CN105826940B - A kind of low-voltage network three-phase imbalance compensation independent positioning method - Google Patents
A kind of low-voltage network three-phase imbalance compensation independent positioning method Download PDFInfo
- Publication number
- CN105826940B CN105826940B CN201610382369.2A CN201610382369A CN105826940B CN 105826940 B CN105826940 B CN 105826940B CN 201610382369 A CN201610382369 A CN 201610382369A CN 105826940 B CN105826940 B CN 105826940B
- Authority
- CN
- China
- Prior art keywords
- phase
- electric pole
- load
- compensation
- branch line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Landscapes
- Supply And Distribution Of Alternating Current (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
Abstract
The invention discloses a kind of low-voltage network three-phase imbalances to compensate independent positioning method, and compensation device is simulated one by one from circuit latter end electric pole to the sequence of head end electric pole, determines the preliminary installation site of compensation device；Three-phase imbalance load is carried out to each electric pole on branch line to compensate, and calculates the every phase institute band number of users algebraical sum of each electric pole A phase, B phase, C phase circuit and three-phase imbalance Pressure drop factor variable quantity；The final installation site of spur compensation device is determined according to the size of three-phase imbalance Pressure drop factor variable quantity；It after each spur compensation location determination, while summing up in the point that head end electric pole, the distribution situation of uncompensated load after this section of branch line compensates is embodied using data of the conversion to first section electric pole, determines the power load distributing situation on main line；Main line power load distributing after calculating is regarded as a branch line power load distributing, main line is handled also with the processing method to branch line uncompensated load, it is final to determine that main line compensates position.
Description
Technical field
The present invention relates to a kind of low-voltage network three-phase imbalances to compensate independent positioning method.
Background technology
After most of countryside low-voltage electric distribution network is via 10KV/0.4KV transformer pressure-reducings, to low in the form of three-phase four-wire system
Press side customer power supply.And low-pressure side load is mainly by small part three-phase productive power load and with television set, refrigerator, all kinds of
High-power single-phase load composition based on electric cooking appliance etc..Under normal circumstances, in the single-phase user of attaching, power supply department should be by list
Phase load is balancedly tapped on A, B, C three-phase.But in real work and operation, the mark of circuit, the carelessness of staff
Along with the access of uncontrollable increase-volume, great power single phase load due to single-phase user and the asynchronism of single-phase load electricity consumption
Deng all causing the imbalance of threephase load.If low voltage electric network is run in the case that three-phase load unbalance degree is larger, it will give
Low voltage electric network causes following harmful effect with electrical equipment：
1. increasing the electric energy loss of circuit.
Out-of-balance current caused by power distribution network three-phase load unbalance causes each section of distribution line pressure drop not in the line
Together, to which grid side imbalance of three-phase voltage, high voltage offset will be caused, while neutral current is increased, is produced in phase line
Neutral conductor loss has been superimposed while raw loss to increase line loss.
2. increasing the electric energy loss of distribution transformer.
Distribution transformer is the power supply main equipment of low voltage electric network, will when it runs under threephase load imbalance operating mode
It can cause the increase of distribution loss.Because the power attenuation of distribution transforming is changed with the degree of unbalancedness of load.
It is reduced 3. distribution transforming is contributed.
Distribution transforming is run in threephase load imbalance, and the capacity of output is unable to reach rated value, spare capacity also phase
It should reduce, distribution transforming, which is contributed, to be reduced, and overload capacity reduces.If distribution transforming is run under overload conditions, i.e., easily cause distribution transforming fever,
Even distribution transforming scaling loss can be caused when serious.
4. distribution transforming generates zero-sequence current.
Distribution transforming is run under threephase load imbalance operating mode, will generate zero-sequence current, which will be with threephase load injustice
The degree of weighing apparatus and change, degree of unbalancedness is bigger, then zero-sequence current is also bigger.If there are zero-sequence currents for running distribution transforming, can make
The winding insulation of distribution transforming accelerates aging because of overheat, and equipment life is caused to reduce.Meanwhile depositing for zero-sequence current can also increase distribution transforming
Loss.
5. influencing the safe operation of electrical equipment.
Distribution transforming is run in threephase load imbalance, and three-phase output current is different, and the neutral conductor just has electric current and passes through.
So that the neutral conductor is generated impedance voltage drop causes each phase phase voltage to change so as to cause neutral point drifting.In voltage injustice
It powers under weighing apparatus situation, that is, the user power utilization equipment for be easy to causeing the high phase tape splicing of voltage is burnt out, and the phase tape splicing that voltage is low
User power utilization equipment then possibly can not use.So when threephase load off-center operation, it will seriously jeopardize the peace of electrical equipment
Row for the national games.
6. motor efficiency reduces.
Distribution transforming is run under threephase load imbalance operating mode, will cause output voltage three-phase imbalance.Due to uneven electricity
There is three positive sequence, negative phase-sequence, zero sequence component of voltage will cause motor output due to the braking action of negative sequence field for pressure
Power is reduced, and is reduced so as to cause motor efficiency.Meanwhile the Wen Sheng and reactive loss of motor, it also will be with three-phase voltage
Degree of unbalancedness and increase.
Therefore, just extremely important for the analysis of the compensation location method of low-voltage network three-phase imbalance.
Invention content
The present invention is to solve the above-mentioned problems, it is proposed that a kind of low-voltage network three-phase imbalance compensation independent positioning method,
This method only needs approximate to determine compensation location point and compensation effect by the user distribution in low voltage power distribution network.
To achieve the goals above, the present invention adopts the following technical scheme that：
A kind of low-voltage network three-phase imbalance compensation independent positioning method, includes the following steps：
(1) compensation device is simulated one by one from circuit latter end electric pole to the sequence of head end electric pole, determines compensation device
Preliminary installation site；
(2) it carries out three-phase imbalance load to each electric pole on branch line to compensate, calculates each electric pole A phase, B phase, C phase
Circuit institute's band number of users algebraical sum and three-phase imbalance Pressure drop factor variable quantity per phase；
(3) the final installation site of spur compensation device is determined according to the size of three-phase imbalance Pressure drop factor variable quantity；
(4) it by after each spur compensation location determination, while summing up in the point that head end electric pole, utilizes conversion to the number of first section electric pole
According to the distribution situation of uncompensated load after the compensation of this section of branch line is embodied, the power load distributing situation on main line is determined；
(5) the main line power load distributing after calculating is regarded as a branch line power load distributing, also with to branch line imbalance
The processing method of load handles main line, final to determine that main line compensates position.
In the step (1), simulation follows following principle：
(1) simulation is compensated in each electric pole, the total amount of user is carried out three phase averages to be born as the three-phase after compensation
Lotus carrys out the performance of grid side after analog compensation device compensating three-phase unbalance with this；
(2) since target is to calculate three-phase imbalance Pressure drop factor, therefore after being compensated at compensation position, relative to closing on bar
For, it is three-phase balancing load, and do not consider further that dynamic unbalance factor present in three-phase imbalance load.
In the step (2), when being compensated to carrying out three-phase imbalance load to N electric poles on branch line, each electric pole A
Phase, B phases, C phase lines institute's band number of users algebraical sum calculation formula per phase：
In formula:X is A phase, B phase, C phase, and l numbers for transformer outlet, and m is branch line number number, and n numbers for electric pole, N
For compensation electric pole number, then this electric pole institute band three-phase equilibrium amount be the every phase of A phase, B phase, C phase circuit band number of users algebraically
And minimum value, institute band a three-phase imbalance amount be A phase, B phase, C phase circuit per phase institute band number of users algebraical sum maximum value and minimum
The difference of value.
In the step (2), uneven Pressure drop factor Δ ULComputational methods are：
Wherein, KαFor the dynamic unbalance factor in balanced load；KβFor the dynamic unbalance factor, K in uncompensated loadRFor
The line impedance factor is with indicating, value is related with line length, material, cross-sectional area, KISingle user's electric current is flowed through for circuit
The factor.
In the step (3), uneven Pressure drop factor algebraical sum calculation formula：
Three-phase imbalance Pressure drop factor variable quantity calculation formula：
In formula,The sum of each section of Pressure drop factor of branch line three-phase imbalance when not compensate,
The sum of each section of Pressure drop factor of branch line three-phase imbalance respectively after bar 1, bar 2, bar n compensation.
In the step (3), by analyzing δUWithSize, reasonably select the installation position of compensation device
It sets, chooses compensation position herein according to as follows：
(1) to spur compensation location determination foundation：δU≥50；
(2) location determination foundation is compensated to main line：δU≥30。
In the step (4), the volume mounting means of compensation device includes indoor and outdoor peace in countryside low-voltage electric distribution network
Dress, the requirement according to the compensation principle of compensation device and to compensation device installation site, the compensation that compensation device is played are made
With ranging between compensation bar and adjacent upper level bar.
In the step (4), after branch line compensates location determination, while head end electric pole is summed up in the point that, first section is arrived using conversion
The data of electric pole embody the distribution situation of uncompensated load after the compensation of this section of branch line.
In the step (5), unified end and outgoing line side i.e. main line side after merging abbreviation obtain negative on main line
Main line power load distributing after reduction is regarded as a branch line power load distributing by lotus distribution map according to load chart, also with
The processing method of branch line uncompensated load handles main line, it is final to determine that main line compensates position.
Beneficial effects of the present invention are：
(1) the method for the present invention is simple and convenient, does not need complicated calculations and programming, compensation can be completed by excel tools
The approximation of position determines；
(2) since low voltage power distribution network wiring is lengthy and jumbled, it is difficult to analyze non-equilibrium site compensation point, the side of the present invention is utilized
Method, it is only necessary to which compensation location point and compensation effect approximate can be determined by the user distribution in low voltage power distribution network；
(3) in analysis, dynamic unbalance factor K in balanced loadα, dynamic unbalance factor K in uncompensated loadβMake
To influence two factors of uneven Pressure drop factor, by being found after changing its value, compensation position does not change, and demonstrates
The validity of imbalance compensation location determining method.
Description of the drawings
Fig. 1 is compensation position and the compensation range schematic diagram of the present invention；
Fig. 2 is the villages Chen Jia I No. 1 branch line user profile of outlet of the present invention；
Fig. 3 is that the sunshine Juxian County Chengyang Chen Jiatun #1 of the present invention become electric pole distribution map；
Fig. 4 is that the sunshine Juxian County Chengyang Chen Jiatun #1 of the present invention become each phase amount distribution map；
Fig. 5 is branch line I-1 user profiles when the present invention does not compensate；
User distribution schematic diagram after Fig. 6 is the compensation positions electric pole I-1.1 of the present invention and compensates；
Fig. 7 is that the sunshine Chengyang Chen Jiatun #1 of the present invention become each phase amount distribution map after bar I-1.1 compensation；
Fig. 8 is each phase user profile after each branch line of the present invention compensates；
Fig. 9 is each phase user distribution schematic diagram after each branch line of the present invention compensates.
Specific implementation mode：
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1, in countryside low-voltage electric distribution network the volume mounting means of compensation device generally have it is indoor and two kinds outdoor
Mounting means, it is indoor that generally compensation device is mounted in low-voltage distribution room；Compensation device is generally fixed on electricity by open air nearby
On bar.In general, the compensating action effective range that compensation device is played be generally compensate bar and adjacent upper level bar it
Between, in Fig. 1, compensation point is located at 1, and compensation effective range is circuit between 1 to 2, i.e., toward in terms of branch line end from electric pole 2, performance
For three-phase equilibrium, and compensated distance position is remoter, and compensating action is weaker.
By user profile carry out layout of roads, define transformer go out wire size, branch wire size and by each electric pole on branch line by
The sequence of tail end to first section is numbered, and in Fig. 2, I-1.1 represents first, the branch line bar of I outlets 1, I.1 represents I outlets
No. 1 bar i.e. on main line.
For ease of analyzing and describing, it is defined as follows several variables
(1) per phase, institute's band number of users is denoted as each electric pole A phase, B phase, C phase circuit：Al-m.n,Bl-m.n,Cl-m.n,
Wherein, l numbers for transformer outlet；M numbers for branch line；N numbers for electric pole；
(2) per phase, institute's band number of users algebraical sum is denoted as each electric pole A phase, B phase, C phase circuit：Wherein X=A, B, C；
(3) certain electric pole institute band three-phase equilibrium amount：SPH；
(4) certain electric pole institute band three-phase imbalance amount:SSH；
(5) due to the asynchronism factor there are electricity consumption in balanced load, thus define in balanced load dynamic unbalance because
Son:Kα；
(6) due to the asynchronism factor there are electricity consumption in uncompensated load, therefore it is uneven to define dynamic in uncompensated load
Weigh factor Kβ；
(7) line impedance factor K is definedRIt indicates, value is related with line length, material, cross-sectional area；
--- pair cross-section product is 70mm2, length is the common aluminum stranded conductor K of 50mRTake 0.5；
--- pair cross-section product is 35mm2, length is the common aluminum stranded conductor K of 50mRTake 1；
(8) it defines circuit and flows through single user's current factor KI；
(9) the uneven Pressure drop factor Δ U of each section of circuit is definedl-m.n, indicate the imbalance of section between n bars and n+1 bars
Pressure drop factor；
(10) uneven Pressure drop factor algebraical sum is usedIt indicates；
(11) three-phase imbalance Pressure drop factor variable quantity δU；
After defining each variable, the installation site of compensation device is determined followed by simple computation.By compensation device
Simulated experiment is carried out one by one from circuit latter end electric pole to the sequence of head end electric pole.Simulated experiment should follow following rule：
(1) it is that the total amount of user is carried out three phase averages to bear as the three-phase after compensation to compensate simulation in certain electric pole
Lotus carrys out the performance of grid side after analog compensation device compensating three-phase unbalance with this；
(2) since target is to calculate three-phase imbalance Pressure drop factor, therefore after being compensated at compensation position, relative to closing on bar
For, it is three-phase balancing load, and do not consider further that dynamic unbalance factor present in three-phase imbalance load.
When being compensated to carrying out three-phase imbalance load to N electric poles on branch line, formula is as follows：
Each electric pole A phase, B phase, C phase circuit institute's band number of users algebraical sum calculation formula per phase：
In formula:X is A phases, B phases, C phases；
L numbers for transformer outlet；
M numbers for branch line；
N numbers for electric pole；
N is compensation electric pole number；
Certain electric pole institute band three-phase equilibrium amount calculation formula：
Certain electric pole institute band three-phase imbalance amount calculation formula：
Uneven Pressure drop factor Δ ULCalculation formula：
In formula,
Uneven Pressure drop factor algebraical sum calculation formula：
Three-phase imbalance Pressure drop factor variable quantity calculation formula：
In formula,The sum of each section of Pressure drop factor of branch line three-phase imbalance when not compensate； The sum of each section of Pressure drop factor of branch line three-phase imbalance respectively after bar 1, bar 2, bar n compensation.
By analyzing δUWithSize, reasonably select the installation site of compensation device, herein choose compensation
Position is according to as follows：
(1) to spur compensation location determination foundation：δU≥50；
(2) location determination foundation is compensated to main line：δU≥30。
For ease of analyzing and describing, hereafter by taking the Juxian County villages Chen Jiatun power load distributing as an example, each phase single-phase load is distributed close
Like equivalent with each mutually single-phase number of users, the compensation location determining method proposed is described in detail.
Branch line user distribution given in Fig. 5, substitutes into above-mentioned formula (2-1)-(2-6), and analysis Chen Jia collects I-1.n
Branch.
When 1, not compensating：
(1) each electric pole A phase, B phase, C phase circuit per phase the calculating with number of users algebraical sum it is as follows：
Similarly,
(2) each section of balance, the calculating of uneven Pressure drop factor are as follows：
Therefore Δ UI-1.1=(SPH*Kα+SSH*Kβ)*KI*KR=(0 × 0.3+31 × 0.5) × 1 × 1=15.5
In formula, dynamic unbalance factor K in balanced loadαTake 0.3；
Dynamic unbalance factor K in uncompensated loadβTake 0.5；
Similarly,
ΔUI-1.2=19.5, Δ UI-1.3=19.5, Δ UI-1.4=24.3, Δ UI-1.5=22.7
(3) uneven Pressure drop factor algebraical sum calculates as follows：
It is as shown in table 1 that table is drawn by data analysis above：
2, when separate compensation electric pole I-1.1,
(1) each electric pole A phase, B phase, C phase circuit per phase the calculating with number of users algebraical sum it is as follows：
It can similarly obtain,
(2) calculating of each section of uneven Pressure drop factor is as follows：
ΔU'I-1.1=0
For remaining each section of computational methods with when not compensating, result of calculation is as follows：
ΔU'I-1.2=4, Δ U'I-1.3=12, Δ U'I-1.4=8.8, Δ U'I-1.5=11.2
(3) uneven Pressure drop factor algebraical sum calculates as follows：
(4) three-phase imbalance Pressure drop factor variable quantity calculates as follows：
According to above-mentioned result of calculation, each Parameters variation table of the branch line after electric pole I-1.1 compensation is drawn, is shown in Table 2：
Obviously, 101.5 when uneven Pressure drop factor is not by compensating are reduced to 36, and compensation effect is obvious.
Individually I-1.2, I-1.3, I-1.4, I-1.5 are compensated according to the compensation method to I-1.1, draw electricity
Each Parameters variation table of the branch line after bar I-1.2, I-1.3, I-1.4, I-1.5 compensation, is shown in Table 3 respectively, table 4, table 5, table 6.
Table 3
Table 4
Table 5
Table 6
In summary result of calculation calculates three-phase imbalance Pressure drop factor variable quantity, as follows：
Obviously, analyzing compensation position using the above method can show that I-1 branch lines compensation compensation position is located at I-1.1；
After the compensation position selection I-1.1 position compensations of branch line I-1 branch lines, the data conversion after I-1.1 is compensated
To head end electric pole, three-phase imbalance load distribution such as Fig. 7.
Similarly, the compensation position of two other branch line I-2, I-3 are determined with same method, compensation situation is such as
Under：
(1) branch line I-2 is needed not compensate for；
(2) branch line I-3 is compensated, and compensation position is located at I-3.3；
(2) to the processing of main line
The volume mounting means of compensation device generally has indoor and outdoor installation, indoor general peace in countryside low-voltage electric distribution network
In low-voltage distribution room；Compensation device is generally fixed on electric pole by open air nearby.According to the compensation principle of compensation device with
And the requirement to compensation device installation site, the compensating action range that compensation device is played be generally compensate bar with it is adjacent upper
Between level-one bar in Fig. 6, compensation point is located at I-1.1, and compensation range is I-1.1 to I-1.2, and compensated distance position is remoter, mends
The effect of repaying is weaker.
After compensating location determination to branch line I-1, I-2, the compensation position of I-3 are determined after the same method.
It after three branch line compensation location determinations, while summing up in the point that head end electric pole, embodies this using data of the conversion to first section electric pole
The distribution situation of uncompensated load after section branch line compensation.After handling branch line, relative complex low-voltage distribution
Net becomes relatively easy.Three-phase imbalance load distribution map is shown in Fig. 8 after compensation.
Unified end and outgoing line side i.e. main line side, obtain the load chart on main line, such as Fig. 9 after merging abbreviation
As it can be seen that the main line power load distributing after reduction is considered as into a branch line power load distributing, also with to branch line uncompensated load
Processing method main line is handled, it is final to determine that main line compensates position.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (6)
1. a kind of low-voltage network three-phase imbalance compensates independent positioning method, it is characterized in that：Include the following steps：
(1) compensation device is simulated one by one from line end electric pole to the sequence of head end electric pole, determines the first of compensation device
Walk installation site；
(2) it carries out three-phase imbalance load to each electric pole on branch line to compensate, calculates each electric pole A phase, B phase, C phase circuit
Institute's band number of users algebraical sum and three-phase imbalance Pressure drop factor variable quantity per phase；
(3) the final installation site of spur compensation device is determined according to the size of three-phase imbalance Pressure drop factor variable quantity；
(4) by after each spur compensation location determination, while summing up in the point that head end electric pole, using the data of conversion to head end electric pole come
The distribution situation for embodying uncompensated load after this section of branch line compensates, determines the power load distributing situation on main line；
(5) the main line power load distributing after calculating is regarded as a branch line power load distributing, also with to branch line uncompensated load
Processing method main line is handled, it is final to determine that main line compensates position；
In the step (2), when being compensated to carrying out three-phase imbalance load to N electric poles on branch line, each electric pole A phases, B
Phase, C phase lines institute's band number of users algebraical sum calculation formula per phase：
In formula:X is A phase, B phase, C phase, and l numbers for transformer outlet, and m numbers for branch line, and n numbers for electric pole, and N is compensation
Electric pole is numbered, then electric pole institute band three-phase equilibrium amount be A phases, B phases or C phase lines per phase band number of users algebraical sum minimum
Value, institute with three-phase imbalance amount is A phases, B phases or C phase lines often phase the difference with number of users algebraical sum maxima and minima
Value；
In the step (2), uneven Pressure drop factor Δ Ul-m.nComputational methods are：
Wherein, KαFor the dynamic unbalance factor in balanced load；KβFor the dynamic unbalance factor, K in uncompensated loadRFor circuit
The impedance factor, value is related with line length, material, cross-sectional area, KISingle user's current factor, S are flowed through for circuitPHFor electricity
Line bar institute band three-phase equilibrium amount, SSHBy electric pole band three-phase imbalance amount:；
Uneven Pressure drop factor algebraical sum calculation formula：
Three-phase imbalance Pressure drop factor variable quantity calculation formula：
In formula,The sum of each section of Pressure drop factor of branch line three-phase imbalance when not compensate, The sum of each section of Pressure drop factor of branch line three-phase imbalance respectively after bar 1, bar 2, bar n compensation.
2. a kind of low-voltage network three-phase imbalance as described in claim 1 compensates independent positioning method, it is characterized in that：The step
Suddenly in (1), simulation follows following principle：
(1) simulation is compensated in each electric pole, the total amount of user is subjected to three phase averages as the three-phase load after compensating, with
This carrys out the performance of grid side after analog compensation device compensating three-phase unbalance；
(2) since target is to calculate three-phase imbalance Pressure drop factor, therefore compensating at position after compensation, relative to adjacent upper one
It is three-phase balancing load, and do not consider further that dynamic unbalance factor present in three-phase imbalance load for grade bar.
3. a kind of low-voltage network three-phase imbalance as described in claim 1 compensates independent positioning method, it is characterized in that：The step
Suddenly in (3), by analyzing three-phase imbalance Pressure drop factor variable quantity δUWith uneven Pressure drop factor algebraical sumIt is big
It is small, the installation site of compensation device is reasonably selected, chooses compensation position according to as follows：
(1) to spur compensation location determination foundation：δU≥50；
(2) location determination foundation is compensated to main line：δU≥30。
4. a kind of low-voltage network three-phase imbalance as claimed in claim 3 compensates independent positioning method, it is characterized in that：The step
Suddenly in (4), the mounting means of compensation device includes indoor and outdoor installation in countryside low-voltage electric distribution network, according to compensation device
Compensation principle and requirement to compensation device installation site, the compensating action that compensation device is played ranging from compensate bar and phase
Between adjacent upper level bar.
5. a kind of low-voltage network three-phase imbalance as claimed in claim 4 compensates independent positioning method, it is characterized in that：The step
Suddenly in (4), after branch line compensates location determination, while head end electric pole is summed up in the point that, using the data of conversion to head end electric pole come body
The distribution situation of uncompensated load after now this section of branch line compensates.
6. a kind of low-voltage network three-phase imbalance as claimed in claim 5 compensates independent positioning method, it is characterized in that：The step
Suddenly in (5), it is uniformly attributed to outgoing line side i.e. main line side after merging abbreviation, obtains the load chart on main line, according to
Main line power load distributing after reduction is regarded as a branch line power load distributing by load chart, also with to branch line imbalance
The processing method of load handles main line, final to determine that main line compensates position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610382369.2A CN105826940B (en) | 2016-06-01 | 2016-06-01 | A kind of low-voltage network three-phase imbalance compensation independent positioning method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610382369.2A CN105826940B (en) | 2016-06-01 | 2016-06-01 | A kind of low-voltage network three-phase imbalance compensation independent positioning method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105826940A CN105826940A (en) | 2016-08-03 |
| CN105826940B true CN105826940B (en) | 2018-08-21 |
Family
ID=56531625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610382369.2A Expired - Fee Related CN105826940B (en) | 2016-06-01 | 2016-06-01 | A kind of low-voltage network three-phase imbalance compensation independent positioning method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105826940B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107896003A (en) * | 2017-11-23 | 2018-04-10 | 成都汉度科技有限公司 | One kind is based on 4G communication mode low-voltage equipment on-line monitoring methods |
| CN111244977B (en) * | 2020-01-19 | 2021-04-23 | 国网冀北电力有限公司电力科学研究院 | Three-phase unbalanced load grading iteration adjustment method based on low-voltage distribution network |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102904270A (en) * | 2012-11-05 | 2013-01-30 | 镇江长河电力技术有限公司 | Three-phase current unbalance adjusting system for power distribution network |
| WO2013013656A2 (en) * | 2011-07-22 | 2013-01-31 | ct.e Controltechnology Engineering GmbH | Method for adaptively controlling the supply voltage in local distribution systems |
| WO2014063666A2 (en) * | 2012-10-25 | 2014-05-01 | Ege, Spol. S R.O. | Method of controlling an apparatus compensating ground fault currents for compensating for fault currents in an n-phase distribution system |
| CN104333019A (en) * | 2014-11-27 | 2015-02-04 | 宁波华浙电力技术有限公司 | Voltage optimizing point sorting method for 10KV overhead line reactive compensation device |
-
2016
- 2016-06-01 CN CN201610382369.2A patent/CN105826940B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013013656A2 (en) * | 2011-07-22 | 2013-01-31 | ct.e Controltechnology Engineering GmbH | Method for adaptively controlling the supply voltage in local distribution systems |
| WO2014063666A2 (en) * | 2012-10-25 | 2014-05-01 | Ege, Spol. S R.O. | Method of controlling an apparatus compensating ground fault currents for compensating for fault currents in an n-phase distribution system |
| CN102904270A (en) * | 2012-11-05 | 2013-01-30 | 镇江长河电力技术有限公司 | Three-phase current unbalance adjusting system for power distribution network |
| CN104333019A (en) * | 2014-11-27 | 2015-02-04 | 宁波华浙电力技术有限公司 | Voltage optimizing point sorting method for 10KV overhead line reactive compensation device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105826940A (en) | 2016-08-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Emanuel | Apparent power definitions for three-phase systems | |
| CN105117560B (en) | A kind of medium-voltage distribution circuit theoretical line loss caluclation method | |
| CN103151795B (en) | Scattered-type wind power plant reactive power optimization control method capable of reducing fan losses and system | |
| CN110460072A (en) | Consider the real-time Management strategy of low-voltage platform area three-phase imbalance problem of phase index | |
| KR100872725B1 (en) | Electric supply loss mountaintop method of electric supply channel | |
| CN105826940B (en) | A kind of low-voltage network three-phase imbalance compensation independent positioning method | |
| CN109510197A (en) | The line loss calculation method of platform area power distribution network | |
| CN106451487A (en) | 220kV urban power grid reactive power compensation method | |
| CN105006820B (en) | Quantitative analysis method for influence of electric energy quality on comprehensive energy consumption of power transmission line | |
| CN108493965A (en) | Distribution transformer three-phase imbalance Automatic adjustment method | |
| Das | Arc flash hazard calculations in LV & MV DC systems-part i-short-circuit calculations | |
| CN111740427B (en) | Reactive compensation configuration method and system for offshore wind farm access system | |
| Naumov et al. | Additional electric loss in rural distribution networks 0.38 kV | |
| CN105139145A (en) | Medium-voltage distribution line theory line loss analysis system | |
| CN106981880B (en) | Quantitative calculation method for unbalanced responsibility at public coupling point in power distribution system | |
| CN108548954A (en) | A kind of equipment of the situation of monitoring AC electrical device | |
| CN104410071A (en) | 35KV high voltage distribution network loop-closing and loop-opening current estimation method | |
| Yang et al. | Research on influence of three-phase current unbalance on transformer losses and the top-oil temperature | |
| Hu et al. | Low voltage distribution network line loss calculation based on the theory of three-phase unbalanced load | |
| Kepka | Load modelling for power system analysis | |
| CN105207249A (en) | Wind power plant constant power factor control system and control method thereof | |
| CN109842110B (en) | Low-voltage analysis algorithm for power distribution terminal of low-voltage transformer area | |
| Naumov et al. | About Electric Energy Additional Losses Reduction at the Phase Currents Unbalancing in the 0.38 kV Operating Networks | |
| CN105095657B (en) | A kind of power grid load flow calculation method for considering cross-linked polyethylene insulated cable thermal characteristics | |
| CN104376209A (en) | Theoretical line loss computation method for high-voltage transmission long line provided with shunt reactors |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180821 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |