CN105720584A - Integer programming based reactive power instruction optimal allocation method for province dispatcher during automatic volume control (AVC) province and local coordinated control process - Google Patents
Integer programming based reactive power instruction optimal allocation method for province dispatcher during automatic volume control (AVC) province and local coordinated control process Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
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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
- Y02E40/30—Reactive power compensation
Abstract
The invention discloses an integer programming based reactive power instruction optimal allocation method for a province dispatcher during automatic volume control (AVC) province and local coordinated control process. The method comprise the following steps of (1) using a reactive power target value of a gateway of a province dispatcher with regard to a main transformer of the gateway at a high-voltage side in a splitting operation condition, and allocating total reactive power target values issued from the province dispatcher to two main transformers of the gateway by a local dispatcher with regard to the main transformers of the gateways run in parallel at the high-voltage side and run at a medium-voltage side and a low-voltage side in splitting operation conditions; (2) traversing a switchable reactive power device set Cin of 110kV and 220kV substation sets ST only run at the high-voltage side in two sub-regions, and forming respective available reactive power device set; (3) sequencing serious degrees of reactive power residual substations; and (4) carrying out combination enumeration on a capacitor, and finally forming an optimal capacitor set. By the method, the adjustment target can be enabled to be achieved by minimum action frequencies within the shortest time during the process of province and local combined dispatching, and adjustment oscillation is prevented.
Description
Technical field
The present invention relates to a kind of AVC coordinate control process is adjusted based on the province of integer programming the optimum allocation method of idle instruction with economizing, belong to operation and control of electric power system technical field.
Background technology
The feature of China's electrical network is according to different province and district, administrative region, county, it is divided into the regional power grid of different levels, the regional power network (adjust) in provincial power network scheduling unified management one's respective area, the County Power Grid (county's tune) in regional power network management one's respective area.Three grades of electrical networks main management 500kV electrical network, 220kV and 110kV electrical network, 66 (35) kV electrical networks respectively, the electrical network close-coupled of three levels, but control system is distributed to be present in three layers dispatching patcher, multilevel coordination in order to solve zones of different electrical network AVC system controls to be a classification, layering, complicated distributed hierarchical optimal control problem, it is necessary to adopt AVC to coordinate to control.Its core concept is to regard the AVC systems at different levels that wide area is distributed as control system that dispersion is independent, made up the deficiency of local message by the information transmission of timing between control systems at different levels, isolated dispatching patchers so at different levels can realize two-way interaction alternately by information, rationally utilize the Reactive-power control resource of dispatching patcher at different levels fully, realize concertedness and the concordance of distributed AVC system at different levels, achieve in global scope line voltage and idle optimal control.
Economizing ground AVC to coordinate to control to be coordinate a critical level in control process, its cooperation flow is as follows:
1, electrical network is adjusted to add up and upload Reactive-power control ability to economizing tune；
2, economize adjust by idle work optimization obtain desired value and issue desired value to adjust critical point；
3, adjust by remote control switching reactive apparatus；
This closed loop regulates process can pass through idle work optimization United Dispatching reactive apparatus in a wider context, it is achieved the idle optimal flow of multistage power grid, to ensure voltage, reduces network loss simultaneously.
Consider the radial feature of area power grid, when main transformer high-pressure side, two, 220kV main transformer critical point is arranged side by side, during the equal split operation in mesolow side, owing to the two main transformer coupling is only small, its ruuning situation is little affected by the impact of another main transformer, old place adjusts AVC system that these two main transformers are processed into two critical points respectively, and form two subregions with the two main transformer for root node, each independent regulation and control, when carrying out province's ground joint debugging, economizing tune issues Target of Reactive Power value should to these two main transformers respectively, and ground is adjusted also should add up respective Reactive-power control amount respectively.But adjust AVC side economizing, when two critical points of 220kV main transformer high-pressure side paired running, economize and adjust the idle situation of entirety more paying close attention to these two main transformers, therefore these two main transformers are seen a critical point by it when carrying out idle work optimization, so economize the total Target of Reactive Power value adjusting side also only to issue this overall critical point, ground adjusts these two after receiving idle instruction, reactive apparatus is regulated respectively in respective region, total idle province that reaches is made to adjust in the scope required, but the adjustment target in each region should with the desired value of the 220kV main transformer of root node for standard, if what province's tune issued is the total idle situation of two critical point main transformers, rather than the Target of Reactive Power value of separate unit critical point main transformer, and when two region reactive reserve are unbalanced, ground is adjusted and is obtained less than respective desired value, will be unable to regulate；Meanwhile, if Target of Reactive Power value unreasonable distribution, it is more likely that cause adjustment vibration, even worsen the idle of certain region and voltage.Therefore need to find a rational idle distribution method, while ensureing the idle and voltage in respective region, minimum action frequency in the shortest time, can be used to reach to regulate target.
Summary of the invention
For the deficiency that prior art exists, it is an object of the present invention to provide a kind of AVC coordinate control process is adjusted based on the province of integer programming the optimum allocation method of idle instruction with economizing, can ensure that it is minimum that optimization aim is that number of equipment action reaches in economizing ground joint debugging process, and do not have adjustment vibration.
To achieve these goals, the present invention realizes by the following technical solutions:
A kind of AVC of the present invention economizes ground and coordinates to adjust based on the province of integer programming in control process the optimum allocation method of idle instruction, including following step:
(1) adjusting side AVC first to add up the reactive reserve amount of each critical point main transformer, then timing receipt economizes the critical point Target of Reactive Power value adjusted, for the critical point main transformer of high-pressure side split operation, directly uses and economizes the critical point Target of Reactive Power value adjusted；For the high-pressure side critical point main transformer of mesolow side split operation side by side, ground is adjusted and is adjusted the total Target of Reactive Power value issued to distribute to two critical point main transformers according to the following relations of distribution by economizing, and the described relations of distribution obtain by solving following integer programming model:
Wherein, Qres_down_1、Qres_down_2Represent the excised reactive capability regulating region belonging to the main transformer of Liang Tai critical point, region respectively；P10、P20Represent that Liang Tai critical point, region main transformer is currently gained merit respectively；Represent the power factor lower limit that main transformer place, Liang Tai critical point, region specifies respectively；Economize and adjust the Target of Reactive Power being handed down to focal point place to be limited to [Q up and downmin,Qmax], the on high-tension side idle respectively Q of current main transformer1And Q2, the Reactive-power control amount respectively Δ Q in two regions1With Δ Q2, Δ Q=[Δ Q1,ΔQ2],Represent in two regions the rated capacity of each capacitor, CN in reactive power reserve set respectively1,CN2It is two region inner capacitor quantity, U1,U2Be dimension it is CN1,CN2Row vector, its element be 0 or 1,0 represent this capacitor do not put into electrical network, 1 represent this capacitor access electrical network, object function adopt 1 norm to be to ensure that in two regions action frequency is minimum；
(2) 110kV and the 220kV transformer station in two subregions of only high-pressure side paired running is collected the reactive apparatus the cut collection C of STinTravel through, form each available reactive apparatus collection；
(3) the idle superfluous transformer station order of severity is ranked up；
(4) according to hard constraint and soft-constraint, it is combined enumerating to capacitor, ultimately forms optimum capacitance device set.
In step (2), each available reactive apparatus collection is as follows:
● available reactive apparatus collection C in first subregionin_avail_1=C220in_avail_1∪C110in_avail_1And correspondence transformer station set STin_avail_1=ST220in_avail_1∪ST110in_avail_1, wherein ST220in_avail_1Gather for 220kV transformer station in subregion 1, ST110in_avail_1Gather for 110kV transformer station in subregion 1, C220in_avail_1For ST220in_avail_1The capacitor collection that set is corresponding, C110in_avail_1For ST110in_avail_1The capacitor collection that set is corresponding；
● available reactive apparatus collection C in second subregionin_avail_2=C220in_avail_2∪C110in_avail_2And correspondence transformer station set STin_avail_2=ST220in_avail_2∪ST110in_avail_2, wherein ST220in_avail_2Gather for 220kV transformer station in subregion 2, ST110in_avail_2Gather for 110kV transformer station in subregion 2, C220in_avail_2For ST220in_avail_2The capacitor collection that set is corresponding, C110in_avail_2For ST110in_avail_2The capacitor collection that set is corresponding；
STin_avail_1、STin_avail_2It is the supplementary set of the transformer station's collection having the following properties that in ST:
(1-1a) transformer station's set of idle deficient benefit state it is in；
(1-2a) voltage gets over transformer station's set of lower limit；
Cin_avail_1、Cin_avail_2It is the supplementary set having the following properties that in all of capacitor set:
(1-1b) the capacitor set of blocking it is in；
(1-2b) the capacitor set of last just action；
(1-3b) the capacitor set of excision state it is in；
(1-4b) the capacitor set under idle Qian Bu state transformer station it is in；
(1-5b) voltage gets over the capacitor set under lower limit transformer station.
In step (3), the method that the idle superfluous transformer station order of severity is ranked up is as follows:
● plant stand set ST in scanning subregion 1 successivelyin_avail_1If the current idle set of correspondence is STQcur,
Idle upper limit set is STQup_1, calculate the order of severity DSTQ of each transformer stationup_1=STQup_1-STQcur_1, to DSTQup_1Being ranked up according to order from small to large, the set of corresponding transformer station is { st1_220,st1_110_st1,st1_110_st2,...,st1_110_stn, namely to transformer station i, j ∈ STin_avail_1If, DSTQupi_1<DSTQupj_1, then st1_110_stiCome st1_110_stjAbove, corresponding capacitor set { c1_220_1,…,c1_220_num220,c1_110st1_1,c1_110st1_2,…c1_110_stn_num, the capacitor finite level that the dynamic actions available number of times of same transformer station inner capacitor is maximum is the highest；The capacitor priority that in standing, actions available number of times is maximum is the highest；
● in like manner can obtain subregion 2 plant stand set { st2_220,st2_110_st1,st2_110_st2,...,st2_110_stnAnd capacitor set { c2_220_1,…,c2_220_num220,c2_110st1_1,c2_110st1_2,…c2_110_stn_num}；
● to { st1_220,st1_110_st1,st1_110_st2,...,st1_110_stn, { st2_220,st2_110_st1,st2_110_st2,...,st2_110_stnThe two set is ranked up without merits and demerits benefit degree according to total, obtains plant stand in two subregions and cross benefit degree plant stand set { st1_220,st2_220,st110_st1,st110_st2,...,st110_stnAnd the interior corresponding capacitor set { c of plant stand1_220_1,…,c2_220_num220,c110st1_1,c110st1_2,…c110_stn_num}；
● under normal circumstances, the capacitor of equal capacity such as configuration in same transformer station, the impact that the whole network trend is distributed by these capacitors is of substantially equal, so have only to the capacitor considering to rank the first in each station when being optimized decision-making, therefore the standby decision set of final capacitor is { c1_220_1,c2_220_2,c110st1_1,…,c110stn_1}。
In step (4), the purpose of combinatorial enumeration is at { c1_220_1,c1_110st1_1,…,c1_110stn_1In determine { st1_220,st1_110_st1,st1_110_st2,...,st1_110_stn, at { c2_220_1,c2_110st1_1,…,c2_110stn_1In determine { st2_220,st2_110_st1,st2_110_st2,...,st2_110_stnIn need excision capacitor set.
In step (4), described soft-constraint is as follows:
(1-1c) can not causing subregion 1 idle normal transformer station reactive power constraints after the excision of subregion 1 inner capacitor, subregion 2 also has same constraint；
(1-2c) can not causing that the subregion 1 normal transformer substation voltage of voltage is out-of-limit after the excision of subregion 1 inner capacitor, subregion 2 also has same constraint；
Two above soft-constraint can be relaxed to following three constraint when optimization problem is without solution:
(1-3c) in subregion 1, the action of 220kV transformer station inner capacitor can not cause that in this subregion, 1-2 the normal transformer substation voltage of 110kV voltage is out-of-limit, and subregion 2 also has same constraint；
(1-4c) in subregion 1, the action of 110kV transformer station inner capacitor can not cause higher level 110kV idle normal transformer station reactive power constraints in its subregion, and subregion 2 also has same constraint；
(1-5c) in subregion 1, the action of 110kV transformer station inner capacitor can not cause the normal power transformation voltage out-of-limit of 1-2 35kV voltage being with in its subregion, and subregion 2 also has same constraint.
In step (4), described hard constraint is as follows:
(1-1d) 220kV plant stand critical point is always idle in the scope economizing tune examination；
(1-2d), while subregion 1 and subregion 2 reach the Reactive-power control target that region is total again, the Reactive Power Margin keeping setting, concrete Δ Q in subregion, are needed1> Qreserve_out_1,ΔQ2> Qreserve_out_2, wherein Qreserve_outPhysical significance be when under all end transformer stations under certain electric bus all capacitors all in excision state, if putting into the idle total variable quantity in critical point that a capacitor causes under this bus, what Δ Q represented is after final decision goes out capacitor excision, critical point is idle and difference between the idle lower limit in critical point, it is ensured that this nargin in order to when preventing nine-zone diagram from regulating the input of capacitor cause the idle adjustment vibration in critical point；
Two above hard constraint have to meet in problem solving process simultaneously, can not violate.
In step (4), final decision-making capacitor set needs there are following concentration different situations at following standby set of strategies M:
Time,
Time,
Time,
Time,
Capacitor set Mn forming process is in fact the process of a recursion, wherein
{cmk_1, cmk_2..., cmk_PkIt it is the spare capacitor set that goes out of decision-making, subscript k represents (k+1) individual set M (k+1), subscript pk represents the subscript of capacitor in M (k+1), in this set, 220kV substation capacitors ranked first, and 110kV capacitor is ranked up being formed according to soft-constraint and hard constraint；Mn has priority, if namelyThen final decision-making action capacitor set is Mn.
The formation rule of M1 is as follows:
After first Element generation of Step1.M1, the set of formation is M1={c1_220_1Or
Select the capacitor c that in first subregion, 220kV plant stand ranks the first1_220_1, whether meet soft-constraint above and hard constraint after calculating the excision of this capacitor by sensitivity method:
◆ if soft-constraint and hard constraint, then M1={c can be met simultaneously1_220_1, terminating combinatorial enumeration process, final action capacitor is c1_220_1；
If ◆ meet soft-constraint (1-1c)-(1-2c), but be unsatisfactory for hard constraint, and the critical point idle more upper limit, then M1={c after excision1_220_1, enter the decision phase to second subregion 220kV plant stand；If being unsatisfactory for hard constraint, and the idle upper limit in critical point after excision, illustrate that this condenser capacity is improper,Enter the decision phase to second subregion 220kV plant stand；
If ◆ meet hard constraint, but be unsatisfactory for soft-constraint, after soft-constraint is relaxed further, adopt sensitivity method to verify out and meet soft-constraint (1-1c) and hard constraint (1-1d)-(1-2d), then M1={c simultaneously220_1, if being still unsatisfactory for soft-constraint (1-1c), this capacitor is failure to actuate,Enter the decision phase to second subregion 220kV plant stand；
After second Element generation of Step2.M1, the set of formation can be divided into two categories below by the quantity comprising capacitor:
One element:
M1={c1_220_1}、
Two elements:
M1={c1_220_1,c2_220_1}
M1={c in 2.1Step11_220_1}
Select the capacitor c of 220kV plant stand in Two Areas2_220_1, whether meet soft-constraint above and hard constraint after calculating the excision of this capacitor by sensitivity method:
◆ if soft-constraint and hard constraint, then M1={c can be met simultaneously1_220_1,c2_220_1, terminate combinatorial enumeration process；
If ◆ meet soft-constraint (1-3c)-(1-5c), but be unsatisfactory for hard constraint, and the critical point idle more upper limit, then M1={c after excision1_220_1,c2_220_1, enter the decision phase to second plant stand；If being unsatisfactory for hard constraint, and the idle upper limit in critical point after excision, this capacitor is failure to actuate, M1={c1_220_1, enter the decision phase to second plant stand；
If ◆ meet hard constraint, but be unsatisfactory for soft-constraint, after soft-constraint is relaxed further, adopt whether sensitivity method verification meets soft-constraint (1-3c)-(1-5c) and hard constraint simultaneously, if being still unsatisfactory for soft-constraint, this capacitor is failure to actuate, M1={c1_220_1, enter the decision phase to second plant stand；
In 2.2Step1Time
Under normal circumstances, the capacitor of configuration such as is at the rated capacity in 220kV plant stand, if thereforeThen in second subregion, the capacitor of 220kV plant stand also can not meet, after judging, the hard constraint that critical point is idle certainly, so still having after this step
After the 3rd Element generation of Step3.M1, the set of formation can be divided into two categories below by the quantity comprising capacitor:
One element of final decision:
M1={c110_st1_1, M1={c1_220_1}
Two elements:
M1={c1_220_1,c2_220_1, M1={c1_220_1,c110_st1_1}
Three elements:
M1={c1_220_1,c2_220_1,c110_st1_1}
M1={c in 2.1Step21_220_1}
Select capacitor c110_st1_1, whether meet soft-constraint above and hard constraint after calculating the excision of this capacitor by sensitivity method:
◆ if soft-constraint and hard constraint, then M1={c can be met simultaneously220_1,c110_st1_1, terminate combinatorial enumeration process；
If ◆ meet (1-3c)-(1-5c), but be unsatisfactory for hard constraint, and the critical point idle more upper limit, then M1={c after excision220_1,c110_st1_1, enter the decision phase to the 3rd plant stand；If being unsatisfactory for hard constraint, and the idle upper limit in critical point after excision, this capacitor is failure to actuate, M1={c1_220_1, enter the decision phase to the 3rd plant stand；
If ◆ meet hard constraint, but be unsatisfactory for soft-constraint, after soft-constraint is relaxed further, adopt whether sensitivity method verification meets (1-3c)-(1-5c) and hard constraint simultaneously, if being still unsatisfactory for soft-constraint, this capacitor is failure to actuate, M1={c1_220_1, enter the decision phase to the 3rd plant stand；
In 2.2Step2Time
Select capacitor C110_st1_1, whether meet soft-constraint above and hard constraint after calculating the excision of this capacitor by sensitivity method:
◆ if soft-constraint and hard constraint can be met simultaneously, excise this capacitor, M1={c110_st1_1, terminate combinatorial enumeration process；
If ◆ meet soft-constraint (1-3c)-(1-5c), but be unsatisfactory for hard constraint, and excision after critical point idle get over the upper limit, then excise this capacitor, M1={c110_st1_1, enter the decision phase to the 3rd plant stand；If being unsatisfactory for hard constraint, and the idle upper limit in critical point after excision, this capacitor is failure to actuate,Enter the decision phase to the 3rd plant stand；
◆ if meeting hard constraint, but be unsatisfactory for soft-constraint, after soft-constraint being relaxed further, adopt whether sensitivity method verification meets soft-constraint 2,3 and hard constraint simultaneously, if being still unsatisfactory for soft-constraint, this capacitor is failure to actuate,Enter the decision phase to the 3rd plant stand；
M1={c in 2.2Step31_220_1,c2_220_1Time
Select capacitor C110_st1_1, whether meet soft-constraint above and hard constraint after calculating the excision of this capacitor by sensitivity method:
◆ if soft-constraint and hard constraint can be met simultaneously, excise this capacitor,
M1={c1_220_1,c2_220_1,c110_st1_1, terminate combinatorial enumeration process；
If ◆ meet soft-constraint 2,3, but be unsatisfactory for hard constraint, and excision after critical point idle get over the upper limit, then excise this capacitor, M1={c1_220_1,c2_220_1,c110_st1_1, enter the decision phase to the 3rd plant stand；If being unsatisfactory for hard constraint, and the idle upper limit in critical point after excision, this capacitor is failure to actuate, M1={c1_220_1,c2_220_1, enter the decision phase to the 3rd plant stand；
◆ if meeting hard constraint, but be unsatisfactory for soft-constraint, after soft-constraint being relaxed further, adopt whether sensitivity method verification meets soft-constraint 2,3 and hard constraint simultaneously, if being still unsatisfactory for soft-constraint, this capacitor is failure to actuate, M1={c1_220_1,c2_220_1, enter the decision phase to the 3rd plant stand；
So analyze, until the decision-making of the 7th plant stand terminates；
If the 7th plant stand decision-making goes outThen final capacitor decision set is M=M1；
If the 7th plant stand decision-making goes outThen do not consider further that the soft-constraint of the 7th 110kV plant stand, again start to do decision-making as above from first plant stand, only now only consider now to obtain M2 by hard constraint, ifM=M2；
If the 7th plant stand decision-making goes outThen do not consider further that the soft-constraint of the 7th, the 6th 110kV plant stand, again start to do decision-making as above from first plant stand, only now only consider now to obtain M3 by hard constraint, ifM=M3；
So on, until after being left out all 110kV plant stands, being left out soft-constraintThen do not consider further that 220kV plant stand and the soft-constraint of all 110kV plant stands, again start to do decision-making as above from first plant stand, only now only consider now to obtain M9 by hard constraint, consider that province adjusts the idle bound issued not too large with currently without work difference value, therefore M9 will not be empty set.
The present invention is at focal point place of 220kV transformer station, when two critical point main transformer only high-pressure side paired runnings, economize and adjust side AVC only to issue total Target of Reactive Power value, but ground is adjusted when being adjusted, and is to rely on the Target of Reactive Power value of every main transformer with the adjustment in two regions that the two critical point main transformer is root node.In order to realize the optimum allocation of total idle instruction, the present invention adjusts the AVC requirement coordinating to control and ground to adjust ruuning situation to combine by economizing, under ensureing the target that in two subregions formed with two critical point main transformers for root node, reactive apparatus action frequency is minimum, consider deciliter state of reactive apparatus in subregion simultaneously, exert oneself and the voltage power-less of the whole network electrical network is affected situation, propose a kind of optimum allocation method economizing the idle instruction of tune greatly reducing search volume, what the method was strict meets the requirement that province adjusts, reduce number of times and the capacity of adjustment equipment simultaneously, the voltage power-less that simultaneously can also avoid local and the overall situation as far as possible regulates vibration, effectively raise the practicality coordinating to control of province's ground reactive voltage.
Detailed description of the invention
For the technological means making the present invention realize, creation characteristic, reach purpose and effect and be easy to understand, below in conjunction with detailed description of the invention, the present invention is expanded on further.
Without loss of generality, it is considered herein that the main transformer number of only high-pressure side paired running is 2.
1: 110kV and the 220kV transformer station in two subregions of only high-pressure side paired running is collected the reactive apparatus the cut collection C of STinTravel through, form following set:
● available reactive apparatus collection C in first subregionin_avail_1=C220in_avail_1∪C110in_avail_1And correspondence transformer station set STin_avail_1=ST220in_avail_1∪ST110in_avail_1, wherein ST220in_avail_1For 220kV transformer station set ST in subregion 1110in_avail_1Gather for 110kV transformer station in subregion 1, C220in_avail_1For ST220in_avail_1The capacitor collection that set is corresponding, C110in_avail_1For ST110in_avail_1The capacitor collection that set is corresponding；
● available reactive apparatus collection C in first subregionin_avail_2=C220in_avail_2∪C110in_avail_2And correspondence transformer station set STin_avail_2=ST220in_avail_2∪ST110in_avail_2, wherein ST220in_avail_2For 220kV transformer station set ST in subregion 2110in_avail_2Gather for 110kV transformer station in subregion 2, C220in_avail_2For ST220in_avail_2The capacitor collection that set is corresponding, C110in_avail_2For ST110in_avail_2The capacitor collection that set is corresponding；
STin_avail_1、STin_avail_2It is the supplementary set of the transformer station's collection having the following properties that in ST:
(1-1a) transformer station's set of idle deficient benefit state it is in；
(1-2a) voltage gets over transformer station's set of lower limit；
Cin_avail_1、Cin_avail_2It is the supplementary set having the following properties that in all of capacitor set:
(1-1b) the capacitor set of blocking it is in；
(1-2b) the capacitor set of last just action；
(1-3b) the capacitor set of excision state it is in；
(1-4b) the capacitor set under idle Qian Bu state transformer station it is in；
(1-5b) voltage gets over the capacitor set under lower limit transformer station.
In step (3), the method that the idle superfluous transformer station order of severity is ranked up is as follows:
● plant stand set ST in scanning subregion 1 successivelyin_avail_1If the current idle set of correspondence is STQcur, idle upper limit set is STQup_1, calculate the order of severity DSTQ of each transformer stationup_1=STQup_1-STQcur_1, to DSTQup_1Being ranked up according to order from small to large, the set of corresponding transformer station is { st1_220,st1_110_st1,st1_110_st2,...,st1_110_stn, namely to transformer station i, j ∈ STin_avail_1If, DSTQupi_1<DSTQupj_1, then st1_110_stiCome st1_110_stjAbove, corresponding capacitor set { c1_220_1,…,c1_220_num220,c1_110st1_1,c1_110st1_2,…c1_110_stn_num, the capacitor finite level that the dynamic actions available number of times of same transformer station inner capacitor is maximum is the highest；The capacitor priority that in standing, actions available number of times is maximum is the highest；
● in like manner can obtain subregion 2 plant stand set { st2_220,st2_110_st1,st2_110_st2,...,st2_110_stnAnd capacitor set { c2_220_1,…,c2_220_num220,c2_110st1_1,c2_110st1_2,…c2_110_stn_num}；
● to { st1_220,st1_110_st1,st1_110_st2,...,st1_110_stn, { st2_220,st2_110_st1,st2_110_st2,...,st2_110_stnThe two set is ranked up without merits and demerits benefit degree according to total, obtains plant stand in two subregions and cross benefit degree plant stand set { st1_220,st2_220,st110_st1,st110_st2,...,st110_stnAnd the interior corresponding capacitor set { c of plant stand1_220_1,…,c2_220_num220,c110st1_1,c110st1_2,…c110_stn_num}；
● under normal circumstances, the capacitor of equal capacity such as configuration in same transformer station, the impact that the whole network trend is distributed by these capacitors is of substantially equal, so have only to the capacitor considering to rank the first in each station when being optimized decision-making, therefore the standby decision set of final capacitor is { c1_220_1,c2_220_2,c110st1_1,…,c110stn_1}。
In step (4), the purpose of combinatorial enumeration is at { c1_220_1,c1_110st1_1,…,c1_110stn_1In determine { st1_220,st1_110_st1,st1_110_st2,...,st1_110_stn, at { c2_220_1,c2_110st1_1,…,c2_110stn_1In determine { st2_220,st2_110_st1,st2_110_st2,...,st2_110_stnIn need excision capacitor set.
In step (4), described soft-constraint is as follows:
(1-1c) can not causing subregion 1 idle normal transformer station reactive power constraints after the excision of subregion 1 inner capacitor, subregion 2 also has same constraint；
(1-2c) can not causing that the subregion 1 normal transformer substation voltage of voltage is out-of-limit after the excision of subregion 1 inner capacitor, subregion 2 also has same constraint；
Two above soft-constraint can be relaxed to following three constraint when optimization problem is without solution:
(1-3c) in subregion 1, the action of 220kV transformer station inner capacitor can not cause that in this subregion, 1-2 the normal transformer substation voltage of 110kV voltage is out-of-limit, and subregion 2 also has same constraint；
(1-4c) in subregion 1, the action of 110kV transformer station inner capacitor can not cause higher level 110kV idle normal transformer station reactive power constraints in its subregion, and subregion 2 also has same constraint；
(1-5c) in subregion 1, the action of 110kV transformer station inner capacitor can not cause the normal power transformation voltage out-of-limit of 1-2 35kV voltage being with in its subregion, and subregion 2 also has same constraint.
In step (4), described hard constraint is as follows:
(1-1d) 220kV plant stand critical point is always idle in the scope economizing tune examination；
(1-2d), while subregion 1 and subregion 2 reach the Reactive-power control target that region is total again, the Reactive Power Margin keeping setting, concrete Δ Q in subregion, are needed1> Qreserve_out_1,ΔQ2> Qreserve_out_2, wherein Qreserve_outPhysical significance be when under all end transformer stations under certain electric bus all capacitors all in excision state, if putting into the idle total variable quantity in critical point that a capacitor causes under this bus, what Δ Q represented is after final decision goes out capacitor excision, critical point is idle and difference between the idle lower limit in critical point, it is ensured that this nargin in order to when preventing nine-zone diagram from regulating the input of capacitor cause the idle adjustment vibration in critical point；
Two above hard constraint have to meet in problem solving process simultaneously, can not violate.
In step (4), final decision-making capacitor set needs there are following concentration different situations at following standby set of strategies M:
Time,
Time,
Time,
Time,
Capacitor set Mn forming process is in fact the process of a recursion, wherein { cmk_1, cmk_2..., cmk_PkIt it is the spare capacitor set that goes out of decision-making, subscript k represents (k+1) individual set M (k+1), subscript pk represents the subscript of capacitor in M (k+1), in this set, 220kV substation capacitors ranked first, and 110kV capacitor is ranked up being formed according to soft-constraint and hard constraint；Mn has priority, if namelyThen final decision-making action capacitor set is Mn.
The formation rule of M1 is as follows:
After first Element generation of Step1.M1, the set of formation is M1={c1_220_1Or
Select the capacitor c that in first subregion, 220kV plant stand ranks the first1_220_1, whether meet soft-constraint above and hard constraint after calculating the excision of this capacitor by sensitivity method:
◆ if soft-constraint and hard constraint, then M1={c can be met simultaneously1_220_1, terminating combinatorial enumeration process, final action capacitor is c1_220_1；
If ◆ meet soft-constraint (1-1c)-(1-2c), but be unsatisfactory for hard constraint, and the critical point idle more upper limit, then M1={c after excision1_220_1, enter the decision phase to second subregion 220kV plant stand；If being unsatisfactory for hard constraint, and the idle upper limit in critical point after excision, illustrate that this condenser capacity is improper,Enter the decision phase to second subregion 220kV plant stand；
If ◆ meet hard constraint, but be unsatisfactory for soft-constraint, after soft-constraint is relaxed further, adopt sensitivity method to verify out and meet soft-constraint (1-1c) and hard constraint (1-1d)-(1-2d), then M1={c simultaneously220_1, if being still unsatisfactory for soft-constraint (1-1c), this capacitor is failure to actuate,Enter the decision phase to second subregion 220kV plant stand；
After second Element generation of Step2.M1, the set of formation can be divided into two categories below by the quantity comprising capacitor:
One element:
M1={c1_220_1}、
Two elements:
M1={c1_220_1,c2_220_1}
M1={c in 2.1Step11_220_1}
Select the capacitor c of 220kV plant stand in Two Areas2_220_1, whether meet soft-constraint above and hard constraint after calculating the excision of this capacitor by sensitivity method:
◆ if soft-constraint and hard constraint, then M1={c can be met simultaneously1_220_1,c2_220_1, terminate combinatorial enumeration process；
If ◆ meet soft-constraint (1-3c)-(1-5c), but be unsatisfactory for hard constraint, and the critical point idle more upper limit, then M1={c after excision1_220_1,c2_220_1, enter the decision phase to second plant stand；If being unsatisfactory for hard constraint, and the idle upper limit in critical point after excision, this capacitor is failure to actuate, M1={c1_220_1, enter the decision phase to second plant stand；
If ◆ meet hard constraint, but be unsatisfactory for soft-constraint, after soft-constraint is relaxed further, adopt whether sensitivity method verification meets soft-constraint (1-3c)-(1-5c) and hard constraint simultaneously, if being still unsatisfactory for soft-constraint, this capacitor is failure to actuate, M1={c1_220_1, enter the decision phase to second plant stand；
In 2.2Step1Time
Under normal circumstances, the capacitor of configuration such as is at the rated capacity in 220kV plant stand, if thereforeThen in second subregion, the capacitor of 220kV plant stand also can not meet, after judging, the hard constraint that critical point is idle certainly, so still having after this step
After the 3rd Element generation of Step3.M1, the set of formation can be divided into two categories below by the quantity comprising capacitor:
One element of final decision:
M1={c110_st1_1, M1={c1_220_1}
Two elements:
M1={c1_220_1,c2_220_1, M1={c1_220_1,c110_st1_1}
Three elements:
M1={c1_220_1,c2_220_1,c110_st1_1}
M1={c in 2.1Step21_220_1}
Select capacitor c110_st1_1, whether meet soft-constraint above and hard constraint after calculating the excision of this capacitor by sensitivity method:
◆ if soft-constraint and hard constraint, then M1={c can be met simultaneously220_1,c110_st1_1, terminate combinatorial enumeration process；
If ◆ meet (1-3c)-(1-5c), but be unsatisfactory for hard constraint, and the critical point idle more upper limit, then M1={c after excision220_1,c110_st1_1, enter the decision phase to the 3rd plant stand；If being unsatisfactory for hard constraint, and the idle upper limit in critical point after excision, this capacitor is failure to actuate, M1={c1_220_1, enter the decision phase to the 3rd plant stand；
If ◆ meet hard constraint, but be unsatisfactory for soft-constraint, after soft-constraint is relaxed further, adopt whether sensitivity method verification meets (1-3c)-(1-5c) and hard constraint simultaneously, if being still unsatisfactory for soft-constraint, this capacitor is failure to actuate, M1={c1_220_1, enter the decision phase to the 3rd plant stand；
In 2.2Step2Time
Select capacitor C110_st1_1, whether meet soft-constraint above and hard constraint after calculating the excision of this capacitor by sensitivity method:
◆ if soft-constraint and hard constraint can be met simultaneously, excise this capacitor, M1={c110_st1_1, terminate combinatorial enumeration process；
If ◆ meet soft-constraint (1-3c)-(1-5c), but be unsatisfactory for hard constraint, and excision after critical point idle get over the upper limit, then excise this capacitor, M1={c110_st1_1, enter the decision phase to the 3rd plant stand；If being unsatisfactory for hard constraint, and the idle upper limit in critical point after excision, this capacitor is failure to actuate,Enter the decision phase to the 3rd plant stand；
◆ if meeting hard constraint, but be unsatisfactory for soft-constraint, after soft-constraint being relaxed further, adopt whether sensitivity method verification meets soft-constraint 2,3 and hard constraint simultaneously, if being still unsatisfactory for soft-constraint, this capacitor is failure to actuate,Enter the decision phase to the 3rd plant stand；
M1={c in 2.2Step31_220_1,c2_220_1Time
Select capacitor C110_st1_1, whether meet soft-constraint above and hard constraint after calculating the excision of this capacitor by sensitivity method:
◆ if soft-constraint and hard constraint can be met simultaneously, excise this capacitor, M1={c1_220_1,c2_220_1,c110_st1_1, terminate combinatorial enumeration process；
If ◆ meet soft-constraint 2,3, but be unsatisfactory for hard constraint, and excision after critical point idle get over the upper limit, then excise this capacitor, M1={c1_220_1,c2_220_1,c110_st1_1, enter the decision phase to the 3rd plant stand；If being unsatisfactory for hard constraint, and the idle upper limit in critical point after excision, this capacitor is failure to actuate, M1={c1_220_1,c2_220_1, enter the decision phase to the 3rd plant stand；
◆ if meeting hard constraint, but be unsatisfactory for soft-constraint, after soft-constraint being relaxed further, adopt whether sensitivity method verification meets soft-constraint 2,3 and hard constraint simultaneously, if being still unsatisfactory for soft-constraint, this capacitor is failure to actuate, M1={c1_220_1,c2_220_1, enter the decision phase to the 3rd plant stand；
So analyze, until the decision-making of the 7th plant stand terminates；
If the 7th plant stand decision-making goes outThen final capacitor decision set is M=M1；
If the 7th plant stand decision-making goes outThen do not consider further that the soft-constraint of the 7th 110kV plant stand, again start to do decision-making as above from first plant stand, only now only consider now to obtain M2 by hard constraint, ifM=M2；
If the 7th plant stand decision-making goes outThen do not consider further that the soft-constraint of the 7th, the 6th 110kV plant stand, again start to do decision-making as above from first plant stand, only now only consider now to obtain M3 by hard constraint, ifM=M3；
So on, until after being left out all 110kV plant stands, being left out soft-constraintThen do not consider further that 220kV plant stand and the soft-constraint of all 110kV plant stands, again start to do decision-making as above from first plant stand, only now only consider now to obtain M9 by hard constraint, consider that province adjusts the idle bound issued not too large with currently without work difference value, therefore M9 will not be empty set.
The method coordinates the situation of three main transformer only high-pressure side paired runnings in control with being also applied for province.After obtaining the idle optimal value of critical point main transformer, ground adjusts the corresponding instruction economizing tune that just can be independent to be adjusted.
The ultimate principle of the present invention and principal character and advantages of the present invention have more than been shown and described.Skilled person will appreciate that of the industry; the present invention is not restricted to the described embodiments; described in above-described embodiment and description is that principles of the invention is described; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements both fall within the claimed scope of the invention.Claimed scope is defined by appending claims and equivalent thereof.
Claims (8)
1. an AVC economizes the optimum allocation method adjusting idle instruction in ground coordination control process based on the province of integer programming, it is characterised in that include following step:
(1) adjusting side AVC first to add up the reactive reserve amount of each critical point main transformer, then timing receipt economizes the critical point Target of Reactive Power value adjusted, for the critical point main transformer of high-pressure side split operation, directly uses and economizes the critical point Target of Reactive Power value adjusted；For the high-pressure side critical point main transformer of mesolow side split operation side by side, ground is adjusted and is adjusted the total Target of Reactive Power value issued to distribute to two critical point main transformers according to the following relations of distribution by economizing, and the described relations of distribution obtain by solving following integer programming model:
Wherein, Qres_down_1、Qres_down_2Represent the excised reactive capability regulating region belonging to the main transformer of Liang Tai critical point, region respectively；P10、P20Represent that Liang Tai critical point, region main transformer is currently gained merit respectively；Represent the power factor lower limit that main transformer place, Liang Tai critical point, region specifies respectively；Economize and adjust the Target of Reactive Power being handed down to focal point place to be limited to [Q up and downmin,Qmax], the on high-tension side idle respectively Q of current main transformer1And Q2, the Reactive-power control amount respectively Δ Q in two regions1With Δ Q2, Δ Q=[Δ Q1,ΔQ2],Represent in two regions the rated capacity of each capacitor, CN in reactive power reserve set respectively1,CN2It is two region inner capacitor quantity, U1,U2Be dimension it is CN1,CN2Row vector, its element be 0 or 1,0 represent this capacitor do not put into electrical network, 1 represent this capacitor access electrical network, object function adopt 1 norm to be to ensure that in two regions action frequency is minimum；
(2) 110kV and the 220kV transformer station in two subregions of only high-pressure side paired running is collected the reactive apparatus the cut collection C of STinTravel through, form each available reactive apparatus collection；
(3) the idle superfluous transformer station order of severity is ranked up；
(4) according to hard constraint and soft-constraint, it is combined enumerating to capacitor, ultimately forms optimum capacitance device set.
2. AVC according to claim 1 economizes the optimum allocation method economizing the idle instruction of tune in ground coordination control process based on integer programming, it is characterised in that in step (2), and each available reactive apparatus collection is as follows:
● available reactive apparatus collection C in first subregionin_avail_1=C220in_avail_1∪C110in_avail_1And correspondence transformer station set STin_avail_1=ST220in_avail_1∪ST110in_avail_1, wherein ST220in_avail_1Gather for 220kV transformer station in subregion 1, ST110in_avail_1Gather for 110kV transformer station in subregion 1, C220in_avail_1For ST220in_avail_1The capacitor collection that set is corresponding, C110in_avail_1For ST110in_avail_1The capacitor collection that set is corresponding；
● available reactive apparatus collection C in second subregionin_avail_2=C220in_avail_2∪C110in_avail_2And correspondence transformer station set STin_avail_2=ST220in_avail_2∪ST110in_avail_2, wherein ST220in_avail_2Gather for 220kV transformer station in subregion 2, ST110in_avail_2Gather for 110kV transformer station in subregion 2, C220in_avail_2For ST220in_avail_2The capacitor collection that set is corresponding, C110in_avail_2For ST110in_avail_2The capacitor collection that set is corresponding；
STin_avail_1、STin_avail_2It is the supplementary set of the transformer station's collection having the following properties that in ST:
(1-1a) transformer station's set of idle deficient benefit state it is in；
(1-2a) voltage gets over transformer station's set of lower limit；
Cin_avail_1、Cin_avail_2It is the supplementary set having the following properties that in all of capacitor set:
(1-1b) the capacitor set of blocking it is in；
(1-2b) the capacitor set of last just action；
(1-3b) the capacitor set of excision state it is in；
(1-4b) the capacitor set under idle Qian Bu state transformer station it is in；
(1-5b) voltage gets over the capacitor set under lower limit transformer station.
3. AVC according to claim 1 economizes the optimum allocation method economizing the idle instruction of tune in ground coordination control process based on integer programming, it is characterised in that in step (3), and the method that the idle superfluous transformer station order of severity is ranked up is as follows:
● plant stand set ST in scanning subregion 1 successivelyin_avail_1If the current idle set of correspondence is STQcur, idle upper limit set is STQup_1, calculate the order of severity DSTQ of each transformer stationup_1=STQup_1-STQcur_1, to DSTQup_1Being ranked up according to order from small to large, the set of corresponding transformer station is { st1_220,st1_110_st1,st1_110_st2,...,st1_110_stn, namely to transformer station i, j ∈ STin_avail_1If, DSTQupi_1<DSTQupj_1, then st1_110_stiCome st1_110_stjAbove, corresponding capacitor set { c1_220_1,…,c1_220_num220,c1_110st1_1,c1_110st1_2,…c1_110_stn_num, the capacitor finite level that the dynamic actions available number of times of same transformer station inner capacitor is maximum is the highest；The capacitor priority that in standing, actions available number of times is maximum is the highest；
● in like manner can obtain subregion 2 plant stand set { st2_220,st2_110_st1,st2_110_st2,...,st2_110_stnAnd capacitor set { c2_220_1,…,c2_220_num220,c2_110st1_1,c2_110st1_2,…c2_110_stn_num}；
● to { st1_220,st1_110_st1,st1_110_st2,...,st1_110_stn, { st2_220,st2_110_st1,st2_110_st2,...,st2_110_stnThe two set is ranked up without merits and demerits benefit degree according to total, obtains plant stand in two subregions and cross benefit degree plant stand set { st1_220,st2_220,st110_st1,st110_st2,...,st110_stnAnd the interior corresponding capacitor set { c of plant stand1_220_1,…,c2_220_num220,c110st1_1,c110st1_2,…c110_stn_num}；
● under normal circumstances, the capacitor of equal capacity such as configuration in same transformer station, the impact that the whole network trend is distributed by these capacitors is of substantially equal, so have only to the capacitor considering to rank the first in each station when being optimized decision-making, therefore the standby decision set of final capacitor is { c1_220_1,c2_220_2,c110st1_1,…,c110stn_1}。
4. AVC according to claim 3 economizes the optimum allocation method economizing the idle instruction of tune in ground coordination control process based on integer programming, it is characterised in that in step (4), the purpose of combinatorial enumeration is at { c1_220_1,c1_110st1_1,…,c1_110stn_1In determine { st1_220,st1_110_st1,st1_110_st2,...,st1_110_stn, at { c2_220_1,c2_110st1_1,…,c2_110stn_1In determine { st2_220,st2_110_st1,st2_110_st2,...,st2_110_stnIn need excision capacitor set.
5. AVC according to claim 4 economizes the optimum allocation method economizing the idle instruction of tune in ground coordination control process based on integer programming, it is characterised in that in step (4), described soft-constraint is as follows:
(1-1c) can not causing subregion 1 idle normal transformer station reactive power constraints after the excision of subregion 1 inner capacitor, subregion 2 also has same constraint；
(1-2c) can not causing that the subregion 1 normal transformer substation voltage of voltage is out-of-limit after the excision of subregion 1 inner capacitor, subregion 2 also has same constraint；
Two above soft-constraint can be relaxed to following three constraint when optimization problem is without solution:
(1-3c) in subregion 1, the action of 220kV transformer station inner capacitor can not cause that in this subregion, 1-2 the normal transformer substation voltage of 110kV voltage is out-of-limit, and subregion 2 also has same constraint；
(1-4c) in subregion 1, the action of 110kV transformer station inner capacitor can not cause higher level 110kV idle normal transformer station reactive power constraints in its subregion, and subregion 2 also has same constraint；
(1-5c) in subregion 1, the action of 110kV transformer station inner capacitor can not cause the normal power transformation voltage out-of-limit of 1-2 35kV voltage being with in its subregion, and subregion 2 also has same constraint.
6. AVC according to claim 4 economizes the optimal decision method adjusting side reactive apparatus during ground coordination controls, it is characterised in that in step (4), described hard constraint is as follows:
(1-1d) 220kV plant stand critical point is always idle in the scope economizing tune examination；
(1-2d), while subregion 1 and subregion 2 reach the Reactive-power control target that region is total again, the Reactive Power Margin keeping setting, concrete Δ Q in subregion, are needed1> Qreserve_out_1,ΔQ2> Qreserve_out_2, wherein Qreserve_outPhysical significance be when under all end transformer stations under certain electric bus all capacitors all in excision state, if putting into the idle total variable quantity in critical point that a capacitor causes under this bus, what Δ Q represented is after final decision goes out capacitor excision, critical point is idle and difference between the idle lower limit in critical point, it is ensured that this nargin in order to when preventing nine-zone diagram from regulating the input of capacitor cause the idle adjustment vibration in critical point；
Two above hard constraint have to meet in problem solving process simultaneously, can not violate.
7. AVC according to claim 4 economizes the optimal decision method adjusting side reactive apparatus during ground coordination controls, it is characterised in that in step (4), and final decision-making capacitor set needs there are following concentration different situations at following standby set of strategies M:
Time,
Time,
Time,
Time,
Capacitor set Mn forming process is in fact the process of a recursion, wherein { cmk_1, cmk_2..., cmk_PkIt it is the spare capacitor set that goes out of decision-making, subscript k represents (k+1) individual set M (k+1), subscript pk represents the subscript of capacitor in M (k+1), in this set, 220kV substation capacitors ranked first, and 110kV capacitor is ranked up being formed according to soft-constraint and hard constraint；Mn has priority, if namelyThen final decision-making action capacitor set is Mn.
8. AVC according to claim 7 economizes the optimal decision method adjusting side reactive apparatus during ground coordination controls, it is characterised in that
The formation rule of M1 is as follows:
After first Element generation of Step1.M1, the set of formation is M1={c1_220_1Or
Select the capacitor c that in first subregion, 220kV plant stand ranks the first1_220_1, whether meet soft-constraint above and hard constraint after calculating the excision of this capacitor by sensitivity method:
◆ if soft-constraint and hard constraint, then M1={c can be met simultaneously1_220_1, terminating combinatorial enumeration process, final action capacitor is c1_220_1；
If ◆ meet soft-constraint (1-1c)-(1-2c), but be unsatisfactory for hard constraint, and the critical point idle more upper limit, then M1={c after excision1_220_1, enter the decision phase to second subregion 220kV plant stand；If being unsatisfactory for hard constraint, and the idle upper limit in critical point after excision, illustrate that this condenser capacity is improper,Enter the decision phase to second subregion 220kV plant stand；
If ◆ meet hard constraint, but be unsatisfactory for soft-constraint, after soft-constraint is relaxed further, adopt sensitivity method to verify out and meet soft-constraint (1-1c) and hard constraint (1-1d)-(1-2d), then M1={c simultaneously220_1, if being still unsatisfactory for soft-constraint (1-1c), this capacitor is failure to actuate,Enter the decision phase to second subregion 220kV plant stand；
After second Element generation of Step2.M1, the set of formation can be divided into two categories below by the quantity comprising capacitor:
One element:
M1={c1_220_1}、
Two elements:
M1={c1_220_1,c2_220_1}
M1={c in 2.1Step11_220_1}
Select the capacitor c of 220kV plant stand in Two Areas2_220_1, whether meet soft-constraint above and hard constraint after calculating the excision of this capacitor by sensitivity method:
◆ if soft-constraint and hard constraint, then M1={c can be met simultaneously1_220_1,c2_220_1, terminate combinatorial enumeration process；
If ◆ meet soft-constraint (1-3c)-(1-5c), but be unsatisfactory for hard constraint, and the critical point idle more upper limit, then M1={c after excision1_220_1,c2_220_1, enter the decision phase to second plant stand；If being unsatisfactory for hard constraint, and the idle upper limit in critical point after excision, this capacitor is failure to actuate, M1={c1_220_1, enter the decision phase to second plant stand；
If ◆ meet hard constraint, but be unsatisfactory for soft-constraint, after soft-constraint is relaxed further, adopt whether sensitivity method verification meets soft-constraint (1-3c)-(1-5c) and hard constraint simultaneously, if being still unsatisfactory for soft-constraint, this capacitor is failure to actuate, M1={c1_220_1, enter the decision phase to second plant stand；
In 2.2Step1Time
Under normal circumstances, the capacitor of configuration such as is at the rated capacity in 220kV plant stand, if thereforeThen in second subregion, the capacitor of 220kV plant stand also can not meet, after judging, the hard constraint that critical point is idle certainly, so still having after this step
After the 3rd Element generation of Step3.M1, the set of formation can be divided into two categories below by the quantity comprising capacitor:
One element of final decision:
M1={c110_st1_1, M1={c1_220_1}
Two elements:
M1={c1_220_1,c2_220_1, M1={c1_220_1,c110_st1_1}
Three elements:
M1={c1_220_1,c2_220_1,c110_st1_1}
M1={c in 2.1Step21_220_1}
Select capacitor c110_st1_1, whether meet soft-constraint above and hard constraint after calculating the excision of this capacitor by sensitivity method:
◆ if soft-constraint and hard constraint, then M1={c can be met simultaneously220_1,c110_st1_1, terminate combinatorial enumeration process；
If ◆ meet (1-3c)-(1-5c), but be unsatisfactory for hard constraint, and the critical point idle more upper limit, then M1={c after excision220_1,c110_st1_1, enter the decision phase to the 3rd plant stand；If being unsatisfactory for hard constraint, and the idle upper limit in critical point after excision, this capacitor is failure to actuate, M1={c1_220_1, enter the decision phase to the 3rd plant stand；
If ◆ meet hard constraint, but be unsatisfactory for soft-constraint, after soft-constraint is relaxed further, adopt whether sensitivity method verification meets (1-3c)-(1-5c) and hard constraint simultaneously, if being still unsatisfactory for soft-constraint, this capacitor is failure to actuate, M1={c1_220_1, enter the decision phase to the 3rd plant stand；
In 2.2Step2Time
Select capacitor C110_st1_1, whether meet soft-constraint above and hard constraint after calculating the excision of this capacitor by sensitivity method:
◆ if soft-constraint and hard constraint can be met simultaneously, excise this capacitor, M1={c110_st1_1, terminate combinatorial enumeration process；
If ◆ meet soft-constraint (1-3c)-(1-5c), but be unsatisfactory for hard constraint, and excision after critical point idle get over the upper limit, then excise this capacitor, M1={c110_st1_1, enter the decision phase to the 3rd plant stand；If being unsatisfactory for hard constraint, and the idle upper limit in critical point after excision, this capacitor is failure to actuate,Enter the decision phase to the 3rd plant stand；
◆ if meeting hard constraint, but be unsatisfactory for soft-constraint, after soft-constraint being relaxed further, adopt whether sensitivity method verification meets soft-constraint 2,3 and hard constraint simultaneously, if being still unsatisfactory for soft-constraint, this capacitor is failure to actuate,Enter the decision phase to the 3rd plant stand；
M1={c in 2.2Step31_220_1,c2_220_1Time
Select capacitor C110_st1_1, whether meet soft-constraint above and hard constraint after calculating the excision of this capacitor by sensitivity method:
◆ if soft-constraint and hard constraint can be met simultaneously, excise this capacitor, M1={c1_220_1,c2_220_1,c110_st1_1, terminate combinatorial enumeration process；
If ◆ meet soft-constraint 2,3, but be unsatisfactory for hard constraint, and excision after critical point idle get over the upper limit, then excise this capacitor, M1={c1_220_1,c2_220_1,c110_st1_1, enter the decision phase to the 3rd plant stand；If being unsatisfactory for hard constraint, and the idle upper limit in critical point after excision, this capacitor is failure to actuate, M1={c1_220_1,c2_220_1, enter the decision phase to the 3rd plant stand；
◆ if meeting hard constraint, but be unsatisfactory for soft-constraint, after soft-constraint being relaxed further, adopt whether sensitivity method verification meets soft-constraint 2,3 and hard constraint simultaneously, if being still unsatisfactory for soft-constraint, this capacitor is failure to actuate, M1={c1_220_1,c2_220_1, enter the decision phase to the 3rd plant stand；
So analyze, until the decision-making of the 7th plant stand terminates；
If the 7th plant stand decision-making goes outThen final capacitor decision set is M=M1；
If the 7th plant stand decision-making goes outThen do not consider further that the soft-constraint of the 7th 110kV plant stand, again start to do decision-making as above from first plant stand, only now only consider now to obtain M2 by hard constraint, ifM=M2；
If the 7th plant stand decision-making goes outThen do not consider further that the soft-constraint of the 7th, the 6th 110kV plant stand, again start to do decision-making as above from first plant stand, only now only consider now to obtain M3 by hard constraint, ifM=M3；
So on, until after being left out all 110kV plant stands, being left out soft-constraintThen do not consider further that 220kV plant stand and the soft-constraint of all 110kV plant stands, again start to do decision-making as above from first plant stand, only now only consider now to obtain M9 by hard constraint, consider that province adjusts the idle bound issued not too large with currently without work difference value, therefore M9 will not be empty set.
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| CN105071404A (en) * | 2015-08-14 | 2015-11-18 | 国网天津宝坻供电有限公司 | AVC strategy optimization method |
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