CN104036074B - Low voltage discrimination method for distribution substation regions - Google Patents
Low voltage discrimination method for distribution substation regions Download PDFInfo
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- CN104036074B CN104036074B CN201410241912.8A CN201410241912A CN104036074B CN 104036074 B CN104036074 B CN 104036074B CN 201410241912 A CN201410241912 A CN 201410241912A CN 104036074 B CN104036074 B CN 104036074B
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The invention provides a low voltage discrimination method for distribution substation regions. The method can assist power grid operation administrative staff in planning transformation of the distribution substation regions and checking whether the design of a transformed project or a new project is reasonable. On the basis of a Simulink simulation platform of a Matlab, the method comprises the steps of automatically reading the information such as the types of main transformers, connection modes of a main line and branch lines, the types of wires, the lengths of the wires, the magnitudes of loads in the distribution substation regions through a program, or manually inputting the information, conducting analytical calculation on all the distribution substation regions under the same load condition, displaying the low voltage degrees, lowest terminal voltages and the range of the low voltages of the distribution substation regions, and automatically putting forward an optimal scheme for distribution substation region transformation on replacing wire paths of circuits and changing the wiring modes. Through the method, the defect that a model must be established when a single distribution substation region is analyzed accurately in the prior art is overcome, the disadvantage that comprehensive macroscopic evaluation can not be carried out on a large number of the distribution substation regions is avoided, and great convenience can be brought to judgment of whether the voltages of the distribution substation regions are too low and transformation design and new construction design of the distribution substation regions.
Description
Technical field
The present invention relates to power distribution station low voltage method of discrimination, belong to system for distribution network of power intelligent power field.
Background technology
Power distribution station is the direct network to customer power supply, and the quality of its quality of power supply directly affects the daily life of user
Produce and live.Due to being substantially increased of user power utilization amount, construction criteria has already fallen behind originally for many power distribution stations, a large amount of power distribution stations
Low phenomenon, the daily productive life of impact user in terminal voltage.
Electric power operation management department progressively carries out transformation and upgrade to the transformation in low-voltage platform area, due to transforming resource-constrained,
Can not disposably transform and finish, first have to fully understand the low voltage situation of power distribution station in administrative area, depending on serious conditions
Determine transformation order.Because power distribution station quantity is extremely many, the concrete condition in each area is different, and platform area is not in the same time
Power load is also being continually changing it is impossible to fully understand to power distribution network.At present whether low main of determining table area voltage
According to being that user complains to power supply department, related personnel goes field investigation to measure again, could this area of basic understanding feelings at that time
Condition.So waste time and energy, effect is also limited.
The present invention is on the basis of the simulink emulation platform of matlab, reads power distribution station by Automatic Program
The information such as main transformer model, the main line branch line mode of connection, wire type, conductor length, payload, or it is manually entered information, right
Each power distribution station is analyzed calculating under the conditions of same load, shows the degree of its low voltage, end minimum voltage, electricity
Press low scope, and just change circuit line footpath, change the optimal case that the mode of connection two aspect proposes the transformation of platform area automatically.
Content of the invention
It is an object of the present invention to provide a kind of method that low-voltage power distribution station area low voltage is quickly judged, can
Help the transformation of Regulation personnel planning power distribution station, check whether transformation or grassroot project design are reasonable.
For reaching this purpose, the present invention employs the following technical solutions.
A kind of method that low-voltage power distribution station area low voltage is quickly judged, including following main contents:
(1) set up the information bank of the power distribution station that need to analyze, these information are used for judging whether power distribution station voltage is low
With proposition Proposal for update.Information bank includes the electric parameter of equipment: the model capacity of the distribution transformer of power distribution station, leads for every section
The number of phases of line, model, length, the position of main loads, size etc..Also include related economic parameter: the price of equipment, design are built
Cause etc..
(2) phantom of power distribution station is set up based on the simulink emulation platform of matlab, phantom is by three-phase
The part such as 10kv alternating current power supply, Three-Phase Distribution Transformers (10kv/400v), three-phase conducting wire, three-phase load forms, and alternating current power supply is even
Connect the high-pressure side of described Three-Phase Distribution Transformers, the low-pressure end of Three-Phase Distribution Transformers connects three-phase load by three-phase conducting wire；
These models all can directly be taken in the powersystem component library of simulink.Due to simulink function itself, mould
Device in type can carry out assignment using matlab program to its parameter, and assignment method is to write m file, calls " set_
The capacity of param " function pair distribution transformer, the resistance value of wire, active reactive performance number of load etc. carry out assignment.
(3) editor matlab program the information bank of power distribution station is read automatically, can use " xlsread " order into
Style of writing part reads.And according to information, using as the method for assignment in (2), assignment is carried out to described phantom, including distribution transforming,
The electric parameter of wire, load etc..
(4) described phantom carries out assignment by information bank to described model, also can be through graphic user interface (gui window
Mouthful) show assigned parameter it is possible to according to practical situation, in gui window relevant position, neatly changing distribution transformer, lead
The parameter of line, load etc., helps technical staff that power distribution station is designed.
(5) simulation result of described phantom, be matlab simulink program according to circuit theory automatically to institute
Established model is emulated, and obtains the voltage x current value of each set point of model.If the simulation analysis that single power distribution station is carried out, can
Showing that simulation result is each point magnitude of voltage, distribution transforming outlet current value etc. by gui window, if there is low-voltage problem, calling m
Optimization program in file, is calculated and be shown optimal solution automatically；Understand to a large amount of platform areas are carried out with macroscopic view comprehensively, need
Continuously analyze multiple areas, then automatically generate file, use " xlswrite " to carry out result output, every according to simulation result record
The low voltage point in Ge Tai area, terminal voltage value, and mixed economy and technique effect propose optimum solution party to each area
Case.The computational methods of optimal solution, are by calling the optimization program in m file, change the parameter of device, make model from
Low cost changes to high cost model, and till making full court area voltage qualified, the Prototype devices parameter obtaining is exactly optimal solution.
The invention has the beneficial effects as follows, the present invention is using the power distribution station low-voltage emulation based on simulink in matlab
Method compensate for the deficiency in the past single area's Accurate Analysis must being respectively established, it is to avoid can not be to a large amount of allocated radios
Area carries out the weakness of comprehensive Macroscopic Evaluation, can transform and newly-built for the whether low judgement of power distribution station voltage, power distribution station
Design brings great convenience.
Brief description
Fig. 1 is the schematic flow sheet of low voltage method of discrimination in the specific embodiment of the invention.
Specific embodiment
Further illustrate technical scheme below in conjunction with the accompanying drawings and by specific embodiment.
Fig. 1 is the schematic flow sheet of low voltage method of discrimination in the specific embodiment of the invention.
As shown in figure 1, the present invention's comprises the following steps to power distribution station low-voltage decision method.
(1) select simulation model, including both of which: pattern 1 is single area to be analyzed emulate, and is mainly used in
The present situation of Xie Tedingtaiqu or analysis Proposal for update or assessment newly-built project；Pattern 2 is that multiple areas are carried out with macroscopic view understanding,
The effect of comparison different schemes, or analyze the platform area of the most serious that go wrong, it is the arrangement transformation plan of electrical network operation management department
Decision-making foundation is provided.
Phantom is born by three-phase 10kv alternating current power supply, Three-Phase Distribution Transformers (10kv/400v), three-phase conducting wire, three-phase
The part such as lotus forms, and these models all can directly be taken in the powersystem component library of simulink.Due to
Simulink function itself, the device in model can carry out assignment using matlab program to its parameter, and assignment method is to write m
File, calls the capacity of " set_param " function pair distribution transformer, the resistance value of wire, the active reactive performance number of load
Etc. carrying out assignment.
(2) if selecting single analysis, without data base's |input paramete, directly by the gui window input ginseng edited
Number, simulation result and optimal case suggestion directly display also by gui window, convenient, flexible.The simulation result that gui window shows
I.e. each point magnitude of voltage, distribution transforming outlet current value etc., if there is low-voltage problem, calling the optimization program in m file, optimizing journey
The cardinal principle of sequence is to change the parameter of device, so that model is changed to high cost model from low cost, until making full court area voltage
Till qualified, the Prototype devices parameter obtaining is exactly that optimal solution is calculated and be shown optimal solution automatically.
(3) if select batch quantity analysis pattern, emulate and carried out in automatic batch mode, result and optimal case suggestion
With document form output, the way of output is to use " xlswrite " function, records the electricity in each area according to simulation result for display
Press low point, terminal voltage value, and mixed economy and technique effect propose optimum solution to each area.
The phantom of the present invention can be according to needing to carry out the emulation under various situations:
(1) low voltage condition under different capacity factor；
(2) low voltage condition under different load access rate；
(3) low voltage condition under different load model etc..
The present invention can also easily expand its copying, such as introduces frequency analyses, three-phase imbalance analysis, idle benefit
Repay analysis etc..
Claims (5)
1. a kind of power distribution station low voltage method of discrimination is it is characterised in that methods described includes:
(1) set up the information bank of the power distribution station that need to analyze, these information are used for judging whether power distribution station voltage is low and carries
Go out Proposal for update；Described information storehouse includes the electric parameter of equipment: the model capacity of the distribution transformer of power distribution station, leads for every section
The number of phases of line, model, length, the position of main loads, size；Also include related economic parameter: the price of equipment, design-build
Cost；
(2) phantom of power distribution station is set up based on the simulink emulation platform of matlab, described phantom is by three-phase
10kv alternating current power supply, Three-Phase Distribution Transformers, three-phase conducting wire, three-phase load part composition, described alternating current power supply connects described three
The high-pressure side of phase distribution transformer, the low-pressure end of described Three-Phase Distribution Transformers connects three-phase load by three-phase conducting wire；Model
In devices use matlab program assignment is carried out to its parameter；Assignment method is to write m file, calls " set_param " letter
Several capacity to distribution transformer, the resistance value of wire, the active reactive performance number of load carry out assignment；
(3) editor's matlab program is read automatically to the information bank of power distribution station, uses " xlsread " order to carry out file
Read；And according to information, using the assignment method in (2), assignment is carried out to described phantom, including distribution transforming, wire, load
Electric parameter；
(4) described phantom carries out assignment by information bank to described model, shows institute through graphic user interface (gui window)
Assign parameter, and according to practical situation, in gui window relevant position, neatly change distribution transformer, wire, the parameter of load,
Help technical staff that power distribution station is designed；
(5) simulation result of described phantom, be matlab simulink program according to circuit theory automatically to being modeled
Type is emulated, and obtains the voltage x current value of each set point of model；If the simulation analysis that single power distribution station is carried out, pass through
Gui window display simulation result is each point magnitude of voltage, distribution transforming outlet current value；If there is low-voltage problem, call in m file
Optimization program, optimal solution is automatically calculated and be shown；Understand to a large amount of platform areas are carried out with macroscopic view comprehensively, need to continuously divide
Multiple areas of analysis, then automatically generate file, uses " xlswrite " to carry out result output, records each area according to simulation result
Low voltage point, terminal voltage value, and mixed economy and technique effect propose optimum solution to each area；Optimum
The computational methods of solution, are by calling the optimization program in m file, changing the parameter of device, make model from low cost
To the change of high cost model, till making full court area voltage qualified, the Prototype devices parameter obtaining is exactly optimal solution.
2. power distribution station according to claim 1 low voltage method of discrimination, is characterized in that, the present invention to power distribution station
Low-voltage decision method comprises the following steps:
(1) select simulation model, including both of which: pattern 1 is single area to be analyzed emulate, and is mainly used in understanding spy
The present situation in Ding Tai area or analysis Proposal for update or assessment newly-built project；Pattern 2 is that multiple areas are carried out with macroscopic view understanding, compares
The effect of different schemes, or analyze the platform area of the most serious that go wrong, the arrangement transformation plan for electrical network operation management department provides
Decision-making foundation；
(2) if selecting single analysis, without data base's |input paramete, directly by the gui window |input paramete edited, imitate
True result and optimal case suggestion directly display also by gui window, convenient, flexible；The simulation result that gui window shows is i.e. each
Point voltage value, distribution transforming outlet current value；If there is low-voltage problem, call the optimization program in m file, the modeler obtaining
Part parameter is exactly that optimal solution is calculated and be shown optimal solution automatically；
(3) if selecting batch quantity analysis pattern, emulating and being carried out in automatic batch mode, the display of result and optimal case suggestion
With document form output, the way of output is to use " xlswrite " function, and the voltage recording each area according to simulation result is inclined
Low spot, terminal voltage value, and mixed economy and technique effect propose optimum solution to each area.
3. power distribution station according to claim 1 low voltage method of discrimination, is characterized in that, described phantom can basis
Need carry out following state under emulation:
(1) low voltage condition under different capacity factor；
(2) low voltage condition under different load access rate；
(3) low voltage condition under different load model.
4. power distribution station according to claim 1 low voltage method of discrimination, is characterized in that, the function of methods described also may be used
Expanded, including introducing frequency analyses, three-phase imbalance analysis, reactive-load compensation analysis.
5. power distribution station according to claim 1 low voltage method of discrimination, is characterized in that, described phantom all exists
Directly take in the powersystem component library of simulink.
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| CN201410241912.8A CN104036074B (en) | 2014-06-04 | 2014-06-04 | Low voltage discrimination method for distribution substation regions |
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| CN201410241912.8A CN104036074B (en) | 2014-06-04 | 2014-06-04 | Low voltage discrimination method for distribution substation regions |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104880601B (en) * | 2014-11-28 | 2018-06-01 | 国家电网公司 | A kind of low-voltage customer low-voltage investigation method based on normal distribution statistical |
| CN106229978B (en) * | 2016-09-27 | 2017-09-01 | 国家电网公司 | The pre-judging method and system of platform area low-voltage problem |
| CN106786627A (en) * | 2016-12-23 | 2017-05-31 | 国网浙江奉化市供电公司 | A kind of transformer station's step voltage control method and system |
| CN106786646A (en) * | 2016-12-23 | 2017-05-31 | 国网浙江奉化市供电公司 | A kind of line level voltage control method and system |
| CN108334675B (en) * | 2018-01-18 | 2022-03-15 | 北京航空航天大学 | Artificial intelligence processing method and system for batch simulation of working condition set of digital aircraft |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102208807A (en) * | 2011-01-25 | 2011-10-05 | 中国电力科学研究院 | Medium and low voltage distribution network energy efficiency evaluation method based on accurate load measurement data |
| CN202276196U (en) * | 2011-10-31 | 2012-06-13 | 昌邑市供电公司 | Intelligent monitoring terminal device of intelligent switchhouse |
| CN103617357A (en) * | 2013-11-30 | 2014-03-05 | 国网河南省电力公司南阳供电公司 | Public transformer district low-voltage line loss analysis system and using method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102208807A (en) * | 2011-01-25 | 2011-10-05 | 中国电力科学研究院 | Medium and low voltage distribution network energy efficiency evaluation method based on accurate load measurement data |
| CN202276196U (en) * | 2011-10-31 | 2012-06-13 | 昌邑市供电公司 | Intelligent monitoring terminal device of intelligent switchhouse |
| CN103617357A (en) * | 2013-11-30 | 2014-03-05 | 国网河南省电力公司南阳供电公司 | Public transformer district low-voltage line loss analysis system and using method thereof |
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Effective date of registration: 20180724 Address after: 330096 No. 88, min Qiang Road, private science and Technology Park, Nanchang, Jiangxi Co-patentee after: State Grid Corporation of China Patentee after: Power Science Research Institute of Jiangxi Electric Power Co., Ltd. Address before: 100761 West Chang'an Avenue, Xicheng District, Xicheng District, Beijing Co-patentee before: State's net Jiangxi Province Electric power Science Academe Patentee before: State Grid Corporation of China |
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