CN105044487A - Transformer area line loss abnormity examination system and method - Google Patents
Transformer area line loss abnormity examination system and method Download PDFInfo
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Abstract
The invention mainly discloses a transformer area line loss abnormity examination system and method. The examination system comprises outlet wire switches installed at a transformer area and examination instruments installed at branch meter cases, wherein the examination instruments comprise three-phase CT meters, fast-assembling wire clamps and split-core current transformers; the fast-assembling wire clamps are installed at breaker outlet wire sides of the outlet wire switches and the branch meter cases for acquiring voltages; the split-core current transformers are installed at breaker outlet wire sides of the outlet wire switches and the branch meter cases for acquiring currents; and the three-phase CT meters are connected through the fast-assembling wire clamps and the split-core current transformers through lead wire, the three-phase CT meters are provided with GPRS systems for transmitting acquired voltage and current information to a master station system, the master station system can rapidly find abnormal points through data analysis, the determining time is shortened, the efficiency is improved, enterprise evaluation indexes of transformer area line loss are improved, and economic loss caused by the line loss is redeemed.
Description
Technical field
The present invention relates to the abnormal audit system of a kind of platform district line loss and method, be mainly used in the line loss investigation of platform district circuit.
Background technology
Informationization, robotization, the interactive direction being power information acquisition system and developing.On the basis gathering all standing, line loss data acquisition on circuit is the important goal in this developing direction, also there is blind spot in current this kind of line loss data acquisition, the branch line in feature Shi Gongbiantai district and the service conductor of user also do not have independent collector, add difficulty and the time of platform district line loss abnormality processing undoubtedly.Line loss per unit is an integrated technology economic target, and its size can indicate the management level of power supply enterprise, and closely bound up with its economic benefit.Line loss per unit is also that country implements energy-conservation policy, an important indicator of examination power supply enterprise.And low-voltage platform area line loss refer to voltage when 10kV and following the line loss that causes, it occupies very large proportion in the loss of electric system, owing to not easily discovering, and easily ignore, so take corresponding measure to reduce the loss of low-voltage platform area for China's electrical network, can save a large amount of electric energy, have very large loss-reducing and electricity-saving potentiality, order foreground partition line loss is started with can be divided three classes according to management layer: 1, theory wire loss; 2, technical loss; 3, line loss is managed.There is the following aspects in the place easily gone wrong most:
(1) for the platform district that line loss is higher, power department is difficult to take effective mode to investigate fault, because scope is larger, be likely line fault, be likely that metering outfit is abnormal etc., need to drop into a large amount of manpower and materials, and the manpower investigation work of the overwhelming majority does not all produce direct value;
(2) existing power information acquisition system is in blind area for piecemeal, segmentation line loss analyzing under platform district, and being difficult to provides effective means to assist to reduce line loss fault analysis scope;
(3) when platform district line loss is higher, need especially to reduce investigation scope by the mode of piecemeal, segmentation, but technological means can not effectively be supported at present.
Summary of the invention
The technical issues that need to address of the present invention are; the abnormal audit system of a kind of platform district line loss and method are provided; can blockette line loss analyzing by platform district line loss audit system; fast finding circuit abnormity point; improve investigation efficiency; improve the fellow peers' evaluation index of platform district line loss, retrieve the economic loss of line loss loss.
Technical scheme of the present invention is: the abnormal audit system of a kind of platform district line loss, audit system comprise be installed on platform district outlet switch, branch list case place check instrument, this is checked, and instrument comprises that three-phase CT shows, fast-assembling wire clamp and open-close type current transformer; Described fast-assembling wire clamp is arranged on the breaker outgoing line side at outlet switch, branch list case place, for gathering voltage; Described open-close type current transformer is arranged on the breaker outgoing line side at outlet switch, branch list case place, for gathering electric current; Described three-phase CT table is connected by wire with fast-assembling wire clamp and open-close type current transformer, and described three-phase CT table is provided with the GPRS communication module voltage of collection and current information being transferred to main station system.
Preferably, instrument comprises meter table case in described checking, described three-phase CT table is located in meter table case.
Preferably, described meter table case is provided with top matter storage lattice and bottom matter storage lattice, and three-phase CT table is fixed in the matter storage lattice of top, and described fast-assembling wire clamp and open-close type current transformer are placed on respectively when not using in two bottom matter storage lattices.
Preferably, the demarcation strip between described bottom matter storage lattice and top matter storage lattice is provided with the wire casing facilitating wire to pass through, and bottom matter storage lattice sidewall or diapire are provided with the through hole passed for wire.
Preferably, described meter table case back is provided with circular arc hoop component, and hoop component comprises the fixed head and portable plate that are fixed on meter table case back, and the xsect of fixed head and portable plate is circular arc.
In addition, present invention also offers the abnormal auditing method of platform district line loss based on above-mentioned audit system, described main station system comprises for timing or the artificial GPRS receiver module received from described GPRS communication module signal transmission, GPRS receiver module is connected with data analysis module, the voltage received, current information are gone out line loss per unit between common terminal variable and branch by built-in line loss calculation formulae discovery by described data analysis module, line loss per unit be less than 0 or be greater than 8% time emphasis check the electricity service condition of this bifurcation; Data analysis module by the line loss under line loss calculation formulae discovery branch's electricity and this branch's electricity between access point user electricity, when line loss per unit is greater than 8%, can confirm that this branch has problems; Data analysis module carries out analytical calculation according to branch's phase-splitting electricity with the access point user of corresponding phase, and when this phase line loss per unit is greater than 8%, this phase of lockable user has problems.
Preferably, the line loss per unit computing formula between described common terminal variable and branch is: line loss per unit=(the total electricity of public transformer terminals electricity-branch)/public affairs become total electricity.
Preferably, the line loss per unit computing formula under described branch electricity and this branch's electricity between access point user electricity is: line loss per unit=(branch's electricity-this branch service electricity)/branch's electricity.
Preferably, described data computation module comprises line loss formula custom block, and described data analysis module comprises the archives data module for importing the original electricity consumption data of community user under platform district.
After adopting technique scheme, tool of the present invention has the following advantages:
Image data and main station system intercommunication, reduce line loss fault coverage: by installing corresponding platform district line loss extremely check equipment at outlet switch, branch list case place, and utilize GPRS communication module long-range to main station system, reduce line loss fault coverage in conjunction with the line loss management system of local electric network on main station system; Meter, the public continuous data becoming summary table can also be shown in conjunction with resident, carry out blockette line loss analyzing.
There is provided can Fast Installation, dismounting measuring apparatus: tradition installs measuring apparatus at outlet switch, branch list case place, often needs to carry out power down process to circuit, and installs corresponding CT and measurement meter, and step is complicated.And when only investigating for line loss problem, also need to install fast, can remove and can reuse by fast dismantling after problem investigation, power down process is not needed when the fast-assembling wire clamp in the present invention and open-close type current transformer access, and installation and removal is very convenient, assembling and disassembling process does not cause any harmful effect to outlet switch, branch list case.
Accompanying drawing explanation
Accompanying drawing 1 is installation site of the present invention schematic diagram;
Accompanying drawing 2 is connection diagram that is of the present invention and isolating switch;
Accompanying drawing 3 is three-dimensional structure schematic diagram of the present invention;
Accompanying drawing 4 is back of the present invention schematic diagram;
The information about power schematic diagram that accompanying drawing 5 gathers for certain bifurcation.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
As shown in Figures 1 to 4, the abnormal audit system of a kind of platform district line loss, the outlet switch in platform district, branch list case place is provided with isolating switch 1, isolating switch is installed and is checked instrument, check that instrument comprises three-phase CT table 2, described three-phase CT table has picked out 7 wires, wherein 4 wire ends are respectively equipped with fast-assembling wire clamp 3, fast-assembling wire clamp can adopt Full-plastics sealed crocodile clip, other 3 wire ends are provided with open-close type current transformer 4, voltage is measured in the described isolating switch described in the access of fast-assembling wire clamp, access point is the A phase on isolating switch respectively, B phase, C phase and neutral line N phase, just 4 wires, utilize crocodile clip fast and easy can be linked on isolating switch and to record voltage, described open-close type current transformer is located at breaker outgoing line end and is measured leading-out terminal electric current, open-close type current transformer is mainly arranged on outlet circuit breaker output lead, three open-close type current transformers are one group, just join 3 wires, this type of current transformer is in installation, without the need to power-off in unloading process, only need in the on-state the bundle of outputs of isolating switch be placed in circular induction coil, very convenient, can according to actual conditions during practical operation, select the current transformer of different size: as 600A/5A, 400A/5A, 200A/5A, 100A/5A etc., described three-phase CT is provided with GPRS communication module collection voltage or current information being transferred to main station system in showing, data analysis can be carried out in time by data remote transmission to main station system, after using this audit system, effect is clearly: one, for 1 low-voltage platform area, abnormal equipment is checked and in conjunction with low-voltage platform area line loss analyzing management software by installing, low-voltage platform area line loss can be reduced to about 3% from 10%, left and right, family, each district 200 (monthly electricity consumption 100kWh), reduce loss 1400kWh/ platform district the moon, 1 county telephone central office's platform district quantity about 500, the moon reduces loss 700, 000kWh/ platform district, save loss about 350,000 yuan/month, two, the lifting of platform district line losses indices, the lifting of the aspect such as distribution network planning management, operational management, overhaul management, the marketing management of power use, measuring control, recording, checking, and charging management indirectly also promoted, General Promotion enterprises of managing electric wire netting are to the management level of platform district equipment and user.
As shown in Figure 3 to Figure 4, when concrete equipment installs collection, described audit system also comprises meter table case 5, due to outlet switch, the table case limited space of branch list case, be difficult to placement three-phase CT show, so this programme selects a special meter table case to place three-phase CT table meter, meter table case comprises casing and upper cover, use during casing and be arranged on outlet switch, branch list case side, convenient installation and dismounting, as preferably, described casing is provided with top matter storage lattice and bottom matter storage lattice, three-phase CT table is fixed in the matter storage lattice of top, described fast-assembling wire clamp and open-close type current transformer are placed in two bottom matter storage lattices respectively when not using, patrol officer is carried more convenient when not using, can put in the matter storage lattice of bottom together with open-close type current transformer with fast-assembling wire clamp after relevant wire harness batches, in addition in order to allow the equipment of checking wire harness when normally using not seem in disorder, demarcation strip between described bottom matter storage lattice and top matter storage lattice is provided with the wire casing 51 facilitating wire to pass through, on demarcation strip, wire casing can be established multiple, according to the number of conductors in the present invention, two bottom matter storage lattices can establish 3 wire casings and 4 wire casings respectively, make circuit clearer and more definite, bottom matter storage lattice sidewall or diapire are provided with the through hole 52 passed for wire, because fast-assembling wire clamp and open-close type current transformer all will be linked on isolating switch, so its wire is all finally to extend meter table case outside, conveniently these wires pass and are just provided with through hole, the dismounting of last conveniently meter table case, described meter table case back is provided with circular arc hoop component 53, hoop component comprises the fixed head 531 and portable plate 532 that are fixed on meter table case back, the xsect of fixed head and portable plate is circular arc, general meter table case is all fixed on utility poles or in PVC pipeline, so the shape of circular arc is very applicable to installation and removal.
The abnormal auditing method of concrete platform district line loss; mainly based on the line loss analyzing software of main station system; described main station system comprises for timing or the artificial GPRS receiver module received from described GPRS communication module signal transmission; GPRS receiver module is connected with data analysis module; statistical conversion chart or form show by data analysis module; the data received can be allowed to show more intuitively, and concrete analysis mode is as follows:
The voltage received, current information are gone out line loss per unit between common terminal variable and branch by built-in line loss calculation formulae discovery by described data analysis module, line loss per unit=total electricity of public transformer terminals electricity-branch/public affairs become total electricity, when line loss per unit is greater than 8%, it is generally acknowledged that its branch exists fault, major influence factors has: a, current transformer ratio are not right, and system no-load voltage ratio is larger than on-the-spot no-load voltage ratio; B. public transformer terminals error is comparatively large, walks fast.When line loss per unit is less than 0%, major influence factors has: a, current transformer ratio are not right, and system no-load voltage ratio is less than on-the-spot no-load voltage ratio; B, public transformer terminals error are comparatively large, walk slow; C, reverse polarity connection between current transformer and public transformer terminals; D, error connection between current transformer and public transformer terminals; E, open phase fault (electric current phase shortage, electric sampling open-phase) between current transformer and public transformer terminals; F, any screw between current transformer and public transformer terminals are not tightened; G, power factor problem.Line loss per unit be greater than 8% or be less than 0% time emphasis check the electricity service condition of this bifurcation; Data analysis module also can be used for analyzing access point user electricity under branch's electricity and this branch, namely data analysis module presses the line loss under line loss calculation formulae discovery branch's electricity and this branch's electricity between access point user electricity, computing formula is: line loss per unit=branch's electricity-this branch service electricity/branch's electricity, when line loss per unit is greater than 8%, must there be problem in this branch; Data analysis module also can be used for the access point user comparision of quantity of electricity analysis of branch's phase-splitting electricity with corresponding phase, namely certain phase line loss per unit is greater than 8%, other phase line loss per unit is in normal range, just can lock this phase user, the workload that investigation is got up like this will be lacked a lot, and effect is also best, it should be noted that in addition, public transformer terminals electricity is measured by public transformer terminals ammeter, and the total electricity of branch is according to checking that the current/voltage that instrument records calculates, and branch service electricity measures according to electric supply meter.
Data analysis module comprises the archives data module for importing community user electricity consumption data under platform district in addition, thus convenient by collection in worksite to data and the user power utilization data imported before relatively, also can import other community user and carry out Data Comparison, find differential point and improvement, in addition according to the actual conditions of each department, described data computation module comprises line loss formula custom block, namely user self-definedly can arrange total metering units or point metering units, also can the computing formula etc. of self-defined line loss.
Concrete analysis citing, with the data instance in Fig. 5, public transformer terminals electricity 104.55-(A1-1 branch electricity 46.08)-(A2-1 branch electricity 58.45)=0.02kWh, line loss electricity only has 0.02kWh;
And A1-1 branch A phase electricity 21.15-A phase user electricity 21.07=0.08kWh, line loss electricity only has 0.08kWh; A1-1 branch B phase electricity 10.12-B phase user electricity 10.08=0.04kWh, line loss electricity only has 0.04kWh; And A1-1 branch C phase electricity 14.81-C phase user electricity 14.78=0.03kWh, line loss electricity only has 0.03kWh;
And A2-1 branch A phase electricity 51.15-A phase user electricity 39.47=11.68kWh, line loss electricity just has 11.68kWh; A2-1 branch B phase electricity 7.29-B phase user electricity 7.26=0.03kWh, line loss electricity only has 0.03kWh; And A2-1 branch C phase electricity 0.01-C phase user electricity 0=0.01kWh, line loss electricity only has 0.01kWh; Problem just goes out on the A phase user of A2-1 branch as can be seen here, and specific aim is very strong.
During practical operation, during investigation bifurcation, method is as follows:
A. devices collect data is checked and coupling system main website carries out Correlative data analysis with platform district line loss is abnormal;
B. on-the-spot investigation a: platform is distinguished 3 ~ 5 people and gone to check, one personal responsibility 20 ~ 40 pieces ammeter, and carefully check on branch line or access point takes up that entrance line etc. is local the condition privately not overlapping electric wire, if any carefully checking with or without overlap joint vestige or burning arc vestige;
C. uncapping, it is complete to check, the necessary title of seal, please record if any abnormal conditions such as clock exception, warning, reverse polarity connection instructions during inspection;
D. observe line loss situation in a few days, as also having problem, then going to scene to check, uncapping and observing whether seal is intact, must problem be had if any infringement;
E. as without exception, just have reason to suspect other problems: a variety of causes such as load, whether line powering radius is excessive, whether wire diameter is too small are laid particular stress in branch's phase-splitting.
Below only just the present invention preferably example be described, but can not be interpreted as it is limitations on claims.The present invention not only limits to and above example, and its concrete structure allows to change, and those skilled in the art can make various change and distortion according to the present invention, only otherwise depart from spirit of the present invention, all should belong to the scope that claims of the present invention define.
Claims (9)
1. the abnormal audit system of a Zhong Tai district line loss, audit system comprise be installed on platform district outlet switch, branch list case place check instrument, it is characterized in that: this checks that instrument comprises three-phase CT and shows (2), fast-assembling wire clamp (3) and open-close type current transformer (4); Described fast-assembling wire clamp is arranged on the breaker outgoing line side at outlet switch, branch list case place, for gathering voltage; Described open-close type current transformer is arranged on the breaker outgoing line side at outlet switch, branch list case place, for gathering electric current; Described three-phase CT table is connected by wire with fast-assembling wire clamp and open-close type current transformer, and described three-phase CT table is provided with the GPRS communication module voltage of collection and current information being transferred to main station system.
2. the abnormal audit system of a kind of platform district according to claim 1 line loss, is characterized in that: instrument comprises meter table case (5) in described checking, described three-phase CT table is located in meter table case.
3. the abnormal audit system of a kind of platform district according to claim 2 line loss; it is characterized in that: described meter table case is provided with top matter storage lattice and bottom matter storage lattice; three-phase CT table is fixed in the matter storage lattice of top, and described fast-assembling wire clamp and open-close type current transformer are placed on respectively when not using in two bottom matter storage lattices.
4. the abnormal audit system of a kind of platform district according to claim 3 line loss; it is characterized in that: the demarcation strip between described bottom matter storage lattice and top matter storage lattice is provided with the wire casing (51) facilitating wire to pass through, bottom matter storage lattice sidewall or diapire are provided with the through hole (52) passed for wire.
5. the abnormal audit system of a kind of platform district according to claim 2 line loss; it is characterized in that: described meter table case back is provided with circular arc hoop component (53); hoop component comprises the fixed head (531) and portable plate (532) that are fixed on meter table case back, and the xsect of fixed head and portable plate is circular arc.
6. the abnormal auditing method of a Zhong Tai district line loss, it is characterized in that: based on the audit system in claim 1 to 5 described in any one, described main station system comprises for timing or the artificial GPRS receiver module received from described GPRS communication module signal transmission, GPRS receiver module is connected with data analysis module, the voltage received, current information are gone out line loss per unit between common terminal variable and branch by built-in line loss calculation formulae discovery by described data analysis module, line loss per unit be less than 0 or be greater than 8% time emphasis check the electricity service condition of this bifurcation; Data analysis module presses the line loss under line loss calculation formulae discovery branch's electricity and this branch's electricity between access point user electricity, when line loss per unit is greater than 8%, can confirm that this branch has problems; Data analysis module carries out analytical calculation according to branch's phase-splitting electricity with the access point user of corresponding phase, and when this phase line loss per unit is greater than 8%, this phase of lockable user has problems.
7. the abnormal auditing method of a kind of platform district according to claim 6 line loss, is characterized in that: the line loss per unit computing formula between described common terminal variable and branch is: line loss per unit=(the total electricity of public transformer terminals electricity-branch)/public affairs become total electricity.
8. the abnormal auditing method of a kind of platform district according to claim 6 line loss, is characterized in that: the line loss per unit computing formula under described branch electricity and this branch's electricity between access point user electricity is: line loss per unit=(branch's electricity-this branch service electricity)/branch's electricity.
9. the abnormal auditing method of a kind of platform district according to claim 6 line loss; it is characterized in that: described data computation module comprises line loss formula custom block, described data analysis module comprises the archives data module for importing the original electricity consumption data of community user under platform district.
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| CN109406919A (en) * | 2018-12-29 | 2019-03-01 | 国网山东省电力公司泰安供电公司 | Line loss detection device and line loss detection system |
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| CN113552399A (en) * | 2021-06-10 | 2021-10-26 | 杭州华春科技有限公司 | Multi-table set line loss phasing device and line loss phasing method |
| CN113552527A (en) * | 2021-06-10 | 2021-10-26 | 杭州华春科技有限公司 | Multi-meter set line loss meter-setting device and line loss meter-setting method |
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| CN113552527B (en) * | 2021-06-10 | 2024-03-22 | 杭州华春科技有限公司 | Multi-table set line loss table determining device and line loss table determining method |
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