposed to according to set ratio, and stored,
It is place of safety m interconnection transmission electricity to concurrently set other places of safety being connected with place of safety m corresponding interconnection transmission electricity
Negative value；
Step S404, excludes the place of safety m for just calculating, and will have the place of safety interconnection race number being connected to subtract 1 with m, constitutes
New sequence L, and make j=j-1；
Step S405, judges j=0If then going to step S406, otherwise, step S402 is gone to；
Step S406, exports calculation and check result.
In the present embodiment, calculation and check basic model such as Fig. 2 in sub-step S402 of step S4, its circular
For：
In above formulaInterconnection for place of safety m transmits electricity summation, NgFor the unit number that place of safety m participates in generating electricity, Nb
It is that place of safety m has passed through the contact line number for calculating, NlFor place of safety m power load numbers, NjIt is have interconnection to be connected with place of safety m
Other regional numbers,For the generated energy of g-th unit of place of safety m,Through in the interconnection for calculating for place of safety m
The b article of transmission electricity,For the power consumption of l-th load of place of safety m,For place of safety m with and it there is annexation
Transmission electricity between j-th other area.In addition,WithWith place of safety m as reference, the direction that electricity flows out is set
Direction for positive direction, and electricity inflow is negative direction.
In the present embodiment, check analysis in step S5 should one by one judge that each interconnection transmission electricity that calculation and check is obtained is
It is no more than its limit value, if so, then needing to skip to S6 carries out subregion electricity adjustment, if it is not, then skipping to step S7.
In the present embodiment, step S6 includes：
Step S601, according to power grid topological graph incidence matrix B is tried to achieveGWith BL, wherein BGRepresent generating set and security partitioning
Between incidence matrix, BGOne place of safety of correspondence per a line, one unit of correspondence per string, when unit is under the jurisdiction of place of safety
When, corresponding element is 1, is otherwise 0；BLThe incidence matrix between interconnection and security partitioning is represented, the correspondence one per a line
Place of safety, one interconnection of correspondence per string, when interconnection and place of safety have annexation, and electricity flow direction points to safety
Area, corresponding element is 1, is otherwise -1；
Step S602, tries to achieve maximum and disclosure satisfy that place of safety is bidded the electricity vector W of demand using linear programmingd=[Wd1,
Wd2,L,Wdm]；
Step S603, judges that maximum meets place of safety and bids the electricity vector W of demanddWhether bid equal to place of safety is actual
The electricity vector W of demandD, step S605 is if so, skipped to, if it is not, skipping to step S604.
Step S604, by WdIt is assigned to WD；
Step S605, using each place of safety optimum competing generators acceptance of the bid electricity of linear programming for solution and interconnection transmission electricity
Amount.
In above-mentioned scheme, in sub-step S602 of the step S6 maximum meet place of safety bid demand electricity vector
WdMethod for solving is：
s.t BGWG+BLWL-Wd=0
WGmin≤WG≤WGmax
WLmin≤WL≤WLmax
0≤Wd≤WD
In formula, WG=[WG1,WG2,,WGl]T, WGi(i=1,2, L, l) be i-th competing generators plan electricity, l is for competing
The number of valency unit；WL=[WL1,WL2,,WLn]T, WLj(j=1,2, L, are n) the transmission electricity of j-th strip interconnection, and n is contact
The bar number of line.
In above-mentioned scheme, each place of safety optimum competing generators acceptance of the bid electricity and connection in sub-step S605 of step S6
Winding thread transmits electricity method for solving：
s.t BGWG+BLWL-WD=0
WGmin≤WG≤WGmax
WLmin≤WL≤WLmax
In formula, Pi(i=1,2, L, l) be i-th unit electricity price, its dependent variable described above, herein no longer
Repeat.
Illustrate below by way of example, the present invention is further elaborated.
Step S1, power grid security Division result is as shown in Figure 2；
Step S2, gathers basic data, in the present embodiment, using somewhere month place of safety plan electricity, place of safety
The data such as electricity and place of safety prediction electricity are interacted with other areas, it is as shown in the table：
The somewhere month place of safety basic data of table 1
Unit：MWh
The basic data of each place of safety inside power plant is as shown in table 2：
Power plant's basic data unit in the somewhere month place of safety of table 2：MWh, unit/MWh, unit
Continued
Note：Herein power plants generating electricity lower limit is set to 0
Step S3, with reference to this area's practical situation, can set each interconnection limit value of security interval as shown in the table：
Electricity limit value is transmitted in each interconnection race of the security interval of table 3
Unit：MWh
Step S4, it is as shown in the table by can be calculated check month interconnection transmission electricity：
The each interconnection race of the security interval of table 4 checks month transmission electricity limit value
Unit：MWh
Step S5, by comparing month actual transmissions electricity and month transmission electricity limit value are checked, and can obtain checking knot
Fruit as shown in table 4, is not difficult to find out, interconnection there are problems that out-of-limit, then skip to step S6；
Step S6, utilizes proposed electricity method of adjustment to be adjusted generation schedule, obtains result such as table 5,6 and table
Shown in 7；
The somewhere month place of safety maximum bid demand of table 5
Unit：MWh
The somewhere month place of safety electricity adjustment result unit of table 6：MWh, unit/MWh, unit
Continued
The somewhere month place of safety electricity adjustment result of table 7
Unit：MWh
Step S7, Security Checking process terminates, and obtains interconnection transmission electricity result of calculation and each place of safety unit generation
Plan rescheduling result is as shown in table 6,7.
Can be seen by above-mentioned simulation example, this simulation example result is feasible, can not only efficiently solve connection
The out-of-limit problem of winding thread, additionally it is possible to greatly reduce the purchases strategies of grid company, realize Medium and long term generation scheduling and power purchase into
This coordination optimization, improves the scientific and effectiveness of decision-making, has reached the beneficial effect of the invention.
Above-described is only some embodiments of the present invention.For the person of ordinary skill of the art, not
On the premise of departing from the invention design, some deformations and improvement can also be made, these belong to the protection domain of invention.
Claims (8)
1. electricity is transmitted in generation schedule Security Checking to calculate and subregion electricity method of adjustment, it is specific as follows：
Step S1, according to local electrical network practical situation, to the electrical network safe Division is carried out；
Step S2, gathers basic data, and electricity is planned in acquisition place of safety, electricity is interacted with relative region for place of safety and place of safety is pre-
Electric quantity data is surveyed, is that check below establishes solid foundation with correction；
Step S3, according to practical situation, sets the limit value of each interconnection；
Step S4, interconnection transmission electricity is calculated, and with reference to basic data and electricity grid network topology, interconnection transmission electricity is carried out
Calculate；
Whether step S5, check analysis judges each interconnection transmission electricity for being calculated beyond its limit value；
Step S6, subregion electricity adjustment, is adjusted according to check result to the generation schedule of each place of safety unit；
Step S7, Security Checking process terminates, and obtains interconnection transmission electricity result of calculation and each place of safety unit generation plan
Adjustment result.
If each interconnection transmission electricity is above its limit value situation in above-mentioned steps S5, then step S6 is carried out；Otherwise, walked
Rapid S7；
The specific as follows of interconnection transmission electricity is calculated in above-mentioned steps S4：
Step S401, carries out statistics and forms initiation sequence to the interconnection race number of all places of safety, is designated as Li(i=1,2, n), n is
Place of safety number.Setting initial cycle number of times j=s；
Step S402, to sequence L ascending sort is carried out, according to sorted order, to sequence after new sequence Li(i=1,2, n)
Correspondence place of safety m ∈ (1,2, n) carry out calculation and check；
Step S403, to place of safety m ∈, (1,2, interconnection race n) is traveled through, and statistics does not have in data base in the check phase
The interconnection race number of result of calculation, is designated as a, judges whether a is 1, if it is not, then first arranging each line by user according to practical situation
The transmission electricity accounting on road, calculates the transmission electricity summation of this interconnection race, according to accounting set before, tries to achieve this
The transmission electricity of individual interconnection race, then decomposes to each interconnection according to set ratio, and is stored, concurrently set with
Other place of safety correspondence interconnection transmission electricity that place of safety m is connected are place of safety m interconnection transmission electricity negative values；
Step S404, excludes the place of safety m for just calculating, and will have the place of safety interconnection race number being connected to subtract 1 with m, constitutes new
Sequence L, and make j=j-1；
Step S405, judges j=0, if then going to step S406, otherwise, goes to step S402；
Step S406, exports calculation and check result.
2. electricity is transmitted in generation schedule Security Checking according to claim 1 to calculate and subregion electricity method of adjustment, its
It is characterised by, the concrete grammar of calculation and check is in step S402：
In above formulaInterconnection for place of safety m transmits electricity summation, NgFor the unit number that place of safety m participates in generating electricity, NbFor peace
Whole district m is through the contact line number for calculating, NlFor place of safety m power load numbers, NjIt is its that have that interconnection is connected with place of safety m
His regional number,For the generated energy of g-th unit of place of safety m,B in the interconnection for calculating through for place of safety m
The transmission electricity of bar, Wl mFor the power consumption of l-th load of place of safety m,For place of safety m with and it there is the jth of annexation
Transmission electricity between individual other areas.In addition,WithWith place of safety m as reference, set electricity outflow direction as
Positive direction, and the direction that electricity is flowed into is negative direction.
3. electricity is transmitted in generation schedule Security Checking according to claim 2 to calculate and subregion electricity method of adjustment, its
It is characterised by, subregion electricity method of adjustment is as follows in described step S6：
Step S601, according to power grid topological graph incidence matrix B is tried to achieveGWith BL, wherein BGRepresent between generating set and security partitioning
Incidence matrix, BGOne place of safety of correspondence per a line, per string, one unit of correspondence, right when unit is under the jurisdiction of place of safety
The element answered is 1, is otherwise 0；BLThe incidence matrix between interconnection and security partitioning is represented, one safety of correspondence per a line
Area, one interconnection of correspondence per string, when interconnection and place of safety have annexation, and electricity flow direction points to place of safety, right
Answer element to be 1, be otherwise -1.
Step S602, tries to achieve maximum and disclosure satisfy that place of safety is bidded the electricity vector W of demand using linear programmingd=[Wd1,Wd2,
L,Wdm]；
Step S603, judges that maximum meets place of safety and bids the electricity vector W of demanddWhether the actual demand of bidding in place of safety is equal to
Electricity vector WD, step S605 is if so, skipped to, if it is not, skipping to step S604；
Step S604, by WdIt is assigned to WD；
Step S605, using each place of safety optimum competing generators acceptance of the bid electricity of linear programming for solution and interconnection transmission electricity.
4. electricity is transmitted in generation schedule Security Checking according to claim 3 to calculate and subregion electricity method of adjustment, its
It is characterised by, maximum meets place of safety and bids the electricity vector W of demand in described step S602dMethod for solving is：
s.t BGWG+BLWL-Wd=0
WGmin≤WG≤WGmax
WLmin≤WL≤WLmax
0≤Wd≤WD
In formula, WG=[WG1,WG2,,WGl]T, WGi(i=1,2, L, l) be i-th competing generators plan electricity, l is competing generators
Number；WL=[WL1,WL2,,WLn]T, WLj(j=1,2, L, are n) the transmission electricity of j-th strip interconnection, and n is the bar of interconnection
Number.
5. electricity is transmitted in generation schedule Security Checking according to claim 3 to calculate and subregion electricity method of adjustment, its
It is characterised by, each place of safety optimum competing generators acceptance of the bid electricity and interconnection transmission electricity method for solving in described step S605
For：
s.t BGWG+BLWL-WD=0
WGmin≤WG≤WGmax
WLmin≤WL≤WLmax
In formula, WG=[WG1,WG2,,WGl]T, WGi(i=1,2, L, l) be i-th competing generators plan electricity, l is competing generators
Number；WL=[WL1,WL2,,WLn]T, WLj(j=1,2, L, are n) the transmission electricity of j-th strip interconnection, and n is the bar of interconnection
Number, Pi(i=1,2, L, l) be i-th unit electricity price.
6. electricity is transmitted in generation schedule Security Checking according to claim 1 to calculate and subregion electricity method of adjustment, its
It is characterised by, in described step S1, the electromotor quantity of the quantity of place of safety and each security partitioning and system loading should be protected
Hold in rational scope, meanwhile, power grid security Division should meet following principle：
(1) according to electrical network power supply area and load character, rationalization partition, several supply and demand subregion in a basic balance is formed, and
Jing interconnections are connected with adjacent area, keep standby each other between adjacent area；
(2) safety analysiss to different electrical networks should be differentiated, and need not require that there is same level of security in all regions,
Different analysis methods or evaluation criteria should be taken according to the practical situation in each region.
7. electricity is transmitted in generation schedule Security Checking according to claim 1 to calculate and subregion electricity method of adjustment, its
It is characterised by, the peace that interconnection limit value should consider interconnection history run state, be connected is set in described step S3
The factors such as whole district's state.
8. electricity is transmitted in generation schedule Security Checking according to claim 1 to calculate and subregion electricity method of adjustment, its
It is characterised by, check analysis in described step S5 should one by one judge whether each interconnection transmission electricity that calculation and check is obtained surpasses
Its limit value is crossed, if so, then needing to skip to S6 carries out subregion electricity adjustment, if it is not, then skipping to step S7.
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| CN109447379A (en) * | 2019-01-09 | 2019-03-08 | 国电南瑞科技股份有限公司 | The step-by-step optimization method and system of long-term power secure correction in a kind of |
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