CN109274105A - A kind of substation AVC system and its idle real-time regulated quantity calculation method - Google Patents
A kind of substation AVC system and its idle real-time regulated quantity calculation method Download PDFInfo
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- CN109274105A CN109274105A CN201710581525.2A CN201710581525A CN109274105A CN 109274105 A CN109274105 A CN 109274105A CN 201710581525 A CN201710581525 A CN 201710581525A CN 109274105 A CN109274105 A CN 109274105A
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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
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Abstract
The present invention relates to a kind of substation AVC system and its idle real-time regulated quantity calculation methods, this programme passes through series of features value, simplify complicated relationship between the parameters such as reactive power, busbar voltage, and set up the high or low pressure side investment reactive power compensator of transformer, or after one grade of sub-connecting switch of transformer position is raised and lowered, to the model of high side bus voltage, low-pressure side bus voltage and the variable quantity generated by the on high-tension side reactive power of power grid input substation.In the operation of substation's AVC system for field, which can be introduced into AVC system as internal algorithm, and auxiliary AVC system quickly and accurately formulates reactive compensation switching strategy, to produce a kind of new substation's AVC system.New AVC system can satisfy the quick governing response time requirement of voltage and reactive power, maintain the voltage of substation and reactive power in acceptability limit at any time, improve the power quality of substation's output.
Description
Technical field
The present invention relates to a kind of substation AVC system and its idle real-time regulated quantity calculation methods, belong to power technology neck
Domain.
Background technique
Substation according in the power system status and effect can be divided into system load-center substation, regional one time power transformation
It stands, regional secondary substation and one-end substation.Generally nothing directly is installed to the one-end substation of customer power supply in power grid end
Reactive power compensation installations and auto voltage control (abbreviation AVC) system, carry out idle and voltage adjusting, guarantee user to reach
The power quality of power supply is held, and reduces the purpose of active power loss in network system.
AVC system is the software systems that voltage and power factor are controlled automatically in a set of pair of substation, it in real time with
Voltage and idle situation of change in track substation, and switching reactive compensator (such as shunt capacitor group, parallel connection are taken automatically
Reactor group), adjust dynamic reactive compensation device (such as SVG, SVC) idle power output, adjust sub-connecting switch of transformer gear
Etc. control means so that the voltage of substation and power factor quality meet the requirement of user's normal electricity consumption.
There are the response parameters that four class voltage power-less are adjusted in AVC system, it may be assumed that mother caused by input unit's reactive power
Line voltage increment Ku,q, K is reduced by the on high-tension side reactive power of power grid input substation caused by input unit's reactive powerq,q、
Busbar voltage increment K caused by sub-connecting switch of transformer adjusts one gradeu,δ, sub-connecting switch of transformer adjust one grade caused by by electricity
The on high-tension side reactive power of net input substation is reduced Kq,δ.Variation due to voltage and phase between reactive power and other parameters
It mutually influences, relationship is intricate.
In traditional substation AVC application system, operations staff goes to be arranged the prior art by way of experience or actual measurement
The value of these parameters.The response parameter not instead of quiescent value that actually four class voltage power-less are adjusted, one is worked as with power grid
Preceding operating status (such as virtual voltage of high and low pressure side bus, the actual power that transformer high and low pressure effluent is crossed, load or burden without work
Voltage responsive characteristic etc.) closely bound up dynamic value.Therefore traditional substation AVC system based on static parameter configuration exists
Adjusting is often, adjustment process is long and is easy to appear the defect that oscillation adjusts phenomenon.It adjusts and rings this substantially prolongs AVC system
The time answered reduces the efficiency and accuracy of power factor regulation, reduces power grid quality, is increasingly difficult to meet intelligent power transformation
The requirement stood to system automation and degree of intelligence.
Summary of the invention
The object of the present invention is to provide a kind of substation AVC system and its idle real-time regulated quantity calculation methods, to solve
Certainly the prior art substation to busbar voltage and power factor of electric network adjust present in adjust often, adjustment process it is long with
And it is easy to appear the problem of oscillation adjusts phenomenon.
To achieve the above object, the solution of the present invention includes:
A kind of calculation method of the high-pressure side reactive compensation dynamic response parameter of substation AVC system of the invention, including
Following steps:
Acquire gear n, the high voltage side of transformer three-phase bus line electricity of the current tap switch of substation's on-load regulator transformer
The average value U of pressure1, step down side three-phase bus line voltage average value U2, by power grid input, substation is on high-tension side always has
Function power P1, by power grid input the on high-tension side total reactive power Q of substation1, transformer low voltage side bus exports to power load
Total active-power P2, low-pressure side bus exports to total reactive power Q of power load2；
High-pressure side reactive compensation dynamic response parameter is calculated, the high-pressure side reactive compensation dynamic response parameter includes: height
Pressure side bus compensation unit reactive power causes low-pressure side bus voltage increment Ku2,q1；
Wherein, Kqu,t=2 (XTY2-BT)U2,ZT 2=XT 2+
RT 2,
Wherein, XLFor bulk power grid power end to the reactance of equivalent circuit, R between substation's high-voltage side busTReturn for transformer
Calculate branch resistance, the X of low-pressure sideTFor the branch reactance of transformer reduction to low-pressure side, BTLow-pressure side is arrived for transformer reduction
Susceptance, U over the ground1eFor high voltage side of transformer voltage rating, U2eFor step down side voltage rating, δu% is the grade electricity of transformer
Pressure；The step voltage is the percentage value of every grade of adjustable range of sub-connecting switch of transformer.
Further, the high-pressure side reactive compensation dynamic response parameter further include: it is idle that high-voltage side bus compensates unit
Power causes high side bus voltage increment Ku1,q1；
Further, the high-pressure side reactive compensation dynamic response parameter further include: it is idle that high-voltage side bus compensates unit
K is reduced by the on high-tension side reactive power of power grid input substation caused by powerq,q1；
A kind of calculation method of the low-pressure side reactive compensation dynamic response parameter of substation AVC system of the invention, including
Following steps:
Acquire gear n, the high voltage side of transformer three-phase bus line electricity of the current tap switch of substation's on-load regulator transformer
The average value U of pressure1, step down side three-phase bus line voltage average value U2, by power grid input, substation is on high-tension side always has
Function power P1, by power grid input the on high-tension side total reactive power Q of substation1, transformer low voltage side bus exports to power load
Total active-power P2, low-pressure side bus exports to total reactive power Q of power load2；
Low-pressure side reactive compensation dynamic response parameter is calculated, the low-pressure side reactive compensation dynamic response parameter includes: low
Pressure side bus compensation unit reactive power causes low-pressure side bus voltage increment Ku2,q2；
Wherein, Kqu,t=2 (XTY2-BT)U2,ZT 2=XT 2+
RT 2,
Wherein, XLFor bulk power grid power end to the reactance of equivalent circuit, R between substation's high-voltage side busTReturn for transformer
Calculate branch resistance, the X of low-pressure sideTFor the branch reactance of transformer reduction to low-pressure side, BTLow-pressure side is arrived for transformer reduction
Susceptance, U over the ground1eFor high voltage side of transformer voltage rating, U2eFor step down side voltage rating, δu% is the grade electricity of transformer
Pressure；The step voltage is the percentage value of every grade of adjustable range of sub-connecting switch of transformer.
Further, the low-pressure side reactive compensation dynamic response parameter further include: it is idle that low-pressure side bus compensates unit
Power causes high side bus voltage increment Ku1,q2；
Further, the low-pressure side reactive compensation dynamic response parameter further include: it is idle that low-pressure side bus compensates unit
K is reduced by the on high-tension side reactive power of power grid input substation caused by powerq,q2；
A kind of sub-connecting switch of transformer of substation AVC system of the invention adjusts the calculation method of dynamic response parameter,
The following steps are included:
Acquire gear n, the high voltage side of transformer three-phase bus line electricity of the current tap switch of substation's on-load regulator transformer
The average value U of pressure1, step down side three-phase bus line voltage average value U2, by power grid input, substation is on high-tension side always has
Function power P1, by power grid input the on high-tension side total reactive power Q of substation1, transformer low voltage side bus exports to power load
Total active-power P2, low-pressure side bus exports to total reactive power Q of power load2；
Calculating transformer tap switch adjusts dynamic response parameter, and the sub-connecting switch of transformer adjusts dynamic response parameter
It include: that one grade of sub-connecting switch of transformer raising causes low-pressure side bus voltage increment Ku2,δ+And sub-connecting switch of transformer reduces
One grade causes low-pressure side bus voltage increment Ku2,δ-；
Wherein, Kqu,t=2 (XTY2-BT)U2,ZT 2=XT 2+
RT 2,
Wherein, XLFor bulk power grid power end to the reactance of equivalent circuit, R between substation's high-voltage side busTReturn for transformer
Calculate branch resistance, the X of low-pressure sideTFor the branch reactance of transformer reduction to low-pressure side, BTLow-pressure side is arrived for transformer reduction
Susceptance, U over the ground1eFor high voltage side of transformer voltage rating, U2eFor step down side voltage rating, δu% is the grade electricity of transformer
Pressure；The step voltage is the percentage value of every grade of adjustable range of sub-connecting switch of transformer.
Further, the sub-connecting switch of transformer adjusts dynamic response parameter further include: sub-connecting switch of transformer increases
One grade causes high side bus voltage increment Ku1,δ+And sub-connecting switch of transformer reduces by one grade and high side bus voltage is caused to increase
Measure Ku1,δ-；
Further, the sub-connecting switch of transformer adjusts dynamic response parameter further include: sub-connecting switch of transformer increases
K is reduced by the on high-tension side reactive power of power grid input substation caused by one gradeq,δ+And sub-connecting switch of transformer reduces by one grade
It is caused that K is reduced by the on high-tension side reactive power of power grid input substationq,δ-；
A kind of substation AVC system of the invention, including acquisition module and processor, the acquisition module become for acquiring
The average value U of the gear n of the current tap switch of power station on-load regulator transformer, high voltage side of transformer three-phase bus line voltage1, become
The average value U of depressor low-pressure side three-phase bus line voltage2, by power grid input the on high-tension side total active-power P of substation1, by power grid
Input the on high-tension side total reactive power Q of substation1, transformer low voltage side bus exports to total active-power P of power load2, it is low
Pressure side bus is exported to total reactive power Q of power load2；The processor requires any one of 1~9 for perform claim
Calculation method.
The invention has the benefit that
This programme, will be crisscross multiple between busbar voltage and reactive power and other parameters by setting series of features value
Miscellaneous influence each other is reduced to several models that only the unit Reactive-power control comprising characteristic value causes busbar voltage to change, and utilizes the mould
Type can efficient quick obtain influence of the Reactive-power control to voltage；The model is introduced to the adjusting strategy of AVC system power factor
When middle, AVC system can be assisted reasonably to execute adjusting movement, to produce a kind of new substation's AVC system.New AVC
System can shorten round and the time of control strategy execution significantly, improve the working efficiency and the degree of automation of system, simultaneously
The accuracy that raising system is adjusted improves power quality.
Detailed description of the invention
Fig. 1 is the trend equivalent circuit diagram for flowing through one-end substation；
Fig. 2 is the voltage and reactive power Tiny increment dt circuit diagram of one-end substation；
Fig. 3 is the voltage power-less Tiny increment dt schematic diagram that high-voltage side bus puts into capacitor situation；
Fig. 4 is the voltage power-less Tiny increment dt schematic diagram that low-pressure side bus puts into capacitor situation；
Fig. 5 is the voltage power-less Tiny increment dt schematic diagram that sub-connecting switch of transformer increases one grade of situation；
Fig. 6 is a kind of control flow chart of substation AVC system.
Specific embodiment
The present invention will be further described in detail with reference to the accompanying drawing.
The present invention provides a kind of substation AVC system and its idle real-time regulated quantity calculation method, is suitable for terminal power transformation
It stands.
For the substation of two-winding transformer, transmission line of electricity, transformer, bus, shunt capacitor group and electric power are flowed through
The power of load can indicate with equivalent circuit diagram, as shown in Figure 1.
U0、U1、U0、U′1Respectively bulk power grid power end busbar voltage, main transformer high side bus voltage, main transformer
Low-pressure side bus voltage, main transformer high side bus voltage are depressured to the voltage of low-pressure side by ideal transformer.
RL、XL、BCRespectively bulk power grid power end is to the resistance of substitutional connection between substation's high-voltage side bus, reactance, right
Ground susceptance.
RT、XT、GT、BTRespectively transformer reduction is to the branch resistance of low-pressure side, branch reactance, over the ground conductance, electric over the ground
It receives.Wherein,Ud% is the resistance for needing the transformer side (low-pressure side) compensated
Reactance voltage percentage value, Io% is no-load transformer electric current percentage value；SeFor the rated capacity of transformer, U2eFor step down side
Voltage rating.
KTFor the current no-load voltage ratio of transformer,N is the current gear of sub-connecting switch of transformer,
U1eFor high voltage side of transformer voltage rating, δuPercentage value (the i.e. grade electricity of % indication transformer every grade of adjustable range of tap switch
Pressure).
1) the voltage power-less Tiny increment dt of inlet wire route calculates
If the bus of route head end (i.e. bulk power grid power end) is balance nodes, voltage in equivalent circuit diagramFor reference
Voltage (amplitude and phase angle are fixed).Head end voltageFor
Head end voltage amplitude is
Wherein,Above formula is substituted into, is obtained
In view of the variation of voltage magnitude influences very little to the variation of active power, if P1It remains unchanged, above formula both sides pair
Voltage, it is idle differentiate, respectively indicate voltage Tiny increment dt, idle Tiny increment dt with dU, Δ Q, obtain:
Since the voltage of route head end is reference voltage, constant amplitude has dU0=0；Consider further that BcXL< < 1, can
It is by above formula abbreviation
From the above equation, we can see that: if line end voltage increases (dU1> 0), then the reactive power of circuit output reduces (Δ Q1<0)。
If the voltage of end is from U1Become (U1+dU1) when, the power of end output is by (P1+jQ1) become P1+j(Q1-dQ1), wherein route
The reactive power dQ of output1For decrement.Then the voltage power-less increment relation formula of route is
Abbreviation above formula obtains the voltage power-less Tiny increment dt equation of route:
In above formula,WhenWhen, there is E ≈ (0.95~1.15), 1.0 approximations can be used
Replace the value of E.
2) the reactive power Tiny increment dt of transformer calculates
The loss for flowing through the reactive power of transformer is
So being by the reactive power of high-pressure side inflow transformer
If the increment of transformer high and low pressure side voltage is respectively dU1、dU2, high-pressure side input is idle, low-pressure side output is idle
Increment be respectively Δ Q1、ΔQ2, defining sub-connecting switch of transformer adjusting direction isTo formula (9)
Both ends are differentiated, and are obtained:
It enablesAbbreviation above formula obtains the idle Tiny increment dt equation of transformer:
3) the voltage Tiny increment dt of transformer calculates
In Fig. 1, the voltage relationship at transformer branch impedance both ends is
Above formula is converted into
If the increment of transformer high and low pressure side voltage is respectively dU1、dU2, it is Δ Q that low-pressure side, which exports idle increment,2, right
Formula (12) both ends are differentiated, and carry out abbreviation, are obtained
Abbreviation above formula then has the voltage Tiny increment dt equation of transformer
With formula (15) abbreviation formula (11), and consider BTXT< < 1, obtains
4) the voltage power-less response characteristic of load
According to side capacitive reactive power compensation principle on the spot, when improving substation bus bar working voltage as purpose, load side is female
The calculating formula for the capacitive reactive power amount that line need to compensate are as follows:
dU2For the lift-off value of the bus line voltage after low-pressure side shunt capacitor group investment；U2For shunt capacitor group investment
The line voltage value of preceding bus operation；dQcFor the capacitive reactive power amount of the shunt capacitor group of investment bus；XΣFor the total reactance in circuit.
Above formula is suitable for the case where negligible resistance；If circuit all-in resistanceWhen, it is necessary to total impedanceTo substitute total reactance X in above formulaΣ.For the low-pressure side bus of one-end substation, general satisfaction inWherein,
By formula (7) it is found that the reactive power decrement Δ Q of step down side output2-For
(17) comparative, it is seen that Δ Q2-<dQc, then the reactive power of reactive power compensator compensation, in addition to a part is offset
Fall other than the reactive power decrement of step down side output, some flows into the load of bus institute band.Therefore, work as bus
Voltage increase dU2When, if load reactive power increment is dQ2, can get load voltage power-less Tiny increment dt equation it is as follows
5) transforming plant voltage reactive power Tiny increment dt calculates
In conclusion enabling
Combined type (7), formula (11), formula (15), formula (19) can obtain the voltage and reactive power Tiny increment dt equation group of substation such as
Under:
Above formula is the relationship of the voltage and reactive power Tiny increment dt in substation at transformer high and low pressure side bus.Wherein,
Q1、U1It can be acquired respectively by formula (9), formula (13), Uδ、Kqu,l、Kuu,t、Kuq,t、Kqq,t、Kqu,t、Kqu,fBefore can be by idle variation
Known numeric value acquires.The voltage and reactive power Tiny increment dt of one-end substation is indicated on circuit diagram, as shown in Figure 2.
Below in conjunction with the circuit diagram of Fig. 3~Fig. 5, the calculating side of transforming plant voltage reactive dynamic response parameter is described in detail
Method.
The present invention corresponding electricity when changing the voltage for analyzing substation respectively according to following three kinds of situations and reactive power
Press the calculating formula of idle dynamic response parameter: a) high voltage side of transformer supplement capacitive reactive power (or excision inductive reactive power)；B) transformation
Device low-pressure side supplements capacitive reactive power (or excision inductive reactive power)；C) sub-connecting switch of transformer increases one grade of (or reduction).
High voltage side of transformer excision capacitive reactive power (or supplement inductive reactive power), low-pressure side excision capacitive reactive power (or are mended
Fill inductive reactive power) the case where, it is public with the calculating that same processing mode can acquire its corresponding voltage power-less dynamic response parameter
Formula.
(1) high voltage side of transformer supplement capacitive reactive power (or excision inductive reactive power) dQC1
As shown in figure 3, high voltage side of transformer supplement capacitive reactive power (or excision inductive reactive power) dQC1, then have: input transformer
High-pressure side reactive power increment is Δ Q1=dQC1-dQ1, step down side output reactive power increment is Δ Q2=dQ2, transformation
It is D that device tap switch, which adjusts direction,δ=0.The voltage and reactive power Tiny increment dt equation group (21) for substituting them in substation, can solve
:
It enables
Kqu,c=Kqu,l(Kuu,t+Kuq,tKqu,f)+Kqq,tKqu,f-Kqu,t(23)
From formula (22): parameter Kqu,cValue, be exactly only by high voltage side of transformer put into capacitive reactive power operation when, make
Low-pressure side promotes the capacitive reactive power (MVar/kV) that high-voltage side bus required for unit voltage compensates.Then high-pressure side is put into
Low-pressure side bus voltage increment caused by unit reactive power are as follows:
Similarly, high side bus voltage increment caused by high-pressure side input unit reactive power can be solved as formula (21) are as follows:
It is reduced caused by high-pressure side input unit reactive power by the on high-tension side reactive power of power grid input substation are as follows:
(2) step down side supplement capacitive reactive power (or excision inductive reactive power) dQC2
As shown in figure 4, supplementing capacitive reactive power (or excision inductive reactive power) dQ in transformer low voltage side busC2, then have: input
High voltage side of transformer reactive power increment is Δ Q1=-dQ1, step down side output reactive power increment is Δ Q2=dQ2-
dQC2, it is D that sub-connecting switch of transformer, which adjusts direction,δ=0.Equation group (21) are substituted them in, can be solved:
Low-pressure side bus voltage increment caused by low-pressure side input unit reactive power is
High side bus voltage increment caused by low-pressure side input unit reactive power is
It is reduced to caused by low-pressure side input unit reactive power by the power grid input on high-tension side reactive power of substation
(3) sub-connecting switch of transformer increases one grade
As shown in figure 5, having if the position of tapping switch of transformer increases by one grade: input transformer high-pressure side is idle function
Rate increment is Δ Q1=-dQ1, step down side output reactive power increment is Δ Q2=dQ2, sub-connecting switch of transformer adjusting
Direction is Dδ=1.Equation group (21) are substituted them in, can be solved:
Sub-connecting switch of transformer increase one grade caused by low-pressure side bus voltage increment be
The increment of high side bus voltage caused by sub-connecting switch of transformer increases one grade is
Sub-connecting switch of transformer is reduced to caused by increasing one grade by the power grid input on high-tension side reactive power of substation
Transforming plant voltage reactive dynamic response parameter K caused by reducing by one grade for sub-connecting switch of transformeru2,δ-、Ku1,δ-、
Kq,δ-Calculation formula, respectively formula (30), formula (31), formula (32) take inverse value.
The present invention is based on the inlet wire substitutional connection of substation, transformer, transformer bus, reactive-load compensation equipment and loads
The voltage and reactive power response characteristic of electrical wiring relationship and each equipment is theoretical, and the voltage and reactive power for generating substation is micro-
Incremental Equation group.
Series of features value is arranged in this programme, simplifies complicated relationship between each parameter, and reach using the list of feature values
Out: after transformer high-voltage side bus or low-pressure side bus investment reactive power compensator, or increasing (or reduction) one grade of transformation
After device position of tapping switch, to the voltage of transformer high and low pressure side bus, and by inlet wire route inflow substation by power grid
Input the computation model of variable quantity caused by the on high-tension side reactive power of substation.
The above computation model can be used as the reference that AVC system is adjusted, and the AVC system for introducing the model does not need
Configure voltage and reactive power governing response parameter.Specifically, when transformer low voltage side bus voltage is abnormal or high voltage side of transformer
It is real-time using the model and corresponding calculation method when busbar voltage is abnormal or high voltage side of transformer inputs reactive power exception
The reactive power that substation low-voltage side bus needs the reactive power compensated or substation's high-voltage side bus to need to compensate is calculated,
Or the gear that sub-connecting switch of transformer needs to adjust, and according to the currently practical operation conditions of substation and the big of amount is adjusted
It is small, select a kind of optimal conciliation scheme to go to execute.It is as shown in Figure 6 to execute process.
Traditional AVC application software takes the scheme configured according to voltage and reactive power response parameter value bigger than normal,
So that the reactive power value adjusted every time is less than normal, it is not in overregulate；And by repeatedly a small amount of adjustings so that substation
Quality of voltage finally meets user's requirement.Its defect is: the first, adjusting often, adjustment process is long, is not able to satisfy and quickly reaches
To the requirement of qualified voltage quality, it is sometimes desirable to install some special protection equipment (such as low-voltage automatic load-reducing device) or
Automatic Reactive-power control equipment (such as SVC, STATCOM, SVG) requires to cooperate to adjust to meet rapidity；The second, certain specific
Operation conditions under be likely to occur oscillation and adjust, fluctuate quality of voltage back and forth in the both sides of acceptance value, need at this time manually dry
In advance or some special measures is taken to adjust to terminate oscillation.
The calculation formula of transforming plant voltage reactive dynamic response parameter is directly applied to AVC as internal algorithm by the present invention
Software product, these calculating formulas can assist in AVC software systems and quickly and accurately formulate control strategy.When the voltage of substation
Or when power factor deviation acceptability limit, new AVC product will the real-time voltage power-less function calculated under substation's current operating conditions
Rate response parameter value so as to find out the regulated quantity of needs, and chooses an optimal control program and goes to execute.Do not considering every time
Under the maximum allowable regulated quantity of movement requires, new AVC software can be acted by 1~2 adjusting, make the voltage and function of substation
Rate factor reaches acceptability limit, meets rapidity requirement, and oscillation can be avoided to adjust phenomenon well.To make the electricity of substation
Pressure and reactive power maintain in acceptability limit at any time, improve the power quality of substation's output.
Claims (10)
1. a kind of calculation method of the high-pressure side reactive compensation dynamic response parameter of substation AVC system, which is characterized in that including
Following steps:
Acquire the gear n of the current tap switch of substation's on-load regulator transformer, high voltage side of transformer three-phase bus line voltage
Average value U1, step down side three-phase bus line voltage average value U2, by power grid input the on high-tension side total wattful power of substation
Rate P1, by power grid input the on high-tension side total reactive power Q of substation1, transformer low voltage side bus export always having to power load
Function power P2, low-pressure side bus exports to total reactive power Q of power load2；
High-pressure side reactive compensation dynamic response parameter is calculated, the high-pressure side reactive compensation dynamic response parameter includes: high-pressure side
Bus-bar collocation unit reactive power causes low-pressure side bus voltage increment Ku2,q1；
Wherein,
Wherein, XLFor bulk power grid power end to the reactance of equivalent circuit, R between substation's high-voltage side busTIt is arrived for transformer reduction
Branch resistance, the X of low-pressure sideTFor the branch reactance of transformer reduction to low-pressure side, BTFor transformer reduction to low-pressure side over the ground
Susceptance, U1eFor high voltage side of transformer voltage rating, U2eFor step down side voltage rating, δu% is the step voltage of transformer；
The step voltage is the percentage value of every grade of adjustable range of sub-connecting switch of transformer.
2. a kind of calculating of the high-pressure side reactive compensation dynamic response parameter of substation AVC system according to claim 1
Method, which is characterized in that the high-pressure side reactive compensation dynamic response parameter further include: high-voltage side bus compensates the idle function of unit
Rate causes high side bus voltage increment Ku1,q1；
3. a kind of calculating of the high-pressure side reactive compensation dynamic response parameter of substation AVC system according to claim 1
Method, which is characterized in that the high-pressure side reactive compensation dynamic response parameter further include: high-voltage side bus compensates the idle function of unit
K is reduced by the on high-tension side reactive power of power grid input substation caused by rateq,q1；
4. a kind of calculation method of the low-pressure side reactive compensation dynamic response parameter of substation AVC system, which is characterized in that including
Following steps:
Acquire the gear n of the current tap switch of substation's on-load regulator transformer, high voltage side of transformer three-phase bus line voltage
Average value U1, step down side three-phase bus line voltage average value U2, by power grid input the on high-tension side total wattful power of substation
Rate P1, by power grid input the on high-tension side total reactive power Q of substation1, transformer low voltage side bus export always having to power load
Function power P2, low-pressure side bus exports to total reactive power Q of power load2；
Low-pressure side reactive compensation dynamic response parameter is calculated, the low-pressure side reactive compensation dynamic response parameter includes: low-pressure side
Bus-bar collocation unit reactive power causes low-pressure side bus voltage increment Ku2,q2；
Wherein,
Wherein, XLFor bulk power grid power end to the reactance of equivalent circuit, R between substation's high-voltage side busTIt is arrived for transformer reduction
Branch resistance, the X of low-pressure sideTFor the branch reactance of transformer reduction to low-pressure side, BTFor transformer reduction to low-pressure side over the ground
Susceptance, U1eFor high voltage side of transformer voltage rating, U2eFor step down side voltage rating, δu% is the step voltage of transformer；
The step voltage is the percentage value of every grade of adjustable range of sub-connecting switch of transformer.
5. a kind of calculating of the low-pressure side reactive compensation dynamic response parameter of substation AVC system according to claim 4
Method, which is characterized in that the low-pressure side reactive compensation dynamic response parameter further include: low-pressure side bus compensates the idle function of unit
Rate causes high side bus voltage increment Ku1,q2；
6. a kind of calculating of the low-pressure side reactive compensation dynamic response parameter of substation AVC system according to claim 4
Method, which is characterized in that the low-pressure side reactive compensation dynamic response parameter further include: low-pressure side bus compensates the idle function of unit
K is reduced by the on high-tension side reactive power of power grid input substation caused by rateq,q2；
7. the calculation method that a kind of sub-connecting switch of transformer of substation AVC system adjusts dynamic response parameter, which is characterized in that
The following steps are included:
Acquire the gear n of the current tap switch of substation's on-load regulator transformer, high voltage side of transformer three-phase bus line voltage
Average value U1, step down side three-phase bus line voltage average value U2, by power grid input the on high-tension side total wattful power of substation
Rate P1, by power grid input the on high-tension side total reactive power Q of substation1, transformer low voltage side bus export always having to power load
Function power P2, low-pressure side bus exports to total reactive power Q of power load2；
Calculating transformer tap switch adjusts dynamic response parameter, and the sub-connecting switch of transformer adjusts dynamic response parameter packet
Include: sub-connecting switch of transformer increases one grade and causes low-pressure side bus voltage increment Ku2,δ+And sub-connecting switch of transformer reduces by one
Shelves cause low-pressure side bus voltage increment Ku2,δ-；
Wherein,
Wherein, XLFor bulk power grid power end to the reactance of equivalent circuit, R between substation's high-voltage side busTIt is arrived for transformer reduction
Branch resistance, the X of low-pressure sideTFor the branch reactance of transformer reduction to low-pressure side, BTFor transformer reduction to low-pressure side over the ground
Susceptance, U1eFor high voltage side of transformer voltage rating, U2eFor step down side voltage rating, δu% is the step voltage of transformer；
The step voltage is the percentage value of every grade of adjustable range of sub-connecting switch of transformer.
8. a kind of sub-connecting switch of transformer of substation AVC system according to claim 7 adjusts dynamic response parameter
Calculation method, which is characterized in that the sub-connecting switch of transformer adjusts dynamic response parameter further include: sub-connecting switch of transformer liter
High one grade causes high side bus voltage increment Ku1,δ+And sub-connecting switch of transformer reduces by one grade and causes high side bus voltage
Increment Ku1,δ-；
9. a kind of sub-connecting switch of transformer of substation AVC system according to claim 7 adjusts dynamic response parameter
Calculation method, which is characterized in that the sub-connecting switch of transformer adjusts dynamic response parameter further include: sub-connecting switch of transformer liter
K is reduced by the on high-tension side reactive power of power grid input substation caused by high one gradeq,δ+And sub-connecting switch of transformer reduces by one
K is reduced by the on high-tension side reactive power of power grid input substation caused by shelvesq,δ-；
10. a kind of substation AVC system, which is characterized in that including acquisition module and processor, the acquisition module is for acquiring
The average value U of the gear n of the current tap switch of substation's on-load regulator transformer, high voltage side of transformer three-phase bus line voltage1、
The average value U of step down side three-phase bus line voltage2, by power grid input the on high-tension side total active-power P of substation1, by electricity
The net input on high-tension side total reactive power Q of substation1, transformer low voltage side bus exports to total active-power P of power load2、
Low-pressure side bus is exported to total reactive power Q of power load2；The processor requires any one of 1~9 for perform claim
Calculation method.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112217125A (en) * | 2020-10-23 | 2021-01-12 | 华夏恒业变压器有限公司 | Thing allies oneself with box-type substation |
| CN114362195A (en) * | 2022-01-18 | 2022-04-15 | 广东电网有限责任公司 | Flexible alternating current-direct current hybrid distribution network transformer substation low-voltage bus voltage regulation method and system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976847A (en) * | 2010-11-05 | 2011-02-16 | 福建省电力有限公司泉州电业局 | SVC (Static Var Compensator) and AVC (Automatic Voltage Control) joint debugging control system |
| CN102427234A (en) * | 2011-12-20 | 2012-04-25 | 东方电子股份有限公司 | AVC (Automatic Voltage Control) joint-debugging control method based on var compensation technology |
| CN102801170A (en) * | 2012-08-07 | 2012-11-28 | 广东电网公司中山供电局 | Reactive-voltage control method and system of regional power-grid substations |
| CN103094910A (en) * | 2012-10-30 | 2013-05-08 | 中国电力科学研究院 | Multilevel automatic voltage reactive power control system AVC coordination control method |
| CN104967130A (en) * | 2015-04-29 | 2015-10-07 | 酒泉钢铁(集团)有限责任公司 | Automatic voltage control (AVC) method of connected network/isolated network switchable electric power system |
| US20170077700A1 (en) * | 2015-09-14 | 2017-03-16 | Mitsubishi Electric Research Laboratories, Inc. | Automatic Power Generation Control in Micro-Grids |
-
2017
- 2017-07-17 CN CN201710581525.2A patent/CN109274105B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101976847A (en) * | 2010-11-05 | 2011-02-16 | 福建省电力有限公司泉州电业局 | SVC (Static Var Compensator) and AVC (Automatic Voltage Control) joint debugging control system |
| CN102427234A (en) * | 2011-12-20 | 2012-04-25 | 东方电子股份有限公司 | AVC (Automatic Voltage Control) joint-debugging control method based on var compensation technology |
| CN102801170A (en) * | 2012-08-07 | 2012-11-28 | 广东电网公司中山供电局 | Reactive-voltage control method and system of regional power-grid substations |
| CN103094910A (en) * | 2012-10-30 | 2013-05-08 | 中国电力科学研究院 | Multilevel automatic voltage reactive power control system AVC coordination control method |
| CN104967130A (en) * | 2015-04-29 | 2015-10-07 | 酒泉钢铁(集团)有限责任公司 | Automatic voltage control (AVC) method of connected network/isolated network switchable electric power system |
| US20170077700A1 (en) * | 2015-09-14 | 2017-03-16 | Mitsubishi Electric Research Laboratories, Inc. | Automatic Power Generation Control in Micro-Grids |
Non-Patent Citations (2)
| Title |
|---|
| KE PAN ; XUESHAN HAN: "A reactive power optimization method based on the decomposition and coordination theory for AVC in power system", 《 2004 INTERNATIONAL CONFERENCE ON POWER SYSTEM TECHNOLOGY, 2004.》 * |
| 林捷，王云柳等: "自动电压控制下的地区电网电压无功运行状态评估指标体系", 《电力系统保护与控制》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112217125A (en) * | 2020-10-23 | 2021-01-12 | 华夏恒业变压器有限公司 | Thing allies oneself with box-type substation |
| CN114362195A (en) * | 2022-01-18 | 2022-04-15 | 广东电网有限责任公司 | Flexible alternating current-direct current hybrid distribution network transformer substation low-voltage bus voltage regulation method and system |
| CN114362195B (en) * | 2022-01-18 | 2023-06-13 | 广东电网有限责任公司 | Method and system for regulating voltage of low-voltage bus of flexible AC/DC hybrid distribution network substation |
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