CN203746069U - Low-voltage line loss analyzing system in public transformer power supply area - Google Patents

Low-voltage line loss analyzing system in public transformer power supply area Download PDF

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Publication number
CN203746069U
CN203746069U CN201320770773.9U CN201320770773U CN203746069U CN 203746069 U CN203746069 U CN 203746069U CN 201320770773 U CN201320770773 U CN 201320770773U CN 203746069 U CN203746069 U CN 203746069U
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line loss
power supply
low
data
voltage line
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CN201320770773.9U
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李明
于善华
杨志新
廉璟
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XICHUAN COUNTY POWER BUREAU
State Grid Corp of China SGCC
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XICHUAN COUNTY POWER BUREAU
State Grid Corp of China SGCC
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Abstract

The utility model discloses a low-voltage line loss analyzing system in a public transformer power supply area. The system comprises a main processing module, a station meter information addressing device and a distributed data acquisition module; basic data at an electricity-utilization client side is collected, the network structure of a station meter in the public transformer power supply area is updated automatically, an actual line loss analysis report is formed rapidly according to a theoretical line loss mode in the power supply area, and improvement opinions and suggestions are provided intelligently, so as to generate a specific solution. The low-voltage line loss analyzing system provided by the utility model has the benefits as follows: the theoretical line loss in the power supply area can be computed automatically and rapidly, meanwhile, the network structure of the station meter in the public transformer power supply area is updated automatically, an improvement plan is put forward according to influences of various factors on the theoretical line loss, the defects that the low-voltage power supply area is lack of data and the theoretical line loss is difficult to compute are overcome, and the low-voltage line loss analyzing system deserves wide popularization and application.

Description

A kind of Gong Biantai district Low-voltage Line Loss analytic system
Technical field
The utility model relates to Regulation repair apparatus and technical field, relates in particular to a kind of Gong Biantai district Low-voltage Line Loss analytic system.
Background technology
Electric energy be transferred to from generating plant customer demand side need to through much defeated, the electrical equipment such as become, join, in the conveying and assigning process of electric energy, due to the existence of electrical equipment resistance and reactance, when electric current flows through electrical equipment, just have certain energy loss to produce, the logical normal power loss of this energy loss and two kinds of forms of electric energy loss represent.Power attenuation is instantaneous value, and electric energy loss is the synthesis result of power attenuation on certain hour, is referred to as line loss.
In low-voltage network, the public powering mode that becomes mainly contains following two large features: the one, and the confession power distribution units such as circuit, transformer, user terminal are responsible for installation by electric company, and safeguard throughout one's life, manage; The 2nd, line loss loss is born by electric company completely, so the operation benefits of line loss per unit and company is closely bound up, has become an important overall target weighing and examine power supply enterprise's production technology and management level.
Tradition Tai district low voltage line loss rate determines that by each power supply unit coefficient Hou Fentai district assigns, although the many factors such as definite line loss performance assessment criteria of assigning with reference to the actual conditions of line load, subscriber's meter meter, historical line loss, theory wire loss and higher level of coefficient, but there is the hysteresis quality of control in this mode, can not reflect in real time and analyze current line loss situation, also be unfavorable for determining best improvement scheme according to line loss situation.
Application number: 200910303895.5 Chinese patent discloses a kind of line Loss Analysis for Power Distribution Network system, although can obtain basic line loss data, and carry out drawing line loss information after data processing, but this analytic system cannot be upgraded network station table information automatically on the one hand, be unfavorable for the quick location to trouble spot when circuit is abnormal, on the other hand, after data analysis, cannot immediately provide effectively concrete improvement project.
Utility model content
The purpose of this utility model is to solve the problems of the technologies described above, a kind of Gong Biantai district Low-voltage Line Loss analytic system is provided, by gathering the basic data of electricity consumption client and automatically upgrading the network structure that station, Gong Biantai district is shown, according to of living in domain tyeory line loss model, form fast practical line loss analysis report, and intelligence provides improvement idea and suggestion, generate concrete solution.
For achieving the above object, the technical solution adopted in the utility model is: a kind of Gong Biantai district Low-voltage Line Loss analytic system, comprise core processing module, stand and show the data acquisition module of information device for addressing and distributed setting, described data acquisition module connects core processing module by data transmission module signal, core processing module described in the table information device for addressing wireless connections of described station.
Described data acquisition module is the energy monitor table that is arranged at transformer station and/or user side.
Described station table information device for addressing comprises the carrier signal transceiver, data register and the data encoder that utilize reversible line to connect in turn.
Described core processing module comprises external device and the terminating machine with carrier signal transceiver.
Described data transmission module is wired optical cable or wireless communication platform.
A using method for Gong Biantai district Low-voltage Line Loss analytic system, comprises the steps:
1) described Gong Biantai district Low-voltage Line Loss analytic system is installed by power supply station of Ge Tai district, requires to transfer out the actual main wiring diagram of described terminating machine Zhong Tai district's circuit, and generate real-time station table according to system wiring figure;
2) on the basis of main wiring diagram, typical platform district distribution wiring diagram, payload, character and feature, the power consumption of studying each region in time and Seasonal fluctuation etc., set up the theory wire loss model based on multiple computing method, and stores synchronized is in described terminating machine;
3) realize the data acquisition of low-tension transformer and/or user side by described data acquisition module, be uploaded to core processing module through data transmission module and form and record form, and continuous data is plotted to data and curves, show in real time;
4), according to image data, on existing power supply data basis, Tai district, make A+E, and by comparing calculation, draw the input data that line loss model needs;
5) bring input data into line loss model and calculate, and comprehensively analyze the unbalanced various situations of three-phase load, relatively theory wire loss and practical line loss, show that line loss parameter is line loss per unit;
6) contrast affects the parameter that line loss per unit is larger, finds out parameter place node, and real-time update terminating machine station table information is also shown information device for addressing by station node is carried out to addressing location;
7) by various parameters and the line loss parameter generating report forms that calculates, and go out most suitable adjustment scheme in database according to parameter search, analytical error reason also forms assessment report.
Native system can be by the basic data of collection electricity consumption client and according to of living in domain tyeory line loss model, the normal and abnormal form of formation control platform district line loss per unit, and form can provide the principal element that causes line loss per unit abnormal.
The beneficial effect of native system not only shows quick computer board domain tyeory line loss per unit automatically, can also automatically upgrade the network structure of station, Gong Biantai district table simultaneously, and the impact on Molded Line loss rate according to various factors, improvement project is proposed, the shortcoming that has overcome the deficient theory wire loss dyscalculia of low-voltage platform area data, should be widely promoted and use.
Brief description of the drawings
Fig. 1 is the utility model system architecture schematic diagram.
Fig. 2 is the utility model using method process flow diagram.
Embodiment
A kind of Gong Biantai district Low-voltage Line Loss analytic system, comprise core processing module, stand and show the data acquisition module of information device for addressing and distributed setting, data acquisition module connects core processing module by wired optical cable or wireless communication platform, core processing module described in the wireless connections of the table information of standing device for addressing.
Data acquisition module is the energy monitor table that is arranged at transformer station and/or user side, can gather the parameters such as magnitude of voltage, current value, performance number, power factor, charge value, harmonic wave, frequency of power cut, reactive-load compensation.
The table information of standing device for addressing comprises the carrier signal transceiver, data register and the data encoder that utilize reversible line to connect in turn, and core processing module comprises external device and the terminating machine with carrier signal transceiver.
A kind of Gong Biantai district Low-voltage Line Loss analytic system, its implementation comprises the steps:
1) described Gong Biantai district Low-voltage Line Loss analytic system is installed by power supply station of Ge Tai district, requires to transfer out the actual main wiring diagram of described terminating machine Zhong Tai district's circuit, and generate real-time station table according to system wiring figure;
Main wiring diagram, mainly comprises following parameter:
Backbone and entrance line wire type, as LGJ-50 or NLV-16 etc.; Line length between electric pole, as 50 × 4, the meaning is that span is 50 meters, four-wire system; Table case case number (CN) (electric supply meter place table case numbering); Table case is separate, as A, AB, ABC etc.; From electric pole to the line length table case, as 25 × 4, the meaning is 25 meters of length, four-wire system;
The matrix section of standing, mainly comprises following parameter:
Numbering; Platform district title (as so-and-so village or so-and-so community); Transformer examination summary table beginning code; Only code of transformer examination summary table; Mutual inductor multiplying power; The whole month loss on transmission electric weight;
All data are all stored in the data-carrier store of terminating machine, and by the SQL database management of Pervasive series, database will import data processing on the one hand for can inquire about form, coordinate on the one hand the mapping software model implementation data of map GIS to import, can realize the Fast Drawing of main wiring diagram.
2) on the basis of main wiring diagram, typical platform district distribution wiring diagram, payload, character and feature, the power consumption of studying each region in time and Seasonal fluctuation etc., set up the theory wire loss model based on multiple computing method, and stores synchronized is in described terminating machine;
Wherein, distribution wiring diagram comprises network structure, line length, wire diameter and the power supply number of phases;
The foundation of theory wire loss model is the core of this line loss analysis system, and it is for the various parameters that may obtain, and transfers respectively different models and carry out the COMPREHENSIVE CALCULATING of line loss per unit;
Line loss model what realize software application is MATLAB model emulation software, Model Calculating Method mainly contains following several:
The first is taking sample rate current as model parameter, the mean value of calculating sampling electric current and root-mean-square value, utilize both equivalent relations to carry out line loss calculating, current capacity curve is equivalent to straight line by it, thereby overcome reometer sampled data instantaneity, the accurate low shortcoming of rank.This model is mainly applicable to computer board district electric current branch line complicated situation, according to main line and a line current, the feature of successively decreasing according to ' bamboo joint type ' rule, suppose following condition, the one, a line length of all specifications is identical, entrance line number is equal, and load is evenly distributed, and entrance line distributes identical on branch line; The 2nd, all electrical node voltage equates; The 3rd, all entrance lines are equal in length, it is identical to load; The 4th, branch line is evenly distributed on main line, and this is a kind of more novel line loss computation model;
The second is loss of voltage model, utilizes the ratio of power loss rate and loss of voltage rate to carry out rough calculation to low-voltage network theory wire loss, and can derive power attenuation rate according to setting loss formula is COS with the ratio of voltage loss rate 2φ -1, wherein, φ be sampling electrical network for power-factor angle, because this model computation process is simple, calculate the data that need few, so can be set at parameter acquisition less, in the situation that needs to respond fast, call, but its error calculated is bigger than normal, is only applicable to estimation;
The third model is that line resistance loss and the loss of transformer copper loss are replaced with the fixing substitutional resistance loss of hypothesis, and the information that it need to be collected is few, and irrelevant with electric network composition.Due to rural area, platform district has close load nature of electricity consumed, for the rural power grids with the less present situation of reactive power compensation capacity, adopt single equivalent model can make to calculate more for convenience, but for platform district, city, between load, load nature of electricity consumed difference is larger, equivalent model also needs to carry out repeatedly trend by the set method of operation of the original substitutional resistance of electrical network and hypothesis and calculates, and cooperation calculates line loss electric weight from meritorious, the idle and voltage readings of circuit head end measuring apparatus collection.It is also the simulation curves that can use MATLAB that trend is calculated, and transfers equilibrator curve, load curve and power curve and carries out, and be made up of the experiment form of statistical study checkout result repeatedly;
Except above method, can also be according to making computation model when the actual conditions of foreground partition, for example introduce genetic algorithm or artificial neural network algorithm is set up model of mind, this is a kind of fuzzy control method.After repetition test, determine the most applicable discrete domain when foreground partition in system, to realize the optimum control that is applicable to Self-variation.
3) realize the data acquisition of low-tension transformer and/or user side by described data acquisition module, be uploaded to core processing module through data transmission module and form and record form, and continuous data is plotted to data and curves, show in real time;
Data acquisition end can, by wired or wireless form, be pooled to system terminal computing machine by Information Monitoring.Information Monitoring comprises output voltage values, current value, performance number, power factor, charge value, harmonic wave, frequency of power cut, reactive-load compensation etc.;
In the time that the theory wire loss that carries out platform district calculates, the workload of collecting raw data is very large.Therefore line loss is calculated and is not only selected suitable computation model, ensures the accuracy of result of calculation, also will consider accurately to gather and calculate service data data and electrical equipment parameter data;
Transformer station of the Yi Moutai district collection situation of a day is example: gather with the service data data of calculating and comprise: the record of power, electric current, voltage, power factor and the whole day delivery of input when running on time, output in transformer station, circuit, measuring apparatus etc. 0~24 hour; The positive point load that representative is in a few days recorded is chosen in utilization, supposes that one hour internal loading fixes, the daily load curve of drawing; The period substation transformer secondary summary table calculating copy total electric weight of seeing electric weight and transformer station's Source of Gateway Meter; The actual motion hourage of the interior each relevant operation vigour part of period calculating etc.;
Electrical equipment parameter data mainly comprises rating data and the nameplate data etc. of moving the controller switching equipment such as substation transformer, reactor, capacitor in the specifications and models of wire that electrical network uses and conductor length and electrical network.
4), according to image data, on existing power supply data basis, Tai district, make A+E, and by comparing calculation, draw the input data that line loss model needs;
The input data of line loss model mainly refer to all kinds of factors of Low-voltage Line Loss fluctuation, and it not only comprises multiple inherent data, such as conductor resistance, transformer model etc., also comprises working voltage, running current, power factor etc.The former can be by calling the corresponding original nameplate parameter of terminating machine database lookup, and latter need to be weighted, is averaged, triangular transformation etc. method is calculated, and calculates and realizes by the function transaction module of MATLAB;
The reading of the each user's power electric meter of segment record access time, asks in platform district the delivery of the calculating line segment of dividing, computational scheme substitutional resistance; The existing power supply data in Dui Tai district are made on the basis of A+E, choose representational circuit and representational time period and measure daily load change curve, in the hope of being averaged electric current, load curve characteristic coefficient etc.
5) bring input data into line loss model and calculate, and comprehensively analyze the unbalanced various situations of three-phase load, relatively theory wire loss and practical line loss, show that line loss parameter is line loss per unit;
The calculating of theory wire loss model for be single parameter, must analyze through comprehensive, especially consider the unbalanced situation of three-phase load, the low voltage electric network in Dang Tai district is in the time of three-phase load non-equilibrium state, and out-of-balance current will be in alternate generation, the generation of out-of-balance current not only increases the loss in phase line, also caused the loss on the neutral line, thereby increased total line loss, if three-phrase burden balance, vector is zero so, does not have neutral line loss;
Suppose that certain three-phase four-wire system circuit total load electric current is 3I, three-phase current unbalance, one is 2I mutually, and another two-phase is respectively 0.5I, and neutral current is 1.5I, power attenuation during with three-phase equilibrium compared with, loss has increased by 1.25 times, and three-phase imbalance can make line loss obviously increase as can be seen here, supposes that all load is by a power supply mutually, power attenuation has increased by 5 times during than complete equipilibrium, should become the first-selection of line loss model outside calculating and falls damage measure so adjust three-phrase burden balance.
6) contrast affects the parameter that line loss per unit is larger, finds out parameter place node, and real-time update terminating machine station table information is also shown information device for addressing by station node is carried out to addressing location;
Terminating machine finds after the node of fault parameter place, on the one hand, this nodal information real-time update is presented in main wiring diagram and station table information, on the other hand node address information is packed, and be sent to station table information addressing system through connected carrier signal transceiver, node address information enters data register, thereby and decode and find out the energy monitor table position of malfunctioning node through data encoder, and at energy monitor table end alarm, be convenient to testing staff and locate rapidly.
7) by various parameters and the line loss parameter generating report forms that calculates, and go out most suitable adjustment scheme in database according to parameter search, analytical error reason also forms assessment report;
Yi Mou village in March, 2013 supply and distribution is example, and the loss of table meter is kilowatt hour every days 5, and wire loss is kilowatt hours every days 102, and institute's statistical line losses rate is 14.01%;
Preliminary detection after system introducing in April, find that this village exists the serious imbalance of three-phase load, load skewness, allotment displacement to put the problems such as concentrated, main line is undersized, system can generate following contrast scheme according to these problems: scheme one is invested less, only be optimized after load wiring, 47 table the separate of case are adjusted, Molded Line loss rate will drop to 8.42% by calculating; Scheme two is the separate and distribution transforming position of adjustment form case, and the bar position of changing transformer changes, and line loss per unit can drop to 6.74%, compared with scheme one, though produce better effect, invests larger; Scheme three is replaced by script wire after 70 squares by 35 squares on the basis of scheme two, now calculate line loss per unit and can drop to 3.71%, through comparing, system can be recommended the third scheme, after electric company transforms according to suggested design, the actual line loss per unit that completes in this platform district of village in April is 3.86%, and benefit is obvious.
For the utility model system effect in practice, can show by following data:
Taking electric company of A county of Henan Province as example, Gong Biantai district, whole county number is 945, the higher 162Ge Tai of Low-voltage Line Loss district is wherein adopted to line loss analysis system provided by the utility model, thereby can form fast the analysis report to this TV station district line loss situation.According to analysis report, 89 in these districts are carried out falling damaging and rectified and improved, and be distributed in rural area 56Ge Tai district distribution transforming and carried out capacity-increasing transformation concentrating, rectification Hou Tai district low voltage line loss rate is all below 8%, what effect was best can reach 4.72%, not only alleviate the contradiction that urban residents' power load constantly increases, distribution transformer load is overweight, and effectively reduced the Low-voltage Line Loss in platform district;
Electric company of B county of Henan Province plans to complete in 2013 the construction in 26 electrified villages, 5,280,000 yuan of budget funds, applying after native system, the preferred plan of utilizing line loss software to calculate is transformed, 3,830,000 yuan of actual investments, utilize savings to build again 9 electrified villages, really realized the object of doing more eventful feelings by limited fund;
Electric company of C county of Henan Province from 2013 beginning of the years so far, company drops into altogether 6,380,000 yuan and carries out the low voltage electric network transformation of Liao Tai district and distribution transforming increase-volume, Shi Quan company low voltage line loss rate by 2012 8.73% be reduced to current 7.82%, estimate that electricity sales amount in 2013 completes at 3.95 hundred million thousand ten thousand o'clock, Low-voltage Line Loss loss electric weight is compared with reducing last year at 5,260 thousand thousand ten thousand o'clock, the comprehensive sale of electricity electricity price in the whole county completes 680 yuan of calculating during by every megawatt, increases by 357.6 ten thousand yuan of the performance of enterprises;
Electric company of D county of Henan Province is used this line loss analysis system to carry out the calculating of low pressure theory wire loss, and carry out electric network reconstruction He Tai district's increase-volume according to result of calculation, client's repair call that company's good service phone 95598 customer service systems are accepted obviously reduces, good service level obviously improves, and incoming call repair call sum reduces 1270 over the same period last year.
So, the utility model system is in improving security, reliability and the quality of voltage of electrical network, obtain users' consistent favorable comment, promoted the social image of power supply enterprise, for good service and the electricity charge recovery operation of power supply station of basic unit have been established good social base.

Claims (5)

1. a Zhong Gongbiantai district Low-voltage Line Loss analytic system, it is characterized in that: system comprises core processing module, the data acquisition module of table information device for addressing and distributed setting of standing, described data acquisition module connects core processing module by data transmission module signal, core processing module described in the table information device for addressing wireless connections of described station.
2. a kind of Gong Biantai as claimed in claim 1 district Low-voltage Line Loss analytic system, is characterized in that: described data acquisition module is the energy monitor table that is arranged at transformer station and/or user side.
3. a kind of Gong Biantai as claimed in claim 1 district Low-voltage Line Loss analytic system, is characterized in that: described station table information device for addressing comprises the carrier signal transceiver, data register and the data encoder that utilize reversible line to connect in turn.
4. a kind of Gong Biantai as claimed in claim 1 district Low-voltage Line Loss analytic system, is characterized in that: described core processing module comprises external device and the terminating machine with carrier signal transceiver.
5. a kind of Gong Biantai as claimed in claim 1 district Low-voltage Line Loss analytic system, is characterized in that: described data transmission module is wired optical cable or wireless communication platform.
CN201320770773.9U 2013-11-30 2013-11-30 Low-voltage line loss analyzing system in public transformer power supply area Expired - Fee Related CN203746069U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106950440A (en) * 2017-02-14 2017-07-14 国网新疆电力公司伊犁供电公司 Transformer station's metering critical point quickly judges alarm method extremely
CN109242722A (en) * 2018-09-14 2019-01-18 国网河北省电力有限公司电力科学研究院 Platform area line loss on-line monitoring method, system and terminal device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106950440A (en) * 2017-02-14 2017-07-14 国网新疆电力公司伊犁供电公司 Transformer station's metering critical point quickly judges alarm method extremely
CN106950440B (en) * 2017-02-14 2019-08-13 国网新疆电力公司伊犁供电公司 Substation's metering critical point is abnormal quickly to judge alarm method
CN109242722A (en) * 2018-09-14 2019-01-18 国网河北省电力有限公司电力科学研究院 Platform area line loss on-line monitoring method, system and terminal device
CN109242722B (en) * 2018-09-14 2020-10-09 国网河北省电力有限公司电力科学研究院 Online monitoring method and system for line loss of transformer area and terminal equipment

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