CN210468801U - Special dual-power non-sensing switching cabinet for bypass live working of 0.4kV branch box - Google Patents
Special dual-power non-sensing switching cabinet for bypass live working of 0.4kV branch box Download PDFInfo
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- CN210468801U CN210468801U CN201921784265.XU CN201921784265U CN210468801U CN 210468801 U CN210468801 U CN 210468801U CN 201921784265 U CN201921784265 U CN 201921784265U CN 210468801 U CN210468801 U CN 210468801U
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- power supply
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- alternating current
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- 230000008447 perception Effects 0.000 claims abstract description 5
- 230000009977 dual effect Effects 0.000 claims abstract description 4
- 238000005070 sampling Methods 0.000 claims description 11
- 230000001360 synchronised effect Effects 0.000 claims description 7
- 230000001939 inductive effect Effects 0.000 claims description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009429 electrical wiring Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Abstract
The utility model discloses a special dual supply noninductive switching cabinet of 0.4kV feeder pillar bypass live working, including the cabinet body, the internal stand-by power supply return circuit that constitutes, rectifier, dc-to-ac converter, contemporary indicator of cabinet for the realization is equipped with the power supply source and is moved side by side with main power supply source in the same phase, and then realizes that important load switches and is equipped with the purpose that power supply source user does not have the perception. The utility model relates to a low pressure distribution equipment field, the beneficial effect that important load does not have a power failure when having switching operation.
Description
Technical Field
The utility model relates to a low pressure distribution equipment field, concretely relates to special dual supply of 0.4kV feeder pillar bypass live working does not have the perception switch cabinet.
Background
When a public power distribution station zone bypass of a power supply company works in a hot-line mode, when a main power supply source and a temporary box transformer substation are switched, electricity needs to be stopped for 2 times in a short time, the action on-off time of an existing load switch or a breaker is longer than 200ms, user experience is poor, the station zone is not the optimal state pursued by hot-line workers, and the station zone stops electricity for 1 time due to faults or power source reversing and the like, so that the situation of frequent power failure complaints of 2 months and 3 times is reached. Through investigation, the existing bypass operation low-voltage quick change-over switch with optimal performance is obtained. When the bypass is put into operation and the bypass is withdrawn, the power of a customer still needs to be cut off for 1 second, the household appliance is shut down, the elevator is shut down, and normal power consumption of the user is influenced.
Therefore, a 0.4kV dual-power supply non-inductive rapid switching complete switch cabinet special for live-line work of a low-voltage bypass of a distribution area is urgently needed to be developed, and the switch cabinet is suitable for automatic switching when a main power supply or a standby power supply in two paths of three-phase four-wire alternating-current 400V/50Hz power supplies are powered off, and is guaranteed. And uninterrupted power supply is realized for the load in the conversion process, namely the power supply switching time of the main power supply and the temporary box transformer substation is 0 second during live working, so that no perception of a user is realized.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the dual-power supply non-sensing switching cabinet special for the bypass live working of the 0.4kV branch box has the advantages that power is not cut off when the main power supply and the standby power supply are switched.
The technical scheme of the technical problem to be solved by the invention is as follows:
0.4kV feeder pillar bypass live working special dual supply does not have perception switch cabinet, including the cabinet body, its characterized in that: a main power supply switch, a standby power supply switch, a rectifier, an inverter, a synchronization indicator, an alternating current sampling latch, an alternating current bus bar and a plurality of feed-out switches hung on the alternating current bus bar are arranged in the cabinet body, the wire inlet end of the main power supply switch is connected with a main power supply to be powered off, and the wire outlet end of the main power supply switch is electrically connected with the alternating current bus bar;
the input end of the standby power supply switch is electrically connected with the standby power supply, the wire outlet end of the standby power supply switch is electrically connected with the input end of the rectifier, the output end of the rectifier is electrically connected with the inverter, and the output end of the inverter is electrically connected with the alternating current bus bar; two signal input ends of the synchronous indicator are respectively and electrically connected with a wire inlet end and a wire outlet end of the main power supply switch, an input end of the alternating current sampling latch is electrically connected with the alternating current bus bar, and an output end of the alternating current sampling latch is electrically connected with the inverter.
Preferably, the rectifier is a three-phase rectifier, and the inverter is a three-phase inverter.
Preferably, wheels are arranged at the bottom of the cabinet body.
Preferably, the power supply switch also comprises a T-shaped connecting wire, one end of the T-shaped connecting wire is provided with a wire clamp, and the other end of the T-shaped connecting wire is electrically connected with the wire inlet ends of the main power supply switch and the standby power supply switch or the wire outlet end of the feed-out switch.
Preferably, a storage battery is connected in series between the rectifier and the inverter.
Preferably, an electric energy meter is arranged at the output end of the inverter.
The beneficial effects of the utility model reside in that:
the method has the beneficial effect that when the main power supply circuit or the breaker equipment needs to be switched to the standby power supply during maintenance, the important load does not stop power.
Drawings
Figure 1 is a diagram of electrical wiring according to one embodiment of the present invention,
figure 2 is a schematic diagram of an embodiment of the present invention,
in the figure:
LAT, AC sampling latch; SYN, synchronization indicator; QFC, feed-out switch; INV, an inverter; REC, rectifier; QFB, standby power switch; QFZ, main power supply switch;
Detailed Description
In order to make the technical solution and the beneficial effects of the present invention clearer, the following is a further detailed explanation of the embodiments of the present invention.
As shown in fig. 1, the dual-power-supply non-sensing switching cabinet special for bypass live working of the 0.4kV branch box comprises a cabinet body. The cabinet body is a conventional power distribution cabinet body for an electrical power distribution cabinet. The cabinet body is internally provided with a main power supply switch QFZ, a standby power supply switch QFB, a rectifier REC, an inverter INV, a synchronous indicator SYN, an alternating current sampling latch LAT, an alternating current bus bar and a plurality of feed-out switches QFC which are hung on the alternating current bus bar.
The main power supply switch QFZ and the standby power supply switch QFB are used for connecting the main power supply and the standby power supply. The rectifier REC is used to convert alternating current into direct current. The inverter INV is used to convert dc power to ac power. In the prior art, the main power supply and the standby power supply only have a switching module, but the power supply feed-out loop cannot be guaranteed to be uninterrupted in the process of switching the main power supply and the standby power supply. The utility model relates to an use inverter INV output one with the synchronous power signal of main power supply source, realize the side by side operation of activestandby power supply, and then realize reaching the purpose that does not have a power failure at the in-process of switching load.
The incoming line end of the main power switch QFZ is connected to the main power source to be powered off, and the outgoing line end of the main power switch QFZ is electrically connected to the ac bus bar. The input end of the standby power supply switch QFB is electrically connected with the standby power supply, and the outlet end of the standby power supply switch QFB is electrically connected with the input end of the rectifier REC. The output end of the rectifier REC is electrically connected with the input end of the inverter INV, and the output end of the inverter INV is electrically connected with the alternating current bus bar. At this time, the AC bus bar is provided with two paths of power supplies.
The rectifier is a device for converting alternating current into direct current, a rectifying circuit is arranged in the rectifier, and the rectifying circuit commonly used in the prior art comprises a half-wave rectifying circuit, a full-wave rectifying circuit and a bridge rectifying circuit. The inverter is a converter which converts a direct current electric energy battery and an accumulator jar into constant-frequency constant-voltage or frequency-modulation voltage-regulation alternating current which is generally a 220V and 50Hz sine wave. It is composed of inverter bridge, control logic and filter circuit. Since the phase voltage frequency and the like output by the inverter need to be adjusted according to the main power supply in the present embodiment, the inverter used in the present embodiment is a tunable inverter. Preferably, it is three-phase electricity to be common in the distribution field, consequently the utility model discloses well rectifier REC is three-phase rectifier, and inverter INV is three-phase inverter.
Two power supplies which are operated in parallel must be kept synchronous. The two signal inputs of the synchronization indicator SYN are therefore electrically connected to the incoming and outgoing terminals, respectively, of the main power switch QFZ. The synchronization indicator SYN is a device for indicating whether two power supply signals are synchronized, such as a common synchronization table, which is mostly a digital synchronization table. The synchronization indicator is used for detecting whether synchronization exists or not and providing basis for adjustment of the inverter.
Since a change in load causes a real-time weak change in frequency voltage or the like, an ac sampling latch LAT is provided to realize a stable output of the inverter. The input end of the AC sampling latch LAT is electrically connected with the AC bus bar, and the output end of the AC sampling latch LAT is electrically connected with the inverter INV.
The utility model discloses can install for important load power supply as activestandby power supply switch cabinet. The power distribution cabinet can also be used as a temporary power distribution cabinet, and the switching of a main power supply and a standby power supply is realized when a main loop is overhauled or maintained. At this time, in order to facilitate the movement of the cabinet, wheels are provided at the bottom of the cabinet.
Become similarly with interim case, the utility model relates to an interim switch board when using, needs to be connected with current distribution device. Thus, T-connection of the electrical lines is facilitated. The utility model discloses still include T and connect the wire. One end of the T-shaped connecting wire is provided with a wire clamp, and the other end of the T-shaped connecting wire is electrically connected with the wire inlet ends of the main power supply switch QFZ and the standby power supply switch QFB or the wire outlet end of the feed-out switch QFC. When the power distribution station or the transformer area which needs to be transformed is operated, the T-shaped connecting wire is directly clamped on the wire of the power supply line or the connecting terminal, so that the beneficial effects of rapidness and convenience are achieved, the working efficiency is improved, and the power failure time is shortened.
Preferably, in order to increase the stability of system operation and improve the quality of power supply service, a storage battery is connected in series between the rectifier REC and the inverter INV, so that the storage battery can ensure the stable input of the inverter power supply under the condition that the standby power supply is unstable.
When the standby power supply is used for supplying power, the power supply can be temporarily supplied by the box transformer, so that the problem of cost intersection is caused. The method is used for measuring the electricity consumption of the important load under the condition of supplying power by the standby power supply.
Fig. 2 shows an example of the application of the present invention. Transformer T1 is the main supply transformer and transformer TL is the temporary transformer. The L1 bus is important load under the main transformer that supplies, the utility model discloses the upper end T of the switch of the power supply circuit of main power switch QFZ and L1 bus connects, and the loop connection that presents that supply power switch and interim case become. The utility model discloses a present the lower extreme of switch QFC and the lower extreme T who presents the switch of L1 generating line and connect. When the switching-off, the utility model provides an all other switches outside the reserve power supply switch are off state, then according to the instruction of indicator in the same period, and the output of adjustment dc-to-ac converter is the utility model discloses power signal on the alternating current generating line row is synchronous with main power supply source, carries out afterwards the utility model discloses the combined floodgate of internal switch with treat the separating brake operation in power failure return circuit. The switch of the original loop is switched off in the parallel running state, so that the outage of important loads and the noninductivity of users are ensured.
In summary, the present invention is only a preferred embodiment, and not intended to limit the scope of the present invention, and various changes and modifications can be made by workers in the light of the above description without departing from the technical spirit of the present invention. The technical scope of the present invention is not limited to the content of the specification, and all the equivalent changes and modifications of the shape, structure, characteristics and spirit according to the scope of the present invention should be included in the scope of the claims of the present invention.
Claims (6)
1.0.4kV feeder pillar bypass live working special dual supply does not have perception switch cabinet, including the cabinet body, its characterized in that:
the cabinet body is internally provided with a main power supply switch (QFZ), a standby power supply switch (QFB), a Rectifier (REC), an Inverter (INV), a synchronization indicator (SYN), an alternating current sampling Latch (LAT), an alternating current bus bar and a plurality of feed-out switches (QFC) hung on the alternating current bus bar,
the incoming line end of the main power supply switch (QFZ) is connected with a main power supply to be powered off, and the outgoing line end of the main power supply switch (QFZ) is electrically connected with the alternating current bus bar;
the input end of the standby power supply switch (QFB) is electrically connected with a standby power supply, the wire outlet end of the standby power supply switch (QFB) is electrically connected with the input end of the Rectifier (REC), the output end of the Rectifier (REC) is electrically connected with the Inverter (INV), and the output end of the Inverter (INV) is electrically connected with the alternating current bus bar;
two signal input ends of the synchronous indicator (SYN) are respectively and electrically connected with an incoming line end and an outgoing line end of a main power supply switch (QFZ), an input end of an alternating current sampling Latch (LAT) is electrically connected with an alternating current bus bar, and an output end of the alternating current sampling Latch (LAT) is electrically connected with an Inverter (INV).
2. The dual-power supply non-inductive switching cabinet special for bypass live working of the 0.4kV branch box of claim 1, which is characterized in that:
the Rectifier (REC) is a three-phase rectifier, and the Inverter (INV) is a three-phase inverter.
3. The dual-power supply non-inductive switching cabinet special for bypass live working of the 0.4kV branch box of claim 1, which is characterized in that:
wheels are arranged at the bottom of the cabinet body.
4. The dual-power supply non-inductive switching cabinet special for bypass live working of the 0.4kV branch box of claim 1, which is characterized in that:
the power supply system also comprises a T-connection lead, wherein one end of the T-connection lead is provided with a wire clamp, and the other end of the T-connection lead is electrically connected with the wire inlet ends of the main power supply switch (QFZ) and the standby power supply switch (QFB) or the wire outlet end of the feed-out switch (QFC).
5. The dual-power supply non-inductive switching cabinet special for bypass live working of the 0.4kV branch box of claim 1, which is characterized in that:
and a storage battery is connected in series between the Rectifier (REC) and the Inverter (INV).
6. The dual-power supply non-inductive switching cabinet special for bypass live working of the 0.4kV branch box of claim 1, which is characterized in that:
and an electric energy meter is arranged at the output end of the Inverter (INV).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921784265.XU CN210468801U (en) | 2019-10-23 | 2019-10-23 | Special dual-power non-sensing switching cabinet for bypass live working of 0.4kV branch box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921784265.XU CN210468801U (en) | 2019-10-23 | 2019-10-23 | Special dual-power non-sensing switching cabinet for bypass live working of 0.4kV branch box |
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| Publication Number | Publication Date |
|---|---|
| CN210468801U true CN210468801U (en) | 2020-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921784265.XU Expired - Fee Related CN210468801U (en) | 2019-10-23 | 2019-10-23 | Special dual-power non-sensing switching cabinet for bypass live working of 0.4kV branch box |
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| CN (1) | CN210468801U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111711194A (en) * | 2020-07-20 | 2020-09-25 | 西南石油大学 | Power supply guarantee device based on bypass operation integration |
| CN112152202A (en) * | 2020-08-26 | 2020-12-29 | 北京国电龙源环保工程有限公司 | Electrical wiring system of wet desulphurization power supply section |
| US11888294B2 (en) | 2021-03-10 | 2024-01-30 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Power distribution device, power distribution trailer, electric drive system and operation method thereof |
-
2019
- 2019-10-23 CN CN201921784265.XU patent/CN210468801U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111711194A (en) * | 2020-07-20 | 2020-09-25 | 西南石油大学 | Power supply guarantee device based on bypass operation integration |
| CN111711194B (en) * | 2020-07-20 | 2023-09-12 | 西南石油大学 | Power supply guarantee device based on bypass operation integration |
| CN112152202A (en) * | 2020-08-26 | 2020-12-29 | 北京国电龙源环保工程有限公司 | Electrical wiring system of wet desulphurization power supply section |
| US11888294B2 (en) | 2021-03-10 | 2024-01-30 | Yantai Jereh Petroleum Equipment & Technologies Co., Ltd. | Power distribution device, power distribution trailer, electric drive system and operation method thereof |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200505 Termination date: 20201023 |
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| CF01 | Termination of patent right due to non-payment of annual fee |