CN104362641B - A kind of distribution reactive comprehensive control strategy and optimum capacity collocation method - Google Patents
A kind of distribution reactive comprehensive control strategy and optimum capacity collocation method Download PDFInfo
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- CN104362641B CN104362641B CN201410568302.9A CN201410568302A CN104362641B CN 104362641 B CN104362641 B CN 104362641B CN 201410568302 A CN201410568302 A CN 201410568302A CN 104362641 B CN104362641 B CN 104362641B
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- 238000009826 distribution Methods 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000011217 control strategy Methods 0.000 title claims abstract description 12
- 230000008520 organization Effects 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 56
- 230000008901 benefit Effects 0.000 claims description 23
- 230000002950 deficient Effects 0.000 claims description 18
- 230000005611 electricity Effects 0.000 claims description 10
- 238000005457 optimization Methods 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 claims description 4
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- 230000015572 biosynthetic process Effects 0.000 claims 1
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- 238000004364 calculation method Methods 0.000 description 2
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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
- H02J3/12—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
-
- 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
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1864—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein the stepless control of reactive power is obtained by at least one reactive element connected in series with a semiconductor switch
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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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- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a kind of distribution reactive comprehensive control strategy and optimum capacity collocation method, comprise the following steps：A, the step of optimum organization to voltage power-less automatically controls；B, the step of configuration calculates is carried out to the optimum capacity of the idle control of distribution.Using the present invention, consider difficult point existing for current power distribution network voltage ＆ var control, can to distribution voltage with it is idle control integrated control strategy, power distribution network is idle, and optimum capacity configures, improve the power supply capacity of power distribution network.
Description
Technical field
The present invention relates to GA for reactive power optimization technology, more particularly to a kind of distribution reactive comprehensive control strategy to hold with optimal
Collocation method is measured, suitable for distribution network voltage and idle Comprehensive Control, optimum capacity configuration and power distribution network energy efficiency evaluation.
Background technology
Control that conventional voltage is idle is mostly locally to automatically control, by monitoring this ground voltage, active power, reactive power,
Regulation transformer gear or capacitor switch make voltage and reactive power be located in acceptability limit.
At present, the research of almost all of control method and strategy is just for substation level and above power network, to 10kV
And the research of level below power network is seldom.Because current distribution network automated, intelligence degree is far below power transmission network, monitoring point and
Controllable dot ratio is low, and implementing voltage ＆ var control to power distribution network has following difficult point：
1) power distribution network is multi-point and wide-ranging, and load type is various, operational monitoring data can be used less, traditional the whole network unified Modeling meter
The mode amount of calculation of calculation reaches, and algorithm is complicated, and time-consuming.
2) the bad equipment of running status can only pass through adjacent power network phase because itself is uncontrollable or is unsatisfactory for operation condition
Closing device action improves its running status.Such as No-load changer distribution transforming, during lower voltage limit, circuit pressure regulator or master can only be passed through
Becoming pressure regulation improves its voltage level.
3) after control command performs, due to the correlation between different voltage class, regional power grid, easily attend to one thing and lose sight of another
The problem of.Can be qualified by the power distribution voltage adjustment of Over High-Limit Voltage although lowering voltage such as main transformer, original may be caused simultaneously
The power distribution voltage of incoming call pressing lattice gets over lower limit.
4) device action should will also ask, easily cause according to local measurement information according to the coordination of the superior and the subordinate's power network
Device action vibrates.Such as low-voltage platform area user's low voltage, voltage is raised in distribution transforming belonging to request, but may cause again after raising and match somebody with somebody
Become local Over High-Limit Voltage.
The content of the invention
In view of this, it is a primary object of the present invention to provide a kind of distribution reactive comprehensive control strategy with optimum capacity to match somebody with somebody
Method is put, considers difficult point existing for current power distribution network voltage ＆ var control, to distribution voltage and idle control Comprehensive Control
Strategy, power distribution network is idle, and optimum capacity is configured, to improve the power supply capacity of power distribution network.
To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：
A kind of distribution reactive comprehensive control strategy and optimum capacity collocation method, comprise the following steps：
A, the step of optimum organization to voltage power-less automatically controls；
B, the step of configuration calculates is carried out to the optimum capacity of the idle control of distribution.
Wherein：When not considering power factor, the step A includes：
It is A1, voltage, idle qualified, it is failure to actuate；
A2, voltage are high, idle qualified, and gear subtracts one grade；When gear on earth, if there is capacitor throwing, cut one group of electric capacity
Device, otherwise abandon；
A3, voltage is high, idle deficient benefit, and gear subtracts one grade；When gear on earth, then abandon；
A4, voltage is qualified, idle deficient benefit, if voltage is less than (UB+UI)/2, then throw a group capacitor；
A5, voltage is low, idle deficient benefit, puts into capacitor；If capacitor is thrown entirely, gear rises one grade；
A6, voltage are low, idle qualified, and gear rises one grade；Abandoned if gear to top；
A7, voltage are low, are mended without merits and demerits, and gear rises one grade；Abandoned if gear to top；
A8, voltage are qualified, are mended without merits and demerits, if voltage is more than (UB+UI)/2, and there is capacitor throwing, then cut one group of electric capacity
Device；
A9, voltage are high, are mended without merits and demerits, if capacitor is being thrown, cut a group capacitor；If capacitor complete resection, shelves
Position subtracts one grade.
The step B includes：
B1, using year pure benefit as the maximum object function as preferred plan, and establish with this mathematical modeling of optimization；
B2, the master control capacity of power distribution network are QCKvar, if expense needed for every kilowatt of capacity is K members, then total cost is KQC
Member；As service life n, and when being i in view of rate of return on investment, it is equivalent to being used for the idle expense NF controlled every year then：
NF=KQCi(1+i)n/[(1+i)n-1]+QCf+QCΔPCth
Wherein：F is the maintenance cost (unit of every kilowatt of capacity：Member/kvar)；T is year hours of operation (unit：h)；H is
Total rate of electricity (unit：Member/kwh)；ΔPCFor every kilowatt of control capability power attenuation value (unit：kw/kvar).
Wherein, when considering power factor, the step A includes：
A1 ', voltage, idle qualified, if power factor is more than the power factor upper limit of setting, and capacitor is being thrown, then
Cut a group capacitor；
A2 ', voltage are high, idle qualified, and gear subtracts one grade；
A3 ', voltage is high, idle deficient benefit, and gear subtracts one grade；
A4 ', voltage is qualified, idle deficient benefit, if voltage is more than (UH+UL)/2, and power factor is less than under setting power factor
Limit, then subtract one grade；If voltage is less than (UH+UL)/2, and power factor is less than setting power factor lower limit, then throws a group capacitor；
A5 ', voltage is low, idle deficient benefit, throws a group capacitor；If capacitor is thrown entirely, gear rises one grade；
A6 ', voltage are low, idle qualified, and gear rises one grade；
A7 ', voltage are low, are mended without merits and demerits, and gear rises one grade；
A8 ', voltage are qualified, are mended without merits and demerits；If voltage is more than (UH+UL)/2, gear rise one grade；If voltage is more than (UH+
UL)/2, and there is capacitor throwing, cutting a group capacitor；
A9 ', voltage are high, are mended without merits and demerits, if capacitor is being thrown, cut a group capacitor；Otherwise gear subtracts one grade.
The step B includes：
B1, using year pure benefit as the maximum object function as preferred plan, and establish with this mathematical modeling of optimization；
B2, the master control capacity of power distribution network are QCKvar, if expense needed for every kilowatt of capacity is K members, then total cost is KQC
Member；As service life n, and when being i in view of rate of return on investment, it is equivalent to being used for the idle expense NF controlled every year then：
NF=KQCi(1+i)n/[(1+i)n-1]+QCf+QCΔPCth
Wherein：F is the maintenance cost (unit of every kilowatt of capacity：Member/kvar)；T is year hours of operation (unit：h)；H is
Total rate of electricity (unit：Member/kwh)；ΔPCFor every kilowatt of control capability power attenuation value (unit：kw/kvar).
Distribution reactive comprehensive control strategy provided by the present invention and optimum capacity collocation method, have advantages below：
Using the present invention, by optimal reactive power allocation, reasonable disposition and throwing, cut distribution net reactive power source, can realize optimal
Reactive power is distributed, and reduces power distribution network running wastage, rate of qualified voltage is improved, so as to improve the power supply capacity of power distribution network.
Brief description of the drawings
Fig. 1 is that distribution voltage reactive comprehensive controls nine-zone graph；
Fig. 2 is that the optimum capacity of the idle control of distribution configures computing block diagram.
Embodiment
Below in conjunction with the accompanying drawings and embodiments of the invention are to distribution reactive comprehensive control strategy and optimum capacity of the invention
Collocation method is described in further detail.
The present invention distribution voltage with it is idle control integrated control strategy, power distribution network is idle, and optimum capacity collocation method follows
Principle be：
1) first adjust idle, adjust voltage afterwards.Reactive balance is electric energy transmission, conversion with maintaining electrical equipment normal operation
Basic condition.,, will necessarily in order to maintain reactive power equilibrium during load variations simultaneously from reactive voltage characteristic curve
New reactive balance point is formed, causes equipment working voltage to produce change.Therefore, the idle coordination control of distribution network voltage should be adjusted first
Save idle, adjust voltage afterwards.
2) it is idle to judge from top to bottom, control from bottom to top.The unsuitable long-distance sand transport of reactive power, for reactive power
Distribution, it should be carried out according to the principle of in-situ balancing, dispersion compensation, reduction reactive power consumption point absorbs idle from higher level's power network as far as possible
Power, reduce idle flowing in the line.Therefore, it is idle to judge from top to bottom.If higher level's power network has reactive-load compensation
Demand, should first check for subordinate's electric network reactive-load whether in-situ balancing, subordinate's power network can not meet compensation require in the case of, then
Form the control command locally compensated.And the execution of control command should be carried out step by step from bottom to top, it can so meet local nothing
Work(demand, and can reduce the idle flowing in power network, reduce network loss to greatest extent.
3) voltage judges from bottom to top, controls from top to bottom.Power distribution network low-voltage customer end can not realize local pressure regulation, can only
Act and realize by higher level's regulator.Most regional on-load voltage regulation distribution transformings and circuit pressure regulator negligible amounts at present.With modified tone
Pressure relies primarily on the action of main transformer tap and completed, i.e., in 10kV circuits most voltages do not conform to lattice point adjustment be required for step by step to
Upper application.Therefore, it should judge whether voltage needs to adjust step by step from bottom to top.When carrying out voltage adjustment, higher level's voltage adjusting device
Action is larger to subordinate equipment voltage influence, and adjustment is wide；And subordinate's voltage adjusting device is acted to higher level equipment voltage influence very little,
Adjustment face is narrow, therefore should perform pressure regulation instruction step by step from top to bottom.
Fig. 1 is that distribution voltage reactive comprehensive controls nine-zone graph.The distribution voltage and reactive comprehensive control method of the present invention is such as
Under：
As shown in figure 1, the operating voltage of distribution, idle parameter can be divided into 0~8 totally nine regions.Nine-zone graph is with electricity
It is abscissa to press as ordinate, reactive power.U in figureH、ULRespectively set distribution voltage upper limit setting valve and lower limit are whole
Definite value, QH、QLIt is then the upper limit setting valve and lower limit setting valve of the reactive power lagged.
The gear ascending, descending for being adjusted to distribution transformer of distribution voltage, the control of reactive power are divided into packet and throw, cut fixation
The power capacitor of capacity.On the other hand, the optimum organization of voltage power-less, which automatically controls, can use following control method, including (do not examine
When considering power factor)：
Step 11：It is voltage, idle qualified, it is failure to actuate.
Step 12：Voltage is high, idle qualified, and gear subtracts one grade.When gear on earth, if there is capacitor throwing, cut one group
Capacitor, otherwise abandon.
Here, the concept thrown, cut, represent that the on-off of control device (is switched, connect in reactive power compensation technology
Tentaculum etc.)；Represent as input part capacitance (electric capacity is accessed into circuit) or cut-out electricity are made in the change of circuit power rate
The operation of capacity (disconnecting electric capacity and circuit), it functions as operation power Power Factor Controller.
Step 13：Voltage is high, idle deficient benefit, and gear subtracts one grade (gear on earth, is abandoned).
Step 14：Voltage is qualified, idle deficient benefit, if voltage is less than (UH+UL)/2, then throw a group capacitor.
Step 15：Voltage is low, idle deficient benefit, input capacitor (if capacitor is thrown entirely, gear rises one grade).
Step 16：Voltage is low, idle qualified, and gear rises one grade (gear is then abandoned to top).
Step 17：Voltage is low, is mended without merits and demerits, and gear rises one grade (gear is then abandoned to top).
Step 18：Voltage is qualified, is mended without merits and demerits, if voltage is more than (UH+UL)/2, and there is capacitor throwing, then cut one group of electricity
Container.
Step 19：Voltage is high, is mended without merits and demerits, if capacitor is being thrown, cuts a group capacitor (capacitor complete resection, shelves
Position subtracts one grade).
If considering power factor, distribution voltage reactive comprehensive control method, following steps can be used：
Step 11 '：Voltage, idle qualified, if power factor is more than the power factor upper limit of setting, and capacitor exists
Throw, then cut a group capacitor (otherwise not controlling).
Step 12 '：Voltage is high, idle qualified, and gear subtracts one grade, and (gear on earth, if there is capacitor throwing, cuts one group of electricity
Container, otherwise abandon).
Step 13 '：Voltage is high, idle deficient benefit, and gear subtracts one grade (gear on earth, is abandoned).
Step 14 '：Voltage is qualified, idle deficient benefit, if voltage is more than (UH+UL)/2, and power factor be less than setting power because
Number lower limits, then subtract one grade (if voltage is less than (UH+UL)/2, and power factor is less than setting power factor lower limit, then throws one group of electricity
Container).
Step 15 '：Voltage is low, idle deficient benefit, throws a group capacitor (if capacitor is thrown entirely, gear rises one grade).
Step 16 '：Voltage is low, idle qualified, and gear rises one grade (gear is then abandoned to top).
Step 17 '：Voltage is low, is mended without merits and demerits, and gear rises one grade (gear is then abandoned to top).
Step 18 '：Voltage is qualified, is mended without merits and demerits, if voltage is more than (UH+UL)/2, gear rise one grade (if voltage is more than (UH
+UL)/2, and there is capacitor throwing, cutting a group capacitor).
Step 19 '：Voltage is high, is mended without merits and demerits, if capacitor is being thrown, cutting a group capacitor, (otherwise gear subtracts one grade, shelves
Then abandon on earth position).
Fig. 2 is that the optimum capacity of the idle control of distribution configures computing block diagram.The idle control capability of distribution of the present invention is most
Good configuration process, comprises the following steps：
Step 21：In order to determine the preferred plan of the idle control of power distribution network, preferred plan is used as using year pure benefit as maximum
Object function, and establish with this mathematical modeling of optimization.
Step 22：The master control capacity of known power distribution network is QC(kvar), if expense needed for every kilowatt of capacity is K members, then
Total cost is KQCMember.As service life n, and when being i in view of rate of return on investment, then equivalent to being used for idle control every year
Expense NF be：
NF=KQCi(1+i)n/[(1+i)n-1]+QCf+QCΔPCth
Wherein：F is the maintenance cost (unit of every kilowatt of capacity：Member/kvar)；T is year hours of operation (unit：h)；H is
Total rate of electricity (unit：Member/kwh)；ΔPCFor every kilowatt of control capability power attenuation value (unit：kw/kvar).
When seeking optimum control scheme, it can be carried out by the way of multi-scheme compares, the starting scheme of selection is first right
The scheme of each load point configuration control capability, i.e.,：
QC=QC1, QC2..., QCN
The control capability of node 1 can be removed, i.e.,：
QC=0, QC2..., QCN
Each relatively scheme can be obtained successively, and k-th of scheme control capability should be：
QC=0...0 (k 0), QC (k=1), QC (k=2)..., QN
N number of relatively scheme, and calculate the control node number, control capability, annual fee of each scheme respectively is according to said method obtained
With, the Spring Festival holidays electricity charge, year net earnings and the power distribution network outlet power factor value under the control program.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.
Claims (1)
1. a kind of distribution reactive comprehensive control strategy and optimum capacity collocation method, it is characterised in that comprise the following steps：
A, the step of optimum organization to voltage power-less automatically controls；
B, the step of configuration calculates is carried out to the optimum capacity of the idle control of distribution；
The step B includes：
B1, using year pure benefit as the maximum object function as preferred plan, and establish with this mathematical modeling of optimization；
B2, the master control capacity of power distribution network are QckvarIf expense needed for every kilovar capacity is K members, then total cost is KQcMember；
As service life n, and when being i in view of rate of return on investment, it is equivalent to being used for the idle expense NF controlled every year then：
NF=KQci(1+i)n/[(1+i)n-1]+Qcf+QcΔPcth
Wherein：F is the maintenance cost (unit of every kilovar capacity：Member/kvar)；T is year hours of operation (unit：h)；H is synthesis
Electricity price (unit：Member/kwh)；ΔPcFor every kilovar control capability power attenuation value (unit：kw/kvar)；
Wherein, when not considering power factor, the step A includes：
It is A1, voltage, idle qualified, it is failure to actuate；
A2, voltage are high, idle qualified, and gear subtracts one grade；When gear on earth, if there is capacitor throwing, cut a group capacitor, it is no
Then abandon；
A3, voltage is high, idle deficient benefit, and gear subtracts one grade；When gear on earth, then abandon；
A4, voltage is qualified, idle deficient benefit, if voltage is less than (UH+UL)/2, then throw a group capacitor；
A5, voltage is low, idle deficient benefit, puts into capacitor；If capacitor is thrown entirely, gear rises one grade；
A6, voltage are low, idle qualified, and gear rises one grade；Abandoned if gear to top；
A7, voltage are low, are mended without merits and demerits, and gear rises one grade；Abandoned if gear to top；
A8, voltage are qualified, are mended without merits and demerits, if voltage is more than (UH+UL)/2, and there is capacitor throwing, then cut a group capacitor；
A9, voltage are high, are mended without merits and demerits, if capacitor is being thrown, cut a group capacitor；If capacitor complete resection, gear subtract
One grade；
Wherein, UH、ULRespectively set distribution voltage upper limit setting valve and lower limit setting valve；
Wherein, when considering power factor, the step A includes：
A1 ', voltage, idle qualified, if power factor is more than the power factor upper limit of setting, and capacitor is being thrown, then cuts one
Group capacitor；
A2 ', voltage are high, idle qualified, and gear subtracts one grade；
A3 ', voltage is high, idle deficient benefit, and gear subtracts one grade；
A4 ', voltage is qualified, idle deficient benefit, if voltage is more than (UH+UL)/2, and power factor is less than setting power factor lower limit,
Then subtract one grade；If voltage is less than (UH+UL)/2, and power factor is less than setting power factor lower limit, then throws a group capacitor；
A5 ', voltage is low, idle deficient benefit, throws a group capacitor；If capacitor is thrown entirely, gear rises one grade；
A6 ', voltage are low, idle qualified, and gear rises one grade；
A7 ', voltage are low, are mended without merits and demerits, and gear rises one grade；
A8 ', voltage are qualified, are mended without merits and demerits；If voltage is more than (UH+UL)/2, gear rise one grade；If voltage is more than (UH+UL)/2, and
There is capacitor throwing, cutting a group capacitor；
A9 ', voltage are high, are mended without merits and demerits, if capacitor is being thrown, cut a group capacitor；Otherwise gear subtracts one grade；
Wherein, UH、ULRespectively set distribution voltage upper limit setting valve and lower limit setting valve.
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| CN105162129B (en) * | 2015-10-23 | 2017-11-24 | 国家电网公司 | Meter and the distribution reactive voltage control method of distributed power source allocation optimum |
| CN106130027B (en) * | 2016-06-30 | 2019-06-04 | 广州市奔流电力科技有限公司 | Two-dimensional comprehensive treatment method for voltage of low-voltage distribution transformer area |
| CN110266015B (en) * | 2019-07-12 | 2021-01-22 | 国网山东省电力公司临沂供电公司 | Reactive voltage emergency coordination control device and control method |
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| CN101540509A (en) * | 2009-01-12 | 2009-09-23 | 杭州德力西集团有限公司 | Voltage reactive power control method of substation |
| US7923862B2 (en) * | 2009-10-06 | 2011-04-12 | General Electric Company | Reactive power regulation and voltage support for renewable energy plants |
| CN104078988A (en) * | 2014-07-17 | 2014-10-01 | 武汉大学 | Voltage reactive treatment system and method for power distribution network area |
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