CN209982038U - Intelligent switching system for important power supply - Google Patents
Intelligent switching system for important power supply Download PDFInfo
- Publication number
- CN209982038U CN209982038U CN201920226354.6U CN201920226354U CN209982038U CN 209982038 U CN209982038 U CN 209982038U CN 201920226354 U CN201920226354 U CN 201920226354U CN 209982038 U CN209982038 U CN 209982038U
- Authority
- CN
- China
- Prior art keywords
- direct current
- air cooling
- power supply
- strong oil
- current system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Protection Of Transformers (AREA)
Abstract
The utility model relates to an important power intelligence switching system belongs to power control technical field, including direct current system, the protection circuit, I is female and II is female, direct current system includes main strong oil circulation air cooling system and communication system, II is female with I female connection, direct current system inserts I is female, be provided with air switch one on the main strong oil circulation air cooling system and the female connecting wire between I, be provided with air switch two on the connecting wire between communication system and the I is female, it has alternating current relay and current relay all to establish ties in main strong oil circulation air cooling system and communication system's the control circuit, the protection circuit sets up in direct current system, the utility model discloses use intelligent remote control technique, reliable closed loop improves current power supply system, makes the important load safety intelligence power supply of 220kV and above transformer substation possible.
Description
Technical Field
The utility model relates to an important power intelligence switching system belongs to power control technical field.
Background
The power supply system for the substation is the most important working power supply of the substation, is the basis for stabilizing the reliable work of the power supply equipment of the low-voltage power supply system of the substation, and is directly related to the safe and stable operation of all equipment of the substation if the operation condition is normal or not. Once a power supply system for a substation has a problem, the safe and reliable operation of power supply of an alternating current secondary and a direct current system of a transformer substation is directly or indirectly influenced, and the accident range can be enlarged in severe cases, the operation effect of the power supply system is directly related to the reliability and stability of power supply of a 380V low-voltage system of the transformer substation, namely a main transformer strong oil circulating air cooling system, a communication system, a direct current system, a remote watching system and a safe lighting system, the ATS switch technology is widely used and operated by the current low-voltage power supply system of the transformer substation, I, II V bus 380 controlled by the ATS supplies power for an important power supply of the transformer substation, and important loads connected with the 380V bus, such as load switches used by the main transformer strong oil circulating air cooling system, the communication system, the direct current system, the remote watching system;
this will result in that, in the main transformer strong oil circulation air cooling system, when the main transformer temperature is too high and the strong oil circulation and air cooling power supply need to be started, time delay will be caused because no one has to manually switch the main transformer strong oil air cooling power supply switch on site, when the main transformer cooler full stop time reaches 1 hour, the main transformer protection will forcibly trip off the main transformer three-side circuit breaker, causing the serious accident of total station voltage loss large area power failure. The unattended transformer substation is particularly so that in a direct-current system, when a power supply cannot be timely provided for the direct-current system, a charger stops running, a storage battery pack does not have the charger to float and charge the storage battery pack for a long time, the voltage of the storage battery pack is continuously reduced due to direct-current load, if the storage battery pack is not timely processed, total-station direct-current power loss is caused, and the serious consequence that primary equipment is not damaged due to protection accidents can be caused.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem who solves overcomes current defect, provides an important power intelligence switching system, can effectively solve the problem of mentioning in the background art.
In order to solve the technical problem, the utility model provides a following technical scheme:
an important power supply intelligent switching system comprises a direct current system, a protection circuit, a I bus and a II bus, wherein the direct current system comprises a main strong oil circulating air cooling system and a communication system, the II bus is connected with the I bus, the direct current system is connected to the I bus, a first air switch is arranged on a connecting line between the main strong oil circulating air cooling system and the I bus, a second air switch is arranged on a connecting line between the communication system and the I bus, and an alternating current relay and a current relay are connected in series in control circuits of the main strong oil circulating air cooling system and the communication system;
the protection circuit is arranged in the direct current system and comprises a controller, a signal synthesis module, a direct current system blocking sub-signal generation module, a main strong oil circulation air cooling system blocking sub-signal generation module and a communication system sub-signal generation module, wherein the direct current system blocking sub-signal generation module, the main strong oil circulation air cooling system blocking sub-signal generation module and the communication system sub-signal generation module are all connected with the signal synthesis module, the signal synthesis module is connected with the controller, and the controller is connected with an electric brake.
Further, the dc system blocking sub-signal generating module includes a dc system fault detecting unit and a dc system logical operation unit, and the dc system charger, the dc system module, the dc system ac, the dc system feeder, the dc system charger output switch, the dc system bus, and the dc system monitor are connected to the dc system fault detecting unit at the same time.
Furthermore, the main transformer strong oil circulating air cooling system locking sub-signal generation module is composed of a main transformer strong oil circulating air cooling system fault detection unit and a main transformer strong oil circulating air cooling system logic operation unit, and a main transformer PLC, a main transformer cooler working power supply, a main transformer cooler operating power supply and a main transformer cooler motor are all connected with the main transformer strong oil circulating air cooling system fault detection unit.
Furthermore, the communication system sub-signal generation module is composed of a communication system fault detection unit and a communication system logic operation unit, and a communication power supply, a communication power supply rectifier, a communication power supply alternating current and a communication power supply battery are all connected with the same-preference system fault detection unit.
The utility model discloses beneficial effect:
the utility model discloses get two auxiliary node as air switch's position to designed control circuit and come to carry out remote control to air switch, alternating current relay, the current relay that control circuit cluster goes into are as overload protection, the short-circuit protection of this switch, and simultaneously, it is right to have set up dedicated protection circuit the utility model discloses protect, security and intelligent degree are all higher, and are more stable.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a circuit connection diagram of the present invention.
Fig. 2 is a circuit diagram of the protection circuit of the present invention.
Reference numbers in the figures: 1-direct current system, 2-main transformer strong oil circulation air cooling system and 3-communication system.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
As shown in fig. 1 to 2, an important power supply intelligent switching system comprises a direct current system 1, a protection circuit, a bus I and a bus II, wherein the direct current system 1 comprises a main strong oil circulation air cooling system 2 and a communication system 3, the bus II is connected with the bus I, the direct current system 1 is connected with the bus I, a first air switch is arranged on a connecting line between the main strong oil circulation air cooling system 2 and the bus I, a second air switch is arranged on a connecting line between the communication system 3 and the bus I, an alternating current relay and a current relay are connected in series in control circuits of the main strong oil circulation air cooling system 2 and the communication system 3, when the control circuits receive a switching-on command, the alternating current relay is electrified, a normally open node is closed, a driving motor can switch on the first air switch and the second air switch, and when the current rises to a setting value or is greater than the setting value after the first air switch and the second air switch are switched on, the current relay acts, the make contact is closed, and the break contact is opened. When the current is reduced to 0.8 times of the setting value, the current relay returns, the movable contact is opened, and the movable contact is closed, so that the control of the circuit is completed;
the protection circuit is arranged in the direct current system 1 and comprises a controller, a signal synthesis module, a direct current system blocking sub-signal generation module, a main strong oil circulating air cooling system blocking sub-signal generation module and a communication system sub-signal generation module, wherein the direct current system blocking sub-signal generation module, the main strong oil circulating air cooling system blocking sub-signal generation module and the communication system sub-signal generation module are all connected with the signal synthesis module, the signal synthesis module is connected with the controller, and the controller is connected with the electric brake.
The direct current system locking sub-signal generating module comprises a direct current system fault detecting unit and a direct current system logic operation unit, and the direct current system charger, the direct current system module, the direct current system alternating current, the direct current system feeder line, the direct current system charger output switch, the direct current system combined bus and the direct current system monitor are simultaneously connected with the direct current system fault detecting unit.
The main transformer strong oil circulating air cooling system locking sub-signal generation module is composed of a main transformer strong oil circulating air cooling system fault detection unit and a main transformer strong oil circulating air cooling system logic operation unit, and a main transformer PLC, a main transformer cooler working power supply, a main transformer cooler operating power supply and a main transformer cooler motor are all connected with the main transformer strong oil circulating air cooling system fault detection unit.
The communication system sub-signal generation module consists of a communication system fault detection unit and a communication system logic operation unit, and a communication power supply, a communication power supply rectifier, a communication power supply alternating current and a communication power supply battery are all connected with the same-preference system fault detection unit
And the signals are divided by adopting an or logic, that is, when any one of the components connected with the direct current system fault detection unit, the main strong oil circulation air cooling system fault detection unit and the communication system fault detection unit is detected to have a fault, the controller can send a command of forbidding switching on to the switch so as to achieve the purpose of protection. In order to ensure that the switch is switched on and a fault loop can be quickly cut off, a protective relay is required to be introduced, an alternating current relay and a thermal current relay are connected in series in a control loop to be used as closed quick tripping protection, when the alternating current relay detects voltage abnormity, a normally closed contact is used for cutting off the loop, the thermal current relay detects overload, current is increased, and the thermal sensitivity is used for timely cutting off the loop.
The above is the preferred embodiment of the present invention, and the technical personnel in the field of the present invention can also change and modify the above embodiment, therefore, the present invention is not limited to the above specific embodiment, and any obvious improvement, replacement or modification made by the technical personnel in the field on the basis of the present invention all belong to the protection scope of the present invention.
Claims (4)
1. The utility model provides an important power intelligence switching system, includes direct current system (1), protection circuit, I mother and II mother, its characterized in that: the direct current system (1) comprises a main strong oil circulating air cooling system (2) and a communication system (3), a second bus is connected with the first bus, the direct current system (1) is connected with the first bus, an air switch I is arranged on a connecting line between the main strong oil circulating air cooling system (2) and the first bus, an air switch II is arranged on a connecting line between the communication system (3) and the first bus, and an alternating current relay and a current relay are connected in control loops of the main strong oil circulating air cooling system (2) and the communication system (3) in series;
the protection circuit is arranged in the direct current system (1), and comprises a controller, a signal synthesis module, a direct current system blocking sub-signal generation module, a main strong oil circulating air cooling system blocking sub-signal generation module and a communication system sub-signal generation module, wherein the direct current system blocking sub-signal generation module, the main strong oil circulating air cooling system blocking sub-signal generation module and the communication system sub-signal generation module are all connected with the signal synthesis module, the signal synthesis module is connected with the controller, and the controller is connected with an electric brake.
2. The intelligent switching system for important power supplies according to claim 1, wherein: the direct current system locking sub-signal generating module comprises a direct current system fault detecting unit and a direct current system logic operation unit, and the direct current system charger, the direct current system module, the direct current system alternating current, the direct current system feeder line, the direct current system charger output switch, the direct current system combined bus and the direct current system monitor are simultaneously connected with the direct current system fault detecting unit.
3. The intelligent switching system for important power supplies according to claim 1, wherein: the main transformer strong oil circulating air cooling system locking sub-signal generation module is composed of a main transformer strong oil circulating air cooling system fault detection unit and a main transformer strong oil circulating air cooling system logic operation unit, and a main transformer PLC, a main transformer cooler working power supply, a main transformer cooler operating power supply and a main transformer cooler motor are all connected with the main transformer strong oil circulating air cooling system fault detection unit.
4. The intelligent switching system for important power supplies according to claim 1, wherein: the communication system sub-signal generation module is composed of a communication system fault detection unit and a communication system logic operation unit, and a communication power supply, a communication power supply rectifier, a communication power supply alternating current and a communication power supply battery are all connected with the communication system fault detection unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920226354.6U CN209982038U (en) | 2019-02-23 | 2019-02-23 | Intelligent switching system for important power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920226354.6U CN209982038U (en) | 2019-02-23 | 2019-02-23 | Intelligent switching system for important power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209982038U true CN209982038U (en) | 2020-01-21 |
Family
ID=69253217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920226354.6U Expired - Fee Related CN209982038U (en) | 2019-02-23 | 2019-02-23 | Intelligent switching system for important power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209982038U (en) |
-
2019
- 2019-02-23 CN CN201920226354.6U patent/CN209982038U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110912114A (en) | High-safety low-voltage direct current system | |
| CN211556956U (en) | High-reliability direct-current power supply for transformer substation | |
| CN106451749B (en) | Emergency protection device and protection method for traction substation control protection system under abnormal working condition | |
| CN211127567U (en) | Fault protection circuit of high-power high-frequency oxidation power supply | |
| CN209982038U (en) | Intelligent switching system for important power supply | |
| CN203553903U (en) | Power motor protection device | |
| CN203071647U (en) | Low-voltage switch cabinet automatic input and recovery device | |
| CN201130821Y (en) | Intelligent control apparatus for energy consumption system | |
| CN204304453U (en) | A kind of interlock protection structure of water-cooling type SVG equipment | |
| CN113452153A (en) | Online energy-taking and power-supplying system for ground wire of overhead transmission line | |
| RU104390U1 (en) | DC SHIELD (OPTIONS) | |
| CN206542181U (en) | Intelligent non-pressure release coil controller | |
| CN207926166U (en) | A kind of blocking device preventing accidentally combination switch | |
| CN211151525U (en) | Digital anti-islanding protection device | |
| CN218783579U (en) | Intelligent bus coupler of low-voltage direct-current power supply for station | |
| CN104917171A (en) | Intelligent distributed self-healing control method based on fault at 0.4kV side in distribution substation | |
| CN203301218U (en) | Device used for gas turbine power plant circulating water MCC power source switching | |
| CN109193913A (en) | A kind of energy-storage battery based on thermal power plant's AGC frequency modulation makees the spare system of station service | |
| CN218386942U (en) | Control system of high-frequency power supply cabinet | |
| CN210350859U (en) | Alarm device for monitoring circuit breaker | |
| CN216356534U (en) | Circuit for preventing tripping of low-voltage frequency converter by using standby power supply | |
| CN213279140U (en) | Circuit of direct current de-excitation switch combined tripping generator outlet circuit breaker | |
| CN203026971U (en) | Storage battery monitoring system power loss prevention device | |
| CN220822618U (en) | Leakage protection system of diesel generator set | |
| CN220358875U (en) | Direct-current power supply system bus-tie intelligent switching device with double charging and double storage functions for power transformer substation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200121 Termination date: 20210223 |