CN221202220U - Dual-power circuit of feeder monitoring terminal - Google Patents
Dual-power circuit of feeder monitoring terminal Download PDFInfo
- Publication number
- CN221202220U CN221202220U CN202322595597.6U CN202322595597U CN221202220U CN 221202220 U CN221202220 U CN 221202220U CN 202322595597 U CN202322595597 U CN 202322595597U CN 221202220 U CN221202220 U CN 221202220U
- Authority
- CN
- China
- Prior art keywords
- power supply
- feeder
- monitoring terminal
- supply
- terminal
- 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.)
- Active
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 42
- 230000009977 dual effect Effects 0.000 claims description 15
- 239000003990 capacitor Substances 0.000 claims description 12
- 238000004804 winding Methods 0.000 claims description 2
- 230000002159 abnormal effect Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Stand-By Power Supply Arrangements (AREA)
Abstract
The utility model discloses a double-power-supply circuit of a feeder line monitoring terminal, which comprises the feeder line monitoring terminal, a zero line, a live line, a main power supply, a double-power-supply relay and a standby direct-current power supply, wherein the feeder line monitoring terminal is connected to the main power supply through the zero line and the live line, the live line is provided with the double-power-supply relay, the double-power-supply relay is integrated with a control terminal, the control terminal is connected to the main power supply in parallel, the double-power-supply relay is connected with a positive electrode line of the standby direct-current power supply, and a negative electrode line of the standby direct-current power supply is connected with the feeder line monitoring terminal. Through the mode, the utility model provides the dual-power circuit of the feeder monitoring terminal, and by adding a set of standby power supply, the feeder terminal can still work normally when the feeder circuit fails, the standby power supply and the main power supply can realize seamless switching, and the power supply of the terminal is not affected when the line is abnormal.
Description
Technical Field
The utility model relates to the field of switching power supplies, in particular to a dual-power circuit of a feeder monitoring terminal.
Background
The feeder line state monitoring automation mainly has the effects that under normal conditions, the state of a switch on a column and the power parameters of a feeder line are remotely monitored, and the feeder line operation mode is optimized, so that the switching operation of a remote control switch is realized; after detecting that the feeder line breaks down, the power supply of the fault area can be intelligently identified and cut off, the power supply of the fault-free area can be quickly recovered, fault information can be generated and reported to a monitoring center in real time, and the stability and reliability of the power supply are improved.
The existing feeder line monitoring terminal only has one set of power supply, and when the feeder line is abnormal, the feeder line terminal stops working, and the monitoring system stops working. Moreover, the anti-interference capability of the terminal is obviously insufficient. In addition, due to circuit design problems, transient voltage spikes can cause damage to subsequent circuits. Therefore, these defects result in insufficient stability, safety and reliability of the monitoring system, and the industrial application requirements cannot be met temporarily.
Disclosure of utility model
The utility model mainly solves the technical problem of providing a double-power-supply circuit of a feeder line monitoring terminal, which ensures that the feeder line terminal can still work normally when a feeder line fails by adding a set of standby power supply, the standby power supply and a main power supply can realize seamless switching, and the power supply of the terminal is not affected when the line is abnormal.
In order to solve the technical problems, the utility model adopts a technical scheme that: the utility model provides a dual supply circuit of feeder monitoring terminal, including feeder monitoring terminal, zero line, live wire, main power supply, dual supply relay, reserve DC power supply, feeder monitoring terminal is connected to main power supply through zero line, live wire, be provided with dual supply relay on the live wire, dual supply relay integration has control terminal, control terminal connects in parallel on main power supply, dual supply relay links to each other with the anodal circuit of a reserve DC power supply in addition, reserve DC power supply's negative pole circuit meets with feeder monitoring terminal.
In a preferred embodiment of the utility model, the main power supply is provided with a pre-protection circuit, the pre-protection circuit is connected with a power type thermistor in series on a live wire, the pre-protection circuit is connected with a piezoresistor in parallel, the pre-protection circuit is wound with a common-mode inductor, and the front stage and the rear stage of the common-mode inductor are connected with a plurality of ampere-scale capacitors in parallel.
In a preferred embodiment of the present utility model, a rectifier is disposed on the positive line, and one or more capacitors are connected in parallel between the standby dc power supply and the feeder monitoring terminal.
In a preferred embodiment of the present utility model, the feeder monitoring terminal is grounded.
The beneficial effects of the utility model are as follows: according to the dual-power circuit of the feeder monitoring terminal, provided by the utility model, by adding one set of standby power supply, the feeder terminal can still work normally when a feeder circuit fails, the standby power supply and the main power supply can be switched seamlessly, and the power supply of the terminal is not affected when the circuit is abnormal.
Drawings
For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:
FIG. 1 is a block diagram of a pre-protection circuit for a dual power circuit of a feeder monitoring terminal of the present utility model;
Fig. 2 is a circuit configuration diagram of a standby dc power supply of a dual power supply circuit of a feeder line monitoring terminal according to the present utility model.
Detailed Description
The following description of the technical solutions in the embodiments of the present utility model will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1-2, an embodiment of the present utility model includes:
The utility model provides a dual supply circuit of feeder monitoring terminal, includes feeder monitoring terminal, zero line (AC (N)), live wire (AC (L)), main power supply, dual supply relay (HF 13F), reserve DC power supply (battery+) (Battery-) the feeder monitoring terminal is connected to main power supply through zero line (AC (N)), live wire (AC (L)), be provided with dual supply relay (HF 13F) on the live wire (AC (L)), dual supply relay (HF 13F) is integrated with control terminal, control terminal connects in parallel on main power supply, dual supply relay (HF 13F) is in addition connected with the positive circuit of a reserve DC power supply (battery+) (Battery-) and the negative circuit of reserve DC power supply (Battery-) meets with feeder monitoring terminal.
The feeder line monitoring terminal supplies power by the dual-power circuit of the feeder line monitoring terminal. Under the normal condition of the system, a 10kV feeder line is converted into 220V alternating current through PT, and then the 220V alternating current is converted into terminal power through AC/DC conversion to be used as a main power supply of a feeder line monitoring terminal. Meanwhile, the unexpected conditions such as the abnormity of the feed line are considered, the standby power supply is adopted to supply power to the system, the seamless switching between the main power supply and the standby power supply is designed, and the power supply of the terminal is not affected when the line is abnormal.
Specifically, in this embodiment, the AC/DC module of the main power supply will choose at least 150W taking into account the power of the terminal and pole-mounted switch operating motors.
The design adopts an NA150-220S24 L1 isolation power module for realizing 220V AC-24 VDC conversion, and adopts a 15W WD15-24S05C1 module for realizing 24 VDC-5 VDC conversion, and the AC/DC and DC/DC isolation modules are adopted, so that the interference of the power supply introduced into the feeder monitoring terminal is reduced, and the anti-interference performance of the whole feeder monitoring terminal is improved.
In order to prevent the damage to terminal equipment caused by surge voltage and current generated by lightning strike, a protection circuit is added in front of an AC/DC module:
The main power supply is provided with a front-end protection circuit, the front-end protection circuit is connected with a power type thermistor (R1) in series on a live wire (AC (L)), the front-end protection circuit is connected with a piezoresistor (R2) in parallel, the front-end protection circuit is connected with a common-mode inductor (LCM 1) in a winding manner, and a plurality of safety capacitors (CY1\CY2\CX1\CX2\CY3\CY4) are connected in parallel at the front stage and the rear stage of the common-mode inductor (LCM 1).
The power type thermistor (R1) plays a role in inhibiting surge current; in addition, the NTC 5D-15 is selected as the power type thermistor (R1), the resistance value of the power type thermistor can be smaller along with the action of current, and the consumed power is reduced along with the current and can be even ignored.
The piezoresistor (R2) selects MOV 20D471K, so that the damage of a subsequent circuit caused by instantaneous voltage abrupt change can be prevented; meanwhile, when high voltage acts on two ends of the piezoresistor (R2), the resistance value of the piezoresistor is rapidly reduced, a shunt effect is achieved on a circuit, and other components of the module are protected from being influenced.
The common mode inductor (LCM 1) is used for filtering high-frequency common mode noise on a line, and does not influence other devices because electromagnetic interference characteristics are not generated. The common mode choke coil can transmit a differential mode signal and suppress high-frequency common mode noise.
The safety capacitor (CY1\CY2\CX1\CX2\CY3\CY4) is designed in a front-end protection circuit of the main power supply, so that the power supply filtering effect can be achieved.
Further, a rectifier D2 is disposed on the positive electrode line, and one or more capacitors (c1\c2) are connected in parallel between the standby dc power supply (battery+) (Battery-) and the feeder monitoring terminal.
The design realizes seamless switching of the standby power supply and the main power supply through the capacitor (C1\C2) of the energy storage element, and after the main power supply is powered down, the capacitor (C1\C2) needs to undergo a discharging process, and the relay is automatically switched in the discharging process to control the standby power supply to start supplying power. The dual power connection circuit is shown in fig. 2. The HF_IN17 and the HF_IN28 are respectively connected to the input end of the main power supply, when the main power supply supplies power, the relay is IN an off state, and the standby power supply cannot supply power for the system; when the main power supply is powered down, the capacitor (C1\C2) starts to discharge, and in the discharging time of the capacitor (C1\C2), the relay is automatically switched to a normally-closed state, and the standby power supply starts to supply power to the system.
In addition, the backup direct current power supply (battery+) (Battery-) uses two 12VDC rechargeable lead batteries in series to provide a 24VDC voltage. The battery is charged through solar energy, the solar panel charges the lead battery through the MPPT controller, and the MPPT monitors the charging voltage and current of the battery panel in real time, so that the solar panel is ensured to charge the lead battery with the optimal output power. Meanwhile, MPPT achieves the purpose of controlling stable output of the battery, and coordinates the work of the solar photovoltaic panel, the storage battery and the load.
Further, the feeder monitoring terminal is grounded.
In summary, the product has the following beneficial effects:
1. A set of standby power supply is added for the feeder terminal, and when the feeder circuit is abnormal, the feeder terminal can work normally. I.e. the feeder line supplies power to the feeder terminal, which is converted from 10k to 220 to a DC24 input terminal as the main power supply; when the feed line is abnormal, the power supply can be switched to the standby power supply 24V battery for supplying power.
2. The main power supply and the standby power supply can realize seamless switching, and the power supply of the feeder terminal is not affected when the line is abnormal.
3. And by adopting the AC/DC and DC/DC isolation modules, the interference introduced by a power supply is reduced, and the anti-interference performance of the whole terminal is improved.
4. A piezoresistor (R2) MOV 20D471 is connected in parallel in the power supply front-end protection circuit to prevent damage to subsequent circuits caused by transient voltage abrupt change.
5. A safety capacitor (C1\C2) (CY1\CY2\CX1\CX2\CY3\CY4) is added into the power supply front-end circuit to achieve the power supply filtering effect; the common mode choke coil can transmit a differential mode signal and suppress high-frequency common mode noise.
In summary, the utility model provides a dual-power circuit of a feeder line monitoring terminal, which is characterized in that a set of standby power supply is added, so that the feeder line terminal can still work normally when a feeder line fails, the standby power supply and a main power supply can realize seamless switching, and the power supply of the terminal is not affected when the line is abnormal.
The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related arts are included in the scope of the present utility model.
Claims (3)
1. The double-power-supply circuit of the feeder line monitoring terminal is characterized by comprising the feeder line monitoring terminal, a zero line, a fire wire, a main power supply, a double-power-supply relay and a standby direct-current power supply, wherein the feeder line monitoring terminal is connected to the main power supply through the zero line and the fire wire, the fire wire is provided with the double-power-supply relay, the double-power-supply relay is integrated with a control terminal, the control terminal is connected to the main power supply in parallel, the double-power-supply relay is connected with a positive electrode line of the standby direct-current power supply, and a negative electrode line of the standby direct-current power supply is connected with the feeder line monitoring terminal;
The main power supply is provided with a front-end protection circuit, the front-end protection circuit is connected with a power type thermistor in series on a live wire, the front-end protection circuit is connected with a piezoresistor in parallel, a common-mode inductor is connected to the front-end protection circuit in a winding mode, and a plurality of safety capacitors are connected in parallel at the front-end and rear-end stages of the common-mode inductor.
2. The dual power supply circuit of a feeder line monitoring terminal according to claim 1, wherein a rectifier is arranged on the positive electrode line, and one or more capacitors are connected in parallel between the standby direct current power supply and the feeder line monitoring terminal.
3. The dual power circuit of a feeder monitoring terminal of claim 1, wherein the feeder monitoring terminal is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322595597.6U CN221202220U (en) | 2023-09-25 | 2023-09-25 | Dual-power circuit of feeder monitoring terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322595597.6U CN221202220U (en) | 2023-09-25 | 2023-09-25 | Dual-power circuit of feeder monitoring terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221202220U true CN221202220U (en) | 2024-06-21 |
Family
ID=91519828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322595597.6U Active CN221202220U (en) | 2023-09-25 | 2023-09-25 | Dual-power circuit of feeder monitoring terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221202220U (en) |
-
2023
- 2023-09-25 CN CN202322595597.6U patent/CN221202220U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102122839B (en) | Electric-dazzling prevention auxiliary power supply in low-voltage alternating current control loop and power supply method thereof | |
| CN109066829A (en) | A kind of battery group open-circuit fault recombination discharge system and battery | |
| CN102280924B (en) | Uninterrupted power supply system for relay protection device | |
| CN103151790B (en) | A kind of electric power system of intelligent peak load shifting | |
| WO2022105263A1 (en) | Photovoltaic system and control method therefor, and air conditioning system | |
| CN206272312U (en) | A DC power system with parallel battery modules | |
| CN205791785U (en) | Collection catalyst and converter are protected in the by-pass type Anti-electricity dazzling device of one | |
| CN115954995A (en) | Standby power supply system of vehicle-mounted LCD (liquid Crystal display) play controller and control method | |
| CN112886640A (en) | Current limiting circuit and energy storage system | |
| CN114179643B (en) | Bidirectional charging pile | |
| CN221202220U (en) | Dual-power circuit of feeder monitoring terminal | |
| CN203225578U (en) | A power transmission line induction energy acquiring power supply apparatus with a high redundancy feature | |
| CN103825317A (en) | Energy-saving charger | |
| CN203671834U (en) | Soft start charging circuit | |
| CN214506569U (en) | Current limiting circuit and energy storage system | |
| CN115940382A (en) | Standby power charging device and vehicle-mounted LCD (liquid Crystal display) play controller standby power system | |
| CN210609056U (en) | Photovoltaic inverter | |
| CN113690939A (en) | Light storage all-in-one machine and control method thereof | |
| EP4550602A1 (en) | Energy storage converter, and energy storage system | |
| CN110854879A (en) | A power grid frequency modulation device applied to photovoltaic DC side | |
| CN223007485U (en) | Power protection circuit for motor controller and vehicle | |
| CN219107111U (en) | Battery group parallel device | |
| CN111900794A (en) | UPS system for realizing feedback function | |
| CN219659425U (en) | Power supply module for electrical equipment and electrical equipment | |
| CN222215276U (en) | Energy storage system and uninterrupted direct current power supply system thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |