CN211579307U - On-site operation box for transformer substation - Google Patents
On-site operation box for transformer substation Download PDFInfo
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- CN211579307U CN211579307U CN202020349745.XU CN202020349745U CN211579307U CN 211579307 U CN211579307 U CN 211579307U CN 202020349745 U CN202020349745 U CN 202020349745U CN 211579307 U CN211579307 U CN 211579307U
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- 230000007246 mechanism Effects 0.000 claims abstract description 5
- 238000012544 monitoring process Methods 0.000 claims description 16
- 230000009471 action Effects 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims description 4
- 230000007420 reactivation Effects 0.000 claims description 3
- 230000009191 jumping Effects 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract 1
- 230000006872 improvement Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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Abstract
The utility model discloses a local operation box for a transformer substation, which adopts a fully-sealed metal case, and a re-acting relay loop, a tripping and closing operation loop and a voltage switching loop are integrated in the case; the re-acting relay loop is connected with the tripping and closing operation loop; adopting a fully-sealed metal case; an aviation plug is externally adopted by the case, three plug-and-play cable aviation plugs are arranged and respectively correspond to the re-acting relay circuit, the tripping and closing operation circuit and the voltage switching circuit; the re-acting relay loop is connected with the protection device through a cable aviation plug; the tripping and closing operation loop is connected with an external operation mechanism through a cable aviation plug; and the voltage switching loop is connected with the bus voltage and the PT disconnecting link through a cable aviation plug. The on-site operation box shortens the on-site operation time in a plug-and-play mode and improves the maintenance efficiency; the secondary circuit of the transformer substation system is simplified in a local installation mode, the reliability of the operation box is improved, and the method can be applied to local transformer substations.
Description
Technical Field
The utility model relates to a change control box on spot for transformer substation belongs to transformer substation's secondary equipment control box field.
Background
In recent years, after a local protection scheme is adopted in a substation, an operation box is used as an interface between primary equipment and secondary equipment, and a new design is required to meet new requirements. The existing traditional operation box is difficult to install on the spot due to large volume and redundant loops. Therefore, the operation box which is suitable for being installed on site and is convenient for shortening the replacement time of the device in a plug-and-play mode and improving the maintenance efficiency becomes a problem to be solved by power consumers, equipment manufacturers and the like.
SUMMERY OF THE UTILITY MODEL
The purpose is as follows: in order to overcome the defects in the prior art, the utility model provides a local operation box for a transformer substation, which shortens the time of field operation in a plug-and-play mode and improves the maintenance efficiency; the on-site protection device can be installed on the primary side on site in an on-site installation mode, and the requirement of an on-site protection overall scheme is met.
The technical scheme is as follows: in order to solve the technical problem, the utility model discloses a technical scheme does:
a local operation box for a transformer substation comprises a case, wherein a re-acting relay loop, a tripping and closing operation loop and a voltage switching loop are integrated in the case in a partition manner; the re-acting relay loop is connected with a tripping and closing operation loop;
the adoption of a fully-sealed metal case; the case adopts a standard aviation plug externally, and is provided with three plug-and-play cable aviation plugs which respectively correspond to a re-acting relay loop, a tripping and closing operation loop and a voltage switching loop;
the re-acting relay loop is connected with the protection device through a cable aviation plug;
the tripping and closing operation loop is connected with an external operation mechanism through a cable aviation plug;
and the voltage switching loop is connected with the bus voltage and the PT disconnecting link through a cable aviation plug.
In some embodiments, the override relay circuit comprises an override circuit, a post-close circuit;
the system comprises a plurality of control circuits, a plurality of control circuits and a plurality of control circuits, wherein the control circuits are connected with the control circuits through the control circuits; the signal sent by the protection device is input into the re-acting circuit, and the re-acting relay is started through the re-acting circuit, so that a plurality of re-acting relay nodes act to achieve the function of signal re-acting;
the post-closing loop is formed by connecting two post-closing electric appliances in series, and the hand jumping signal and the hand closing signal sent by the protection device are input into the post-closing loop to start the post-closing electric appliances.
Further, in some embodiments, the override relay circuit further comprises a power supply monitoring circuit; the power supply monitoring circuit comprises a power supply indicating lamp and two normally-open normally-closed relays which are connected in series, the power supply indicating lamp is connected with a normally-open node of the normally-open normally-closed relay in series, when a direct-current power supply passes through the normally-open normally-closed relay, the normally-open node is closed, the indicating lamp is on, and the normally-closed node is opened simultaneously, so that the power supply monitoring function is realized.
In some embodiments, the reset circuit includes a plurality of sets of reset function circuits: reclosing circuit, manual closing circuit, manual tripping circuit and re-tripping circuit.
In some embodiments, the tripping and closing operation circuit comprises a tripping circuit and a closing circuit, and the tripping circuit and the closing circuit are both formed by a single current type relay; and the tripping and closing operation loop is connected with a re-acting loop in the re-acting relay loop, and outputs a related action node signal after receiving a signal of the re-acting loop.
Further, the action node signal comprises a node closing signal and a trip signal.
In some embodiments, the voltage switching circuits include two sets of voltage switching circuits; each group of voltage switching circuits comprises a double-position relay and a plurality of unit relays, wherein the double-position relay and the unit relays are mutually connected in series to form a group of voltage switching circuits; the first group of voltage switching circuits is connected with the first path of bus voltage and the PT disconnecting link, and the second group of voltage switching circuits is connected with the second path of bus voltage and the PT disconnecting link;
the voltage switching circuit receives two paths of bus voltage input and PT disconnecting link position signals, and after the two paths of bus voltage input, corresponding voltage is selected to be switched and output according to the position of the PT disconnecting link.
In some embodiments, the cable aviation plug is a circular connector of a standard interface.
In some embodiments, the in-place operation box for the transformer substation is provided, and the power indicator lamp is positioned on the front panel of the chassis.
In some embodiments, the on-site cabinets are mounted on both sides of the outdoor cabinet using side-wall brackets or rails.
Has the advantages that: the utility model provides a change control box on spot for transformer substation.
Drawings
Fig. 1 is a schematic diagram of the internal structure of the present invention.
FIG. 2 is a schematic view of each circuit of the operation box of the present invention;
in the figure: the device comprises a case 1, a re-acting relay circuit 2, a tripping and closing operation circuit 3, a voltage switching circuit 4, a cable aviation plug 5, a protection device 6, an operation mechanism 7, a re-acting relay K1, a switching post-electric appliance K2, a power indicator lamp L, a normally open normally closed relay K3, a current type relay K4, a position monitoring relay K5, a double-position relay K6 and a plurality of unit relays K7.
Detailed Description
The invention is further described with reference to the following figures and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The specification is as follows: the utility model discloses an improvement point lies in hardware component and configuration and connected mode thereof.
As shown in fig. 1 to 2, the utility model provides a local operation box for a transformer substation, which adopts a fully-sealed metal case, and a re-acting relay loop 2, a tripping and closing operation loop 3 and a voltage switching loop 4 are integrated in the case 1; bus voltage, PT knife switch 8;
the re-acting relay loop is connected with a tripping and closing operation loop;
the adoption of a fully-sealed metal case; the case adopts a standard aviation plug externally, and is provided with three cable aviation plugs 5 which can be plugged and used; the control circuit respectively corresponds to a reset relay loop, a tripping and closing operation loop and a voltage switching loop;
the re-acting relay loop is connected with the protection device 6 through a cable aviation plug; the tripping and closing operation loop is connected with an external operation mechanism 7 through a cable aviation plug; and the voltage switching loop is connected with the bus voltage and the PT disconnecting link 8 through a cable aviation plug. And the cable aviation plug is connected to the station internal control cubicle.
In some embodiments, as shown in fig. 2, the reset relay loop 2 is composed of a reset loop, a closed loop and a power supply monitoring loop;
wherein, the reactivation circuit include multiunit reactivation function circuit: a reclosing loop, a manual closing loop, a manual tripping loop and a reclosing tripping loop (which are in parallel connection); each group of the re-acting functional circuits is formed by connecting a plurality of re-acting relays K1 in series; the signal sent by the protection device is input into the re-acting circuit, and the re-acting relay is started through the re-acting circuit, so that a plurality of re-acting relay nodes act to achieve the function of signal re-acting;
the post-closing loop is formed by connecting two post-closing electric appliances K2 in series, and the hand jump signal and the hand closing signal sent by the protection device are input into the post-closing loop to start the post-closing electric appliances.
The power supply monitoring loop comprises a power supply indicator lamp L and two normally-open normally-closed relays K3 which are connected in series, the power supply indicator lamp L is connected with a normally-open node of the normally-open normally-closed relay K3 in series, when a direct-current power supply passes through the normally-open normally-closed relays, the normally-open node is closed, the indicator lamp is bright, and the normally-closed node is opened simultaneously, so that the power supply monitoring function is realized.
In some embodiments, as shown in fig. 2, the tripping and closing operation circuit includes a tripping circuit, a closing circuit, a tripping monitoring circuit and a closing monitoring circuit, wherein the tripping circuit and the closing circuit are both formed by a single current type relay K4, and the tripping monitoring circuit and the closing monitoring circuit are formed by connecting one or more position monitoring relays K5 in series;
and the tripping and closing operation loop is connected with a re-acting loop in the re-acting relay loop, and outputs a related action node signal after receiving a signal of the re-acting loop. Further, the action node signal is a node closing signal or a trip signal.
In some embodiments, as shown in FIG. 2, the voltage switching circuits include two sets of voltage switching circuits; each group of voltage switching circuits comprises a double-position relay K6 and a plurality of unit relays K7, wherein the double-position relay and the unit relays are mutually connected in series to form a group of voltage switching circuits; the first group of voltage switching circuits is connected with the first path of bus voltage and the PT disconnecting link, and the second group of voltage switching circuits is connected with the second path of bus voltage and the PT disconnecting link;
and the voltage switching circuit receives two paths of bus voltage input and PT disconnecting link position signals. After the two-way bus voltage is input, the voltage switching loop selectively switches and outputs corresponding voltage according to the position of the PT disconnecting link to supply to the protection device.
The fully-sealed metal case is provided with three cable aviation plugs which are all circular connectors with standard interfaces, and the technical anti-error design of different color bands and fault-tolerant key positions is adopted, so that the 'wrong wiring' on site is effectively prevented; and the terminal adopting a sealing design avoids the 'mistaken touch' on site. The cable aviation plug is related and independent in function and corresponds to a re-acting relay loop, a tripping and closing operation loop and a voltage switching loop respectively.
The case is provided with 1 indicator light for displaying the state of a power supply signal, so that whether the device operation power supply operates normally or not can be displayed visually. The indicating lamp is arranged on the front panel of the fully-sealed metal case and used for monitoring the operation power supply of the device, when the operation power supply is normal, the operation lamp is in a normally-on state (green), and when the operation power supply disappears abnormally, the operation lamp is in a normally-off state.
In practical application, in some embodiments, the in-place operation box is installed on two sides of the outdoor cabinet by using side wall type supports or guide rails, each side can be equally distributed according to two sets, the supports or the guide rails can be arranged with two field-level devices in parallel, and the devices are directly fixed on the supports or the upper and lower edges of the guide rails by using hanging devices or four corners, so that the fixing firmness is improved; the cable protection casing makes the shaping with outdoor cabinet integration, and inside prefabricated cable passed through the sealing member poling to outdoor cabinet, the leakproofness of guarantee outdoor cabinet and the independence in each space. The outdoor cabinet structure adopts a standard outdoor cabinet form and a double-layer structure. The outdoor cabinet and the protective cover are made of stainless steel plates, the appearance is attractive and elegant, the corrosion resistance is good, and the lockset can be arranged outside the outdoor cabinet and the protective cover.
The operation box has definite function partition, and each function partition is independent through different aviation plug input and output according to the function, and interference immunity is strong, and the reliability is high.
As a further improvement, the operation box is arranged beside the primary equipment, and has the characteristics of small occupied area, high protection grade and the like. The installation mode saves cable materials, reduces power loss and improves the action reliability of the operation box.
The utility model discloses a change control box on spot adopts the totally enclosed metal machine case, and electric and mechanical properties are superior, satisfies IP67 barrier propterty requirement, has promoted the stability of device operation under all kinds of severe cold, high temperature, high altitude, high humidity and salt fog environment.
The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.
Claims (10)
1. An on-site operation box for a transformer substation is characterized in that: the switching device comprises a case, wherein a re-acting relay loop, a tripping and closing operation loop and a voltage switching loop are integrated in the case in a partition manner; the re-acting relay loop is connected with a tripping and closing operation loop;
the adoption of a fully-sealed metal case; the case adopts an aviation plug externally, and is provided with three plug-and-play cable aviation plugs which respectively correspond to a re-acting relay loop, a tripping and closing operation loop and a voltage switching loop;
the re-acting relay loop is connected with the protection device through a cable aviation plug;
the tripping and closing operation loop is connected with an external operation mechanism through a cable aviation plug;
and the voltage switching loop is connected with the bus voltage and the PT disconnecting link through a cable aviation plug.
2. The on-site console box for a substation according to claim 1, characterized in that: the re-acting relay loop comprises a re-acting loop and a post-closing loop;
the system comprises a plurality of control circuits, a plurality of control circuits and a plurality of control circuits, wherein the control circuits are connected with the control circuits through the control circuits; the signal sent by the protection device is input into the re-acting circuit, and the re-acting relay is started through the re-acting circuit, so that a plurality of re-acting relay nodes act to achieve the function of signal re-acting;
the post-closing loop is formed by connecting two post-closing electric appliances in series, and the hand jumping signal and the hand closing signal sent by the protection device are input into the post-closing loop to start the post-closing electric appliances.
3. The on-site console box for a substation according to claim 1, characterized in that: the re-activation relay circuit further comprises a power supply monitoring circuit; the power supply monitoring circuit comprises a power supply indicating lamp and two normally-open normally-closed relays which are connected in series, the power supply indicating lamp is connected with a normally-open node of the normally-open normally-closed relay in series, when a direct-current power supply passes through the normally-open normally-closed relay, the normally-open node is closed, the indicating lamp is on, and the normally-closed node is opened simultaneously, so that the power supply monitoring function is realized.
4. The on-site console box for a substation according to claim 2, characterized in that: the said heavy dynamic loop includes the multiple groups of heavy dynamic function loops: reclosing circuit, manual closing circuit, manual tripping circuit and re-tripping circuit.
5. The on-site console box for a substation according to claim 2, characterized in that: the tripping and closing operation circuit comprises a tripping circuit and a closing circuit, and the tripping circuit and the closing circuit are both formed by a single current type relay;
and the tripping and closing operation loop is connected with a re-acting loop in the re-acting relay loop, and outputs a related action node signal after receiving a signal of the re-acting loop.
6. The on-site console box for a substation according to claim 5, characterized in that: the action node signals comprise node closing signals and tripping signals.
7. The on-site console box for a substation according to claim 1, characterized in that: the voltage switching circuit comprises two groups of voltage switching circuits; each group of voltage switching circuits comprises a double-position relay and a plurality of unit relays, wherein the double-position relay and the unit relays are mutually connected in series to form a group of voltage switching circuits; the first group of voltage switching circuits is connected with the first path of bus voltage and the PT disconnecting link, and the second group of voltage switching circuits is connected with the second path of bus voltage and the PT disconnecting link;
the voltage switching circuit receives two paths of bus voltage input and PT disconnecting link position signals, and after the two paths of bus voltage input, corresponding voltage is selected to be switched and output according to the position of the PT disconnecting link.
8. The on-site console box for a substation according to claim 1, characterized in that: the cable aviation plug is a circular connector.
9. The on-site console box for a substation according to claim 3, characterized in that: the power indicator lamp is positioned on the front panel of the case.
10. The on-site console box for a substation according to any one of claims 1 to 9, characterized in that: the on-site operation box is arranged on two sides of the outdoor cabinet by adopting side wall type brackets or guide rails.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020349745.XU CN211579307U (en) | 2020-03-19 | 2020-03-19 | On-site operation box for transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020349745.XU CN211579307U (en) | 2020-03-19 | 2020-03-19 | On-site operation box for transformer substation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211579307U true CN211579307U (en) | 2020-09-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020349745.XU Active CN211579307U (en) | 2020-03-19 | 2020-03-19 | On-site operation box for transformer substation |
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| Country | Link |
|---|---|
| CN (1) | CN211579307U (en) |
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- 2020-03-19 CN CN202020349745.XU patent/CN211579307U/en active Active
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