CN204177873U - A kind of out-of-balance current monitor of power distribution station - Google Patents
A kind of out-of-balance current monitor of power distribution station Download PDFInfo
- Publication number
- CN204177873U CN204177873U CN201420629229.7U CN201420629229U CN204177873U CN 204177873 U CN204177873 U CN 204177873U CN 201420629229 U CN201420629229 U CN 201420629229U CN 204177873 U CN204177873 U CN 204177873U
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- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 230000004907 flux Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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Abstract
The utility model discloses a kind of out-of-balance current monitor of power distribution station, described out-of-balance current monitor is contained on power distribution station, and current transformer connects current transducer, voltage comparator and light emitting diode successively, and light emitting diode connects monitoring panel.Its principle is: measure three phase unbalance current by current transformer, the DC voltage of below 5V is changed into by current transducer, compared by voltage comparator and reference voltage again, the result compared the most at last is presented on panel by light emitting diode (LED), electric current is larger, then bright light emitting diode (LED) is more, Timeliness coverage three-phase current unbalance.Effect of the present utility model is: structure is simple, cheap, can facilitate power management staff's Timeliness coverage three-phase imbalance, carry out wiring adjustment in time, avoiding tradition survey three-phase imbalance needs special messenger to go to survey to scene with Special Equipment, and the cycle is long, DeGrain.
Description
Technical field
The utility model relates to a kind of monitor, particularly relates to a kind of out-of-balance current monitor of power distribution station.
Background technology
Three-phase load unbalance has larger impact to substation transformer, first, three-phase load unbalance can increase the loss of transformer, when three-phase load reaches balance, the loss of transformer is minimum, under extreme case, when transformer operates in maximum imbalance, namely one is only had to power mutually, when all the other two phase loads are zero, three times when its loss on transmission is balance.Secondly because uneven time heavy load phase current can be very large, easily cause winding and transformer oil overheated, finally can cause insulation ag(e)ing quickening and oil quality deterioration, reduce transformer life, even burn winding.Again, three-phase load unbalance operation can cause transformer zero-sequence current excessive, and the existence of inside transformer zero-sequence current, zero sequence fluxes can be produced in the core which, these zero sequence fluxes can form loop in the oil tank wall of transformer or other hardwares, thus cause magnetic hysteresis and eddy current loss, cause the temperature anomaly of transformer local metal parts to raise, time serious, will the interruption of service of transformer be caused.
The final purpose of this monitor is exactly the three-phrase burden balance that will realize substation transformer, thus eliminates three-phase load unbalance to the impact of substation transformer.
Summary of the invention
The purpose of this utility model is the out-of-balance current monitor providing a kind of power distribution station, this monitor structure is simple, cheap, realizes the three-phrase burden balance of substation transformer, thus eliminate three-phase load unbalance to the impact of substation transformer, and practicality is very strong.
The utility model is achieved like this, a kind of out-of-balance current monitor of power distribution station, is characterized in that: described out-of-balance current monitor is contained on power distribution station, mainly comprise current transformer, current transducer, voltage comparator, light emitting diode (LED); Current transformer connects current transducer, voltage comparator and light emitting diode successively, and light emitting diode connects monitoring panel.
Out-of-balance current monitor shape described in the utility model can be rectangular parallelepiped, square, cylinder various shape.
Principle of work of the present utility model is: measure three phase unbalance current by current transformer, then the DC voltage of below 5V is changed into by current transducer, compared by voltage comparator and reference voltage again, the result compared the most at last is presented on panel by light emitting diode (LED), electric current is larger, then bright light emitting diode (LED) is more, so that power management staff's energy Timeliness coverage three-phase current unbalance, carry out wiring adjustment in time, thus realize three-phase equilibrium.
Effect of the present utility model is: structure is simple, cheap, can facilitate power management staff's Timeliness coverage three-phase imbalance, carry out wiring adjustment in time, avoiding tradition survey three-phase imbalance needs special messenger to go to survey to scene with Special Equipment, and the cycle is long, DeGrain.
Accompanying drawing explanation
Fig. 1 is principle schematic of the present utility model.
Fig. 2 is monitoring display panel schematic diagram of the present utility model.
In the drawings, 1, current transformer, 2, current transducer, 3, voltage comparator, 4, light emitting diode (LED).
Embodiment
Illustrate below in conjunction with accompanying drawing and be described in further detail embodiment of the present utility model, but the present embodiment is not limited to the utility model, every employing analog structure of the present utility model and similar change thereof, all should list protection domain of the present utility model in.
As shown in Figure 1, the utility model comes work and enforcement like this, a kind of out-of-balance current monitor of power distribution station, and it comprises current transformer 1, current transducer 2, voltage comparator 3, light emitting diode (LED) 4; Its principle of work is: the electric current sent here from current transformer 1 sends into current transducer 2, in current transducer 2, converting thereof into the DC voltage of below 5V, (size of voltage is determined by the electric current flowed into, electric current is larger, voltage is larger), the DC voltage that current transducer 2 is sent here by voltage comparator 3 and reference voltage compare, if voltage is higher, then control more pass diode (LED) 4 bright, if voltage is lower, then control a little less light emitting diode (LED) 4 bright.(current transducer in Fig. 1, voltage comparator and LED etc. have four covers, respectively for A phase, B phase, C phase, out-of-balance current place extracted current).
As shown in Figure 2, be panel figure of the present utility model, power distribution station out-of-balance current monitor is contained on power distribution station, and final object reaches three-phrase burden balance.In order to the situation making power management staff can know three-phase load, namely which phase load is large, which phase load is little, acquire A phase simultaneously, B phase, C phase three-phase current, and be presented on panel, measure out-of-balance current (zero-sequence current) by current transformer and on panel, show this out-of-balance current, when balancing the load, the light emitting diode (LED) of that a line of out-of-balance current is all dark, degree of unbalancedness is larger, the light emitting diode (LED) of that a line of out-of-balance current is just bright must be more, when load is extremely uneven, eight then all diodes (LED) are all bright.Simultaneously, panel also can show A phase, B phase and C phase current size (is also judge size of current by the number that the light emitting diode (LED) of corresponding line is bright, bright must be more, then electric current is larger), so which phase load of power management staff's energy Timeliness coverage is excessive, to go forward side by side Row sum-equal matrix, thus make three-phase load reach balance.
Claims (2)
1. an out-of-balance current monitor for power distribution station, is characterized in that: described out-of-balance current monitor is contained on power distribution station, mainly comprises current transformer, current transducer, voltage comparator, light emitting diode (LED); Current transformer connects current transducer, voltage comparator and light emitting diode successively, and light emitting diode connects monitoring panel.
2. the out-of-balance current monitor of a kind of power distribution station according to claim 1, is characterized in that: described out-of-balance current monitor shape can be rectangular parallelepiped, square, cylinder various shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420629229.7U CN204177873U (en) | 2014-10-29 | 2014-10-29 | A kind of out-of-balance current monitor of power distribution station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420629229.7U CN204177873U (en) | 2014-10-29 | 2014-10-29 | A kind of out-of-balance current monitor of power distribution station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204177873U true CN204177873U (en) | 2015-02-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420629229.7U Expired - Fee Related CN204177873U (en) | 2014-10-29 | 2014-10-29 | A kind of out-of-balance current monitor of power distribution station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204177873U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116500328A (en) * | 2023-06-06 | 2023-07-28 | 无锡市锡山湖光电器有限公司 | High-precision three-phase current sensor |
-
2014
- 2014-10-29 CN CN201420629229.7U patent/CN204177873U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116500328A (en) * | 2023-06-06 | 2023-07-28 | 无锡市锡山湖光电器有限公司 | High-precision three-phase current sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150225 Termination date: 20181029 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |