CN105429151B - A kind of transformer station's VQC control methods for considering side voltage security in becoming - Google Patents

A kind of transformer station's VQC control methods for considering side voltage security in becoming Download PDF

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Publication number
CN105429151B
CN105429151B CN201510971022.7A CN201510971022A CN105429151B CN 105429151 B CN105429151 B CN 105429151B CN 201510971022 A CN201510971022 A CN 201510971022A CN 105429151 B CN105429151 B CN 105429151B
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main
strategy
lmin
lmax
hmin
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CN105429151A (en
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张勇军
孙舒逸
羿应棋
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South China University of Technology SCUT
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South China University of Technology SCUT
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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
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Electrical Variables (AREA)

Abstract

The present invention provides a kind of transformer station's VQC control methods of side voltage security during consideration becomes, to solve the problems, such as that three-winding transformer medium voltage side busbar voltage, which can not be effectively ensured, according to the area's figure progress transformer station VQC controls of tradition 17 at present is located at safe range.It is concretely comprised the following steps：First, three-winding transformer operational factor and low-pressure side reactive-load compensation configuration state are gathered；Next, setting main transformer critical point is idle and the boundary condition of low-pressure side bus voltage, calculates side bus voltage margin of safety in becoming；Finally, the barring condition of main distribution network and reactive-load compensation equipment is set, and main distribution network regulation and reactive-load compensation equipment switching are carried out according to the predetermined policy under various boundary.The present invention has taken into account the security of main transformer medium voltage side busbar voltage, the pressure regulation pressure of lower floor's power network when alleviating load peak while three-winding transformer high-pressure side reactive power in ensureing transformer station and low-pressure side bus voltage are located in zone of reasonableness.

Description

A kind of transformer station's VQC control methods for considering side voltage security in becoming
Technical field
It is more particularly to a kind of to consider side electricity in becoming the present invention relates to transformer station's VQC control methods containing three-winding transformer Press transformer station's VQC control methods of security.
Background technology
As operation of power networks scale constantly expands, the control complexity to operation of power networks state is also constantly lifted, and is full Sufficient user is the requirements at the higher level of the quality of power supply, it is necessary to realize significantly more efficient coordination different voltage class power networks and coordinate.
Transforming plant voltage reactive controls (VQC) device mainly by adjusting load tap changer gear and reactive-load compensation equipment Switching, makes main transformer critical point idle and busbar voltage is located in desired extent, is the important method for ensureing reliability of electric power.
Transformer station typically carries out main distribution network regulation using 17 area's figure VQC control methods at present and reactive-load compensation equipment is thrown Cut, three-winding transformer medium voltage side busbar voltage safety can not be effectively ensured, especially when the whole network load peak, easily because of action Strategy it is unreasonable and cause main transformer become in side bus voltage it is relatively low in addition more lower limit the problem of, and for three-winding transformer and Speech, its become in side bus generally as lower floor's power network root node, if its voltage level it is too low can be brought to lower floor's power network it is huge Big pressure regulation pressure, it is unfavorable for the safe and stable operation of power network.
The present invention is effectively differentiated in main transformer by rationally setting three-winding transformer medium voltage side busbar voltage margin of safety Press side bus voltage whether relatively low, propose the VQC control methods based on 20 area's figures for low voltage situation to avoid because of master Caused main transformer medium voltage side busbar voltage is relatively low or even more Lower Boundary, and ensure it after distribution network or reactive-load compensation equipment action Voltage possesses the regulation nargin of abundance.Coordinate traditional 17 area's figure VQC control methods, ensureing that three-winding transformer critical point is idle With low-pressure side bus voltage it is qualified under conditions of, by main transformer medium voltage side busbar voltage control in the reasonable scope, alleviate load The pressure regulation pressure of lower floor's power network during peak.
The content of the invention
It is an object of the invention to solve not being effectively ensured according to the area's figure progress transformer station VQC controls of tradition 17 at present The problem of three-winding transformer medium voltage side busbar voltage is safe, propose a kind of transformer station VQC for considering side voltage security in becoming Control method, concrete technical scheme are as follows.
A kind of transformer station's VQC control methods for considering side voltage security in becoming, comprise the following steps：
(1) the current idle Q in critical point of three-winding transformer is gatheredH, main transformer medium voltage side busbar voltage VM, main transformer low-pressure side it is female Line voltage VL, main transformer low-pressure side reactive-load compensation equipment switching and main distribution network information, wherein QHIt is defined as sending nothing under main transformer high-pressure side Work(power, QHJust to represent to send reactive power, Q under to lower floor's power networkHFor negative indication reactive power is sent to upper strata power network；
(2) Q is setHUpper and lower limit QHmax、QHmin, VMLower limit VMmin, VLUpper and lower limit VLmax、VLmin；
(3) main transformer medium voltage side busbar voltage margin of safety V is calculateds；
(4) it is locking after gear shift once to set main distribution network barring condition, sets reactive-load compensation equipment switching barring condition To put into or cutting off reverse locking after one group of reactive-load compensation equipment；
(5) main distribution network regulation and reactive-load compensation equipment switching are carried out by main strategy, if the corresponding main distribution network of main strategy or Reactive-load compensation equipment is in blocking and uses standby strategy：
Work as VM≥VsWhen, carry out main distribution network regulation according to the area's figure VQC control methods of tradition 17 and thrown with reactive-load compensation equipment Cut；
Work as VM＜ VsWhen, carry out main distribution network regulation and reactive-load compensation equipment switching according to 20 area's figure VQC control methods.
Further, each boundary value can be set according to practical operating experiences in described step (2).
Further, the main transformer medium voltage side busbar voltage margin of safety V in described step (3)sIt can be obtained by formula (1) ：
Comprising variable in formula (1)：Three-winding transformer is kept off away from d；The lower limit V of main transformer medium voltage side busbar voltageMmin；In main transformer Press side rated voltage V2N；The margin of safety Δ V of main transformer medium voltage side busbar voltageδ.Wherein, Δ VδIt is characterized as preventing main transformer medium voltage side The relatively low default nargin of busbar voltage, its value are configured according to main transformer medium voltage side busbar voltage security requirement； It is approximately equal to V caused by the gear of regulation oneMMaximum variable quantity.VsTo differentiate VMIt is whether relatively low, it is 17 area's figures of selection or 20 area's figures The foundation of control strategy.
Further, the reverse locking of reactive-load compensation equipment switching refers in described step (4)：In same transformer station Capacitor or reactor only allow one direction to act in single regulation, i.e., only carry out putting into operation or only carry out excision operation, And after the completion of regulation and control its opposite direction of locking action for a period of time.
Further, the area's figure VQC control methods of tradition 17 in described step (5) refer to Fig. 2, according to QHAnd VLNo 17 regions are divided into boundary condition, and main distribution network regulation and reactive-load compensation throwing are carried out according to the predetermined policy in respective region Cut, specific implementation method is：
If QH＜ QHminAnd VL＞ VLmax, main strategy is set to cut capacitor, and standby strategy is depressured (region 1) for upshift；
If QHmin＜ QH＜ QHmin+ΔQHtAnd VL＞ VLmax, main strategy is set to cut capacitor, and standby strategy drops for upshift Press in (region 2)；
If QHmin+ΔQHt＜ QH＜ QHmax-ΔQHqAnd VL＞ VLmax, set main strategy and be depressured for upshift or cut capacitor, it is standby With strategy (region 3) is depressured to cut capacitor or upshift；
If QHmax-ΔQHq＜ QH＜ QHmaxAnd VL＞ VLmax, the main strategy of setting is upshift decompression, and standby strategy is to cut electric capacity Device (region 4)；
If QH＞ QHmaxAnd VL＞ VLmax, the main strategy of setting is upshift decompression, and standby strategy is to cut capacitor (region 5)；
If QH＜ QHminAnd VLmax-ΔVLt＜ VL＜ VLmax, main strategy is set to cut capacitor, and standby strategy is to be failure to actuate (region 6)；
If QH＞ QHmaxAnd VLmax-ΔVLq＜ VL＜ VLmax, the main strategy of setting is upshift decompression, and standby strategy is to be failure to actuate (region 7)；
If QH＜ QHminAnd VLmin+ΔVLq＜ VL＜ VLmax-ΔVLt, main strategy is set to cut capacitor, and standby strategy is not Act in (region 8)；
If QHmin＜ QH＜ QHmaxAnd VLmin＜ VL＜ VLmax, setting is main tactful and standby strategy be failure to actuate (region 9, Qualified region)；
If QH＞ QHmaxAnd VLmin+ΔVLt＜ VL＜ VLmax-ΔVLq, main strategy is set to throw capacitor, and standby strategy is not Act in (region 10)；
If QH＜ QHminAnd VLmin＜ VL＜ VLmin+ΔVLq, the main strategy of setting is downshift boosting, and standby strategy is to be failure to actuate (region 11)；
If QH＞ QHmaxAnd VLmin＜ VL＜ VLmin+ΔVLt, for the main strategy of setting to throw capacitor, standby strategy is to be failure to actuate (region 12)；
If QH＜ QHminAnd VL＜ VLmin, the main strategy of setting is downshift boosting, and standby strategy is to throw electric capacity (region 13)；
If QHmin＜ QH＜ QHmin+ΔQHqAnd VL＜ VLmin, the main strategy of setting is downshift boosting, and standby strategy is to throw electric capacity Device (region 14)；
If QHmin+ΔQHq＜ QH＜ QHmax-ΔQHtAnd VL＜ VLmin, set main strategy and boost or throw capacitor for downshift, it is standby It is to throw capacitor or downshift boosting (region 15) with strategy；
If QHmax-ΔQHt＜ QH＜ QHmaxAnd VL＜ VLmin, main strategy is set to throw capacitor, and standby strategy is downshift liter Press in (region 16)；
If QH＞ QHmaxAnd VL＜ VLmin, main strategy is set to throw capacitor, and standby strategy boosts (region 17) for downshift.
Wherein, Δ VLtBased on become high-pressure side regulation one gear caused by VLMaximum variable quantity, Δ VLqFor the group capacitor of switching one Caused VLMaximum variable quantity, Δ QHtBased on become high-pressure side regulation one gear caused by QHMaximum variable quantity, Δ QHqFor one group of switching Q caused by capacitorHMaximum variable quantity.
Further, 20 area's figure VQC control methods in described step (5) refer to Fig. 3, according to QHAnd VLDifferent edge Boundary's condition is divided into 20 regions, and carries out main distribution network regulation and reactive compensation switching according to the predetermined policy in respective region；
20 area's figure VQC control methods are further by the region 9 (qualified region) in traditional 17 area's figure VQC control methods It is divided into region 9,18,19,20, its main purpose is for VMMore regulation nargin are provided；The boundary condition in other regions with Traditional 17 area's figure VQC control methods are identical, but the control strategy in each region is varied from, and its main purpose is to avoid three winding Transformer is due to VMIt is relatively low to cause voltage after acting to get over lower limit.The specific implementation method of 20 area's figure VQC control methods is：
If VL＞ VLmax, main strategy is set to cut capacitor, and standby strategy is to be failure to actuate in (region 1,2,3,4,5)；
If QH＜ QHminAnd VLmax-ΔVLt＜ VL＜ VLmax, main strategy is set to cut capacitor, and standby strategy is to be failure to actuate (region 6)；
If QH＞ QHmaxAnd VLmax-ΔVLq＜ VL＜ VLmax, it is be failure to actuate (region 7) to set main tactful and standby strategy；
If QH＜ QHminAnd VLmin+ΔVLq＜ VL＜ VLmax-ΔVLt, the main strategy of setting is downshift boosting, and standby strategy is to cut Capacitor (region 8)；
If QHmin＜ QH＜ QHmin+ΔQHqAnd VLmax-ΔVLt＜ VL＜ VLmaxOr QHmin+ΔQHq＜ QH＜ QHmaxAnd VLmax- ΔVLq＜ VL＜ VLmax, it is be failure to actuate (region 9, qualified region) to set main tactful and standby strategy；
If QH＞ QHmaxAnd VLmin+ΔVLt＜ VL＜ VLmax-ΔVLq, main strategy is set to throw capacitor, and standby strategy is not Act in (region 10)；
If QH＜ QHminAnd VLmin＜ VL＜ VLmin+ΔVLq, the main strategy of setting is downshift boosting, and standby strategy is to be failure to actuate (region 11)；
If QH＞ QHmaxAnd VLmin＜ VL＜ VLmin+ΔVLt, for the main strategy of setting to throw capacitor, standby strategy is to be failure to actuate (region 12)；
If QH＜ QHminAnd VL＜ VLmin, the main strategy of setting is downshift boosting, and standby strategy is to throw electric capacity (region 13)；
If QHmin＜ QH＜ QHmin+ΔQHqAnd VL＜ VLmin, the main strategy of setting is downshift boosting, and standby strategy is to throw electric capacity Device (region 14)；
If QHmin+ΔQHq＜ QH＜ QHmax-ΔQHtAnd VL＜ VLmin, set main strategy and boost or throw capacitor for downshift, it is standby It is to throw capacitor or downshift boosting (region 15) with strategy；
If QHmax-ΔQHt＜ QH＜ QHmaxAnd VL＜ VLmin, main strategy is set to throw capacitor, and standby strategy is downshift liter Press in (region 16)；
If QH＞ QHmaxAnd VL＜ VLmin, main strategy is set to throw capacitor, and standby strategy boosts (region 17) for downshift；
If QHmin＜ QH＜ QHmax-ΔQHtAnd VLmin＜ VL＜ VLmax-ΔVLt, set main strategy and boosted for downshift, standby plan Slightly it is failure to actuate in (region 18)；
If QHmin+ΔQHq＜ QH＜ QHmaxAnd VLmin＜ VL＜ VLmax-ΔVLq, it is head capacitor to set main strategy, standby plan Slightly it is failure to actuate in (region 19)；
If QHmin+ΔQHq＜ QH＜ QH＜ QHmax-ΔQHtAnd VLmin＜ VL＜ VLmax-ΔVLt, it is downshift liter to set main strategy Pressure throws capacitor, and standby strategy boosts (region 20) to throw capacitor or downshift.
Compared with prior art, the invention has the advantages that：
(1) three-winding transformer high-pressure side reactive power and low-pressure side bus voltage are located at reasonable model in transformer station is ensured The security of main transformer medium voltage side busbar voltage is taken into account while enclosing interior, the pressure regulation pressure of lower floor's power network when alleviating load peak Power；
(2) rational barring condition is set to avoid the frequent throwing of the frequent movement of transformer gear and reactive-load compensation equipment Cut, lift the reliability of Operation of Electric Systems.
Brief description of the drawings
A kind of flow charts for considering transformer station's VQC control methods of side voltage security in becoming of Fig. 1.
Fig. 2 is traditional 17 area's figure VQC control method region division schematic diagrames.
Fig. 3 is 20 area's figure VQC control method region division schematic diagrames.
Fig. 4 a, Fig. 4 b are two kinds of actual motion views of certain three-winding transformer.
Fig. 5 is the action schematic diagram by 20 area's figure VQC control methods.
Fig. 6 is the action schematic diagram by traditional 17 area's figure VQC control methods.
Embodiment
It is described further below in conjunction with the specific implementation of accompanying drawing and example to the present invention, but the implementation and protection of the present invention Not limited to this.
Such as Fig. 1, a kind of transformer station's VQC control methods for considering side voltage security in becoming, comprise the following steps：
(1) the current idle Q in critical point of three-winding transformer is gatheredH, main transformer medium voltage side busbar voltage VM, main transformer low-pressure side it is female Line voltage VL, main transformer low-pressure side reactive-load compensation equipment switching and main distribution network information, wherein QHIt is defined as sending nothing under main transformer high-pressure side Work(power, QHJust to represent to send reactive power, Q under to lower floor's power networkHFor negative indication reactive power is sent to upper strata power network；
(2) Q is setHUpper and lower limit QHmax、QHmin, VMLower limit VMmin, VLUpper and lower limit VLmax、VLmin；
(3) main transformer medium voltage side busbar voltage margin of safety V is calculateds, its value can obtain by following formula:
(4) it is locking after gear shift once to set main distribution network barring condition, sets reactive-load compensation equipment switching barring condition To put into or cutting off reverse locking after one group of reactive-load compensation equipment；
(5) main distribution network regulation and reactive-load compensation equipment switching are carried out by main strategy, if the corresponding main distribution network of main strategy or Reactive-load compensation equipment is in blocking and uses standby strategy：
Work as VM≥VsWhen, carry out main distribution network regulation according to the area's figure VQC control methods of tradition 17 and thrown with reactive-load compensation equipment Cut；
Work as VM＜ VsWhen, carry out main distribution network regulation and reactive-load compensation equipment switching according to 20 area's figure VQC control methods.
It is an example of calculation of the inventive method below, by taking the actual motion state of certain three-winding transformer as an example, figure 4a, Fig. 4 b show two kinds of actual motion states of the transformer, are designated as state A1 and state B1 respectively.
(1) the idle Q in critical point of three-winding transformer under two kinds of running statuses is gatheredH, main transformer medium voltage side busbar voltage VM, it is main Low pressure side busbar voltage VL, the operational factor under two kinds of running statuses is as shown in table 1.Main transformer low-pressure side input capacitor is as schemed Shown in 4, main transformer no-load voltage ratio is 220 ± 8 × 1.5%/115/10.5kV and high-pressure side tap is respectively positioned on 16 gears；
Primary operating parameter under 1 two kinds of running statuses of table
Running status QH/Mvar VL/kV VM/kV
State A1 0.48 10.69 111.01
State B1 11.08 10.29 109.90
(2) Q is setHUpper and lower limit QHmax=10Mvar, QHmin=-10Mvar, VMLower limit VMmin=110kV, VL's Upper and lower limit VLmax=10.6kV, VLmin=10.1kV；
(3) main transformer medium voltage side busbar voltage margin of safety V is calculateds, its value can obtain by following formula:
(4) it is locking after gear shift once to set main distribution network barring condition, sets reactive-load compensation equipment switching barring condition To put into or cutting off reverse locking after one group of reactive-load compensation equipment；
(5) due to being satisfied by condition V under two kinds of running statusesM＜ Vs, therefore carried out using 20 area's figure VQC control methods Main distribution network adjusts and reactive-load compensation equipment switching, and sets Δ QHq=10Mvar, Δ QHt=1Mvar, Δ VLt=0.15kV, ΔVLq=0.13kV.
To state A1：Refering to Fig. 5, three-winding transformer running status A1 is in the corresponding master of the area's figure of region 4,20 before action Strategy is to cut capacitor.It is 8Mvar capacitor and reverse locking by one pool-size of main strategy excision is controlled, main transformer is transported after action Row state A2 is in region 9, release.
Refering to Fig. 6, under the same terms, according to traditional 17 area's figure VQC control methods, three-winding transformer is transported before action Row state A1 is in the area's figure of region 4,17 and corresponds to main strategy as upshift decompression.It is main tactful by main transformer high-pressure side gear liter by controlling To 17 gears and locking, main transformer running status A2 is located at region 9, release after action.
By both the above control method, each operational factor of main transformer is as shown in table 2 after state A1 actions.
Main transformer primary operating parameter after the state A1 of table 2 actions
Control strategy QH/Mvar VL/kV VM/kV
20 area's figures 7.81 10.57 110.42
17 area's figures 1.19 10.56 109.51
From table 2, compared with traditional 17 area's figure control methods, three can be avoided according to control method provided by the invention Voltage gets over lower limit after winding transformer causes action because medium voltage side busbar voltage is relatively low, so as to effectively alleviate lower floor's power network Pressure regulation pressure.
To state B1：Refering to Fig. 5, it is corresponding to be in the area's figure of region 10,20 by three-winding transformer running status B1 before action Main strategy is throwing capacitor.It is 10Mvar capacitor and reverse locking by one pool-size of main strategy input is controlled, it is main after action Become running status B2 and be in region 20, now 20 area's figures correspond to main strategy and boost or throw for main transformer downshift and hold.By the main plan of control Main transformer high-pressure side gear is slightly down to 15 gears and locking, main transformer running status B3 is located at region 9, release after action.
Refering to Fig. 6, under the same terms, according to traditional 17 area's figure VQC control methods, three-winding transformer is transported before action Row state B1 is in the area's figure of region 10,17 and corresponds to main strategy to throw capacitor.It is by one pool-size of main strategy input is controlled 10Mvar capacitor and reverse locking, main transformer running status B2 is in region 9, release after action.
By both the above control method, each operational factor of main transformer is as shown in table 3 after state B1 actions.
Main transformer primary operating parameter after the state B1 of table 3 actions
, can be by entering according to control method provided by the invention compared with traditional 17 area's figure control strategies from table 3 The action of one step makes VMV is risen to from relatively low scopesMore than, ensure VMWith more sufficient regulation nargin, it is female to improve main transformer medium voltage side Line voltage safety, alleviates lower floor's power grid voltage regulating pressure.
A kind of transformer station's VQC control methods for considering side voltage security in becoming proposed by the present invention can ensure power transformation Three-winding transformer high-pressure side reactive power of standing and low-pressure side bus voltage are taken into account in main transformer while being located in zone of reasonableness Press the security of side bus voltage, the pressure regulation pressure of lower floor's power network when alleviating load peak.Meanwhile reasonably closed by setting Bolt part can effectively lift power system fortune to avoid the frequent switching of the frequent movement of transformer gear and reactive-load compensation equipment Capable reliability, there is stronger engineering application value.
Above-described embodiment is the preferable embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment Limit, modification, modification, replacement, combination, the simplification made under other any Spirit Essences and principle without departing from the present invention, Equivalent substitute mode is should be, should be all included within protection scope of the present invention.

Claims (1)

1. a kind of transformer station's VQC control methods for considering side voltage security in becoming, it is characterised in that comprise the following steps：
(1) the current idle Q in critical point of three-winding transformer is gatheredH, main transformer medium voltage side busbar voltage VM, main transformer low-pressure side bus electricity Press VL, main transformer low-pressure side reactive-load compensation equipment switching and main distribution network information, wherein QHIt is defined as sending idle work(under main transformer high-pressure side Rate, QHJust to represent to send reactive power, Q under to lower floor's power networkHFor negative indication reactive power is sent to upper strata power network；
(2) Q is setHUpper and lower limit QHmax、QHmin, VMLower limit VMmin, VLUpper and lower limit VLmax、VLmin；
(3) main transformer medium voltage side busbar voltage margin of safety V is calculateds；Described main transformer medium voltage side busbar voltage margin of safety Vs Acquisition methods it is as follows：
Comprising variable in formula (1)：Three-winding transformer is kept off away from d；Main transformer medium voltage side busbar voltage lower limit VMmin；Main transformer medium voltage side volume Determine voltage V2N；The margin of safety Δ V of main transformer medium voltage side busbar voltageδ；VsTo differentiate VMIt is whether relatively low, it is 17 area's figures of selection Or 20 area's figure control strategy foundation；
(4) it is locking after gear shift once to set main distribution network barring condition, sets reactive-load compensation equipment switching barring condition to throw Enter or cut off reverse locking after one group of reactive-load compensation equipment；
(5) main distribution network regulation and reactive-load compensation equipment switching are carried out by main strategy, if the corresponding main distribution network or idle of main strategy Compensation equipment is in blocking and uses standby strategy：
Work as VM≥VsWhen, carry out main distribution network regulation and reactive-load compensation equipment switching according to the area's figure VQC control methods of tradition 17；
Work as VM＜ VsWhen, carry out main distribution network regulation and reactive-load compensation equipment switching according to 20 area's figure VQC control methods；
The specific implementation method of 20 described area's figure VQC control methods is：
If VL＞ VLmax, main strategy is set to cut capacitor, and standby strategy is to be failure to actuate；
If QH＜ QHminAnd VLmax-ΔVLt＜ VL＜ VLmax, main strategy is set to cut capacitor, and standby strategy is to be failure to actuate；
If QH＞ QHmaxAnd VLmax-ΔVLq＜ VL＜ VLmax, it is to be failure to actuate to set main tactful and standby strategy；
If QH＜ QHminAnd VLmin+ΔVLq＜ VL＜ VLmax-ΔVLt, the main strategy of setting is downshift boosting, and standby strategy is to cut electric capacity Device；
If QHmin＜ QH＜ QHmin+ΔQHqAnd VLmax-ΔVLt＜ VL＜ VLmaxOr QHmin+ΔQHq＜ QH＜ QHmaxAnd VLmax-ΔVLq ＜ VL＜ VLmax, it is to be failure to actuate to set main tactful and standby strategy；
If QH＞ QHmaxAnd VLmin+ΔVLt＜ VL＜ VLmax-ΔVLq, main strategy is set to throw capacitor, and standby strategy is motionless Make；
If QH＜ QHminAnd VLmin＜ VL＜ VLmin+ΔVLq, the main strategy of setting is downshift boosting, and standby strategy is to be failure to actuate；
If QH＞ QHmaxAnd VLmin＜ VL＜ VLmin+ΔVLt, for the main strategy of setting to throw capacitor, standby strategy is to be failure to actuate；
If QH＜ QHminAnd VL＜ VLmin, the main strategy of setting is downshift boosting, and standby strategy is to throw electric capacity；
If QHmin＜ QH＜ QHmin+ΔQHqAnd VL＜ VLmin, the main strategy of setting is downshift boosting, and standby strategy is to throw capacitor；
If QHmin+ΔQHq＜ QH＜ QHmax-ΔQHtAnd VL＜ VLmin, set main strategy and boost or throw capacitor, standby plan for downshift Slightly throw capacitor or downshift boosting；
If QHmax-ΔQHt＜ QH＜ QHmaxAnd VL＜ VLmin, main strategy is set to throw capacitor, and standby strategy boosts for downshift；
If QH＞ QHmaxAnd VL＜ VLmin, main strategy is set to throw capacitor, and standby strategy boosts for downshift；
If QHmin＜ QH＜ QHmax-ΔQHtAnd VLmin＜ VL＜ VLmax-ΔVLt, set main strategy and boosted for downshift, standby strategy is It is failure to actuate；
If QHmin+ΔQHq＜ QH＜ QHmaxAnd VLmin＜ VL＜ VLmax-ΔVLq, it is head capacitor to set main strategy, and standby strategy is It is failure to actuate；
If QHmin+ΔQHq＜ QH＜ QH＜ QHmax-ΔQHtAnd VLmin＜ VL＜ VLmax-ΔVLt, set it is main strategy for downshift boosting or Capacitor is thrown, standby strategy boosts to throw capacitor or downshift；
Wherein, Δ VLtBased on become high-pressure side regulation one gear caused by VLMaximum variable quantity, Δ VLqCause for the group capacitor of switching one VLMaximum variable quantity, Δ QHtBased on become high-pressure side regulation one gear caused by QHMaximum variable quantity, Δ QHqFor one group of electric capacity of switching Q caused by deviceHMaximum variable quantity.
CN201510971022.7A 2015-12-20 2015-12-20 A kind of transformer station's VQC control methods for considering side voltage security in becoming Expired - Fee Related CN105429151B (en)

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