CN106877355B - A kind of reactive compensation adjusting method - Google Patents
A kind of reactive compensation adjusting method Download PDFInfo
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- CN106877355B CN106877355B CN201710202634.9A CN201710202634A CN106877355B CN 106877355 B CN106877355 B CN 106877355B CN 201710202634 A CN201710202634 A CN 201710202634A CN 106877355 B CN106877355 B CN 106877355B
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Classifications
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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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
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- H02J13/0017—
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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
-
- 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
- Y02E40/70—Smart grids as climate change mitigation technology in the energy generation sector
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
-
- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/22—Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
Abstract
The invention discloses a kind of reactive compensation adjusting methods, it is related to operation of power networks technical field, solves the existing method that network voltage is adjusted using Static Var Compensator, it is smaller to the adjustable range of network voltage, it is unable to satisfy the reactive compensation demand of power grid, cause the voltage's distribiuting of power grid uneven, is unable to satisfy the technical issues of power network safety operation needs.The reactive compensation adjusting method includes: the idle work optimization model for establishing reactive compensation adjusting, obtains the optimal adjustment scheme that reactive compensation is adjusted；According to the optimal adjustment scheme that reactive compensation is adjusted, reactive compensation is carried out to power grid.The present invention is adjusted applied to electric network reactive compensation.
Description
Technical field
The present invention relates to operation of power networks technical field more particularly to a kind of reactive compensation adjusting methods.
Background technique
In recent years, as in operation of power networks, high-power nonlinear-load is continuously increased, the reactive power impact and harmonic wave of power grid
Pollution is in the trend constantly risen, however when grid operation mode changes, and the shortage meeting of Reactive-power control means is so that power grid is female
The voltage of line is in a substantial change, so that the line loss that will lead to power grid increases, rate of qualified voltage reduces.
Currently, installing Static Var Compensator (Static Var often on the load node in power grid
Compensator, SVC), it needs to increase or decrease idle supply with the actual motion according to power grid, improves the voltage point of power grid
Cloth.However ever-increasing high-power nonlinear-load leads to the case where constantly rising to the reactive power impact of power grid in power grid
Under, the existing method that network voltage is adjusted using Static Var Compensator, to the adjustable range of network voltage compared with
It is small, it is unable to satisfy the reactive compensation demand of power grid, and then cause the voltage's distribiuting of power grid uneven, it is steady to be unable to satisfy power grid security
Surely the needs run.
Summary of the invention
The purpose of the present invention is to provide a kind of reactive compensation adjusting methods, for increasing the adjusting model to network voltage
It encloses, meets the needs of power network safety operation.
In order to solve the above technical problems, the present invention provides a kind of reactive compensation adjusting method, adopt the following technical scheme that
The reactive compensation adjusting method includes:
The idle work optimization model that the reactive compensation of power grid is adjusted is established, the optimal adjustment side that the reactive compensation is adjusted is obtained
Case；
According to the optimal adjustment scheme that the reactive compensation is adjusted, reactive compensation is carried out to the power grid.
Compared with prior art, reactive power compensator provided by the invention has the advantages that
In reactive compensation adjusting method provided by the invention, in the idle work optimization mould that the reactive compensation for establishing power grid is adjusted
After type, the optimal adjustment scheme that reactive compensation is adjusted can be obtained, and then according to the optimal tune according to the idle work optimization model
Section scheme carries out reactive compensation to power grid.When high-power nonlinear-load ever-increasing in power grid causes to the idle of power grid
When the case where impact constantly rises occurs, that is, above-mentioned reactive compensation adjusting method can be used, for the actual conditions of power grid, establishes
Idle work optimization model, and obtain be suitable for the power grid reactive compensation adjust optimal adjustment scheme, so as to according to this most
Excellent regulation scheme carries out reactive compensation adjusting to power grid, and then can improve network voltage distribution, improves Network Voltage Stability,
Meet the needs of power network safety operation.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, embodiment will be described below
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is the flow chart of reactive compensation adjusting method provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of reactive power compensator provided in an embodiment of the present invention；
Fig. 3 is the flow chart of the method for the operating mode of setting reactive power compensator provided in an embodiment of the present invention.
Description of symbols:
1-local reactive compensation substation, 2-distant place reactive compensation substations,
11-Static Var Compensator, 12-local switched capacitors,
13-local switching reactors, 21-distant place switched capacitors,
22-distant place switching reactors.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
The embodiment of the present invention provides a kind of reactive compensation adjusting method, specifically, as shown in Figure 1, the reactive compensation is adjusted
Method includes:
Step S1, the idle work optimization model that the reactive compensation of power grid is adjusted is established, the optimal tune that reactive compensation is adjusted is obtained
Section scheme；
Step S2, the optimal adjustment scheme adjusted according to reactive compensation carries out reactive compensation to power grid.
Illustratively, the optimal adjustment scheme adjusted according to reactive compensation, can be used reactive power compensator as shown in Figure 2
To power grid carry out reactive compensation, the reactive power compensator include: local reactive compensation substation 1 and with local reactive compensation substation 1
Connected distant place reactive compensation substation 2.Wherein, local reactive compensation substation 1 include Static Var Compensator 11, and respectively with
The connected local switched capacitor 12 of Static Var Compensator 11 and local switching reactor 13；It wraps distant place reactive compensation substation 2
The distant place switched capacitor 21 being connected respectively with Static Var Compensator 11 and distant place switching reactor 22 are included, it specifically, can root
According to the optimal adjustment scheme of reactive compensation in above-mentioned reactive power compensator, Static Var Compensator 11, local switched capacitor
12, local switching reactor 13, distant place switched capacitor 21 and distant place switching reactor 22 carry out the adjusting of switching, to power grid
Voltage be adjusted.
In reactive compensation adjusting method provided in an embodiment of the present invention, adjusted in the reactive compensation for establishing power grid idle
After Optimized model, the optimal adjustment scheme that reactive compensation is adjusted can be obtained, and then according to this according to the idle work optimization model
Optimal adjustment scheme carries out reactive compensation to power grid.When high-power nonlinear-load ever-increasing in power grid causes to power grid
Reactive power impact the case where constantly rising when occurring, that is, above-mentioned reactive compensation adjusting method can be used, for the practical feelings of power grid
Condition establishes idle work optimization model, and obtains and be suitable for the optimal adjustment scheme that the reactive compensation of the power grid is adjusted, so as to root
Reactive compensation adjusting is carried out to power grid according to the optimal adjustment scheme, and then network voltage distribution can be improved, improves network voltage
Stability meets the needs of power network safety operation.
Illustratively, it can be examined in terms of control number two of the reactive controller in electricity grid network loss and power grid
Consider, establishes above-mentioned idle work optimization model.It should be noted that " reactive controller " in the embodiment of the present invention includes above-mentioned idle
Static Var Compensator, local switched capacitor, local switching reactor, distant place switched capacitor and a distant place in control device
Switching reactor etc., those skilled in the art can be determined according to the idle control device used, and the embodiment of the present invention is to this
Without limiting.
When illustratively, from the aspect of electricity grid network loss, above-mentioned idle work optimization model can include: via net loss target
Function and constraint condition.
Via net loss objective function can be with are as follows: Min (F=PL), wherein PLFor the via net loss of power grid, by by power grid
Via net loss can make under the optimal adjustment scheme obtained according to the idle work optimization model as objective function, can not only
Enough improve network voltage distribution, improve Network Voltage Stability, realizes power network safety operation, additionally it is possible to realize the net of power grid
Network loss minimizes, and the cost of idle power network safety operation is reduced, to realize the economical operation of power grid.
Its constraint condition includes:
Wherein, i=1,2 ..., NB-1, i ≠ j, NB are in power grid
The total number of node, PGiFor the active power that generator at i-th of node exports, PDiFor the active power at i-th of node, Vi
For the voltage magnitude at i-th of node, VjFor the voltage magnitude at j-th of node, GijFor i-th of node and j-th node it
Between transmission line of electricity conductance, BijThe susceptance of transmission line of electricity between i-th of node and j-th of node, θijFor i-th of section
The head end of transmission line of electricity between point and j-th of node and the phase angle difference of tail end.
Wherein, QGiIt is defeated for generator at i-th of node
Reactive power out, QSVCiFor the reactive power of the Static Var Compensator output at i-th of node, QDiAt i-th of node
Reactive power.
PGimin≤PGi≤PGimax, wherein PGiminFor at i-th of node generator export active power minimum value,
PGimaxFor the maximum value for the active power that generator at i-th of node exports.
QGimin≤QGi≤QGimax, wherein QGiminFor at i-th of node generator export reactive power minimum value,
QGimaxFor the maximum value for the reactive power that generator at i-th of node exports.
QSVCwmin≤QSVCw≤QSVCwmax, wherein w=1,2 ..., NSVC, NSVC are Static Var Compensator in power grid
Number, QSVCwFor the reactive power of w-th of Static Var Compensator output, QSVCwminFor w-th of Static Var Compensator output
The minimum value of reactive power, QSVCwmaxFor the maximum value of the reactive power of w-th of Static Var Compensator output.
VGsmin≤VGs≤VGsmax, wherein s=1,2 ..., NG, NG are generator node total number in power grid, VGsFor s
Voltage magnitude at a generator node, VGsminFor the minimum value of the voltage magnitude at s-th of generator node, VGsmaxFor s
The maximum value of voltage magnitude at a generator node.
VDkmin≤VDk≤VDkmax, wherein k=1,2 ..., ND, ND are load node total number in power grid, VDkIt is k-th
Voltage magnitude at load node, VDkminFor the minimum value of the voltage magnitude at k-th of load node, VDkmaxIt is loaded for k-th
The maximum value of voltage magnitude at node.
Ttmin≤Tt≤Ttmax, wherein t=1,2 ..., NT, NT are the total number of transformer in power grid, TtBecome for t-th
The tap position of depressor, TtminFor the minimum value of the tap position of t-th of transformer, TtmaxFor the tap position of t-th of transformer
Maximum value.
Pijmin≤Pij≤Pijmax, wherein PijThe wattful power of transmission line of electricity between i-th of node and j-th of node
Rate, PijminThe minimum value of the active power of transmission line of electricity between i-th of node and j-th of node, PijmaxFor i-th of section
The maximum value of the active power of transmission line of electricity between point and j-th of node.
When illustratively, from the aspect of the control action number of the reactive controller in power grid, above-mentioned idle work optimization mould
Type can include: idle control action number objective function and constraint condition:
Idle control action number objective function are as follows:Wherein, NC is idle control in power grid
The total number of device, Ck0For the initial value of k-th of reactive controller, CkFor the end value of k-th of reactive controller, by will be idle
The control action number of controller can make as objective function in the optimal adjustment side obtained according to the idle work optimization model
Under case, network voltage distribution can not only be improved, improve Network Voltage Stability, realize power network safety operation, additionally it is possible to
Reduce the control action number of reactive controller, time needed for reduction carries out idle control to power grid, to realize to power grid
Fast reactive adjust.
Constraint condition corresponding to above-mentioned idle control action number objective function and above-mentioned via net loss objective function institute
Corresponding constraint condition is identical, those skilled in the art can refer to constraint condition corresponding to above-mentioned via net loss objective function into
Row setting, is no longer repeated herein.
Illustratively, in above-mentioned steps S2, after obtaining the optimal adjustment scheme that reactive compensation is adjusted, according to idle benefit
The optimal adjustment scheme for repaying adjusting, before carrying out reactive compensation to power grid, above-mentioned reactive compensation adjusting method may also include that
Step S2a, it obtains in power grid, the sensitivity that busbar voltage exports capacitive reactive power Wherein, m is the sum of capacitor in reactive power compensator, VRLocal reactive compensation substation
The bus voltage amplitude of middle Static Var Compensator,For the reactive power output of i-th of capacitor.
Step S2b, it obtains in power grid, the sensitivity that busbar voltage exports lagging reactive power Wherein, n is the sum of reactor in reactive power compensator,For k-th reactor
Reactive power output.
Step S2c, the sensitivity exported according to busbar voltage for capacitive reactive powerWith busbar voltage for inductive reactive power
The sensitivity of outputIt determines in reactive power compensator, the switching priority of capacitor and reactor.
At this point, according to the optimal adjustment scheme that reactive compensation is adjusted, carrying out reactive compensation to power grid can in above-mentioned steps S2
Include: the optimal adjustment scheme that switching priority and reactive compensation according to capacitor and reactor are adjusted, power grid is carried out
Reactive compensation, so that when carrying out Reactive-power control to power grid, on the basis of the optimal adjustment scheme that reactive compensation is adjusted,
Power grid can be also adjusted, according to the switching priority of capacitor, reactor in reactive power compensator so that at this
Under adjusting, the variation of power grid busbar voltage is more sensitive, and the reaction time is shorter, carries out reactive compensation to power grid to substantially increase
The efficiency of adjusting.
In addition, as shown in Figure 1, when using reactive power compensator as shown in Figure 2 to power grid carry out reactive compensation adjusting when,
Before the idle work optimization model for establishing reactive compensation adjusting, reactive compensation adjusting method further include:
Step S01, the local load node that the local reactive compensation substation in reactive power compensator is installed in power grid is obtained,
According to local load node, local reactive compensation substation is installed.
Step S02, a distant place for the distant place reactive compensation substation that installation is connected with local reactive compensation substation in power grid is obtained
Load node installs distant place reactive compensation substation according to distant place load node.
Step S03, reactive power compensator is initialized.
Illustratively, in above-mentioned steps S01, the local reactive compensation substation installed in reactive power compensator in power grid is obtained
Local load node the specific steps of local reactive compensation substation are installed according to local load node can include:
Step S01a, the voltage's distribiuting for the load node that i-th of needs is adjusted in power grid and the synthesis of via net loss are obtained
Evaluation index PIi, wherein i=1,2, m, m are the number for needing the load node adjusted.
Step S01b, comprehensive assessment index PI is choseniHighest load node is local load node, installs reactive compensation
Local reactive compensation substation in device.
Specifically, in above-mentioned steps S01a, the voltage's distribiuting and net of i-th of load node for needing to adjust in power grid are obtained
The comprehensive assessment index PI of network lossiSpecific steps can include:
Step S01a1, the benefited evaluation index PI of voltage at i-th of load node is obtainedLi。
Step S01a2, the benefited evaluation index PI of network loss at i-th of load node is obtainedVi。
Step S01a3, according to the benefited evaluation index PI of voltage at i-th of load nodeLiAt i-th of load node
Network loss is benefited evaluation index PIVi, obtain the comprehensive of i-th of voltage's distribiuting of load node for needing to adjust and via net loss in power grid
Close evaluation index PIi, PIi=WL×PILi+WV×PIVi, wherein WLIt is benefited weight coefficient for voltage, WVIt is benefited weight for network loss
Coefficient.
Wherein, in above-mentioned steps S01a1, the benefited evaluation index PI of voltage at i-th of load node is obtainedLiSpecific step
Suddenly include:
Obtain the benefited factor LBF of voltage at i-th of load nodei,Wherein,
PL0The via net loss of power grid, Q when not install local reactive compensation substationsiFor the local reactive compensation at i-th of load node
The reactive power of substation output, PL(Qsi) it is that the reactive power that the local reactive compensation substation at i-th of load node exports is
QsiWhen, the via net loss of power grid.
According to the benefited factor LBF of voltage at i-th of load nodei, obtain i-th of load node at voltage be benefited comment
Estimate index PILi,
In above-mentioned steps S01a2, the benefited evaluation index PI of network loss at i-th of load node is obtainedViSpecific steps packet
It includes:
Obtain the benefited factor Ⅴ BF of network loss at i-th of load nodei,Its
In, Vi0When not install local reactive compensation substation, voltage magnitude at i-th of load node, QsiFor i-th of load node
The reactive power of the local reactive compensation substation output at place, Vi(Qsi) it is local reactive compensation substation at i-th load node
The reactive power of output is QsiWhen, the voltage magnitude at i-th of load node；
According to the benefited factor Ⅴ BF of network loss at i-th of load nodei, obtain i-th of load node at network loss be benefited comment
Estimate index PIVi,
Illustratively, in above-mentioned steps S02, it is idle to obtain the distant place that installation is connected with local reactive compensation substation in power grid
The distant place load node for compensating substation installs the specific steps of distant place reactive compensation substation according to distant place load node can include:
Electrical distance in S02a, acquisition power grid between j-th of spare distant place load node and local load node,
In, i=1,2, n, n are the number of spare distant place load node.
If S02b, acquisition are at j-th of spare distant place load node installation distant place reactive compensation substation, local load node
The value added Δ Q of the reactive power of the local reactive compensation substation output at placesij, Δ Qsij=Qsij-Qsi(0), wherein QsijFor
Local reactive compensation when j-th of spare distant place load node installation distant place reactive compensation substation, at local load node
The reactive power of substation output, Qsi(0) for when being fitted without distant place reactive compensation substation, the local at local load node is idle
Compensate the reactive power of substation output.
If S02c, acquisition, at j-th of spare distant place load node installation distant place reactive compensation substation, j-th spare remote
The variation delta V of voltage magnitude at square load nodej, Δ Vj=Vj'-Vj(0), wherein Vj' it is negative in j-th of spare distant place
After carrying node installation distant place reactive compensation substation, the voltage magnitude at j-th of spare distant place load node, Vj(0) for
Before j-th of spare distant place load node installation distant place reactive compensation substation, the voltage amplitude at j-th of spare distant place load node
Value.
S02d, according to the electrical distance, standby at j-th between j-th of spare distant place load node and local load node
When reactive compensation substation in a distant place being installed with distant place load node, the nothing of the local reactive compensation substation output at local load node
The value added Δ Q of function powersij, and at j-th of spare distant place load node installation distant place reactive compensation substation, j-th of institute
State the variation delta V of the voltage magnitude at spare distant place load nodej, obtain power grid in install reactive power compensator in local
The distant place load node of the connected distant place reactive compensation substation in reactive compensation substation, installs distant place reactive compensation substation.
Illustratively, in above-mentioned steps S03, the specific steps for initializing reactive power compensator include: setting reactive compensation
The operating mode of device.
Specifically, the operating mode of the reactive power compensator can include: voltage mode control and Reactive Power Control mode.
Illustratively, as shown in figure 3, the operating mode of above-mentioned setting reactive power compensator method particularly includes:
Step S031, a distant place is electric in the voltage signal and reactive power signals and power grid of local power grid in acquisition power grid
The voltage signal and reactive power signals of net.
Step S032, when the voltage signal of the voltage signal of the local power grid of acquisition and/or distant place power grid does not meet in advance
When the voltage setting value of setting, then voltage mode control may be selected, pass through the local reactive compensation substation in reactive power compensator
With distant place reactive compensation substation, local power grid voltage and/or distant place network voltage are adjusted, so that local power grid voltage and distant place electricity
Net voltage meets voltage setting value.
Step S033, when the reactive power signals of the local power grid of acquisition and/or the reactive power signals of distant place power grid not
When meeting preset reactive power setting value, then Reactive Power Control mode may be selected, by reactive power compensator
Local reactive compensation substation and distant place reactive compensation substation adjust local power grid reactive power and/or distant place power system reactive power,
So that local power grid reactive power and distant place power system reactive power meet reactive power setting value.
Also, in the adjustment process for stating reactive power compensator in use, which can also be according to power grid
Practical operation situation, automatic conversion operating mode, and then reasonable reactive compensation can be carried out to local power grid and distant place power grid,
Ensure the stable operation of entire power grid.Specifically, reactive power compensator is stated in use to carry out in reactive compensation adjustment process, if
When local power grid voltage and/or the less than afc voltage setting value of distant place network voltage, then the reactive power compensator can be by built-in
Mode switch automatically select voltage mode control, and export corresponding voltage adjustment instruction, and work as the idle function of local power grid
When rate and/or distant place power system reactive power do not meet reactive power setting value, which also can be by built-in
Mode switch automatically selects idle control model, and exports corresponding idle adjustment instruction.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (9)
1. a kind of reactive compensation adjusting method characterized by comprising
The idle work optimization model that the reactive compensation of power grid is adjusted is established, the optimal adjustment scheme that the reactive compensation is adjusted is obtained；
According to the optimal adjustment scheme that the reactive compensation is adjusted, reactive compensation is carried out to the power grid；
After obtaining the optimal adjustment scheme that the reactive compensation is adjusted, according to the optimal adjustment side of reactive compensation adjusting
Case, before carrying out reactive compensation to the power grid, the reactive compensation adjusting method further include:
It obtains in the power grid, the sensitivity that busbar voltage exports capacitive reactive power Wherein, m is the sum of capacitor in reactive power compensator, VRFor local reactive compensation
The bus voltage amplitude of Static Var Compensator in standing,For the reactive power output of i-th of capacitor；
It obtains in the power grid, the sensitivity that busbar voltage exports lagging reactive power Wherein, n is the sum of reactor in the reactive power compensator,Described in k-th
The reactive power of reactor exports；
The sensitivity exported according to the busbar voltage for capacitive reactive powerInductive reactive power is exported with the busbar voltage
SensitivityIt determines in the reactive power compensator, the switching priority of the capacitor and the reactor；
The optimal adjustment scheme adjusted according to the reactive compensation, carrying out reactive compensation to the power grid includes: according to institute
The optimal adjustment scheme that the switching priority and the reactive compensation for stating capacitor and the reactor are adjusted, to the electricity
Net carries out reactive compensation.
2. reactive compensation adjusting method according to claim 1, which is characterized in that the idle work optimization model includes: net
Network shrink goals function and constraint condition；
The via net loss objective function are as follows: Min (F=PL), wherein PLFor the via net loss of the power grid；
The constraint condition includes:
Wherein, i=1,2 ..., NB-1, i ≠ j, NB are power grid interior joint
Total number, PGiFor the active power that generator at i-th of node exports, PDiFor the active power at i-th of node, ViIt is
Voltage magnitude at i node, VjFor the voltage magnitude at j-th of node, GijBetween i-th of node and j-th of node
The conductance of transmission line of electricity, BijThe susceptance of transmission line of electricity between i-th of node and j-th of node, θijFor i-th node with
The head end of transmission line of electricity between j-th of node and the phase angle difference of tail end；
Wherein, QGiIt is exported for generator at i-th of node
Reactive power, QSVCiFor the reactive power of the Static Var Compensator output at i-th of node, QDiFor the nothing at i-th of node
Function power；
PGimin≤PGi≤PGimax, wherein PGiminFor the minimum value for the active power that generator at i-th of node exports, PGimaxFor
The maximum value for the active power that generator exports at i-th of node；
QGimin≤QGi≤QGimax, wherein QGiminFor the minimum value for the reactive power that generator at i-th of node exports, QGimaxFor
The maximum value for the reactive power that generator exports at i-th of node；
QSVCwmin≤QSVCw≤QSVCwmax, wherein w=1,2 ..., NSVC, NSVC are Static Var Compensator in the power grid
Number, QSVCwFor the reactive power of w-th of the Static Var Compensator output, QSVCwminFor w-th of static reactive
The minimum value of the reactive power of device output, QSVCwmaxFor the maximum of the reactive power of w-th of the Static Var Compensator output
Value；
VGsmin≤VGs≤VGsmax, wherein s=1,2 ..., NG, NG are generator node total number in the power grid, VGsFor s
Voltage magnitude at a generator node, VGsminFor the minimum value of the voltage magnitude at s-th of generator node, VGsmaxFor s
The maximum value of voltage magnitude at a generator node；
VDkmin≤VDk≤VDkmax, wherein k=1,2 ..., ND, ND are load node total number in the power grid, VDkIt is k-th
Voltage magnitude at load node, VDkminFor the minimum value of the voltage magnitude at k-th of load node, VDkmaxIt is loaded for k-th
The maximum value of voltage magnitude at node；
Ttmin≤Tt≤Ttmax, wherein t=1,2 ..., NT, NT are the total number of transformer in the power grid, TtBecome for t-th
The tap position of depressor, TtminFor the minimum value of the tap position of t-th of transformer, TtmaxFor the tap position of t-th of transformer
Maximum value；
Pijmin≤Pij≤Pijmax, wherein PijThe active power of transmission line of electricity between i-th of node and j-th of node,
PijminThe minimum value of the active power of transmission line of electricity between i-th of node and j-th of node, PijmaxFor i-th node with
The maximum value of the active power of transmission line of electricity between j-th of node.
3. reactive compensation adjusting method according to claim 1, which is characterized in that the idle work optimization model includes: nothing
Function control action number objective function and constraint condition；
The idle control action number objective function are as follows:Wherein, NC is idle in the power grid
The total number of controller, Ck0For the initial value of k-th of reactive controller, CkFor the end value of k-th of reactive controller；
The constraint condition includes:
Wherein, i=1,2 ..., NB-1, i ≠ j, NB are power grid interior joint
Total number, PGiFor the active power that generator at i-th of node exports, PDiFor the active power at i-th of node, ViIt is
Voltage magnitude at i node, VjFor the voltage magnitude at j-th of node, GijBetween i-th of node and j-th of node
The conductance of transmission line of electricity, BijThe susceptance of transmission line of electricity between i-th of node and j-th of node, θijFor i-th node with
The head end of transmission line of electricity between j-th of node and the phase angle difference of tail end；
Wherein, QGiIt is exported for generator at i-th of node
Reactive power, QSVCiFor the reactive power of the Static Var Compensator output at i-th of node, QDiFor the nothing at i-th of node
Function power；
PGimin≤PGi≤PGimax, wherein PGiminFor the minimum value for the active power that generator at i-th of node exports, PGimaxFor
The maximum value for the active power that generator exports at i-th of node；
QGimin≤QGi≤QGimax, wherein QGiminFor the minimum value for the reactive power that generator at i-th of node exports, QGimaxFor
The maximum value for the reactive power that generator exports at i-th of node；
QSVCwmin≤QSVCw≤QSVCwmax, wherein w=1,2 ..., NSVC, NSVC are Static Var Compensator in the power grid
Number, QSVCwFor the reactive power of w-th of the Static Var Compensator output, QSVCwminFor w-th of static reactive
The minimum value of the reactive power of device output, QSVCwmaxFor the maximum of the reactive power of w-th of the Static Var Compensator output
Value；
VGsmin≤VGs≤VGsmax, wherein s=1,2 ..., NG, NG are generator node total number in the power grid, VGsFor s
Voltage magnitude at a generator node, VGsminFor the minimum value of the voltage magnitude at s-th of generator node, VGsmaxFor s
The maximum value of voltage magnitude at a generator node；
VDkmin≤VDk≤VDkmax, wherein k=1,2 ..., ND, ND are load node total number in the power grid, VDkIt is k-th
Voltage magnitude at load node, VDkminFor the minimum value of the voltage magnitude at k-th of load node, VDkmaxIt is loaded for k-th
The maximum value of voltage magnitude at node；
Ttmin≤Tt≤Ttmax, wherein t=1,2 ..., NT, NT are the total number of transformer in the power grid, TtBecome for t-th
The tap position of depressor, TtminFor the minimum value of the tap position of t-th of transformer, TtmaxFor the tap position of t-th of transformer
Maximum value；
Pijmin≤Pij≤Pijmax, wherein PijThe active power of transmission line of electricity between i-th of node and j-th of node,
PijminThe minimum value of the active power of transmission line of electricity between i-th of node and j-th of node, PijmaxFor i-th node with
The maximum value of the active power of transmission line of electricity between j-th of node.
4. reactive compensation adjusting method according to claim 1, which is characterized in that the nothing for establishing reactive compensation adjusting
Before function Optimized model, the reactive compensation adjusting method further include:
The local load node that the local reactive compensation substation in reactive power compensator is installed in power grid is obtained, according to the local
Load node installs the local reactive compensation substation；
Obtain the distant place load that the distant place reactive compensation substation being connected with the local reactive compensation substation is installed in the power grid
Node installs distant place reactive compensation substation according to the distant place load node；
Initialize the reactive power compensator.
5. reactive compensation adjusting method according to claim 4, which is characterized in that install idle benefit in the acquisition power grid
The local load node for repaying the local reactive compensation substation in device installs the local nothing according to the local load node
Function compensation substation specific steps include:
Obtain the voltage's distribiuting for the load node that i-th of needs is adjusted in power grid and the comprehensive assessment index of via net loss, wherein
I=1,2, m, m are the number for needing the load node adjusted；
The highest load node of the comprehensive assessment index is chosen as local load node, the reactive power compensator is installed
In local reactive compensation substation.
6. reactive compensation adjusting method according to claim 5, which is characterized in that i-th of needs in the acquisition power grid
The specific steps of the comprehensive assessment index of the voltage's distribiuting and via net loss of the load node of adjusting include:
Obtain the benefited evaluation index PI of voltage at i-th of load nodeLi；
Obtain the benefited evaluation index PI of network loss at i-th of load nodeVi；
According to the benefited evaluation index PI of voltage at i-th of load nodeLiWith the network loss at i-th of load node by
Beneficial evaluation index PIVi, obtain the comprehensive assessment of the voltage's distribiuting and via net loss of i-th of load node for needing to adjust in power grid
Index PIi, PIi=WL×PILi+WV×PIVi, wherein WLIt is benefited weight coefficient for voltage, WVIt is benefited weight coefficient for network loss.
7. reactive compensation adjusting method according to claim 6, which is characterized in that described to obtain i-th of load section
The benefited evaluation index PI of voltage at pointLiSpecific steps include:
Obtain the benefited factor LBF of voltage at i-th of load nodei,Wherein,
PL0The via net loss of power grid, Q when not install the local reactive compensation substationsiDescribed at i-th of load node
The reactive power of local reactive compensation substation output, PL(Qsi) it is the local reactive compensation at i-th load node
The reactive power of substation output is QsiWhen, the via net loss of power grid；
According to the benefited factor LBF of voltage at described i-th load nodei, obtain the electricity at i-th of load node
Press the evaluation index PI that is benefitedLi,
8. reactive compensation adjusting method according to claim 6, which is characterized in that described to obtain i-th of load section
The benefited evaluation index PI of network loss at pointViSpecific steps include:
Obtain the benefited factor Ⅴ BF of network loss at i-th of load nodei,Its
In, Vi0When not install the local reactive compensation substation, voltage magnitude at i-th of load node, QsiIt is i-th
The reactive power of the local reactive compensation substation output at the load node, Vi(Qsi) it is i-th of load node
The reactive power of the local reactive compensation substation output at place is QsiWhen, the voltage magnitude at i-th of load node；
According to the benefited factor Ⅴ BF of network loss at described i-th load nodei, obtain the net at i-th of load node
Damage the evaluation index PI that is benefitedVi,
9. reactive compensation adjusting method according to claim 4, which is characterized in that obtain in the power grid installation with it is described
The distant place load node of the connected distant place reactive compensation substation in local reactive compensation substation, according to the distant place load node, peace
The specific steps for filling distant place reactive compensation substation include:
Obtain the electrical distance in power grid between j-th of spare distant place load node and the local load node, wherein i=
1,2, n, n are the number of spare distant place load node；
If obtaining the local load when j-th of spare distant place load node installs the distant place reactive compensation substation
The value added △ Q of the reactive power of the local reactive compensation substation output at nodesij, △ Qsij=Qsij-Qsi(0),
In, QsijFor when j-th of spare distant place load node installs the distant place reactive compensation substation, the local load is saved
The reactive power of the local reactive compensation substation output at point, QsiIt (0) is to be fitted without distant place reactive compensation substation
When, the reactive power of the local reactive compensation substation output at the local load node；
If obtaining when j-th of spare distant place load node installs the distant place reactive compensation substation, described in described j-th
The variable quantity △ V of voltage magnitude at spare distant place load nodej, △ Vj=Vj'-Vj(0), wherein Vj' for described in j-th
Behind spare distant place load node installation distant place reactive compensation substation, at j-th of spare distant place load node
Voltage magnitude, VjIt (0) is the jth before j-th of spare distant place load node installs distant place reactive compensation substation
Voltage magnitude at a spare distant place load node；
According between described j-th spare distant place load node and the local load node electrical distance, described in j-th
The idle benefit in local when spare distant place load node installs the distant place reactive compensation substation, at the local load node
Repay the value added △ Q of the reactive power of substation outputsij, and in j-th of spare distant place load node installation distant place
When reactive compensation substation, the variable quantity △ V of the voltage magnitude at j-th of spare distant place load nodej, described in acquisition
The remote of the distant place reactive compensation substation being connected in the reactive power compensator with the local reactive compensation substation is installed in power grid
Square load node installs distant place reactive compensation substation.
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