CN106786633B - The collocation method and reactive voltage adjusting means of reactive voltage adjusting means - Google Patents
The collocation method and reactive voltage adjusting means of reactive voltage adjusting means Download PDFInfo
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- CN106786633B CN106786633B CN201710183243.7A CN201710183243A CN106786633B CN 106786633 B CN106786633 B CN 106786633B CN 201710183243 A CN201710183243 A CN 201710183243A CN 106786633 B CN106786633 B CN 106786633B
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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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- 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 collocation method of reactive voltage adjusting means and reactive voltage adjusting means.The collocation method of above-mentioned reactive voltage adjusting means, comprises the following steps：Maximum load current of the low-voltage circuit in the first setting time section where obtaining reactive voltage adjusting means mount point；The phase voltage of installation taiwan area low-voltage circuit where obtaining the reactive voltage adjusting means；The configuration capacity of reactive voltage adjusting means is calculated according to the maximum load current, phase voltage and capacity configuration formula；Wherein, the capacity configuration formula is：S=α AQKUNILmax；In formula, α be installation taiwan area low-voltage circuit the number of phases, AQTo promote to increase coefficient, K is nargin coefficient, UNFor phase voltage, ILmaxThe maximum load current of low-voltage circuit where mount point；The capacity of voltage regulator module in the reactive voltage adjusting means is configured according to the configuration capacity；It makes the configuration of above-mentioned reactive voltage adjusting means more accurate, effectively increases the allocative effect of reactive voltage adjusting means.
Description
Technical field
The present invention relates to technical field of electric power, collocation method more particularly to a kind of reactive voltage adjusting means and idle
Voltage regulating device.
Background technology
As household electrical appliance are in the popularization of every family, the power demand more and more higher of all types of user, due to rural area etc.
Non- Urban Areas power load development underestimates, and non-Urban Areas power distribution network generally existing capacity of distribution transform deficiency and
The problems such as wire diameter is meticulous, voltage is seriously relatively low when causing peak times of power consumption.In addition, non-Urban Areas living standard gradually carries
Height, everywhere building increase and lack planning property, it is understood that there may be situation of the former stand from being changed into remote load center in load center,
Aggravate power distribution network terminal temperature difference low voltage problem.
In the case of power distribution network terminal voltage is seriously relatively low, most of electrical equipment can not be normally-open, now distribution transformer
The maximum load when maximum load detected is part electric operation, that is to say, that be due to that low-voltage causes user many
Obtained from equipment can not open in peak period " pseudo- data ".After reactive voltage adjusting means puts into operation, user's voltage
Recover normal, the high-power electric appliance of user can be with normally-open, and the peak constrained for a long time by low-voltage problem before causing is born
Lotus is released, and maximum load now will exceed well over the long-term data for measuring and counting in the past.Reactive voltage regulation dress
The correct configuration for putting capacity has decisive role to reactive voltage adjustment work, however, traditional reactive voltage adjusting means
Configuration be typically with the maximum load surveyed to determine the configuration capacity of reactive voltage adjustment equipment, allocative effect is poor.
The content of the invention
Based on this, it is necessary to the technical problem for traditional scheme to the allocative effect difference of reactive voltage adjusting means, carry
For the collocation method and reactive voltage adjusting means of a kind of reactive voltage adjusting means.
A kind of collocation method of reactive voltage adjusting means, comprises the following steps：
Peak load electricity of the low-voltage circuit where obtaining reactive voltage adjusting means mount point in the first setting time section
Stream；
The phase voltage of installation taiwan area low-voltage circuit where obtaining the reactive voltage adjusting means；
The configuration of reactive voltage adjusting means is calculated according to the maximum load current, phase voltage and capacity configuration formula
Capacity；Wherein, the capacity configuration formula is：S=α AQKUNILmax；In formula, α is the number of phases, AQTo promote to increase coefficient, K is nargin system
Number, UNFor phase voltage, ILmaxThe maximum load current of low-voltage circuit where device mount point；
The capacity of voltage regulator module in the reactive voltage adjusting means is configured according to the configuration capacity.
The collocation method of above-mentioned reactive voltage adjusting means, low pressure where reactive voltage adjusting means mount point can be obtained
Installation taiwan area low pressure where maximum load current of the circuit in the first setting time section, and above-mentioned reactive voltage adjusting means
The phase voltage of circuit, the configuration capacity of reactive voltage adjusting means is calculated with this, configured according to above-mentioned configuration capacity described idle
Voltage regulator module in voltage regulating device, make the configuration of above-mentioned reactive voltage adjusting means more accurate, effectively increase nothing
The allocative effect of work(voltage regulating device.
A kind of reactive voltage adjusting means, including voltage regulator module and reactive compensation module；The two of the voltage regulator module
Secondary side includes bucking coil, and the reactive compensation module includes multiple unit capacitor；One end of the voltage regulator module primary side connects
Signal input part is connect, the other end of voltage regulator module primary side connects zero line side, the bucking coil of voltage regulator module secondary side
First end connects signal input part, one end of the second end connection reactive compensation module of bucking coil, the 3rd end of bucking coil
Connect the other end of reactive compensation module, one end connection signal output part of the reactive compensation module, the reactive-load compensation mould
The other end connection zero line side of block；
Before reactive voltage regulation, low-voltage circuit where obtaining reactive voltage adjusting means mount point is when first sets
Between maximum load current in section；
The phase voltage of installation taiwan area low-voltage circuit where obtaining the reactive voltage adjusting means；
The configuration of reactive voltage adjusting means is calculated according to the maximum load current, phase voltage and capacity configuration formula
Capacity；Wherein, the capacity configuration formula is：S=α AQKUNILmax；In formula, α be installation taiwan area low-voltage circuit the number of phases, AQFor
Promote to increase coefficient, K is nargin coefficient, UNFor phase voltage, ILmaxThe maximum load current of low-voltage circuit where device mount point；
The capacity of the voltage regulator module is configured according to the configuration capacity.
Above-mentioned reactive voltage adjusting means, voltage regulator module therein and reactive compensation module are carried out accurately connecting respectively
Connect, identified voltage regulator module capacity has higher accuracy, is advantageous to improve the idle electricity of reactive voltage adjusting means
Press regulating effect.
Brief description of the drawings
Fig. 1 is the collocation method flow chart of the reactive voltage adjusting means of one embodiment；
Fig. 2 is the reactive voltage adjusting means structural representation of one embodiment；
Fig. 3 is the conspectus of the distribute-electricity transformer district of one embodiment；
Fig. 4 is the reactive voltage adjusting means structural representation of one embodiment.
Embodiment
Below in conjunction with the accompanying drawings to the collocation method and reactive voltage adjusting means of the reactive voltage adjusting means of the present invention
Embodiment is described in detail.
With reference to figure 1, Fig. 1 show the collocation method flow chart of the reactive voltage adjusting means of one embodiment, including such as
Lower step：
S51, maximum of the low-voltage circuit in the first setting time section is born where obtaining reactive voltage adjusting means mount point
Charged current；
The structural representation of above-mentioned reactive voltage adjusting means can be with as shown in Fig. 2 including the first A.C. contactor 27,
Two A.C. contactors 29, the 3rd A.C. contactor 28, voltage regulator module 10, reactive compensation module 21, compensating switch 22, electric capacity
31st, controller 26 and communication module 36.The secondary side of above-mentioned voltage regulator module 10 includes bucking coil 11, reactive compensation module
21 include multiple unit capacitor, and the second A.C. contactor 29 is connected between input and output end, voltage regulator module 10 and idle
The output end of compensating module 21 is in parallel, and input passes sequentially through compensating switch 22 and electric capacity 31 is grounded, above-mentioned first ac contactor
Device 27 is connected between input and bucking coil 11, the 3rd A.C. contactor 28 be connected to bucking coil 11 and output end it
Between, controller noted above 26 connects voltage regulator module 10 and reactive compensation module 21 respectively, to above-mentioned voltage regulator module 10 and idle
Compensating module 21 is configured accordingly, and controller noted above 26 is also by communication module 36 with outside control device (as serviced
Stand or a distant place control main website etc.) it is communicatively coupled.Above-mentioned voltage regulator module 10 is to connect with the low-voltage circuit for installing taiwan area
Relation, and reactive compensation module 21 and the low-voltage circuit of installation taiwan area are parallel relationships.The erecting bed of reactive voltage adjusting means
Area can be determined according to distribution network line with electrical feature, and the specific position of reactive voltage adjusting means is installed in above-mentioned installation taiwan area
It is set to the mount point of reactive voltage adjusting means.
Reactive voltage adjusting means has corresponding erecting bed according to the physical circuit feature of corresponding distribution network line end
Area, according to above-mentioned installation taiwan area and the corresponding feature of distribution network line end can be answered to enter above-mentioned reactive voltage adjusting means
Row configuration, to ensure the allocative effect to reactive voltage adjusting means.Above-mentioned first setting time section can be according to distribution netting twine
The power utilization environment feature of road end is configured, and could be arranged to be currently configured the period such as nearest 1 year of the time.
S52, the phase voltage of installation taiwan area low-voltage circuit where obtaining the reactive voltage adjusting means；
Usually, the line voltage of above-mentioned low-voltage circuit can be 0.4kV (kilovolt), and corresponding phase voltage can be
0.22kV.The collocation method of above-mentioned reactive voltage adjusting means is applied to 0.4kV low pressure level.
In one embodiment, distribution network line end mesolow line where the above-mentioned acquisition reactive voltage adjusting means
The process of the phase voltage on road can include：
The line voltage of installation taiwan area low-voltage circuit where measuring the reactive voltage adjusting means；
The phase voltage of low-voltage circuit is calculated according to the line voltage and phase voltage calculation formula；Wherein, the phase voltage meter
Calculating formula is：UIRepresent line voltage, UNRepresent phase voltage.
The line voltage that the present embodiment obtains according to measurement determines the phase voltage of low-voltage circuit, has identified phase voltage
Higher accuracy.
S53, reactive voltage adjusting means is calculated according to the maximum load current, phase voltage and capacity configuration formula
Configuration capacity；Wherein, the capacity configuration formula is：S=α AQKUNILmax；In formula, α is the number of phases of installation taiwan area low-voltage circuit,
AQTo promote to increase coefficient, K is nargin coefficient, UNFor phase voltage, ILmaxThe maximum load current of low-voltage circuit where mount point；
Above-mentioned number of phases α can determine according to the phase attributes feature of circuit where reactive voltage adjusting means, promote to increase coefficient
AQInterval can be [1.8,2.0], above-mentioned symbol [] represents closed interval, and its implication is to be installed additional in 0.4kV low-voltage circuits
After reactive voltage adjusting means, user side voltage is improved, now because the workload demand that low-voltage problem suppresses can manifest
Come, cause workload demand to increase, therefore recruit depressor module capacity when to consider load promote increase phenomenon.If the first setting time section
To be currently configured nearest 1 year of the time, then ILmaxFor the reactive voltage adjusting means mount point peak load of nearest 1 year electricity
Stream.
In one embodiment, the interval that above-mentioned rush increases coefficient can be [1.8,2.0]；Above-mentioned nargin coefficient takes
It is [1.3,1.5] to be worth section；
It is above-mentioned that reactive voltage adjusting means is calculated according to the maximum load current, phase voltage and capacity configuration formula
Before the process of configuration capacity, it can also include：
If the reactive voltage adjusting means is arranged in three-phase circuit, α is arranged to 3；If the reactive voltage is adjusted
Regulating device is arranged in single-phase circuit, then α is arranged into 1.
If the reactive voltage adjusting means is arranged in three-phase circuit, phase coefficient is arranged to 3；Now, capacity
Allocation formula is：SQS=3AQKUNILmax；If the reactive voltage adjusting means is arranged in single-phase circuit, by phase coefficient
It is arranged to 1；Now, capacity configuration formula is：SQD=AQKUNILmax。
S54, the capacity of voltage regulator module in the reactive voltage adjusting means is configured according to the configuration capacity.
Configuration capacity configuration includes voltage regulator module parallel with one another and reactive compensation module, and above-mentioned steps can be accurately real
Now to the configuration of capacity needed for voltage regulator module.
The collocation method of reactive voltage adjusting means provided by the invention, reactive voltage adjusting means mount point can be obtained
Installed where maximum load current of the place low-voltage circuit in the first setting time section, and above-mentioned reactive voltage adjusting means
The phase voltage of taiwan area low-voltage circuit, the configuration capacity of reactive voltage adjusting means is calculated with this, configured according to above-mentioned configuration capacity
Voltage regulator module in the reactive voltage adjusting means, make the configuration of above-mentioned reactive voltage adjusting means more accurate, effectively
Improve the allocative effect of reactive voltage adjusting means.
In one embodiment, the collocation method of above-mentioned reactive voltage adjusting means, can also include：
Determine that the reactive compensation module switching to the reactive voltage is adjusted according to the setting ratio of the configuration capacity
The capacity of device；Wherein, the reactive compensation module is connected in parallel on the output end of the voltage regulator module；The reactive compensation module
Including multiple unit capacitor.
Above-mentioned reactive compensation module can include multiple unit capacitor, and reactive compensation module can access idle electricity by controlling
The capacitor bank numerical control switching of adjusting means is pressed to the volume controlled of the reactive voltage adjusting means.
As one embodiment, the scope of above-mentioned setting ratio is [25%, 35%].
Specifically, during the actual disposition of reactive voltage adjusting means, the group forming criterion of capacitor can be with solution
Certainly based on low-voltage circuit low voltage problem, solves the problems, such as three-phase imbalance as pair, therefore the capacitor of reactive compensation module can
To be divided to two groups, one group of realization compensates altogether, and another set realizes that point the ratio between a benefit compensation, both capacity could be arranged to 2:1.
The present embodiment determines reactive compensation module switching to described idle according to [25%, 35%] of voltage regulator module capacity
The capacity of voltage regulating device, the effectively perfect configuration process of reactive voltage adjusting means.
In one embodiment, the collocation method of above-mentioned reactive voltage adjusting means, can also include：
N times sampling is carried out to the output signal of the reactive voltage adjusting means, obtains N number of sampling corresponding to output signal
Voltage；
The voltage wave of reactive voltage adjusting means installation taiwan area is calculated according to the sampled voltage and stability bandwidth calculation formula
Dynamic rate；Wherein, the stability bandwidth calculation formula is：
In formula, VB% is voltage fluctuation rate, ViFor the electricity of ith sample voltage, i.e. ith sample moment final mount point
Pressure, VNFor low-voltage circuit rated voltage, i is the integer more than or equal to 1 and less than or equal to N；
During gear regulation, the gear number and span of voltage regulator module are determined according to the voltage fluctuation rate.
Above-mentioned N can be determined according to the specific features of corresponding distribution network line end, for example be defined as 1000 equivalences.
It is above-mentioned that the gear number of voltage regulator module and the mistake of span are determined according to the voltage fluctuation rate as one embodiment
Journey can include：
Detect the installation taiwan area and whether there is distributed power source in the second setting time section；
If the installation taiwan area has distributed power source in the second setting time section, formula is adjusted according to the first gear
Determine the gear number and span during the regulation of voltage regulator module gear；
If distributed power source is not present in the installation taiwan area in the second setting time section, adjusted according to the second gear public
Formula determines the gear number and span during the regulation of voltage regulator module gear.
As one embodiment, above-mentioned first gear regulation formula includes：
VBDuring % ＞ 1, D=± 2m, J=2.5%；
0≤VBDuring %≤1, D=± m, J=5.0%；
The second gear regulation formula includes：
VBDuring % ＞ 1, D=-2m, J=2.5%；
0≤VBDuring %≤1, D=-m, J=5.0%；
In formula, D represents gear number, and m represents gear threshold value, and J represents span.
Above-mentioned second setting time section can be defined as a following longer period, such as this time of the five-year
Section.If it is described installation taiwan area distributed power source be present in the second setting time section, can by the gear of voltage regulator module to
Up-regulation (take+number) or to lowering (take-number).Under normal circumstances, if the output voltage of reactive voltage adjusting means is less than reference
Magnitude of voltage, then by the gear of voltage regulator module to downward, if the output voltage of reactive voltage adjusting means is more than reference voltage level,
Then the gear of voltage regulator module can be determined to up-regulation, above-mentioned reference voltage level according to the concrete model of voltage regulator module.If
Distributed power source is not present in the installation taiwan area in the second setting time section, then only need to be downward by the gear of voltage regulator module
Adjust, be effectively simplified the gear regulation process of voltage regulator module.
In the application process of reality, above-mentioned reactive voltage adjusting means may be mounted in 0.4kV low-voltage circuits.It is idle
Mount point of the voltage regulating device in 0.4kV low-voltage circuits, which chooses process, to be included：Obtain and respectively match somebody with somebody in 0.4kV low-voltage circuits
Become the transformer capacity of taiwan area, low-voltage customer complains situation and low voltage terminal voltage condition；To meet low-voltage judgment principle
Installation taiwan area of the taiwan area as adjuster；According to selected taiwan area transformer capacity, the low-voltage origin cause of formation, pre-selection mount point and circuit
The voltage and three-phrase burden balance situation of terminal temperature difference determine final mount point.
It is determined that after mount point, maximum load current of the final mount point in nearly 1 year can be obtained, utilizes adjuster
Capacity method for optimizing obtains its configuration capacity；Its pressure regulator gear and electric capacity for being related to is determined according to adjuster stepping group technology
Device group number.
The configuration of above-mentioned reactive voltage adjusting means is referred to as low-voltage reactive power voltage integrated adjuster (low-
Voltage reactive power voltage regulator, LRVR), refer to a kind of low-voltage reactive power voltage adjuster,
Mainly it is made up of voltage regulator module, reactive compensation module, coordinating control module (controller) and communication module, structural representation
It may be referred to shown in Fig. 2, mainly solving the problems, such as low-voltage circuit low-voltage and three-phase load unbalance.
Above-mentioned LRVR operation principle can include：Voltage regulator module coil is connected in the line, and electricity is inputted when detecting
When pressing through low, voltage regulator module automatic start, boosted step by step according to the numerical value for actually entering voltage, output voltage is met load
Normal work, and the reactive-load compensation of reactive-load compensation capacitor input respective numbers, to the inductive reactive power on compensated line, drop
The low line loss caused by reactive current and pressure drop.When detecting that input voltage is higher than setting value (upper voltage limit), pressure regulation
Device module then according to the numerical value step pressure reducing for actually entering voltage, makes output voltage control in target zone.
In the configuration process of reactive voltage adjusting means, low-voltage judgment principle can be used, above-mentioned low-voltage judges
Principle refers to that distribute-electricity transformer district low-voltage circuit occurred three-phase voltage in 1 year and is less than the qualified lower limit V of voltageSlimNumber of days add up
More than Tlim, or single-phase voltage is less than the qualified lower limit V of voltageDlimNumber of days it is accumulative more than Tlim.Preferably, TlimValue
Section is [30,40], and unit is day, and interval " [] " containing bracket all thinks to obtain two end points in the present invention
Value, such as TlimSpan be more than or equal to 30 days, and less than or equal to 40 days.For 0.4kV low-voltage circuits, VSlimTake
354.3V, VDlimTake 198V.
Can be according to selected taiwan area transformer capacity, the low-voltage origin cause of formation, pre-selection mount point and the voltage of line end user
And three-phrase burden balance situation determines final mount point, specific determination process includes：Understand the basic condition of the taiwan area, with
Determine whether transformer capacity meets actual load demand, if seriously overload can first change transformer for distribution transforming；If three-phase be present
Voltage is seriously uneven, can first carry out phase modulation.Final mount point should be in low-voltage user front end and near the electricity of user side
On bar.Terminal voltage is relatively low caused by radius of electricity supply is long, in peak of power consumption (such as daily 11:00-12:00,17:00-
20:00) household electrical appliance can not normal use when, the mount point place of user's voltage between 170V-200V in peak of power consumption
To be optimal.The configuration at scene and the distribution of low-voltage user are understood, to determine to use single-phase equipment or three-phase equipment.Peace
The region of easily transport and installation equipment can be selected by decorateeing.
By taking the 10kV circuits of certain rural area as an example, the transformer capacity of each distribute-electricity transformer district, low pressure in circuit can be obtained
Customer complaint situation and low voltage terminal voltage condition：Circuit trunk line length 13.8km, wherein total length 18.2km, backbone
Wire type is used as LGJ-95, branch line includes LGJ-70 and LGJ-50 using wire type；Attaching has distribution change to circuit altogether
Depressor 36, total capacity 4860kVA；The taiwan area that low-voltage in circuit be present is obtained according to low-voltage judgment principle；Choosing
Exemplified by taking certain distribution transforming that low-voltage be present, the line parameter circuit value of the distribute-electricity transformer district is as shown in figure 3, according to selected taiwan area transformation
Device capacity, the low-voltage origin cause of formation, pre-selection mount point and voltage and three-phrase burden balance the situation determination of line end user are final
Mount point can be in Fig. 3 at C points, to select three-phase low-voltage Reactive Voltage Comprehensive Adjustment device, its pressure regulator being related to is unidirectional；Obtain
Take maximum load current I of the final mount point in nearly 1 yearLmax, it is 1.5 to set nargin coefficient, promotees to increase coefficient AQFor 2.0, utilize
The collocation method of reactive voltage adjusting means obtains its configuration capacity：ILmax=60A, SQS=118.47kVA, then pressure regulator is optional
120kVA (kilovolt-ampere) capacity model is taken, capacitor can choose 30kvar (kilovar)；It is true according to adjuster stepping group technology
The fixed pressure regulator gear and capacitor bank number that it is related to, wherein, it can be seen from the adjuster mount point historical data of nearest 1 year
Its voltage fluctuation rate VB% is 1.24, therefore corresponding pressure regulator gear may be configured as：Gear number D=± 8, span J=
1.25%；Capacitor is divided to two groups, and one group of realization compensates altogether, capacity 20kvar, and another set realizes a point benefit compensation, and capacity is
10kvar。
The collocation method of reactive voltage adjusting means provided by the invention is history data with reference to low-voltage circuit, low
The voltage origin cause of formation and scene actual conditions, and consider promote increase phenomenon propose low-voltage reactive power voltage regulator capacity it is preferably square
Method, relatively conventional collocation method have more reasonability；According to the situation of voltage fluctuation rate, pressure regulator stepping method, regulation effect are proposed
Fruit more refines, and is suitable for the larger taiwan area demand of load fluctuation.
With reference to shown in figure 4, Fig. 4 is the reactive voltage adjusting means structural representation of one embodiment, including pressure regulator mould
Block 60 and reactive compensation module 71；The secondary side of the voltage regulator module 60 includes bucking coil 61, the reactive compensation module
71 include multiple unit capacitor；One end connection signal input part of the primary side of voltage regulator module 60, voltage regulator module 60 is once
The other end connection zero line side of side, the first end connection signal input part of the bucking coil 61 of the secondary side of voltage regulator module 60, is mended
Repay one end of the second end connection reactive compensation module 71 of coil 61, the three-terminal link reactive compensation module 71 of bucking coil 61
The other end, one end connection signal output part of the reactive compensation module 61, the other end of the reactive compensation module 71 connects
Connecting to neutral line end；Specifically, the low-voltage circuit of voltage regulator module 60 and reactive voltage adjusting means installation taiwan area is series relationship, nothing
Work(compensating module 71 and the low-voltage circuit of installation taiwan area are parallel relationships, and reactive compensation module 71 can be connected in parallel on voltage regulator module
60 output end；
Before reactive voltage regulation, low-voltage circuit (such as low pressure trunk where reactive voltage adjusting means mount point is obtained
Circuit) maximum load current in the first setting time section；
The phase voltage of installation taiwan area low-voltage circuit where obtaining the reactive voltage adjusting means；
The configuration of reactive voltage adjusting means is calculated according to the maximum load current, phase voltage and capacity configuration formula
Capacity；Wherein, the capacity configuration formula is：S=α AQKUNILmax；In formula, α be installation taiwan area low-voltage circuit the number of phases, AQFor
Promote to increase coefficient, K is nargin coefficient, UNFor phase voltage, ILmaxThe maximum load current of low-voltage circuit where mount point；
The capacity of the voltage regulator module 60 is configured according to the configuration capacity；After the completion of voltage regulator module capacity configuration
Reactive voltage regulation is carried out to distribution network line end.
The reactive voltage adjusting means that the present embodiment provides, divides voltage regulator module 60 therein and reactive compensation module 71
Accurate connection has not been carried out, and identified voltage regulator module capacity has higher accuracy, is advantageous to improve reactive voltage tune
The reactive voltage regulating effect of regulating device.
In one embodiment, can be according to the configuration capacity after the capacity of the voltage regulator module is configured
Setting ratio determines the reactive compensation module switching to the capacity of the reactive voltage adjusting means.
Specifically, the scope of above-mentioned setting ratio is [25%, 35%].In the actual disposition mistake of reactive voltage adjusting means
Cheng Zhong, the group forming criterion of capacitor can be to solve the problems, such as based on low-voltage circuit low voltage, solving the problems, such as three-phase imbalance
Two groups can be divided to for the capacitor of pair, therefore reactive compensation module, one group of realization compensates altogether, and another set realizes that a point benefit is mended
Repay, the ratio between both capacity could be arranged to 2:1.
In one embodiment, distribution network line end mesolow line where the reactive voltage adjusting means can be measured
The line voltage on road；
The phase voltage of low-voltage circuit is calculated according to the line voltage and phase voltage calculation formula；Wherein, the phase voltage meter
Calculating formula is：UIRepresent line voltage, UNRepresent phase voltage.
Usually, the phase voltage of above-mentioned low-voltage circuit can be 0.4kV (kilovolt).Above-mentioned reactive voltage adjusting means is applicable
In 0.4kV low pressure level, it can choose installation taiwan area in 0.4kV low pressure levels, it is determined that corresponding mount point, is configured
Adjusted with reactive voltage.
The line voltage that the present embodiment obtains according to measurement determines the phase voltage of low-voltage circuit, has identified phase voltage
Higher accuracy.
In one embodiment, the interval that above-mentioned rush increases coefficient can be [1.8,2.0]；Above-mentioned nargin coefficient takes
It is [1.3,1.5] to be worth section；
If the reactive voltage adjusting means is arranged in three-phase circuit, α can be arranged to 3；Can the idle electricity
Press adjusting means to be arranged in single-phase circuit, then α is arranged to 1.
In one embodiment, after the capacity of the voltage regulator module is configured, can also include：
N times sampling is carried out to the output signal of the reactive voltage adjusting means, obtains N number of sampling corresponding to output signal
Voltage；
The voltage wave of reactive voltage adjusting means installation taiwan area is calculated according to the sampled voltage and stability bandwidth calculation formula
Dynamic rate；Wherein, the stability bandwidth calculation formula is：
In formula, VB% is voltage fluctuation rate, ViFor the electricity of ith sample voltage, i.e. ith sample moment final mount point
Pressure, VNFor low-voltage circuit rated voltage, i is the integer more than or equal to 1 and less than or equal to N；
During gear regulation, the gear number and span of voltage regulator module are determined according to the voltage fluctuation rate.
Above-mentioned N can be determined according to the specific features of corresponding distribution network line end, for example be defined as 1000 equivalences.
It is above-mentioned that the gear number of voltage regulator module and the mistake of span are determined according to the voltage fluctuation rate as one embodiment
Journey can include：
Detect the installation taiwan area and whether there is distributed power source in the second setting time section；
If the installation taiwan area has distributed power source in the second setting time section, formula is adjusted according to the first gear
Determine the gear number and span during the regulation of voltage regulator module gear；
If distributed power source is not present in the installation taiwan area in the second setting time section, adjusted according to the second gear public
Formula determines the gear number and span during the regulation of voltage regulator module gear.
As one embodiment, above-mentioned first gear regulation formula includes：
VBDuring % ＞ 1, D=± 2m, J=2.5%；
0≤VBDuring %≤1, D=± m, J=5.0%；
The second gear regulation formula includes：
VBDuring % ＞ 1, D=-2m, J=2.5%；
0≤VBDuring %≤1, D=-m, J=5.0%；
In formula, D represents gear number, and m represents gear threshold value, and J represents span.
Above-mentioned second setting time section can be defined as a following longer period, such as this time of the five-year
Section.If it is described installation taiwan area distributed power source be present in the second setting time section, can by the gear of voltage regulator module to
Up-regulation (take+number) or to lowering (take-number).Under normal circumstances, if the output voltage of reactive voltage adjusting means is less than reference
Magnitude of voltage, then by the gear of voltage regulator module to downward, if the output voltage of reactive voltage adjusting means is more than reference voltage level,
Then the gear of voltage regulator module can be determined to up-regulation, above-mentioned reference voltage level according to the concrete model of voltage regulator module.If
Distributed power source is not present in the installation taiwan area in the second setting time section, then only need to be downward by the gear of voltage regulator module
Adjust, be effectively simplified the gear regulation process of voltage regulator module.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that come for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of collocation method of reactive voltage adjusting means, it is characterised in that comprise the following steps：
Maximum load current of the low-voltage circuit in the first setting time section where obtaining reactive voltage adjusting means mount point；
The phase voltage of installation taiwan area low-voltage circuit where obtaining the reactive voltage adjusting means；
The configuration that reactive voltage adjusting means is calculated according to the maximum load current, phase voltage and capacity configuration formula is held
Amount；Wherein, the capacity configuration formula is：S=α AQKUNILmax；In formula, α be installation taiwan area low-voltage circuit the number of phases, AQTo promote
Increase coefficient, K is nargin coefficient, UNFor phase voltage, ILmaxThe maximum load current of low-voltage circuit where mount point；
The capacity of voltage regulator module in the reactive voltage adjusting means is configured according to the configuration capacity.
2. the collocation method of reactive voltage adjusting means according to claim 1, it is characterised in that also include：
Determine reactive compensation module switching to the appearance of the reactive voltage adjusting means according to the setting ratio of the configuration capacity
Amount；Wherein, the reactive compensation module is connected in parallel on the output end of the voltage regulator module；The reactive compensation module includes multigroup
Capacitor.
3. the collocation method of reactive voltage adjusting means according to claim 2, it is characterised in that the setting ratio
Scope is [25%, 35%].
4. the collocation method of reactive voltage adjusting means according to claim 1, it is characterised in that also include：
N times sampling is carried out to the output signal of the reactive voltage adjusting means, obtains N number of sampling electricity corresponding to output signal
Pressure；
The voltage fluctuation rate of reactive voltage adjusting means installation taiwan area is calculated according to the sampled voltage and stability bandwidth calculation formula；
Wherein, the stability bandwidth calculation formula is：
<mrow>
<msub>
<mi>V</mi>
<mi>B</mi>
</msub>
<mi>%</mi>
<mo>=</mo>
<mfrac>
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<mfrac>
<mrow>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mn>2</mn>
</mrow>
<mi>N</mi>
</munderover>
<msup>
<mrow>
<mo>(</mo>
<msub>
<mi>V</mi>
<mi>i</mi>
</msub>
<mo>-</mo>
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<mi>V</mi>
<mrow>
<mi>i</mi>
<mo>-</mo>
<mn>1</mn>
</mrow>
</msub>
<mo>)</mo>
</mrow>
<mn>2</mn>
</msup>
</mrow>
<mrow>
<mi>N</mi>
<mo>-</mo>
<mn>1</mn>
</mrow>
</mfrac>
</msqrt>
<msub>
<mi>V</mi>
<mi>N</mi>
</msub>
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<mo>;</mo>
</mrow>
In formula, VB% is voltage fluctuation rate, ViFor ith sample voltage, VNFor low-voltage circuit rated voltage, i is more than or equal to 1
And the integer less than or equal to N；
During gear regulation, the gear number and span of voltage regulator module are determined according to the voltage fluctuation rate.
5. the collocation method of reactive voltage adjusting means according to claim 4, it is characterised in that described according to the electricity
Pressure stability bandwidth determines that the gear number of voltage regulator module and the process of span include：
Detect the installation taiwan area and whether there is distributed power source in the second setting time section；
If the installation taiwan area has distributed power source in the second setting time section, adjusting formula according to the first gear determines
Gear number and span during the regulation of voltage regulator module gear；
If distributed power source is not present in the installation taiwan area in the second setting time section, it is true to adjust formula according to the second gear
Determine the gear number and span during the regulation of voltage regulator module gear.
6. the collocation method of reactive voltage adjusting means according to claim 5, it is characterised in that first gear is adjusted
Section formula includes：
VBDuring % ＞ 1, D=± 2m, J=2.5%；
0≤VBDuring %≤1, D=± m, J=5.0%；
The second gear regulation formula includes：
VBDuring % ＞ 1, D=-2m, J=2.5%；
0≤VBDuring %≤1, D=-m, J=5.0%；
In formula, D represents gear number, and m represents gear threshold value, and J represents span.
7. the collocation method of the reactive voltage adjusting means according to any one of claim 1 to 6, it is characterised in that described
The interval for promoting to increase coefficient is [1.8,2.0]；The interval of the nargin coefficient is [1.3,1.5]；
It is described that reactive voltage adjusting means is calculated according to the maximum load current, phase voltage and default capacity configuration formula
Configuration capacity process before, in addition to：
If the reactive voltage adjusting means is arranged in three-phase circuit, α is arranged to 3；If the reactive voltage adjusting means
In single-phase circuit, then α is arranged to 1.
8. the collocation method of the reactive voltage adjusting means according to any one of claim 1 to 6, it is characterised in that described
The process of the phase voltage of installation taiwan area low-voltage circuit includes where obtaining the reactive voltage adjusting means：
The line voltage of installation taiwan area where measuring the reactive voltage adjusting means；
The phase voltage of low-voltage circuit is calculated according to the line voltage and phase voltage calculation formula；Wherein, the phase voltage calculation is public
Formula is：UIRepresent line voltage, UNRepresent phase voltage.
9. a kind of reactive voltage adjusting means, it is characterised in that including voltage regulator module and reactive compensation module；The pressure regulator
The secondary side of module includes bucking coil, and the reactive compensation module includes multiple unit capacitor；The voltage regulator module primary side
One end connection signal input part, voltage regulator module primary side the other end connection zero line side, the benefit of voltage regulator module secondary side
Repay the first end connection signal input part of coil, one end of the second end connection reactive compensation module of bucking coil, bucking coil
Three-terminal link reactive compensation module the other end, the reactive compensation module one end connection signal output part, the nothing
The other end connection zero line side of work(compensating module；
Before reactive voltage regulation, low-voltage circuit is in the first setting time section where obtaining reactive voltage adjusting means mount point
Interior maximum load current；
The phase voltage of installation taiwan area low-voltage circuit where obtaining the reactive voltage adjusting means；
The configuration that reactive voltage adjusting means is calculated according to the maximum load current, phase voltage and capacity configuration formula is held
Amount；Wherein, the capacity configuration formula is：S=α AQKUNILmax；In formula, α be installation taiwan area low-voltage circuit the number of phases, AQTo promote
Increase coefficient, K is nargin coefficient, UNFor phase voltage, ILmaxThe maximum load current of low-voltage circuit where device mount point；
The capacity of the voltage regulator module is configured according to the configuration capacity.
10. the collocation method of reactive voltage adjusting means according to claim 9, it is characterised in that configuring the tune
After the capacity of depressor module, determine the reactive compensation module switching to the nothing according to the setting ratio of the configuration capacity
The capacity of work(voltage regulating device.
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| CN108599105B (en) * | 2018-05-30 | 2020-03-20 | 南京南瑞继保电气有限公司 | Method for nonlinear capacity adjustment in longitudinal differential protection calculation of series transformer |
| KR102469129B1 (en) | 2018-05-30 | 2022-11-18 | 엔알 일렉트릭 컴퍼니 리미티드 | Longitudinal differential protection method for transformer |
| CN110429592B (en) * | 2019-08-06 | 2022-11-08 | 国网四川省电力公司电力科学研究院 | 10kV line voltage regulator installation position and capacity selection method |
| CN110620384B (en) * | 2019-10-22 | 2021-07-30 | 国网湖南省电力有限公司 | User low voltage management method based on plug-and-play mobile SVC |
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| CN103441510B (en) * | 2013-08-05 | 2016-01-20 | 南方电网科学研究院有限责任公司 | Regional power grid reactive power optimization method comprising flexible direct current transmission system |
| CN103490410B (en) * | 2013-08-30 | 2014-07-02 | 江苏省电力设计院 | Micro-grid planning and capacity allocation method based on multi-objective optimization |
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