CN214280947U - Power distribution automation system - Google Patents
Power distribution automation system Download PDFInfo
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- CN214280947U CN214280947U CN202022998636.3U CN202022998636U CN214280947U CN 214280947 U CN214280947 U CN 214280947U CN 202022998636 U CN202022998636 U CN 202022998636U CN 214280947 U CN214280947 U CN 214280947U
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Abstract
The utility model discloses a distribution automation system, which comprises a distribution automation unit and a metering unit, wherein the distribution automation unit comprises a first transformer, a second transformer, a zero sequence current transformer, a three-phase current transformer and a feeder terminal, and the first transformer, the second transformer, the zero sequence current transformer and the three-phase current transformer are arranged on a primary line of a distribution network; the metering unit comprises a metering module and a switch module; the first output end and the third output end of the first transformer and the first output end of the second transformer are connected with the feeder line terminal through the switch module; the second output end of the first transformer, the second output end of the second transformer and the third output end of the second transformer are connected with the feeder line terminal through the metering module; and the output end of the three-phase current transformer is connected with the feeder terminal through the metering module. The utility model has the advantages of simple structure, high installation efficiency, safety, reliability and the like.
Description
Technical Field
The utility model mainly relates to the technical field of electric power, concretely relates to distribution automation system.
Background
The distribution automation is based on a primary network frame and equipment, comprehensively utilizes the technologies of computers, information, communication and the like, and realizes the monitoring, control and rapid fault isolation of the distribution network through the information integration with related application systems. As shown in fig. 1, the distribution automation equipment includes primary equipment and secondary equipment, wherein the primary equipment includes a three-phase current transformer 104, a zero-sequence current transformer 103, and transformers (including a first transformer 101 and a second transformer 102), and the secondary equipment includes a feeder terminal 105 (FTU for short). The primary line of the power distribution network is connected to the outgoing line side after sequentially passing through the isolating switch 3 and the primary equipment. In addition, the on-column automatic switch complete equipment is an on-column intelligent automatic switch provided with an automatic control unit and a protection unit, can cut off the interphase short-circuit current, the load current and the zero-sequence current according to detection signals of a transformer and a current transformer, and has a reclosing function.
Along with distribution network's development, the continuous improvement of power supply reliability changes to supply and the interconnection circuit is the rapid growth, is convenient for the line loss management and control, need change at the interconnection and supply the point and install the strapping table meter device additional, installs the strapping table meter device additional and can make the wiring chaotic, increases the construction degree of difficulty, produces the influence to the working process. As shown in fig. 1, a metering transformer 4 (such as a voltage transformer and a current transformer) needs to be arranged between the disconnecting link and the PT1, the specific installation can be as shown in fig. 4 and 5, and the specific connection is as shown in fig. 2 and 3.
The on-site verification proves that the average installation time of the distribution automation equipment is 210 minutes, the installation time is prolonged by more than 1 hour after the metering device is additionally arranged, and the on-site discovery shows that the pole has more hanging equipment after the metering device is newly added, the trend of the electric wire is complicated, the installation difficulty is increased, the installation time is longer, the overhaul completion time is prolonged, and the power transmission time is delayed; and 2 more people need to be arranged for installation together, and if the hands are insufficient, the installation time is longer. Meanwhile, the distance between the 10kV cable and the ground can be reduced, so that the distance between the primary equipment and the secondary equipment is reduced, and the operation and maintenance risks of workers can be greatly increased.
In summary, in the process of installing the distribution automation equipment, the construction difficulty is increased due to the addition of the metering device, so that the installation time of each process is increased; in addition, on site, as more newly added equipment and more disconnected nodes are arranged on the electric pole, fault points are easy to generate; and the distance between the 10kV wire and the secondary equipment can be shortened, and the risk can be increased in later operation and maintenance.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in: problem to prior art existence, the utility model provides a simple structure, installation effectiveness are high, safe and reliable's distribution automation system.
In order to solve the technical problem, the utility model provides a technical scheme does:
a distribution automation system comprises a distribution automation unit and a metering unit, wherein the distribution automation unit comprises a first transformer, a second transformer, a zero sequence current transformer, a three phase current transformer and a feeder terminal, and the first transformer, the second transformer, the zero sequence current transformer and the three phase current transformer are arranged on a primary line of a distribution network; the metering unit comprises a metering module and a switch module; the first output end and the third output end of the first transformer and the first output end of the second transformer are connected with the feeder line terminal through the switch module; the second output end of the first transformer, the second output end of the second transformer and the third output end of the second transformer are connected with the feeder line terminal through the metering module; and the output end of the three-phase current transformer is connected with the feeder terminal through the metering module.
As a further improvement of the above technical solution:
the metering unit further comprises a box body, and the metering module and the switch module are both located in the box body.
And a switching module is also arranged in the box body and used for realizing the connection between the module in the box body and the external equipment of the box body.
The adaptor module comprises a mounting rack and a plurality of aviation plugs positioned on the mounting rack.
The box with the feeder terminal is installed at the same height of pole, perhaps install in on the pole of feeder terminal top.
The first transformer, the second transformer, the zero sequence current transformer and the three-phase current transformer are all arranged on an electric pole between an isolating switch and a feeder terminal of the power distribution network.
Compared with the prior art, the utility model has the advantages of:
the utility model cancels the existing mutual inductor for metering, and directly connects the output signals of the first transformer, the second transformer, the zero sequence current mutual inductor and the three-phase current mutual inductor of the primary equipment in the distribution automation unit to the metering module to realize the collection of electric energy; by eliminating the mutual inductor for metering and the corresponding wiring, the cost is reduced, and meanwhile, the installation efficiency is high, so that the power failure time is effectively shortened, and the power supply reliability is improved; by simplifying the primary wiring, the secondary fusion is realized, and the problems of more equipment and disordered wiring are solved; the disconnection position of the primary cable is reduced, and the height of the primary cable is raised, so that the hidden danger that the primary line is close to the feeder terminal is solved; in addition, an air switch is additionally arranged, the power-off restarting of the distribution automation unit can be controlled, the tripping problem caused by plugging and unplugging of an aviation plug is avoided, and the operation and maintenance difficulty is reduced.
The utility model discloses an aviation plug realizes the butt joint between metering unit and the external equipment, can handle the internal wiring of metering unit in advance before the installation, at the scene directly through aviation plug connect can, the installation is quick to improve on-the-spot installation effectiveness. In addition, 3 minutes are consumed when the box body is detached after the installation is finished, and the recycled metering unit can be used in other occasions after the aviation socket connected to the bottom is detached, so that no loss is caused. Because the lap is not newly added in the one-time wiring, the wiring equipment is reduced, the construction difficulty is greatly reduced, and the total installation time is greatly reduced.
Drawings
Fig. 1 is a primary circuit diagram of a distribution automation apparatus in the related art.
Fig. 2 is a secondary circuit diagram of a distribution automation device in the prior art.
Fig. 3 is a circuit diagram of a prior art meter box.
Fig. 4 is a view showing an installation structure of a distribution automation device in the related art (front view).
Fig. 5 is an installation structure view (side view) of a distribution automation device in the related art.
Fig. 6 is a primary circuit diagram of the distribution automation device of the present invention.
Fig. 7 is a secondary circuit diagram of the distribution automation device of the present invention.
Fig. 8 is an installation structure view (front view) of the distribution automation device of the present invention.
Fig. 9 is an installation structure diagram (side view) of the distribution automation device of the present invention.
Fig. 10 is a layout diagram of the components in the box body of the present invention.
Fig. 11 is a perspective view of the adaptor module according to the present invention.
Fig. 12 is a side view of the adapting module of the present invention
Illustration of the drawings: 1. a power distribution automation unit; 101. a first transformer; 102. a second transformer; 103. a zero sequence current transformer; 104. a three-phase current transformer; 105. a feeder terminal; 2. a metering unit; 201. a box body; 202. a metering module; 203. a switch module; 204. a concentrator; 205. a switching module; 2051. a mounting frame; 2052. an aviation plug; 3. an isolating switch; 4. a transformer for metering.
Detailed Description
The invention is further described with reference to the drawings and the specific embodiments.
As shown in fig. 6 and 7, the distribution automation system of the present embodiment includes a distribution automation unit 1 and a metering unit 2, where the distribution automation unit 1 includes a primary device and a secondary device, where the primary device includes a first transformer 101 (PT 1 in fig. 6), a second transformer 102 (PT 2 in fig. 6), a zero-sequence current transformer 103 and a three-phase current transformer 104, and the secondary device includes a feeder terminal 105 (FTU terminal), where the first transformer 101, the zero-sequence current transformer 103, the three-phase current transformer 104 and the second transformer 102 are sequentially installed on a primary line of a power distribution network, as shown in fig. 6; the metering unit 2 includes a metering module 202 and a switch module 203 (such as an air switch); the first output terminal 1TVa1, the third output terminal 1TVb1/2TVb1 of the first transformer 101 and the first output terminal 2TVc1 of the second transformer 102 are all connected to the feeder terminal 105 through the switch module 203, and the loops form a power loop to supply power to the feeder terminal 105; the second output terminal 1Tva2 of the first transformer 101, the second output terminal 2TVc2 of the second transformer 102 and the third output terminal 1TVb2/2TVb2 are all connected to the feeder terminal 105 through the metering module 202 (U1-U3 of fig. 7), which forms a voltage measurement loop; the output terminals of the three-phase current transformer 104 are connected to the feeder terminal 105 via the metering module 202 (I1-I3 of fig. 7), which forms a current measurement loop, as shown in fig. 7.
The utility model cancels the existing mutual inductor 4 for metering, and directly connects the output signals of the first transformer 101, the second transformer 102, the zero sequence current mutual inductor 103 and the three-phase current mutual inductor 104 of the primary equipment in the distribution automation unit 1 to the metering module 202 to realize the collection of electric energy; by eliminating the mutual inductor 4 for metering and corresponding wiring, the cost is reduced, and meanwhile, the installation efficiency is high, so that the power failure time is effectively shortened, and the power supply reliability is improved; by simplifying the primary wiring, the secondary fusion is realized, and the problems of more equipment and disordered wiring are solved; the disconnection position of the primary cable is reduced, and the height of the primary cable (such as a 10kV line) is raised (the former primary cable needs to be connected to the metering transformer 4, the distance between the primary cable and the feeder terminal 105 is short, and after the metering transformer 4 is cancelled, the lowest position of the corresponding primary cable is at the transformer position and is obviously higher than the former metering transformer 4 position), as shown in fig. 8 and 9, so that the hidden danger that the 10kV line is close to the FTU feeder terminal 105 is solved; in addition, an air switch is additionally arranged, the outage restart of secondary equipment in the distribution automation unit 1 can be controlled, the tripping problem caused by the fact that the aviation plug 2052 is plugged and unplugged is avoided, and the operation and maintenance difficulty is reduced.
In one embodiment, as shown in fig. 10 to 12, the metering unit 2 further includes a box 201, a concentrator 204, a junction box, a terminal block, and a switching module 205; wherein a metering module 202 (such as a meter), a switch module 203 (such as an ac air switch), a concentrator 204, a junction box and a terminal strip are all located in a box 201, and the specific arrangement of the components is shown in fig. 10. The adaptor module 205 includes a mounting rack 2051 and a plurality of, for example four, aviation plugs 2052 located on the mounting rack 2051, and is used for realizing connection between each component in the box 201 and equipment external to the box 201. Because the aviation plug 2052 is adopted to realize the butt joint between the metering unit 2 and external equipment, the internal wiring of the metering unit 2 can be processed in advance before installation, and the metering unit can be directly connected through the aviation plug 2052 on site, so that the installation is quick, and the field installation efficiency is improved. In addition, the operation time for detaching the box body 201 after the installation is finished is short, and the recycled metering unit 2 can be used in other occasions after the aviation plug 2052 connected to the bottom is detached, so that no loss is caused. Because the lap is not newly added in the one-time wiring, the wiring equipment is reduced, the construction difficulty is greatly reduced, and the total installation time is greatly reduced.
In one embodiment, as shown in fig. 8 and 9, the box 201 is installed at the same height of the pole as the feeder terminal 105, or on the pole above the feeder terminal 105, and the distance of the routing is short (the routing enters the metering unit 2 from the primary equipment along the pole and then reaches the feeder terminal 105), and it is also convenient to maintain the metering unit 2. In addition, the first transformer 101, the second transformer 102, the zero sequence current transformer 103, and the three phase current transformer 104 are all installed on an electric pole between an isolation switch 3 (such as an isolation switch) and a feeder terminal 105 of the power distribution network, and are close to the isolation switch 3.
During testing, when the current input is changed within the range of 10% -120% of the rated value, after the meters are connected in series, the influence errors on the current, the phase angle, the frequency, the power factor, the power, the electric energy and the like are all below five per ten thousand, the requirement of measuring errors is met, and data misalignment and protection misoperation caused by the fact that the measuring unit 2 is connected in series in an FTU feeder line loop can be avoided.
Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, a plurality of modifications and decorations without departing from the principle of the present invention should be considered as the protection scope of the present invention.
Claims (6)
1. The distribution automation system is characterized by comprising a distribution automation unit (1) and a metering unit (2), wherein the distribution automation unit (1) comprises a first transformer (101), a second transformer (102), a zero-sequence current transformer (103), a three-phase current transformer (104) and a feeder terminal (105), and the first transformer (101), the second transformer (102), the zero-sequence current transformer (103) and the three-phase current transformer (104) are installed on a primary line of a power distribution network; the metering unit (2) comprises a metering module (202) and a switch module (203); the first output end and the third output end of the first transformer (101) and the first output end of the second transformer (102) are connected with the feeder terminal (105) through the switch module (203); the second output end of the first transformer (101), the second output end of the second transformer (102) and the third output end are connected with the feeder terminal (105) through the metering module (202); the output end of the three-phase current transformer (104) is connected with the feeder terminal (105) through the metering module (202).
2. The power distribution automation system according to claim 1, characterized in that the metering unit (2) further comprises a box (201), the metering module (202) and the switching module (203) both being located within the box (201).
3. The distribution automation system of claim 2, characterized in that a patching module (205) is further provided within the cabinet (201) for enabling connection between the module within the cabinet (201) and a device external to the cabinet (201).
4. The distribution automation system of claim 3, the patching module (205) comprising a mounting rack (2051) and a plurality of aviation plugs (2052) located on the mounting rack (2051).
5. A distribution automation system according to any of claims 2-4 where the box (201) is mounted at the same height of the pole as the feeder terminal (105) or on the pole above the feeder terminal (105).
6. The distribution automation system according to any one of claims 1 to 4, characterized in that the first transformer (101), the second transformer (102), the zero sequence current transformer (103) and the three phase current transformer (104) are all mounted on an electric pole between a disconnector (3) and a feeder terminal (105) of the distribution network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022998636.3U CN214280947U (en) | 2020-12-14 | 2020-12-14 | Power distribution automation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022998636.3U CN214280947U (en) | 2020-12-14 | 2020-12-14 | Power distribution automation system |
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| Publication Number | Publication Date |
|---|---|
| CN214280947U true CN214280947U (en) | 2021-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022998636.3U Active CN214280947U (en) | 2020-12-14 | 2020-12-14 | Power distribution automation system |
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| Country | Link |
|---|---|
| CN (1) | CN214280947U (en) |
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- 2020-12-14 CN CN202022998636.3U patent/CN214280947U/en active Active
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