CN104036074A - Low voltage discrimination method for distribution substation regions - Google Patents
Low voltage discrimination method for distribution substation regions Download PDFInfo
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- CN104036074A CN104036074A CN201410241912.8A CN201410241912A CN104036074A CN 104036074 A CN104036074 A CN 104036074A CN 201410241912 A CN201410241912 A CN 201410241912A CN 104036074 A CN104036074 A CN 104036074A
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- 238000000034 method Methods 0.000 claims abstract description 27
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- 238000004364 calculation method Methods 0.000 claims abstract description 4
- 238000004458 analytical method Methods 0.000 claims description 13
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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
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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 user's daily productive life.Due to the significantly rising of user power utilization amount, many power distribution stations originally construction criteria fall behind, and phenomenon on the low side appears in a large amount of power distribution stations terminal voltage, affects user's daily productive life.
Electric power operation management department progressively carries out transformation and upgrade to the transformation in low-voltage platform district, due to transformation resource-constrained, can not disposable transformation complete, first will fully understand the low voltage situation of power distribution station administrative area in, determines and transforms order depending on serious situation.Because power distribution station quantity is extremely many, the concrete condition in each district is different, and platform district, cannot fully understand power distribution network also in continuous variation in power load in the same time not.Determine that at present platform district's voltage Main Basis whether on the low side is that user complains to power supply department, related personnel goes field investigation to measure again, could basic understanding Gai Tai district situation at that time.Waste time and energy like this, effect is also limited.
The present invention is on the basis of the Simulink of Matlab emulation platform, automatically read the information such as the main transformer model, the main line branch line mode of connection, wire type, conductor length, payload of power distribution station by program, or manual input message, each power distribution station is carried out under same load condition to analytical calculation, show degree, the end minimum voltage of its low voltage, the scope of low voltage, and just change circuit wire diameter, change the mode of connection two aspects and automatically propose the optimal case of platform district transformation.
Summary of the invention
The object of the invention is, provide a kind of low-voltage distribution platform district low voltage is carried out to the method for judgement fast, can help the transformation of Regulation personnel planning power distribution station, check whether transformation or new project design be reasonable.
For reaching this object, the present invention by the following technical solutions.
Low-voltage distribution platform district low voltage is carried out to a method for judgement fast, comprises following main contents:
(1) set up the information bank that needs the power distribution station of analyzing, these information are used for judging that whether power distribution station voltage is on the low side and propose transformation suggestion.Information bank comprises the electric parameter of equipment: the model capacity of the substation transformer of power distribution station, the number of phases of every section lead, model, length, position, the size etc. of main load.Also comprise related economic parameter: price, the design-build cost etc. of equipment.
(2) the Simulink emulation platform based on Matlab is set up the realistic model of power distribution station, realistic model is made up of parts such as three-phase 10kV AC power, Three-Phase Distribution Transformers (10kV/400V), three-phase conducting wire, three-phase loads, AC power connects the high-pressure side of described Three-Phase Distribution Transformers, and 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 of Simulink component library.Due to the function of Simulink own, device in model can utilize Matlab program to carry out assignment to its parameter, assignment method is to write m file, calls the capacity of " set_param " function to substation transformer, resistance value, the meritorious reactive power value of load etc. of wire carries out assignment.
(3) editor Matlab program reads automatically to the information bank of power distribution station, can use " xlsread " order to carry out file and read.And according to information, utilize as the method for assignment in (2), described realistic model is carried out to assignment, comprise the electric parameter of distribution transforming, wire, load etc.
(4) described realistic model carries out assignment by information bank to described model, also can show the parameter of composing through graphic user interface (GUI window), and can be according to actual conditions, in GUI window relevant position, change neatly the parameter of substation transformer, wire, load etc., help technician to design power distribution station.
(5) simulation result of described realistic model, is that the Simulink program of Matlab is carried out emulation to institute's established model automatically according to circuit theory, obtains the electric current and voltage value of the each set point of model.If the simulation analysis that single power distribution station is carried out, can show that simulation result be each point magnitude of voltage, distribution transforming outlet current value etc. by GUI window, if there is low-voltage problem, call the optimizer in m file, automatically calculate and show optimal solution; If carry out macroscopic view comprehensively to a large amount of platforms district understands, need to analyze continuously multiple districts, automatic spanned file, use " xlswrite " to carry out result output, record low voltage point, the terminal voltage value in each district according to simulation result, and mixed economy and technique effect, to each district, optimum solution is proposed.The computing method of optimal solution, are by calling the optimizer in m file, change the parameter of device, and model is changed to the high model of cost from cost is low, until make full court district voltage qualified, the model device parameters obtaining is exactly optimum solution.
The invention has the beneficial effects as follows, the present invention adopts the power distribution station low-voltage emulation mode based on Simulink in Matlab to make up the deficiency that in the past must set up respectively model to single district's Accurate Analysis, avoid carrying out a large amount of power distribution stations the weakness of comprehensive Macroscopic Evaluation, can be the judgement whether on the low side of power distribution station voltage, power distribution station transformation and newly-built design and bring great convenience.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of low voltage method of discrimination in the specific embodiment of the invention.
Embodiment
Further illustrate technical scheme of the present invention below in conjunction with accompanying drawing and by 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, of the present invention power distribution station low-voltage decision method is comprised the following steps.
(1) select simulation model, comprise two kinds of patterns: pattern 1 is that single district analyzed to emulation, be mainly used in understanding the present situation in certain station district or analyze transformation suggestion or assessment newly-built project; Pattern 2 is multiple districts to be carried out to macroscopic view understand, the relatively effect of different schemes, or analyze the most serious Tai of problem district, for the arrangement transformation plan of electrical network operation management department provides decision-making foundation.
Realistic model is made up of parts such as three-phase 10kV AC power, Three-Phase Distribution Transformers (10kV/400V), three-phase conducting wire, three-phase loads, and these models all can directly be taken in the Powersystem of Simulink component library.Due to the function of Simulink own, device in model can utilize Matlab program to carry out assignment to its parameter, assignment method is to write m file, calls the capacity of " set_param " function to substation transformer, resistance value, the meritorious reactive power value of load etc. of wire carries out assignment.
(2), if select single analysis, without database input parameter, directly by edited GUI window input parameter, simulation result and optimal case suggestion also directly show by GUI window, convenient, flexible.The simulation result that GUI window shows is each point magnitude of voltage, distribution transforming outlet current value etc., if there is low-voltage problem, call the optimizer in m file, the cardinal principle of optimizer is, change the parameter of device, model is changed to the high model of cost from cost is low, until make full court district voltage qualified, the model device parameters obtaining is exactly that optimum solution is automatically calculated and shows optimal solution.
(3) if select batch quantity analysis pattern, emulation is carried out in automatic batch mode, the demonstration of result and optimal case suggestion is exported with document form, the way of output is to use " xlswrite " function, record low voltage point, the terminal voltage value in each district according to simulation result, and mixed economy and technique effect, to each district, optimum solution is proposed.
Realistic model of the present invention can be according to the emulation that need to carry out 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 expand its copying easily, as introduced frequency analysis, three-phase imbalance analysis, reactive-load compensation analysis etc.
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Claims (5)
1. a power distribution station low voltage method of discrimination, is characterized in that, described method comprises:
(1) set up the information bank that needs the power distribution station of analyzing, these information are used for judging that whether power distribution station voltage is on the low side and propose transformation suggestion; Described information bank comprises the electric parameter of equipment: the model capacity of the substation transformer of power distribution station, the number of phases of every section lead, model, length, position, the size of main load; Also comprise related economic parameter: the price of equipment, design-build cost;
(2) the Simulink emulation platform based on Matlab is set up the realistic model of power distribution station, described realistic model is made up of three-phase 10kV AC power, Three-Phase Distribution Transformers (10kV/400V), three-phase conducting wire, three-phase load part, described AC power connects the high-pressure side of described Three-Phase Distribution Transformers, and the low pressure end of described Three-Phase Distribution Transformers connects three-phase load by three-phase conducting wire; Device in model can utilize Matlab program to carry out assignment to its parameter; Assignment method is to write m file, calls the capacity of " set_param " function to substation transformer, the resistance value of wire, the meritorious reactive power value of load and carries out assignment;
(3) editor Matlab program reads automatically to the information bank of power distribution station, uses " xlsread " order to carry out file and reads; And according to information, utilize as the assignment method in (2), described realistic model is carried out to assignment, comprise the electric parameter of distribution transforming, wire, load;
(4) described realistic model carries out assignment by information bank to described model, show through graphic user interface (GUI window) parameter of composing, and can be according to actual conditions, in GUI window relevant position, change neatly the parameter of substation transformer, wire, load, help technician to design power distribution station;
(5) simulation result of described realistic model, is that the Simulink program of Matlab is carried out emulation to institute's established model automatically according to circuit theory, obtains the electric current and voltage value of the each set point of model; If the simulation analysis that single power distribution station is carried out, can show that simulation result is each point magnitude of voltage, distribution transforming outlet current value by GUI window; If there is low-voltage problem, call the optimizer in m file, automatically calculate and show optimal solution; If carry out macroscopic view comprehensively to a large amount of platforms district understands, need to analyze continuously multiple districts, automatic spanned file, use " xlswrite " to carry out result output, record low voltage point, the terminal voltage value in each district according to simulation result, and mixed economy and technique effect, to each district, optimum solution is proposed; The computing method of optimal solution, are by calling the optimizer in m file, change the parameter of device, and model is changed to the high model of cost from cost is low, until make full court district voltage qualified, the model device parameters obtaining is exactly optimum solution.
2. power distribution station according to claim 1 low voltage method of discrimination, is characterized in that, of the present invention power distribution station low-voltage decision method is comprised the following steps:
(1) select simulation model, comprise two kinds of patterns: pattern 1 is that single district analyzed to emulation, be mainly used in understanding the present situation in certain station district or analyze transformation suggestion or assessment newly-built project; Pattern 2 is multiple districts to be carried out to macroscopic view understand, the relatively effect of different schemes, or analyze the most serious Tai of problem district, for the arrangement transformation plan of electrical network operation management department provides decision-making foundation;
(2), if select single analysis, without database input parameter, directly by edited GUI window input parameter, simulation result and optimal case suggestion also directly show by GUI window, convenient, flexible; The simulation result that GUI window shows is each point magnitude of voltage, distribution transforming outlet current value; If there is low-voltage problem, call the optimizer in m file, the model device parameters obtaining is exactly that optimum solution is automatically calculated and shows optimal solution;
(3) if select batch quantity analysis pattern, emulation is carried out in automatic batch mode, the demonstration of result and optimal case suggestion is exported with document form, the way of output is to use " xlswrite " function, record low voltage point, the terminal voltage value in each district according to simulation result, and mixed economy and technique effect, to each district, optimum solution is proposed.
3. power distribution station according to claim 1 low voltage method of discrimination, is characterized in that, described realistic model can be carried out the emulation under following state as required:
(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 described method also can expand, and comprises and introduces frequency analysis, 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 realistic model is all directly taken in the Powersystem of Simulink component library.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104880601A (en) * | 2014-11-28 | 2015-09-02 | 国家电网公司 | Low-voltage user low voltage investigation method based on normal distribution statistics |
| CN106229978A (en) * | 2016-09-27 | 2016-12-14 | 国家电网公司 | The pre-judging method of platform district low-voltage problem and system |
| 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 |
| CN108334675A (en) * | 2018-01-18 | 2018-07-27 | 北京航空航天大学 | The artificial intelligence process method and system of digital aircraft operating mode collection batch emulation |
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| 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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2014
- 2014-06-04 CN CN201410241912.8A patent/CN104036074B/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104880601A (en) * | 2014-11-28 | 2015-09-02 | 国家电网公司 | Low-voltage user low voltage investigation method based on normal distribution statistics |
| 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 |
| CN106229978A (en) * | 2016-09-27 | 2016-12-14 | 国家电网公司 | The pre-judging method of platform district low-voltage problem and system |
| 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 |
| CN108334675A (en) * | 2018-01-18 | 2018-07-27 | 北京航空航天大学 | The artificial intelligence process method and system of digital aircraft operating mode collection batch emulation |
| 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 |
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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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